./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/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_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/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_96a97f8b-7181-4713-8874-77f23542813f/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 67239f1bf7e0cdf325715bd48f4c9c86a0588f752ce48acb5db8e3f7bfd7cd18 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:40:08,742 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:40:08,801 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:40:08,806 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:40:08,806 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:40:08,826 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:40:08,827 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:40:08,827 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:40:08,828 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:40:08,829 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:40:08,829 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:40:08,830 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:40:08,830 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:40:08,831 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:40:08,831 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:40:08,832 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:40:08,832 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:40:08,833 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:40:08,833 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:40:08,834 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:40:08,834 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:40:08,835 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:40:08,836 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:40:08,836 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:40:08,837 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:40:08,837 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:40:08,837 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:40:08,837 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:40:08,838 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:40:08,838 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:40:08,838 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:40:08,839 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:40:08,839 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:40:08,839 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:40:08,840 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:40:08,840 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:40:08,840 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:40:08,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:40:08,840 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:40:08,841 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:40:08,841 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:40:08,841 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:40:08,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:40:08,841 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:40:08,842 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:40:08,842 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:40:08,842 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:40:08,842 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_96a97f8b-7181-4713-8874-77f23542813f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67239f1bf7e0cdf325715bd48f4c9c86a0588f752ce48acb5db8e3f7bfd7cd18 [2023-12-02 16:40:09,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:40:09,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:40:09,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:40:09,082 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:40:09,082 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:40:09,083 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/eca-rers2012/Problem03_label13.c [2023-12-02 16:40:11,801 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:40:12,102 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:40:12,103 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/sv-benchmarks/c/eca-rers2012/Problem03_label13.c [2023-12-02 16:40:12,123 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/data/dab50560a/a777d29d3d5746ee8d29d484c35f4779/FLAG9a64441e3 [2023-12-02 16:40:12,137 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/data/dab50560a/a777d29d3d5746ee8d29d484c35f4779 [2023-12-02 16:40:12,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:40:12,141 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:40:12,143 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:40:12,143 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:40:12,148 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:40:12,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:12,149 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b8fd99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12, skipping insertion in model container [2023-12-02 16:40:12,150 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:12,242 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:40:12,711 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_96a97f8b-7181-4713-8874-77f23542813f/sv-benchmarks/c/eca-rers2012/Problem03_label13.c[55139,55152] [2023-12-02 16:40:12,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:40:12,753 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:40:12,901 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_96a97f8b-7181-4713-8874-77f23542813f/sv-benchmarks/c/eca-rers2012/Problem03_label13.c[55139,55152] [2023-12-02 16:40:12,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:40:12,929 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:40:12,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12 WrapperNode [2023-12-02 16:40:12,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:40:12,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:40:12,930 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:40:12,930 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:40:12,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:12,965 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:13,028 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-12-02 16:40:13,028 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:40:13,029 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:40:13,029 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:40:13,029 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:40:13,036 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:13,036 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:13,042 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:13,043 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:13,082 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:13,093 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:13,108 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:13,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:13,124 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:40:13,125 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:40:13,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:40:13,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:40:13,127 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12" (1/1) ... [2023-12-02 16:40:13,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:40:13,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:40:13,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:40:13,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:40:13,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:40:13,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:40:13,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:40:13,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:40:13,308 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:40:13,311 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:40:15,026 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:40:15,388 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:40:15,388 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 16:40:15,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:40:15 BoogieIcfgContainer [2023-12-02 16:40:15,390 