./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire --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 96fefa83b30613ea39cc46bf8d68e79f92b274b671b8c94e773ac8e262712116 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:31:34,627 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:31:34,814 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:31:34,826 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:31:34,827 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:31:34,874 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:31:34,875 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:31:34,876 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:31:34,877 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:31:34,883 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:31:34,884 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:31:34,885 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:31:34,885 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:31:34,887 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:31:34,888 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:31:34,888 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:31:34,889 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:31:34,889 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:31:34,890 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:31:34,890 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:31:34,891 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:31:34,891 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:31:34,893 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:31:34,895 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:31:34,895 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:31:34,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:31:34,896 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:31:34,897 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:31:34,897 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:31:34,898 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:31:34,899 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:31:34,899 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:31:34,900 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:31:34,900 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:31:34,900 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:31:34,901 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:31:34,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:31:34,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:34,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:31:34,902 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:31:34,902 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:31:34,902 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:31:34,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:31:34,903 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:31:34,904 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:31:34,904 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:31:34,904 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:31:34,904 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_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96fefa83b30613ea39cc46bf8d68e79f92b274b671b8c94e773ac8e262712116 [2023-11-23 21:31:35,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:31:35,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:31:35,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:31:35,396 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:31:35,396 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:31:35,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-23 21:31:38,564 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:31:38,928 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:31:38,932 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-23 21:31:38,955 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/data/11cde8d1a/38b32ba473d5430aa2b28679742be852/FLAGaffb24083 [2023-11-23 21:31:38,980 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/data/11cde8d1a/38b32ba473d5430aa2b28679742be852 [2023-11-23 21:31:38,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:31:38,986 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:31:38,988 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:38,988 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:31:38,996 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:31:38,997 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:38" (1/1) ... [2023-11-23 21:31:38,998 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254d81be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:38, skipping insertion in model container [2023-11-23 21:31:38,999 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:38" (1/1) ... [2023-11-23 21:31:39,075 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:31:39,471 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_98aad6d1-ba5a-480e-8036-25e0bdc5527d/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2023-11-23 21:31:39,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:39,555 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:31:39,611 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_98aad6d1-ba5a-480e-8036-25e0bdc5527d/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2023-11-23 21:31:39,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:39,662 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:31:39,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39 WrapperNode [2023-11-23 21:31:39,663 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:39,664 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:39,664 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:31:39,664 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:31:39,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39" (1/1) ... [2023-11-23 21:31:39,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39" (1/1) ... [2023-11-23 21:31:39,754 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 624 [2023-11-23 21:31:39,760 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:39,761 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:31:39,761 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:31:39,762 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:31:39,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39" (1/1) ... [2023-11-23 21:31:39,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39" (1/1) ... [2023-11-23 21:31:39,777 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39" (1/1) ... [2023-11-23 21:31:39,778 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39" (1/1) ... [2023-11-23 21:31:39,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39" (1/1) ... [2023-11-23 21:31:39,821 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39" (1/1) ... [2023-11-23 21:31:39,824 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39" (1/1) ... [2023-11-23 21:31:39,827 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39" (1/1) ... [2023-11-23 21:31:39,833 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:31:39,834 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:31:39,848 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:31:39,848 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:31:39,849 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39" (1/1) ... [2023-11-23 21:31:39,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:39,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:39,933 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:31:40,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:31:40,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:31:40,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:31:40,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:31:40,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:31:40,206 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:31:40,209 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:31:40,910 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:31:41,255 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:31:41,255 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:31:41,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:41 BoogieIcfgContainer [2023-11-23 21:31:41,258 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:31:41,263 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:31:41,263 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:31:41,267 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:31:41,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:31:38" (1/3) ... [2023-11-23 21:31:41,269 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30aa04d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:41, skipping insertion in model container [2023-11-23 21:31:41,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:39" (2/3) ... [2023-11-23 21:31:41,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30aa04d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:41, skipping insertion in model container [2023-11-23 21:31:41,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:41" (3/3) ... [2023-11-23 21:31:41,277 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-23 21:31:41,301 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:31:41,301 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:31:41,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:31:41,384 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;@2d095c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:31:41,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:31:41,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 