./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/parity.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/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_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/parity.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/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_5631c7cb-4a41-49da-bd33-56bfc4f67992/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 d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:15:58,713 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:15:58,791 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:15:58,796 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:15:58,796 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:15:58,828 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:15:58,828 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:15:58,829 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:15:58,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:15:58,830 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:15:58,831 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:15:58,831 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:15:58,832 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:15:58,832 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:15:58,833 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:15:58,833 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:15:58,834 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:15:58,834 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:15:58,835 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:15:58,835 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:15:58,836 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:15:58,836 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:15:58,837 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:15:58,838 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:15:58,838 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:15:58,838 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:15:58,839 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:15:58,839 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:15:58,840 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:15:58,840 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:15:58,840 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:15:58,841 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:15:58,841 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:15:58,842 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:15:58,842 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:15:58,842 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:15:58,842 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:15:58,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:15:58,843 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:15:58,843 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:15:58,843 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:15:58,843 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:15:58,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:15:58,844 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:15:58,844 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:15:58,844 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:15:58,844 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:15:58,845 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_5631c7cb-4a41-49da-bd33-56bfc4f67992/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 [2023-12-02 18:15:59,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:15:59,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:15:59,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:15:59,086 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:15:59,087 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:15:59,088 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/bitvector/parity.i [2023-12-02 18:16:01,777 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:16:01,975 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:16:01,976 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/sv-benchmarks/c/bitvector/parity.i [2023-12-02 18:16:01,983 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/data/31b20062b/66878b6e18fb4a72837494f6f20651fa/FLAGc6c1caac3 [2023-12-02 18:16:01,995 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/data/31b20062b/66878b6e18fb4a72837494f6f20651fa [2023-12-02 18:16:01,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:16:01,999 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:16:02,000 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:16:02,000 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:16:02,005 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:16:02,005 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:16:01" (1/1) ... [2023-12-02 18:16:02,006 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71c5cd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02, skipping insertion in model container [2023-12-02 18:16:02,006 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:16:01" (1/1) ... [2023-12-02 18:16:02,030 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:16:02,164 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_5631c7cb-4a41-49da-bd33-56bfc4f67992/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2023-12-02 18:16:02,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:16:02,186 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:16:02,199 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_5631c7cb-4a41-49da-bd33-56bfc4f67992/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2023-12-02 18:16:02,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:16:02,218 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:16:02,219 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02 WrapperNode [2023-12-02 18:16:02,219 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:16:02,220 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:16:02,220 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:16:02,220 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:16:02,226 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02" (1/1) ... [2023-12-02 18:16:02,232 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02" (1/1) ... [2023-12-02 18:16:02,247 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2023-12-02 18:16:02,248 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:16:02,248 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:16:02,248 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:16:02,248 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:16:02,255 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02" (1/1) ... [2023-12-02 18:16:02,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02" (1/1) ... [2023-12-02 18:16:02,257 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02" (1/1) ... [2023-12-02 18:16:02,257 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02" (1/1) ... [2023-12-02 18:16:02,259 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02" (1/1) ... [2023-12-02 18:16:02,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02" (1/1) ... [2023-12-02 18:16:02,263 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02" (1/1) ... [2023-12-02 18:16:02,264 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02" (1/1) ... [2023-12-02 18:16:02,266 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:16:02,266 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:16:02,267 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:16:02,267 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:16:02,267 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02" (1/1) ... [2023-12-02 18:16:02,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:16:02,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:16:02,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:16:02,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:16:02,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:16:02,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:16:02,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:16:02,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:16:02,384 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:16:02,386 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:16:02,594 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:16:02,737 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:16:02,737 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:16:02,739 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:16:02 BoogieIcfgContainer [2023-12-02 18:16:02,739 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:16:02,741 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:16:02,741 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:16:02,745 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:16:02,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:16:01" (1/3) ... [2023-12-02 18:16:02,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c44b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:16:02, skipping insertion in model container [2023-12-02 18:16:02,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:02" (2/3) ... [2023-12-02 18:16:02,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c44b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:16:02, skipping insertion in model container [2023-12-02 18:16:02,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:16:02" (3/3) ... [2023-12-02 18:16:02,748 INFO L112 eAbstractionObserver]: Analyzing ICFG parity.i [2023-12-02 18:16:02,767 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:16:02,767 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:16:02,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:16:02,822 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;@31a2abdc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:16:02,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:16:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) 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 18:16:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 18:16:02,834 