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:40:15,392 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:40:15,392 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:40:15,395 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:40:15,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:40:12" (1/3) ... [2023-12-02 16:40:15,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42bf2b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:40:15, skipping insertion in model container [2023-12-02 16:40:15,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:12" (2/3) ... [2023-12-02 16:40:15,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42bf2b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:40:15, skipping insertion in model container [2023-12-02 16:40:15,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:40:15" (3/3) ... [2023-12-02 16:40:15,398 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2023-12-02 16:40:15,416 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:40:15,417 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:40:15,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:40:15,475 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;@301f2728, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:40:15,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:40:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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 16:40:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-12-02 16:40:15,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:15,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:15,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:15,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:15,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1070323663, now seen corresponding path program 1 times [2023-12-02 16:40:15,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:15,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106386971] [2023-12-02 16:40:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:15,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:40:16,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:16,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106386971] [2023-12-02 16:40:16,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106386971] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:16,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:16,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:40:16,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677359939] [2023-12-02 16:40:16,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:16,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:40:16,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:16,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:40:16,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:16,292 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 16:40:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:17,118 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2023-12-02 16:40:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:40:17,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2023-12-02 16:40:17,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:17,130 INFO L225 Difference]: With dead ends: 440 [2023-12-02 16:40:17,131 INFO L226 Difference]: Without dead ends: 289 [2023-12-02 16:40:17,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:17,137 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:17,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 57 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 16:40:17,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-12-02 16:40:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-12-02 16:40:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.9270833333333333) internal successors, (555), 288 states have internal predecessors, (555), 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 16:40:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 555 transitions. [2023-12-02 16:40:17,199 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 555 transitions. Word has length 143 [2023-12-02 16:40:17,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:17,200 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 555 transitions. [2023-12-02 16:40:17,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 16:40:17,201 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 555 transitions. [2023-12-02 16:40:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-02 16:40:17,205 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:17,205 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:17,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:40:17,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:17,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:17,206 INFO L85 PathProgramCache]: Analyzing trace with hash -530992409, now seen corresponding path program 1 times [2023-12-02 16:40:17,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:17,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364760727] [2023-12-02 16:40:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:40:17,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:17,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364760727] [2023-12-02 16:40:17,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364760727] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:17,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:17,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:40:17,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685854420] [2023-12-02 16:40:17,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:17,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:40:17,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:17,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:40:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:17,797 INFO L87 Difference]: Start difference. First operand 289 states and 555 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 16:40:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:18,477 INFO L93 Difference]: Finished difference Result 863 states and 1662 transitions. [2023-12-02 16:40:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:40:18,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 147 [2023-12-02 16:40:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:18,482 INFO L225 Difference]: With dead ends: 863 [2023-12-02 16:40:18,483 INFO L226 Difference]: Without dead ends: 575 [2023-12-02 16:40:18,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:18,486 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 147 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:18,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 37 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:40:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-12-02 16:40:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2023-12-02 16:40:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.8449477351916377) internal successors, (1059), 574 states have internal predecessors, (1059), 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 16:40:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1059 transitions. [2023-12-02 16:40:18,515 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1059 transitions. Word has length 147 [2023-12-02 16:40:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:18,516 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1059 transitions. [2023-12-02 16:40:18,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 16:40:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1059 transitions. [2023-12-02 16:40:18,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 16:40:18,522 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:18,523 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:18,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:40:18,523 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:18,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:18,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2116558183, now seen corresponding path program 1 times [2023-12-02 16:40:18,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:18,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311267184] [2023-12-02 