85 states have (on average 1.776470588235294) internal successors, (151), 92 states have internal predecessors, (151), 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) [2023-11-23 21:31:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 21:31:41,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:41,403 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] [2023-11-23 21:31:41,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:41,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:41,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1203894572, now seen corresponding path program 1 times [2023-11-23 21:31:41,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:41,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387240779] [2023-11-23 21:31:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:41,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:42,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:42,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387240779] [2023-11-23 21:31:42,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387240779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:42,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:42,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:42,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068856723] [2023-11-23 21:31:42,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:42,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:42,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:42,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:42,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:42,099 INFO L87 Difference]: Start difference. First operand has 93 states, 85 states have (on average 1.776470588235294) internal successors, (151), 92 states have internal predecessors, (151), 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 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-11-23 21:31:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:42,262 INFO L93 Difference]: Finished difference Result 209 states and 320 transitions. [2023-11-23 21:31:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:42,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2023-11-23 21:31:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:42,280 INFO L225 Difference]: With dead ends: 209 [2023-11-23 21:31:42,281 INFO L226 Difference]: Without dead ends: 129 [2023-11-23 21:31:42,285 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 [2023-11-23 21:31:42,290 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 93 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:42,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 325 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-23 21:31:42,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2023-11-23 21:31:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.4126984126984128) internal successors, (178), 126 states have internal predecessors, (178), 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) [2023-11-23 21:31:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 178 transitions. [2023-11-23 21:31:42,356 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 178 transitions. Word has length 38 [2023-11-23 21:31:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:42,357 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 178 transitions. [2023-11-23 21:31:42,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-11-23 21:31:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 178 transitions. [2023-11-23 21:31:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:31:42,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:42,360 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] [2023-11-23 21:31:42,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:31:42,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:42,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:42,361 INFO L85 PathProgramCache]: Analyzing trace with hash -193135057, now seen corresponding path program 1 times [2023-11-23 21:31:42,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:42,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399974652] [2023-11-23 21:31:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:42,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:42,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:42,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399974652] [2023-11-23 21:31:42,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399974652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:42,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:42,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:42,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015510738] [2023-11-23 21:31:42,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:42,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:42,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:42,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:42,526 INFO L87 Difference]: Start difference. First operand 127 states and 178 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-23 21:31:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:42,589 INFO L93 Difference]: Finished difference Result 282 states and 413 transitions. [2023-11-23 21:31:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:42,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2023-11-23 21:31:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:42,600 INFO L225 Difference]: With dead ends: 282 [2023-11-23 21:31:42,600 INFO L226 Difference]: Without dead ends: 184 [2023-11-23 21:31:42,601 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 [2023-11-23 21:31:42,603 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 77 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:42,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 184 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:31:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-23 21:31:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2023-11-23 21:31:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.430939226519337) internal successors, (259), 181 states have internal predecessors, (259), 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) [2023-11-23 21:31:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 259 transitions. [2023-11-23 21:31:42,640 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 259 transitions. Word has length 40 [2023-11-23 21:31:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:42,642 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 259 transitions. [2023-11-23 21:31:42,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-23 21:31:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 259 transitions. [2023-11-23 21:31:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 21:31:42,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:42,647 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] [2023-11-23 21:31:42,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:31:42,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:42,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:42,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1952602460, now seen corresponding path program 1 times [2023-11-23 21:31:42,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:42,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599442035] [2023-11-23 21:31:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:42,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:42,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:42,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599442035] [2023-11-23 21:31:42,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599442035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:42,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:42,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:42,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017092474] [2023-11-23 21:31:42,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:42,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:42,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:42,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:42,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:42,804 INFO L87 Difference]: Start difference. First operand 182 states and 259 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2023-11-23 21:31:42,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:42,849 INFO L93 Difference]: Finished difference Result 448 states and 658 transitions. [2023-11-23 21:31:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:42,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2023-11-23 21:31:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:42,854 INFO L225 Difference]: With dead ends: 448 [2023-11-23 21:31:42,854 INFO L226 Difference]: Without dead ends: 297 [2023-11-23 21:31:42,856 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 [2023-11-23 21:31:42,857 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 77 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:42,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 233 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:31:42,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-23 21:31:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2023-11-23 21:31:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.4489795918367347) internal successors, (426), 294 states have internal predecessors, (426), 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) [2023-11-23 21:31:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 