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:16:02,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 18:16:02,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:16:02,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:16:02,841 INFO L85 PathProgramCache]: Analyzing trace with hash 4093827, now seen corresponding path program 1 times [2023-12-02 18:16:02,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:16:02,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722339189] [2023-12-02 18:16:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:02,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:16:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:03,588 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 18:16:03,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:16:03,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722339189] [2023-12-02 18:16:03,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722339189] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:16:03,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:16:03,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:16:03,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542385813] [2023-12-02 18:16:03,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:16:03,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:16:03,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:16:03,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:16:03,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:16:03,627 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) 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) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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 18:16:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:16:03,784 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2023-12-02 18:16:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:16:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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 18:16:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:16:03,794 INFO L225 Difference]: With dead ends: 14 [2023-12-02 18:16:03,794 INFO L226 Difference]: Without dead ends: 6 [2023-12-02 18:16:03,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:16:03,800 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:16:03,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:16:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2023-12-02 18:16:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2023-12-02 18:16:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 18:16:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2023-12-02 18:16:03,832 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2023-12-02 18:16:03,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:16:03,833 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2023-12-02 18:16:03,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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 18:16:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2023-12-02 18:16:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 18:16:03,834 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:16:03,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 18:16:03,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:16:03,834 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:16:03,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:16:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash 126802956, now seen corresponding path program 1 times [2023-12-02 18:16:03,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:16:03,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090634428] [2023-12-02 18:16:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:03,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:16:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 18:16:03,875 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 18:16:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 18:16:03,935 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 18:16:03,935 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 18:16:03,937 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 18:16:03,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:16:03,941 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-02 18:16:03,944 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 18:16:03,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:16:03 BoogieIcfgContainer [2023-12-02 18:16:03,961 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 18:16:03,961 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 18:16:03,961 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 18:16:03,962 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 18:16:03,962 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:16:02" (3/4) ... [2023-12-02 18:16:03,964 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 18:16:03,965 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 18:16:03,965 INFO L158 Benchmark]: Toolchain (without parser) took 1966.35ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 127.1MB in the beginning and 97.2MB in the end (delta: 30.0MB). Peak memory consumption was 60.2MB. Max. memory is 16.1GB. [2023-12-02 18:16:03,966 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 119.5MB. Free memory is still 91.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:16:03,966 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.04ms. Allocated memory is still 157.3MB. Free memory was 127.1MB in the beginning and 116.8MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 18:16:03,967 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.81ms. Allocated memory is still 157.3MB. Free memory was 116.8MB in the beginning and 114.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 18:16:03,967 INFO L158 Benchmark]: Boogie Preprocessor took 17.70ms. Allocated memory is still 157.3MB. Free memory was 114.7MB in the beginning and 114.0MB in the end (delta: 713.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:16:03,968 INFO L158 Benchmark]: RCFGBuilder took 472.56ms. Allocated memory is still 157.3MB. Free memory was 114.0MB in the beginning and 106.7MB in the end (delta: 7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-12-02 18:16:03,968 INFO L158 Benchmark]: TraceAbstraction took 1219.41ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 105.9MB in the beginning and 98.2MB in the end (delta: 7.7MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. [2023-12-02 18:16:03,969 INFO L158 Benchmark]: Witness Printer took 3.47ms. Allocated memory is still 188.7MB. Free memory was 98.2MB in the beginning and 97.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:16:03,972 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 119.5MB. Free memory is still 91.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 219.04ms. Allocated memory is still 157.3MB. Free memory was 127.1MB in the beginning and 116.8MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.81ms. Allocated memory is still 157.3MB. Free memory was 116.8MB in the beginning and 114.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.70ms. Allocated memory is still 157.3MB. Free memory was 114.7MB in the beginning and 114.0MB in the end (delta: 713.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 472.56ms. Allocated memory is still 157.3MB. Free memory was 114.0MB in the beginning and 106.7MB in the end (delta: 7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1219.41ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 105.9MB in the beginning and 98.2MB in the end (delta: 7.7MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. * Witness Printer took 3.47ms. Allocated memory is still 188.7MB. Free memory was 98.2MB in the beginning and 97.2MB in the end (delta: 1.0MB). There was no memory consumed. 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 - UnprovableResult [Line: 25]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 59, overapproximation of bitwiseAnd at line 61. Possible FailurePath: [L42] unsigned int v = __VERIFIER_nondet_uint(); [L43] unsigned int v1; [L44] unsigned int v2; [L45] char parity1; [L46] char parity2; [L47] v1 = v [L48] parity1 = (char)0 VAL [parity1=0, v1=4294967295, v=4294967295] [L49] COND TRUE v1 != 0 [L50] COND TRUE parity1 == (char)0 [L51] parity1 = (char)1 [L55] EXPR v1 & (v1 - 1U) [L55] v1 = v1 & (v1 - 1U) [L49] COND FALSE !(v1 != 0) [L57] v2 = v [L58] parity2 = (char)0 [L59] EXPR v2 ^ (v2 >> 1u) [L59] v2 = v2 ^ (v2 >> 1u) [L60] EXPR v2 ^ (v2 >> 2u) [L60] v2 = v2 ^ (v2 >> 2u) [L61] EXPR v2 & 286331153U [L61] v2 = (v2 & 286331153U) * 286331153U [L62] COND TRUE ((v2 >> 28u) & 1u) == 0 [L63] parity2 = (char)0 [L67] CALL __VERIFIER_assert(parity1 == parity2) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13 IncrementalHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 2 mSDtfsCounter, 13 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-02 18:16:03,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/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_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/parity.