16:40:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:18,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:40:18,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:18,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311267184] [2023-12-02 16:40:18,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311267184] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:18,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:18,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:40:18,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579610270] [2023-12-02 16:40:18,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:18,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:40:18,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:18,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:40:18,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:18,767 INFO L87 Difference]: Start difference. First operand 575 states and 1059 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 16:40:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:19,451 INFO L93 Difference]: Finished difference Result 1723 states and 3175 transitions. [2023-12-02 16:40:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:40:19,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 148 [2023-12-02 16:40:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:19,458 INFO L225 Difference]: With dead ends: 1723 [2023-12-02 16:40:19,458 INFO L226 Difference]: Without dead ends: 1149 [2023-12-02 16:40:19,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:19,461 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 166 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:19,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 56 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:40:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2023-12-02 16:40:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2023-12-02 16:40:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.6858638743455496) internal successors, (1932), 1146 states have internal predecessors, (1932), 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 16:40:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1932 transitions. [2023-12-02 16:40:19,498 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1932 transitions. Word has length 148 [2023-12-02 16:40:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:19,499 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1932 transitions. [2023-12-02 16:40:19,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 16:40:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1932 transitions. [2023-12-02 16:40:19,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 16:40:19,503 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:19,503 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:19,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:40:19,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:19,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:19,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1973860897, now seen corresponding path program 1 times [2023-12-02 16:40:19,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:19,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687395819] [2023-12-02 16:40:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:19,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:40:19,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:19,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687395819] [2023-12-02 16:40:19,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687395819] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:19,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:19,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:40:19,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366672596] [2023-12-02 16:40:19,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:19,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:40:19,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:19,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:40:19,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:19,745 INFO L87 Difference]: Start difference. First operand 1147 states and 1932 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 16:40:20,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:20,497 INFO L93 Difference]: Finished difference Result 2722 states and 4670 transitions. [2023-12-02 16:40:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:40:20,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 158 [2023-12-02 16:40:20,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:20,507 INFO L225 Difference]: With dead ends: 2722 [2023-12-02 16:40:20,507 INFO L226 Difference]: Without dead ends: 1576 [2023-12-02 16:40:20,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:20,511 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:20,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 232 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:40:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2023-12-02 16:40:20,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1433. [2023-12-02 16:40:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.6508379888268156) internal successors, (2364), 1432 states have internal predecessors, (2364), 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 16:40:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 2364 transitions. [2023-12-02 16:40:20,553 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 2364 transitions. Word has length 158 [2023-12-02 16:40:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:20,554 INFO L495 AbstractCegarLoop]: Abstraction has 1433 states and 2364 transitions. [2023-12-02 16:40:20,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 16:40:20,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 2364 transitions. [2023-12-02 16:40:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 16:40:20,558 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:20,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:20,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:40:20,559 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:20,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:20,559 INFO L85 PathProgramCache]: Analyzing trace with hash -913020708, now seen corresponding path program 1 times [2023-12-02 16:40:20,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:20,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613859062] [2023-12-02 16:40:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:20,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:40:20,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:20,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613859062] [2023-12-02 16:40:20,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613859062] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:20,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:20,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:40:20,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902621482] [2023-12-02 16:40:20,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:20,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:40:20,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:20,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:40:20,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:20,927 INFO L87 Difference]: Start difference. First operand 1433 states and 2364 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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 16:40:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:21,691 INFO L93 Difference]: Finished difference Result 4152 states and 6818 transitions. [2023-12-02 16:40:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:40:21,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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 160 [2023-12-02 16:40:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:21,705 INFO L225 Difference]: With dead ends: 4152 [2023-12-02 16:40:21,705 INFO L226 Difference]: Without dead ends: 2720 [2023-12-02 16:40:21,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:21,709 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 143 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:21,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 