426 transitions. [2023-11-23 21:31:42,910 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 426 transitions. Word has length 42 [2023-11-23 21:31:42,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:42,916 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 426 transitions. [2023-11-23 21:31:42,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2023-11-23 21:31:42,917 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 426 transitions. [2023-11-23 21:31:42,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 21:31:42,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:42,919 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] [2023-11-23 21:31:42,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:31:42,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:42,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash -129986801, now seen corresponding path program 1 times [2023-11-23 21:31:42,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:42,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549565310] [2023-11-23 21:31:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:42,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:43,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:43,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549565310] [2023-11-23 21:31:43,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549565310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:43,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:43,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:43,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274489590] [2023-11-23 21:31:43,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:43,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:43,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:43,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:43,097 INFO L87 Difference]: Start difference. First operand 295 states and 426 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-23 21:31:43,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:43,140 INFO L93 Difference]: Finished difference Result 723 states and 1068 transitions. [2023-11-23 21:31:43,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:43,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2023-11-23 21:31:43,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:43,147 INFO L225 Difference]: With dead ends: 723 [2023-11-23 21:31:43,148 INFO L226 Difference]: Without dead ends: 459 [2023-11-23 21:31:43,153 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 [2023-11-23 21:31:43,163 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:43,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 201 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:31:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-11-23 21:31:43,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2023-11-23 21:31:43,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.4671052631578947) internal successors, (669), 456 states have internal predecessors, (669), 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) [2023-11-23 21:31:43,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 669 transitions. [2023-11-23 21:31:43,209 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 669 transitions. Word has length 44 [2023-11-23 21:31:43,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:43,211 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 669 transitions. [2023-11-23 21:31:43,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-23 21:31:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 669 transitions. [2023-11-23 21:31:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:31:43,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:43,219 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] [2023-11-23 21:31:43,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:31:43,220 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:43,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash 305400130, now seen corresponding path program 1 times [2023-11-23 21:31:43,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:43,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385638770] [2023-11-23 21:31:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:43,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:43,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:43,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385638770] [2023-11-23 21:31:43,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385638770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:43,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:43,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:43,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924733623] [2023-11-23 21:31:43,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:43,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:43,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:43,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:43,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:43,365 INFO L87 Difference]: Start difference. First operand 457 states and 669 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-11-23 21:31:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:43,442 INFO L93 Difference]: Finished difference Result 1175 states and 1736 transitions. [2023-11-23 21:31:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:43,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 46 [2023-11-23 21:31:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:43,448 INFO L225 Difference]: With dead ends: 1175 [2023-11-23 21:31:43,448 INFO L226 Difference]: Without dead ends: 762 [2023-11-23 21:31:43,449 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 [2023-11-23 21:31:43,450 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 72 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:43,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 214 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2023-11-23 21:31:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 760. [2023-11-23 21:31:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 1.458498023715415) internal successors, (1107), 759 states have internal predecessors, (1107), 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) [2023-11-23 21:31:43,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1107 transitions. [2023-11-23 21:31:43,491 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1107 transitions. Word has length 46 [2023-11-23 21:31:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:43,492 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 1107 transitions. [2023-11-23 21:31:43,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-11-23 21:31:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1107 transitions. [2023-11-23 21:31:43,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 21:31:43,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:43,496 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] [2023-11-23 21:31:43,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:31:43,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:43,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:43,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1581532322, now seen corresponding path program 1 times [2023-11-23 21:31:43,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:43,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115371534] [2023-11-23 21:31:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:43,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:43,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:43,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115371534] [2023-11-23 21:31:43,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115371534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:43,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:43,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858453106] [2023-11-23 21:31:43,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:43,652 INFO L87 Difference]: Start difference. First operand 760 states and 1107 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-11-23 21:31:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:43,701 INFO L93 Difference]: Finished difference Result 1902 states and 2802 transitions. [2023-11-23 21:31:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2023-11-23 21:31:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:43,716 INFO L225 Difference]: With dead ends: 1902 [2023-11-23 21:31:43,716 INFO L226 Difference]: Without dead ends: 1186 [2023-11-23 21:31:43,718 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 [2023-11-23 21:31:43,720 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 71 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:43,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 203 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:31:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2023-11-23 21:31:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1184. [2023-11-23 21:31:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.466610312764159) internal successors, (1735), 1183 states have internal predecessors, (1735), 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) [2023-11-23 21:31:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1735 transitions. [2023-11-23 21:31:43,757 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1735 transitions. Word has length 48 [2023-11-23 21:31:43,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:43,757 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1735 transitions. [2023-11-23 