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/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 d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:16:05,903 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:16:05,979 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 18:16:05,985 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:16:05,986 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:16:06,013 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:16:06,014 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:16:06,014 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:16:06,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:16:06,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:16:06,016 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:16:06,017 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:16:06,017 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:16:06,018 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:16:06,018 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:16:06,019 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:16:06,020 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:16:06,020 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:16:06,020 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:16:06,021 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:16:06,021 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:16:06,022 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:16:06,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:16:06,023 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:16:06,023 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 18:16:06,024 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 18:16:06,024 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 18:16:06,024 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:16:06,025 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:16:06,025 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:16:06,025 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:16:06,026 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 18:16:06,026 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:16:06,026 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:16:06,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:16:06,027 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:16:06,027 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:16:06,027 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:16:06,028 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 18:16:06,028 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 18:16:06,028 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:16:06,028 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:16:06,028 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:16:06,029 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:16:06,029 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_5631c7cb-4a41-49da-bd33-56bfc4f67992/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 [2023-12-02 18:16:06,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:16:06,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:16:06,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:16:06,345 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:16:06,346 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:16:06,347 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/bitvector/parity.i [2023-12-02 18:16:09,139 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:16:09,324 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:16:09,325 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/sv-benchmarks/c/bitvector/parity.i [2023-12-02 18:16:09,332 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/data/2d93207e2/ff0113a890314380a6aa115b2623587b/FLAG95453bdf1 [2023-12-02 18:16:09,345 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/data/2d93207e2/ff0113a890314380a6aa115b2623587b [2023-12-02 18:16:09,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:16:09,349 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:16:09,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:16:09,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:16:09,355 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:16:09,356 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d30a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09, skipping insertion in model container [2023-12-02 18:16:09,357 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,377 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:16:09,502 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2023-12-02 18:16:09,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:16:09,529 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:16:09,540 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_5631c7cb-4a41-49da-bd33-56bfc4f67992/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2023-12-02 18:16:09,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:16:09,559 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:16:09,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09 WrapperNode [2023-12-02 18:16:09,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:16:09,561 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:16:09,561 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:16:09,561 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:16:09,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,574 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,588 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2023-12-02 18:16:09,588 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:16:09,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:16:09,589 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:16:09,589 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:16:09,597 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,599 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,600 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,605 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,607 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,609 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,610 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,612 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:16:09,613 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:16:09,614 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:16:09,614 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:16:09,615 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09" (1/1) ... [2023-12-02 18:16:09,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:16:09,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:16:09,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:16:09,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:16:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:16:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 18:16:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:16:09,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:16:09,741 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:16:09,743 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:16:09,903 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:16:09,929 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:16:09,929 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:16:09,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:16:09 BoogieIcfgContainer [2023-12-02 18:16:09,930 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:16:09,933 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:16:09,933 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:16:09,936 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:16:09,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:16:09" (1/3) ... [2023-12-02 18:16:09,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5373d413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:16:09, skipping insertion in model container [2023-12-02 18:16:09,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:09" (2/3) ... [2023-12-02 18:16:09,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5373d413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:16:09, skipping insertion in model container [2023-12-02 18:16:09,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:16:09" (3/3) ... [2023-12-02 18:16:09,939 INFO L112 eAbstractionObserver]: Analyzing ICFG parity.i [2023-12-02 18:16:09,957 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:16:09,958 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:16:10,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:16:10,010 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;@6df5a718, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:16:10,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:16:10,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 18:16:10,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 18:16:10,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:16:10,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:16:10,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:16:10,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:16:10,026 INFO L85 PathProgramCache]: Analyzing trace with hash -675522828, now seen corresponding path program 1 times [2023-12-02 18:16:10,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:16:10,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024369016] [2023-12-02 18:16:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:10,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:16:10,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:16:10,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:16:10,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 18:16:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:10,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 18:16:10,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:10,116 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 18:16:10,117 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:16:10,117 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:16:10,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024369016] [2023-12-02 18:16:10,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024369016] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:16:10,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:16:10,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:16:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190453354] [2023-12-02 18:16:10,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:16:10,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 18:16:10,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:16:10,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 18:16:10,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 18:16:10,157 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 18:16:10,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:16:10,173 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2023-12-02 18:16:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 18:16:10,175 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 18:16:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:16:10,182 