96 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:40:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2023-12-02 16:40:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2720. [2023-12-02 16:40:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2720 states, 2719 states have (on average 1.4133872747333578) internal successors, (3843), 2719 states have internal predecessors, (3843), 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 16:40:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 3843 transitions. [2023-12-02 16:40:21,774 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 3843 transitions. Word has length 160 [2023-12-02 16:40:21,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:21,775 INFO L495 AbstractCegarLoop]: Abstraction has 2720 states and 3843 transitions. [2023-12-02 16:40:21,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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 16:40:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 3843 transitions. [2023-12-02 16:40:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-12-02 16:40:21,779 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:21,780 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:21,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:40:21,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:21,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:21,781 INFO L85 PathProgramCache]: Analyzing trace with hash 608231094, now seen corresponding path program 1 times [2023-12-02 16:40:21,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:21,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472138595] [2023-12-02 16:40:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:21,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:40:22,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:22,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472138595] [2023-12-02 16:40:22,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472138595] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:22,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:22,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:40:22,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031259859] [2023-12-02 16:40:22,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:22,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:22,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:22,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:22,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:22,067 INFO L87 Difference]: Start difference. First operand 2720 states and 3843 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 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 16:40:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:23,344 INFO L93 Difference]: Finished difference Result 10448 states and 14883 transitions. [2023-12-02 16:40:23,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:40:23,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 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 170 [2023-12-02 16:40:23,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:23,382 INFO L225 Difference]: With dead ends: 10448 [2023-12-02 16:40:23,382 INFO L226 Difference]: Without dead ends: 7872 [2023-12-02 16:40:23,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:23,388 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 650 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:23,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 21 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 16:40:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7872 states. [2023-12-02 16:40:23,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7872 to 7868. [2023-12-02 16:40:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7868 states, 7867 states have (on average 1.3929070802084658) internal successors, (10958), 7867 states have internal predecessors, (10958), 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 16:40:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7868 states to 7868 states and 10958 transitions. [2023-12-02 16:40:23,572 INFO L78 Accepts]: Start accepts. Automaton has 7868 states and 10958 transitions. Word has length 170 [2023-12-02 16:40:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:23,573 INFO L495 AbstractCegarLoop]: Abstraction has 7868 states and 10958 transitions. [2023-12-02 16:40:23,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 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 16:40:23,573 INFO L276 IsEmpty]: Start isEmpty. Operand 7868 states and 10958 transitions. [2023-12-02 16:40:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-12-02 16:40:23,580 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:23,581 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:23,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 16:40:23,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:23,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:23,582 INFO L85 PathProgramCache]: Analyzing trace with hash 245513399, now seen corresponding path program 1 times [2023-12-02 16:40:23,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:23,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650420210] [2023-12-02 16:40:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:23,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:40:23,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:23,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650420210] [2023-12-02 16:40:23,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650420210] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:23,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:23,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:40:23,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969574588] [2023-12-02 16:40:23,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:23,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:40:23,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:23,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:40:23,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:23,906 INFO L87 Difference]: Start difference. First operand 7868 states and 10958 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 16:40:24,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:24,682 INFO L93 Difference]: Finished difference Result 21455 states and 29864 transitions. [2023-12-02 16:40:24,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:40:24,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 245 [2023-12-02 16:40:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:24,739 INFO L225 Difference]: With dead ends: 21455 [2023-12-02 16:40:24,739 INFO L226 Difference]: Without dead ends: 13731 [2023-12-02 16:40:24,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:24,750 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 19 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:24,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 105 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:40:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13731 states. [2023-12-02 16:40:25,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13731 to 13731. [2023-12-02 16:40:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13731 states, 13730 states have (on average 1.3485069191551347) internal successors, (18515), 13730 states have internal predecessors, (18515), 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 16:40:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13731 states to 13731 states and 18515 transitions. [2023-12-02 16:40:25,071 INFO L78 Accepts]: Start accepts. Automaton has 13731 states and 18515 transitions. Word has length 245 [2023-12-02 16:40:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:25,072 INFO L495 AbstractCegarLoop]: Abstraction has 13731 states and 18515 transitions. [2023-12-02 16:40:25,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 16:40:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13731 states and 18515 transitions. [2023-12-02 16:40:25,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-12-02 16:40:25,084 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:25,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:25,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 