21:31:43,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-11-23 21:31:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1735 transitions. [2023-11-23 21:31:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 21:31:43,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:43,760 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] [2023-11-23 21:31:43,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:31:43,761 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:43,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:43,761 INFO L85 PathProgramCache]: Analyzing trace with hash -256432369, now seen corresponding path program 1 times [2023-11-23 21:31:43,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:43,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057811576] [2023-11-23 21:31:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:43,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:43,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:43,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057811576] [2023-11-23 21:31:43,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057811576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:43,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:43,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:31:43,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703120255] [2023-11-23 21:31:43,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:43,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:31:43,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:43,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:31:43,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:43,909 INFO L87 Difference]: Start difference. First operand 1184 states and 1735 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2023-11-23 21:31:44,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:44,131 INFO L93 Difference]: Finished difference Result 3012 states and 4441 transitions. [2023-11-23 21:31:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:31:44,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 50 [2023-11-23 21:31:44,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:44,143 INFO L225 Difference]: With dead ends: 3012 [2023-11-23 21:31:44,143 INFO L226 Difference]: Without dead ends: 1867 [2023-11-23 21:31:44,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:31:44,146 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 439 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:44,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 811 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2023-11-23 21:31:44,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1841. [2023-11-23 21:31:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.4728260869565217) internal successors, (2710), 1840 states have internal predecessors, (2710), 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) [2023-11-23 21:31:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2710 transitions. [2023-11-23 21:31:44,198 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2710 transitions. Word has length 50 [2023-11-23 21:31:44,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:44,199 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2710 transitions. [2023-11-23 21:31:44,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2023-11-23 21:31:44,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2710 transitions. [2023-11-23 21:31:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 21:31:44,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:44,200 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] [2023-11-23 21:31:44,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:31:44,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:44,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:44,201 INFO L85 PathProgramCache]: Analyzing trace with hash 578026953, now seen corresponding path program 1 times [2023-11-23 21:31:44,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:44,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009465087] [2023-11-23 21:31:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:44,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:44,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:44,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009465087] [2023-11-23 21:31:44,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009465087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:44,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:44,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:31:44,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162512562] [2023-11-23 21:31:44,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:44,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:31:44,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:44,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:31:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:31:44,332 INFO L87 Difference]: Start difference. First operand 1841 states and 2710 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:44,420 INFO L93 Difference]: Finished difference Result 3627 states and 5352 transitions. [2023-11-23 21:31:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:31:44,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-23 21:31:44,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:44,432 INFO L225 Difference]: With dead ends: 3627 [2023-11-23 21:31:44,433 INFO L226 Difference]: Without dead ends: 1843 [2023-11-23 21:31:44,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:44,436 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 145 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:44,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 297 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:44,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2023-11-23 21:31:44,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1838. [2023-11-23 21:31:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 1.467065868263473) internal successors, (2695), 1837 states have internal predecessors, (2695), 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) [2023-11-23 21:31:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 2695 transitions. [2023-11-23 21:31:44,485 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 2695 transitions. Word has length 51 [2023-11-23 21:31:44,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:44,485 INFO L495 AbstractCegarLoop]: Abstraction has 1838 states and 2695 transitions. [2023-11-23 21:31:44,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 2695 transitions. [2023-11-23 21:31:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-23 21:31:44,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:44,487 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] [2023-11-23 21:31:44,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:31:44,488 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:44,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:44,488 INFO L85 PathProgramCache]: Analyzing trace with hash 416534526, now seen corresponding path program 1 times [2023-11-23 21:31:44,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:44,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222011819] [2023-11-23 21:31:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:44,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:44,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:44,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222011819] [2023-11-23 21:31:44,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222011819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:44,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:44,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:31:44,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331449121] [2023-11-23 21:31:44,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:44,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:31:44,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:44,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:31:44,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:44,872 INFO L87 Difference]: Start difference. First operand 1838 states and 2695 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2023-11-23 21:31:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:44,963 INFO L93 Difference]: Finished difference Result 3028 states and 4392 transitions. [2023-11-23 21:31:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:31:44,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 59 [2023-11-23 21:31:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:44,981 INFO L225 Difference]: With dead ends: 3028 [2023-11-23 21:31:44,981 INFO L226 Difference]: Without dead ends: 3026 [2023-11-23 21:31:44,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:31:44,983 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 148 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:44,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 576 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:44,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2023-11-23 21:31:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 1882. [2023-11-23 21:31:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 1.443912812333865) internal successors, (2716), 1881 states have internal predecessors, (2716), 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) [2023-11-23 21:31:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2716 transitions. [2023-11-23 21:31:45,047 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2716 transitions. Word