INFO L225 Difference]: With dead ends: 20 [2023-12-02 18:16:10,183 INFO L226 Difference]: Without dead ends: 10 [2023-12-02 18:16:10,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 18:16:10,189 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:16:10,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:16:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-12-02 18:16:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-12-02 18:16:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:16:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-12-02 18:16:10,219 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2023-12-02 18:16:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:16:10,220 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-12-02 18:16:10,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 18:16:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-12-02 18:16:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 18:16:10,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:16:10,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:16:10,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:16:10,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:16:10,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:16:10,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:16:10,423 INFO L85 PathProgramCache]: Analyzing trace with hash -990443489, now seen corresponding path program 1 times [2023-12-02 18:16:10,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:16:10,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914164105] [2023-12-02 18:16:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:10,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:16:10,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:16:10,425 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:16:10,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 18:16:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:10,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:16:10,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:10,559 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 18:16:10,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:16:10,559 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:16:10,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914164105] [2023-12-02 18:16:10,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914164105] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:16:10,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:16:10,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:16:10,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730944611] [2023-12-02 18:16:10,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:16:10,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:16:10,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:16:10,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:16:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:16:10,563 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 18:16:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:16:10,612 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-12-02 18:16:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:16:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 18:16:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:16:10,613 INFO L225 Difference]: With dead ends: 30 [2023-12-02 18:16:10,614 INFO L226 Difference]: Without dead ends: 19 [2023-12-02 18:16:10,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:16:10,616 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:16:10,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:16:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-02 18:16:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2023-12-02 18:16:10,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:16:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-12-02 18:16:10,622 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2023-12-02 18:16:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:16:10,622 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-12-02 18:16:10,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 18:16:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-12-02 18:16:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 18:16:10,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:16:10,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:16:10,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 18:16:10,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:16:10,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:16:10,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:16:10,826 INFO L85 PathProgramCache]: Analyzing trace with hash -990383907, now seen corresponding path program 1 times [2023-12-02 18:16:10,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:16:10,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718188354] [2023-12-02 18:16:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:10,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:16:10,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:16:10,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:16:10,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 18:16:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:10,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:16:10,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:10,898 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 18:16:10,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:16:10,898 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:16:10,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718188354] [2023-12-02 18:16:10,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718188354] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:16:10,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:16:10,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:16:10,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80269813] [2023-12-02 18:16:10,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:16:10,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:16:10,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:16:10,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:16:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:16:10,902 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 18:16:10,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:16:10,966 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-12-02 18:16:10,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:16:10,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 18:16:10,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:16:10,967 INFO L225 Difference]: With dead ends: 24 [2023-12-02 18:16:10,968 INFO L226 Difference]: Without dead ends: 18 [2023-12-02 18:16:10,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:16:10,969 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:16:10,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:16:10,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-02 18:16:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2023-12-02 18:16:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 18:16:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-12-02 18:16:10,974 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 7 [2023-12-02 18:16:10,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:16:10,975 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-12-02 18:16:10,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 18:16:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-12-02 18:16:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 18:16:10,975 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:16:10,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:16:10,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-12-02 18:16:11,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:16:11,178 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:16:11,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:16:11,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1541171670, now seen corresponding path program 1 times [2023-12-02 18:16:11,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:16:11,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271484641] [2023-12-02 18:16:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:11,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:16:11,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:16:11,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:16:11,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-02 18:16:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:11,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:16:11,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:11,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:16:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:12,152 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:16:12,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271484641] [2023-12-02 18:16:12,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271484641] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:16:12,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1688411798] [2023-12-02 18:16:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:12,153 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:16:12,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:16:12,158 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:16:12,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-12-02 18:16:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:12,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:16:12,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:12,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:16:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:12,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1688411798] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:16:12,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788348062] [2023-12-02 