16:40:25,085 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:25,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:25,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2108254486, now seen corresponding path program 1 times [2023-12-02 16:40:25,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:25,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202877426] [2023-12-02 16:40:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:25,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 16:40:25,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:25,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202877426] [2023-12-02 16:40:25,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202877426] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:25,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:25,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:40:25,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500140109] [2023-12-02 16:40:25,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:25,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:40:25,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:25,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:40:25,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:25,378 INFO L87 Difference]: Start difference. First operand 13731 states and 18515 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 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 16:40:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:25,860 INFO L93 Difference]: Finished difference Result 39332 states and 52961 transitions. [2023-12-02 16:40:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:40:25,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 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 253 [2023-12-02 16:40:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:25,911 INFO L225 Difference]: With dead ends: 39332 [2023-12-02 16:40:25,911 INFO L226 Difference]: Without dead ends: 25745 [2023-12-02 16:40:25,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:25,927 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 161 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:25,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 313 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:40:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25745 states. [2023-12-02 16:40:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25745 to 25743. [2023-12-02 16:40:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25743 states, 25742 states have (on average 1.3422422500194235) internal successors, (34552), 25742 states have internal predecessors, (34552), 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 16:40:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25743 states to 25743 states and 34552 transitions. [2023-12-02 16:40:26,291 INFO L78 Accepts]: Start accepts. Automaton has 25743 states and 34552 transitions. Word has length 253 [2023-12-02 16:40:26,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:26,291 INFO L495 AbstractCegarLoop]: Abstraction has 25743 states and 34552 transitions. [2023-12-02 16:40:26,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 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 16:40:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 25743 states and 34552 transitions. [2023-12-02 16:40:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-12-02 16:40:26,303 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:26,303 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:26,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 16:40:26,303 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:26,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1518734791, now seen corresponding path program 1 times [2023-12-02 16:40:26,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:26,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117186327] [2023-12-02 16:40:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:26,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:40:26,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:26,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117186327] [2023-12-02 16:40:26,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117186327] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:26,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:26,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:40:26,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714394482] [2023-12-02 16:40:26,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:26,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:40:26,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:26,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:40:26,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:26,522 INFO L87 Difference]: Start difference. First operand 25743 states and 34552 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 16:40:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:27,393 INFO L93 Difference]: Finished difference Result 57205 states and 77636 transitions. [2023-12-02 16:40:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:40:27,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 254 [2023-12-02 16:40:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:27,432 INFO L225 Difference]: With dead ends: 57205 [2023-12-02 16:40:27,432 INFO L226 Difference]: Without dead ends: 31606 [2023-12-02 16:40:27,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:27,454 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 175 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:27,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 213 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:40:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31606 states. [2023-12-02 16:40:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31606 to 31606. [2023-12-02 16:40:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31606 states, 31605 states have (on average 1.2943205189052365) internal successors, (40907), 31605 states have internal predecessors, (40907), 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 16:40:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31606 states to 31606 states and 40907 transitions. [2023-12-02 16:40:27,848 INFO L78 Accepts]: Start accepts. Automaton has 31606 states and 40907 transitions. Word has length 254 [2023-12-02 16:40:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:27,849 INFO L495 AbstractCegarLoop]: Abstraction has 31606 states and 40907 transitions. [2023-12-02 16:40:27,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 16:40:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 31606 states and 40907 transitions. [2023-12-02 16:40:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-12-02 16:40:27,858 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:27,859 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:27,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 16:40:27,859 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:27,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:27,859 INFO L85 PathProgramCache]: Analyzing trace with hash 61685586, now seen corresponding path program 1 times [2023-12-02 16:40:27,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:27,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565252389] [2023-12-02 16:40:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:27,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 130 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 16:40:28,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:28,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565252389] [2023-12-02 16:40:28,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565252389] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:40:28,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717604064] [2023-12-02 16:40:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:28,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:40:28,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:40:28,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:40:28,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:40:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:28,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:40:28,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:40:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 