has length 59 [2023-11-23 21:31:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:45,047 INFO L495 AbstractCegarLoop]: Abstraction has 1882 states and 2716 transitions. [2023-11-23 21:31:45,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2023-11-23 21:31:45,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2716 transitions. [2023-11-23 21:31:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 21:31:45,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:45,049 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] [2023-11-23 21:31:45,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:31:45,049 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:45,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:45,050 INFO L85 PathProgramCache]: Analyzing trace with hash 19052562, now seen corresponding path program 1 times [2023-11-23 21:31:45,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:45,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560644681] [2023-11-23 21:31:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:45,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:46,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:46,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560644681] [2023-11-23 21:31:46,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560644681] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:46,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246836352] [2023-11-23 21:31:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:46,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:46,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:46,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:46,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:31:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:46,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 21:31:46,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:31:48,473 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:48,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246836352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:48,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:31:48,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 19 [2023-11-23 21:31:48,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923168664] [2023-11-23 21:31:48,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:48,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:31:48,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:48,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:31:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:31:48,476 INFO L87 Difference]: Start difference. First operand 1882 states and 2716 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 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) [2023-11-23 21:31:48,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:48,969 INFO L93 Difference]: Finished difference Result 3767 states and 5443 transitions. [2023-11-23 21:31:48,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:31:48,970 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 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 67 [2023-11-23 21:31:48,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:48,982 INFO L225 Difference]: With dead ends: 3767 [2023-11-23 21:31:48,982 INFO L226 Difference]: Without dead ends: 1942 [2023-11-23 21:31:48,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:31:48,985 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 832 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:48,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 671 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:48,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2023-11-23 21:31:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1938. [2023-11-23 21:31:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 1.4419204956117708) internal successors, (2793), 1937 states have internal predecessors, (2793), 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) [2023-11-23 21:31:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2793 transitions. [2023-11-23 21:31:49,041 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2793 transitions. Word has length 67 [2023-11-23 21:31:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:49,041 INFO L495 AbstractCegarLoop]: Abstraction has 1938 states and 2793 transitions. [2023-11-23 21:31:49,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 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) [2023-11-23 21:31:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2793 transitions. [2023-11-23 21:31:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:31:49,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:49,043 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] [2023-11-23 21:31:49,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:49,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:31:49,274 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:49,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:49,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1112163948, now seen corresponding path program 1 times [2023-11-23 21:31:49,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:49,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238812030] [2023-11-23 21:31:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:49,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:50,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238812030] [2023-11-23 21:31:50,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238812030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854931717] [2023-11-23 21:31:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:50,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:50,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:50,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:50,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:31:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:51,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:31:51,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:31:51,792 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:51,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854931717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:51,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:31:51,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-23 21:31:51,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150709750] [2023-11-23 21:31:51,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:51,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:31:51,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:51,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:31:51,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:31:51,795 INFO L87 Difference]: Start difference. First operand 1938 states and 2793 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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) [2023-11-23 21:31:51,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:51,993 INFO L93 Difference]: Finished difference Result 6183 states and 8883 transitions. [2023-11-23 21:31:51,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:31:51,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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 70 [2023-11-23 21:31:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:52,022 INFO L225 Difference]: With dead ends: 6183 [2023-11-23 21:31:52,022 INFO L226 Difference]: Without dead ends: 4305 [2023-11-23 21:31:52,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:31:52,027 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 357 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:52,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 435 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:52,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2023-11-23 21:31:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 4123. [2023-11-23 21:31:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4123 states, 4122 states have (on average 1.4296458030082484) internal successors, (5893), 4122 states have internal predecessors, (5893), 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) [2023-11-23 21:31:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4123 states to 4123 states and 5893 transitions. [2023-11-23 21:31:52,156 INFO L78 Accepts]: Start accepts. Automaton has 4123 states and 5893 transitions. Word has length 70 [2023-11-23 21:31:52,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:52,156 INFO L495 AbstractCegarLoop]: Abstraction has 4123 states and 5893 transitions. [2023-11-23 21:31:52,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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) [2023-11-23 21:31:52,157 INFO L276 IsEmpty]: Start isEmpty. Operand 4123 states and 5893 transitions. [2023-11-23 21:31:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 21:31:52,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:52,159 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] [2023-11-23 21:31:52,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:52,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:31:52,373 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:52,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:52,373 INFO L85 PathProgramCache]: Analyzing trace with hash -627507191, now seen corresponding path program 1 times [2023-11-23 21:31:52,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:52,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046560984] [2023-11-23 