18:16:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:12,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:16:12,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:16:12,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:16:12,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:16:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:12,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:16:12,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:12,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:16:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:12,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788348062] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:16:12,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:16:12,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2023-12-02 18:16:12,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421468136] [2023-12-02 18:16:12,754 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:16:12,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 18:16:12,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:16:12,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 18:16:12,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:16:12,756 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 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 18:16:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:16:13,673 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-12-02 18:16:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:16:13,673 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 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 10 [2023-12-02 18:16:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:16:13,674 INFO L225 Difference]: With dead ends: 52 [2023-12-02 18:16:13,674 INFO L226 Difference]: Without dead ends: 48 [2023-12-02 18:16:13,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:16:13,677 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:16:13,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 62 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:16:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-02 18:16:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2023-12-02 18:16:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 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 18:16:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-12-02 18:16:13,687 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-12-02 18:16:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:16:13,687 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-12-02 18:16:13,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 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 18:16:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-12-02 18:16:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 18:16:13,688 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:16:13,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:16:13,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-12-02 18:16:13,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2023-12-02 18:16:14,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:16:14,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:16:14,291 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:16:14,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:16:14,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1541231252, now seen corresponding path program 1 times [2023-12-02 18:16:14,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:16:14,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191686803] [2023-12-02 18:16:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:14,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:16:14,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:16:14,293 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:16:14,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-02 18:16:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:14,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:16:14,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:14,342 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 18:16:14,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:16:14,343 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:16:14,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191686803] [2023-12-02 18:16:14,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191686803] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:16:14,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:16:14,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:16:14,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907040092] [2023-12-02 18:16:14,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:16:14,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:16:14,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:16:14,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:16:14,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:16:14,345 INFO L87 Difference]: Start difference. First operand 28 states and 37 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 18:16:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:16:14,386 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2023-12-02 18:16:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:16:14,386 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 10 [2023-12-02 18:16:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:16:14,387 INFO L225 Difference]: With dead ends: 52 [2023-12-02 18:16:14,387 INFO L226 Difference]: Without dead ends: 29 [2023-12-02 18:16:14,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:16:14,389 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 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 18:16:14,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:16:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-02 18:16:14,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2023-12-02 18:16:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 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 18:16:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-12-02 18:16:14,396 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 10 [2023-12-02 18:16:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:16:14,396 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-12-02 18:16:14,396 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 18:16:14,397 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-12-02 18:16:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 18:16:14,397 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:16:14,398 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:16:14,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-12-02 18:16:14,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:16:14,602 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:16:14,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:16:14,602 INFO L85 PathProgramCache]: Analyzing trace with hash 453368635, now seen corresponding path program 1 times [2023-12-02 18:16:14,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:16:14,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359536530] [2023-12-02 18:16:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:14,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:16:14,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:16:14,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:16:14,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-12-02 18:16:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:14,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:16:14,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:15,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:16:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:16,547 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:16:16,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359536530] [2023-12-02 18:16:16,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359536530] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:16:16,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1970593719] [2023-12-02 18:16:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:16,548 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:16:16,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:16:16,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:16:16,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-12-02 18:16:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:16,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:16:16,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:16,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:16:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:17,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1970593719] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:16:17,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334671472] [2023-12-02 18:16:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:17,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:16:17,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:16:17,099 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:16:17,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:16:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:17,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:16:17,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:17,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:16:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:17,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334671472] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:16:17,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:16:17,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7, 7, 8, 7] total 15 [2023-12-02 18:16:17,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755092929] [2023-12-02 18:16:17,628 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:16:17,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 18:16:17,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:16:17,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 18:16:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:16:17,629 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 