16:40:28,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:40:28,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717604064] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:28,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:40:28,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-02 16:40:28,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376832834] [2023-12-02 16:40:28,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:28,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:40:28,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:28,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:40:28,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:40:28,670 INFO L87 Difference]: Start difference. First operand 31606 states and 40907 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 16:40:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:29,584 INFO L93 Difference]: Finished difference Result 77084 states and 100110 transitions. [2023-12-02 16:40:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:40:29,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 265 [2023-12-02 16:40:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:29,647 INFO L225 Difference]: With dead ends: 77084 [2023-12-02 16:40:29,647 INFO L226 Difference]: Without dead ends: 45622 [2023-12-02 16:40:29,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:40:29,674 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 57 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:29,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 261 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:40:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45622 states. [2023-12-02 16:40:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45622 to 45620. [2023-12-02 16:40:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45620 states, 45619 states have (on average 1.285385475350183) internal successors, (58638), 45619 states have internal predecessors, (58638), 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 16:40:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45620 states to 45620 states and 58638 transitions. [2023-12-02 16:40:30,375 INFO L78 Accepts]: Start accepts. Automaton has 45620 states and 58638 transitions. Word has length 265 [2023-12-02 16:40:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:30,375 INFO L495 AbstractCegarLoop]: Abstraction has 45620 states and 58638 transitions. [2023-12-02 16:40:30,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 16:40:30,375 INFO L276 IsEmpty]: Start isEmpty. Operand 45620 states and 58638 transitions. [2023-12-02 16:40:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-12-02 16:40:30,386 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:30,386 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:30,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:40:30,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:40:30,588 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:30,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1414981000, now seen corresponding path program 1 times [2023-12-02 16:40:30,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:30,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401564219] [2023-12-02 16:40:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:30,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:40:30,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:30,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401564219] [2023-12-02 16:40:30,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401564219] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:30,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:30,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:40:30,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132589853] [2023-12-02 16:40:30,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:30,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:40:30,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:30,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:40:30,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:30,850 INFO L87 Difference]: Start difference. First operand 45620 states and 58638 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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 16:40:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:31,709 INFO L93 Difference]: Finished difference Result 98103 states and 126631 transitions. [2023-12-02 16:40:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:40:31,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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 266 [2023-12-02 16:40:31,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:31,756 INFO L225 Difference]: With dead ends: 98103 [2023-12-02 16:40:31,756 INFO L226 Difference]: Without dead ends: 52627 [2023-12-02 16:40:31,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:40:31,779 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:31,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 54 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:40:31,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52627 states. [2023-12-02 16:40:32,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52627 to 47479. [2023-12-02 16:40:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47479 states, 47478 states have (on average 1.2872067062639538) internal successors, (61114), 47478 states have internal predecessors, (61114), 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 16:40:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47479 states to 47479 states and 61114 transitions. [2023-12-02 16:40:32,440 INFO L78 Accepts]: Start accepts. Automaton has 47479 states and 61114 transitions. Word has length 266 [2023-12-02 16:40:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:32,440 INFO L495 AbstractCegarLoop]: Abstraction has 47479 states and 61114 transitions. [2023-12-02 16:40:32,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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 16:40:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 47479 states and 61114 transitions. [2023-12-02 16:40:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-12-02 16:40:32,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:32,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:32,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 16:40:32,453 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:32,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:32,454 INFO L85 PathProgramCache]: Analyzing trace with hash -891781355, now seen corresponding path program 1 times [2023-12-02 16:40:32,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:32,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533507853] [2023-12-02 16:40:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:40:33,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:33,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533507853] [2023-12-02 16:40:33,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533507853] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:40:33,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323986780] [2023-12-02 16:40:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:33,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:40:33,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:40:33,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:40:33,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:40:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:33,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:40:33,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:40:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:40:33,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:40:33,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323986780] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:33,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:40:33,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-02 16:40:33,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380758815] [2023-12-02 