21:31:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:52,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:31:52,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:52,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046560984] [2023-11-23 21:31:52,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046560984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:52,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:52,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:31:52,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355710508] [2023-11-23 21:31:52,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:52,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:31:52,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:52,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:31:52,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:52,568 INFO L87 Difference]: Start difference. First operand 4123 states and 5893 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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) [2023-11-23 21:31:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:52,671 INFO L93 Difference]: Finished difference Result 8211 states and 11748 transitions. [2023-11-23 21:31:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:31:52,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 73 [2023-11-23 21:31:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:52,706 INFO L225 Difference]: With dead ends: 8211 [2023-11-23 21:31:52,706 INFO L226 Difference]: Without dead ends: 4123 [2023-11-23 21:31:52,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:31:52,712 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 281 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:52,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 99 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2023-11-23 21:31:52,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 4123. [2023-11-23 21:31:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4123 states, 4122 states have (on average 1.3971373119844737) internal successors, (5759), 4122 states have internal predecessors, (5759), 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) [2023-11-23 21:31:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4123 states to 4123 states and 5759 transitions. [2023-11-23 21:31:52,822 INFO L78 Accepts]: Start accepts. Automaton has 4123 states and 5759 transitions. Word has length 73 [2023-11-23 21:31:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:52,822 INFO L495 AbstractCegarLoop]: Abstraction has 4123 states and 5759 transitions. [2023-11-23 21:31:52,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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) [2023-11-23 21:31:52,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4123 states and 5759 transitions. [2023-11-23 21:31:52,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 21:31:52,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:52,824 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] [2023-11-23 21:31:52,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 21:31:52,825 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:52,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:52,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1695052604, now seen corresponding path program 1 times [2023-11-23 21:31:52,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:52,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68507836] [2023-11-23 21:31:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:52,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:54,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:54,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68507836] [2023-11-23 21:31:54,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68507836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:54,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736902236] [2023-11-23 21:31:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:54,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:54,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:54,363 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:54,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:31:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:54,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 21:31:54,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:31:56,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:56,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736902236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:56,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:31:56,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 19 [2023-11-23 21:31:56,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067063537] [2023-11-23 21:31:56,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:56,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:31:56,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:56,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:31:56,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:31:56,355 INFO L87 Difference]: Start difference. First operand 4123 states and 5759 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 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) [2023-11-23 21:31:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:56,958 INFO L93 Difference]: Finished difference Result 8500 states and 11842 transitions. [2023-11-23 21:31:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:31:56,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 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 73 [2023-11-23 21:31:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:56,985 INFO L225 Difference]: With dead ends: 8500 [2023-11-23 21:31:56,985 INFO L226 Difference]: Without dead ends: 4467 [2023-11-23 21:31:56,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:31:56,993 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 822 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:56,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 812 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:31:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2023-11-23 21:31:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 4377. [2023-11-23 21:31:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 4376 states have (on average 1.3921389396709323) internal successors, (6092), 4376 states have internal predecessors, (6092), 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) [2023-11-23 21:31:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 6092 transitions. [2023-11-23 21:31:57,122 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 6092 transitions. Word has length 73 [2023-11-23 21:31:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:57,123 INFO L495 AbstractCegarLoop]: Abstraction has 4377 states and 6092 transitions. [2023-11-23 21:31:57,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 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) [2023-11-23 21:31:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 6092 transitions. [2023-11-23 21:31:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-23 21:31:57,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:57,126 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] [2023-11-23 21:31:57,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:57,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:57,341 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:57,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:57,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1768511472, now seen corresponding path program 1 times [2023-11-23 21:31:57,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:57,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068386726] [2023-11-23 21:31:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:57,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:58,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:58,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068386726] [2023-11-23 21:31:58,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068386726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:58,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732266404] [2023-11-23 21:31:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:58,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:58,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:58,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:58,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98aad6d1-ba5a-480e-8036-25e0bdc5527d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:31:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:59,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 21:31:59,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:59,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:32:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:32:03,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732266404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:32:03,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [315423375] [2023-11-23 21:32:03,155 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-11-23 21:32:03,156 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:32:03,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:32:03,167 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:32:03,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:32:04,998 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-11-23 21:32:14,337 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 262144 conjunctions. This might take some time...