18:16:18,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:16:18,579 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2023-12-02 18:16:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 18:16:18,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 13 [2023-12-02 18:16:18,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:16:18,581 INFO L225 Difference]: With dead ends: 40 [2023-12-02 18:16:18,581 INFO L226 Difference]: Without dead ends: 32 [2023-12-02 18:16:18,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-12-02 18:16:18,582 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:16:18,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 70 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:16:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-02 18:16:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-12-02 18:16:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 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 18:16:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-12-02 18:16:18,589 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 13 [2023-12-02 18:16:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:16:18,589 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-12-02 18:16:18,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 18:16:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-12-02 18:16:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 18:16:18,590 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:16:18,590 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:16:18,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-12-02 18:16:18,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2023-12-02 18:16:18,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 18:16:19,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:16:19,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:16:19,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:16:19,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1775642086, now seen corresponding path program 1 times [2023-12-02 18:16:19,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:16:19,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64120190] [2023-12-02 18:16:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:19,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:16:19,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:16:19,194 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:16:19,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-02 18:16:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:19,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 18:16:19,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:21,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:16:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:37,166 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:16:37,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64120190] [2023-12-02 18:16:37,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64120190] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:16:37,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2005909012] [2023-12-02 18:16:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:37,167 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:16:37,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:16:37,170 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:16:37,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-12-02 18:16:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:37,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 18:16:37,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:42,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:16:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:42,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2005909012] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:16:42,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082301960] [2023-12-02 18:16:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:16:42,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:16:42,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:16:42,928 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:16:42,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 18:16:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:16:43,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 18:16:43,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:16:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:44,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:16:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:16:44,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082301960] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:16:44,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:16:44,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11, 10, 14, 10] total 26 [2023-12-02 18:16:44,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570016332] [2023-12-02 18:16:44,896 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:16:44,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 18:16:44,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:16:44,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 18:16:44,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2023-12-02 18:16:44,898 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 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 18:16:48,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:17:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:17:14,044 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-12-02 18:17:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 18:17:14,045 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 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 22 [2023-12-02 18:17:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:17:14,047 INFO L225 Difference]: With dead ends: 61 [2023-12-02 18:17:14,047 INFO L226 Difference]: Without dead ends: 53 [2023-12-02 18:17:14,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=287, Invalid=1117, Unknown=2, NotChecked=0, Total=1406 [2023-12-02 18:17:14,048 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:17:14,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 154 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-12-02 18:17:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-02 18:17:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-12-02 18:17:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 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 18:17:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-12-02 18:17:14,055 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 22 [2023-12-02 18:17:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:17:14,055 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-12-02 18:17:14,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 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 18:17:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-12-02 18:17:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 18:17:14,056 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:17:14,056 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:17:14,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2023-12-02 18:17:14,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-12-02 18:17:14,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 18:17:14,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:17:14,658 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:17:14,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:17:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash -727624585, now seen corresponding path program 2 times [2023-12-02 18:17:14,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:17:14,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145567980] [2023-12-02 18:17:14,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:17:14,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:17:14,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:17:14,659 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:17:14,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-12-02 18:17:14,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:17:14,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:17:14,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:17:14,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:17:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:17:17,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:17:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:17:44,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:17:44,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145567980] [2023-12-02 18:17:44,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145567980] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:17:44,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1057473407] [2023-12-02 18:17:44,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:17:44,533 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:17:44,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:17:44,534 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:17:44,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-12-02 18:17:44,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:17:44,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:17:44,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:17:44,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:17:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:17:54,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:17:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:17:55,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1057473407] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:17:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796480063] [2023-12-02 18:17:55,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:17:55,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:17:55,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:17:55,600 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:17:55,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 