16:40:33,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:33,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:40:33,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:33,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:40:34,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:40:34,000 INFO L87 Difference]: Start difference. First operand 47479 states and 61114 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 16:40:34,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:34,950 INFO L93 Difference]: Finished difference Result 106826 states and 137267 transitions. [2023-12-02 16:40:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:40:34,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 271 [2023-12-02 16:40:34,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:35,002 INFO L225 Difference]: With dead ends: 106826 [2023-12-02 16:40:35,002 INFO L226 Difference]: Without dead ends: 59491 [2023-12-02 16:40:35,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:40:35,025 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:35,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 189 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:40:35,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59491 states. [2023-12-02 16:40:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59491 to 58633. [2023-12-02 16:40:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58633 states, 58632 states have (on average 1.2579819893573476) internal successors, (73758), 58632 states have internal predecessors, (73758), 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 16:40:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58633 states to 58633 states and 73758 transitions. [2023-12-02 16:40:35,686 INFO L78 Accepts]: Start accepts. Automaton has 58633 states and 73758 transitions. Word has length 271 [2023-12-02 16:40:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:35,687 INFO L495 AbstractCegarLoop]: Abstraction has 58633 states and 73758 transitions. [2023-12-02 16:40:35,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 16:40:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 58633 states and 73758 transitions. [2023-12-02 16:40:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-12-02 16:40:35,701 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:35,702 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:35,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:40:35,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:40:35,903 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:35,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:35,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1378700410, now seen corresponding path program 1 times [2023-12-02 16:40:35,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:35,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508319407] [2023-12-02 16:40:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:35,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:40:36,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:36,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508319407] [2023-12-02 16:40:36,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508319407] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:36,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:36,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:40:36,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950139595] [2023-12-02 16:40:36,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:36,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:36,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:36,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:36,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:36,415 INFO L87 Difference]: Start difference. First operand 58633 states and 73758 transitions. Second operand has 4 states, 4 states have (on average 77.5) internal successors, (310), 3 states have internal predecessors, (310), 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 16:40:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:37,608 INFO L93 Difference]: Finished difference Result 125416 states and 157796 transitions. [2023-12-02 16:40:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:40:37,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 3 states have internal predecessors, (310), 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 310 [2023-12-02 16:40:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:37,670 INFO L225 Difference]: With dead ends: 125416 [2023-12-02 16:40:37,671 INFO L226 Difference]: Without dead ends: 66927 [2023-12-02 16:40:37,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:37,700 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 273 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:37,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 11 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 16:40:37,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66927 states. [2023-12-02 16:40:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66927 to 64639. [2023-12-02 16:40:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64639 states, 64638 states have (on average 1.2239704198768526) internal successors, (79115), 64638 states have internal predecessors, (79115), 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 16:40:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64639 states to 64639 states and 79115 transitions. [2023-12-02 16:40:38,625 INFO L78 Accepts]: Start accepts. Automaton has 64639 states and 79115 transitions. Word has length 310 [2023-12-02 16:40:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:38,626 INFO L495 AbstractCegarLoop]: Abstraction has 64639 states and 79115 transitions. [2023-12-02 16:40:38,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 3 states have internal predecessors, (310), 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 16:40:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 64639 states and 79115 transitions. [2023-12-02 16:40:38,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-12-02 16:40:38,642 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:38,642 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:38,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 16:40:38,642 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:38,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:38,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2096159392, now seen corresponding path program 1 times [2023-12-02 16:40:38,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:38,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117153650] [2023-12-02 16:40:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:38,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 16:40:39,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:39,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117153650] [2023-12-02 16:40:39,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117153650] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:39,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:39,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:40:39,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792387342] [2023-12-02 16:40:39,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:39,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:39,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:39,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:39,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:39,108 INFO L87 Difference]: Start difference. First operand 64639 states and 79115 transitions. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 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 16:40:40,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:40,310 INFO L93 Difference]: Finished difference Result 130993 states and 160266 transitions. [2023-12-02 16:40:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:40:40,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 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 338 [2023-12-02 16:40:40,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:40,364 INFO L225 Difference]: With dead ends: 130993 [2023-12-02 16:40:40,364 INFO L226 Difference]: Without dead ends: 66498 [2023-12-02 16:40:40,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:40,388 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 403 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:40,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 252 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 16:40:40,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66498 states. [2023-12-02 16:40:41,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66498 to 64925. [2023-12-02 16:40:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64925 states, 64924 states have (on average 1.2199186741420738) internal successors, (79202), 64924 states have internal predecessors, (79202), 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 16:40:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64925 states to 64925 states and 79202 transitions. [2023-12-02 16:40:41,190 INFO L78 Accepts]: Start accepts. Automaton has 64925 states and 79202 transitions. Word has length 338 [2023-12-02 16:40:41,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:41,190 INFO L495 AbstractCegarLoop]: Abstraction has 64925 states and 79202 transitions. [2023-12-02 16:40:41,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 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 16:40:41,190 INFO L276 IsEmpty]: Start isEmpty. Operand 64925 states and 79202 transitions. [2023-12-02 16:40:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2023-12-02 16:40:41,202 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:41,202 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:41,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 16:40:41,203 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:41,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:41,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1862063063, now seen corresponding path program 1 times [2023-12-02 16:40:41,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:41,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716888679] [2023-12-02 16:40:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:41,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:40:41,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716888679] [2023-12-02 16:40:41,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716888679] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:41,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:41,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:40:41,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287587598] [2023-12-02 16:40:41,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:41,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:41,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:41,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:41,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:41,862 INFO L87 Difference]: Start difference. First operand 64925 states and 79202 transitions. Second operand has 4 states, 4 states have (on average 84.25) internal successors, (337), 3 states have internal predecessors, (337), 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 16:40:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:42,964 INFO L93 Difference]: Finished difference Result 130421 states and 159220 transitions. [2023-12-02 16:40:42,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:40:42,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 3 states have internal predecessors, (337), 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 342 [2023-12-02 16:40:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:43,029 INFO L225 Difference]: With dead ends: 130421 [2023-12-02 16:40:43,030 INFO L226 Difference]: Without dead ends: 65640 [2023-12-02 16:40:43,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:43,062 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 162 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:43,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 11 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:40:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65640 states. [2023-12-02 16:40:43,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65640 to 64925. [2023-12-02 16:40:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64925 states, 64924 states have (on average 1.2136806111761445) internal successors, (78797), 64924 states have internal predecessors, (78797), 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 16:40:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64925 states to 64925 states and 78797 transitions. [2023-12-02 16:40:44,056 INFO L78 Accepts]: Start accepts. Automaton has 64925 states and 78797 transitions. Word has length 342 [2023-12-02 16:40:44,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:44,056 INFO L495 AbstractCegarLoop]: Abstraction has 64925 states and 78797 transitions. [2023-12-02 16:40:44,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 3 states have internal predecessors, (337), 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 16:40:44,056 INFO L276 IsEmpty]: Start isEmpty. Operand 64925 states and 78797 transitions. [2023-12-02 16:40:44,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2023-12-02 16:40:44,071 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:44,071 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:44,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 16:40:44,072 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:44,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:44,072 INFO L85 PathProgramCache]: Analyzing trace with hash -953493357, now seen corresponding path program 1 times [2023-12-02 16:40:44,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:44,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923225610] [2023-12-02 16:40:44,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:44,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 224 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:40:44,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923225610] [2023-12-02 16:40:44,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923225610] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:40:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892111920] [2023-12-02 16:40:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:44,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:40:44,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:40:44,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:40:44,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a97f8b-7181-4713-8874-77f23542813f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:40:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:45,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:40:45,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:40:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 224 proven. 103 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:40:45,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:40:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 224 proven. 103 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:40:45,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892111920] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:40:45,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [309315738] [2023-12-02 16:40:45,603 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2023-12-02 16:40:45,603 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:40:45,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:40:45,612 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:40:45,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:43:35,920 WARN L293 SmtUtils]: Spent 21.03s on a formula simplification that was a NOOP. DAG size: 874 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 16:43:56,924 WARN L293 SmtUtils]: Spent 21.00s on a formula simplification that was a NOOP. DAG size: 874 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 16:45:55,119 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2023-12-02 16:46:10,210 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2023-12-02 16:46:10,328 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2023-12-02 16:46:33,889 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2023-12-02 16:53:45,673 WARN L293 SmtUtils]: Spent 7.19m on a formula simplification that was a NOOP. DAG size: 3756 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)