18:17:56,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:17:56,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:17:57,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 18:17:57,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:17:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:17:57,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:17:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:17:58,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796480063] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:17:58,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:17:58,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 12, 11, 15, 11] total 30 [2023-12-02 18:17:58,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297655107] [2023-12-02 18:17:58,714 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:17:58,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 18:17:58,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:17:58,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 18:17:58,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=773, Unknown=1, NotChecked=0, Total=930 [2023-12-02 18:17:58,716 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 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 18:18:01,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:18:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:18:37,096 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2023-12-02 18:18:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 18:18:37,099 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 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 25 [2023-12-02 18:18:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:18:37,100 INFO L225 Difference]: With dead ends: 64 [2023-12-02 18:18:37,100 INFO L226 Difference]: Without dead ends: 56 [2023-12-02 18:18:37,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 71.4s TimeCoverageRelationStatistics Valid=341, Invalid=1464, Unknown=1, NotChecked=0, Total=1806 [2023-12-02 18:18:37,102 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:18:37,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 144 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 18:18:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-02 18:18:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2023-12-02 18:18:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 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 18:18:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2023-12-02 18:18:37,112 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 25 [2023-12-02 18:18:37,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:18:37,113 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2023-12-02 18:18:37,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 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 18:18:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2023-12-02 18:18:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 18:18:37,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:18:37,114 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:18:37,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 18:18:37,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-12-02 18:18:37,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2023-12-02 18:18:37,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:18:37,715 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:18:37,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:18:37,716 INFO L85 PathProgramCache]: Analyzing trace with hash 342812834, now seen corresponding path program 2 times [2023-12-02 18:18:37,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:18:37,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930414315] [2023-12-02 18:18:37,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:18:37,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:18:37,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:18:37,717 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:18:37,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-12-02 18:18:38,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:18:38,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:18:38,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 18:18:38,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:18:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:18:57,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:23:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:23:47,582 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:23:47,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930414315] [2023-12-02 18:23:47,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930414315] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:23:47,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [662419624] [2023-12-02 18:23:47,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:23:47,582 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:23:47,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:23:47,583 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:23:47,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-12-02 18:23:47,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:23:47,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:23:47,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:23:47,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:25:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:25:46,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:25:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:25:49,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [662419624] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:25:49,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131439925] [2023-12-02 18:25:49,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:25:49,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:25:49,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:25:49,586 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:25:49,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5631c7cb-4a41-49da-bd33-56bfc4f67992/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 18:25:56,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:25:56,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:25:56,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 18:25:56,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:25:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:25:59,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:26:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:26:02,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131439925] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:26:02,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:26:02,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 18, 20, 18, 21, 18] total 57 [2023-12-02 18:26:02,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687686177] [2023-12-02 18:26:02,034 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:26:02,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-02 18:26:02,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:26:02,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-02 18:26:02,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2858, Unknown=103, NotChecked=0, Total=3306 [2023-12-02 18:26:02,037 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 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 18:26:22,655 WARN L293 SmtUtils]: Spent 11.80s on a formula simplification. DAG size of input: 56 DAG size of output: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:26:24,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:26:40,979 WARN L293 SmtUtils]: Spent 12.21s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:26:50,208 WARN L293 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 56 DAG size of output: 14 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:26:52,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:26:59,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:27:19,348 WARN L293 SmtUtils]: Spent 9.88s on a formula simplification. DAG size of input: 64 DAG size of output: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:27:29,577 WARN L293 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:27:39,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:27:54,350 WARN L293 SmtUtils]: Spent 11.75s on a formula simplification. DAG size of input: 60 DAG size of output: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:27:56,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:28:11,774 WARN L293 SmtUtils]: Spent 12.01s on a formula simplification. DAG size of input: 60 DAG size of output: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:28:13,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:28:16,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:28:37,654 WARN L293 SmtUtils]: Spent 18.31s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:28:39,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:28:55,139 WARN L293 SmtUtils]: Spent 10.07s on a formula simplification. DAG size of input: 64 DAG size of output: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:28:57,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:28:59,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:29:12,845 WARN L293 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 64 DAG size of output: 24 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:29:15,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 18:29:29,086 WARN L293 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 64 DAG size of output: 24 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:29:55,288 WARN L293 SmtUtils]: Spent 18.42s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:30:21,686 WARN L293 SmtUtils]: Spent 24.42s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:30:47,650 WARN L293 SmtUtils]: Spent 22.33s on a formula simplification. DAG size of input: 76 DAG size of output: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:31:11,399 WARN L293 SmtUtils]: Spent 16.42s on a formula simplification. DAG size of input: 76 DAG size of output: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)