./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ --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 fe9d78f75108492828570ec5eb222efdf0cf36e1ec4bcab23f2d45d29dbfe193 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:13:21,495 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:13:21,564 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:13:21,569 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:13:21,569 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:13:21,595 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:13:21,596 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:13:21,597 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:13:21,597 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:13:21,598 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:13:21,598 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:13:21,599 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:13:21,599 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:13:21,600 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:13:21,600 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:13:21,601 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:13:21,601 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:13:21,602 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:13:21,602 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:13:21,603 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:13:21,603 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:13:21,604 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:13:21,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:13:21,605 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:13:21,606 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:13:21,606 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:13:21,606 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:13:21,607 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:13:21,607 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:13:21,608 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:13:21,608 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:13:21,608 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:13:21,609 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:13:21,609 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:13:21,621 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:13:21,621 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:13:21,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:13:21,622 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:13:21,622 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:13:21,622 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:13:21,623 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:13:21,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:13:21,623 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:13:21,624 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:13:21,624 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:13:21,624 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_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe9d78f75108492828570ec5eb222efdf0cf36e1ec4bcab23f2d45d29dbfe193 [2023-11-19 04:13:21,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:13:21,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:13:21,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:13:21,915 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:13:21,915 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:13:21,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c [2023-11-19 04:13:24,979 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:13:25,268 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:13:25,268 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c [2023-11-19 04:13:25,291 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/data/4deea955a/ccf241794f9d4e4e8c5241f7fe0169fe/FLAG524e04454 [2023-11-19 04:13:25,307 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/data/4deea955a/ccf241794f9d4e4e8c5241f7fe0169fe [2023-11-19 04:13:25,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:13:25,312 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:13:25,313 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:13:25,313 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:13:25,319 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:13:25,320 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:25,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44399197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25, skipping insertion in model container [2023-11-19 04:13:25,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:25,387 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:13:25,783 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_3b1aa877-e463-429f-aea4-9f8233dc2449/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c[30996,31009] [2023-11-19 04:13:25,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:13:25,801 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:13:25,908 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_3b1aa877-e463-429f-aea4-9f8233dc2449/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c[30996,31009] [2023-11-19 04:13:25,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:13:25,928 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:13:25,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25 WrapperNode [2023-11-19 04:13:25,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:13:25,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:13:25,930 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:13:25,930 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:13:25,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:25,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:26,037 INFO L138 Inliner]: procedures = 23, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 1002 [2023-11-19 04:13:26,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:13:26,038 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:13:26,038 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:13:26,038 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:13:26,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:26,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:26,060 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:26,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:26,100 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:26,141 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:26,146 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:26,152 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:26,176 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:13:26,177 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:13:26,178 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:13:26,178 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:13:26,179 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25" (1/1) ... [2023-11-19 04:13:26,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:13:26,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:26,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:13:26,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:13:26,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:13:26,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:13:26,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:13:26,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:13:26,443 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:13:26,445 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:13:27,564 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:13:28,946 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:13:28,947 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:13:28,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:13:28 BoogieIcfgContainer [2023-11-19 04:13:28,960 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:13:28,966 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:13:28,967 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:13:28,970 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:13:28,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:13:25" (1/3) ... [2023-11-19 04:13:28,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460f9127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:13:28, skipping insertion in model container [2023-11-19 04:13:28,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:25" (2/3) ... [2023-11-19 04:13:28,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460f9127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:13:28, skipping insertion in model container [2023-11-19 04:13:28,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:13:28" (3/3) ... [2023-11-19 04:13:28,976 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c [2023-11-19 04:13:28,997 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:13:28,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:13:29,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:13:29,078 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;@3c4e39d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:13:29,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:13:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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) [2023-11-19 04:13:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 04:13:29,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:29,103 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] [2023-11-19 04:13:29,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:29,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:29,112 INFO L85 PathProgramCache]: Analyzing trace with hash 832426143, now seen corresponding path program 1 times [2023-11-19 04:13:29,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:29,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072452932] [2023-11-19 04:13:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:29,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:34,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:34,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072452932] [2023-11-19 04:13:34,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072452932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:34,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:34,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:34,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572209395] [2023-11-19 04:13:34,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:34,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:13:34,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:34,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:13:34,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:34,457 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-19 04:13:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:34,749 INFO L93 Difference]: Finished difference Result 180 states and 288 transitions. [2023-11-19 04:13:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:13:34,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2023-11-19 04:13:34,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:34,765 INFO L225 Difference]: With dead ends: 180 [2023-11-19 04:13:34,765 INFO L226 Difference]: Without dead ends: 158 [2023-11-19 04:13:34,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:34,772 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 29 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:34,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 372 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:13:34,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-19 04:13:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2023-11-19 04:13:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 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) [2023-11-19 04:13:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2023-11-19 04:13:34,820 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2023-11-19 04:13:34,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:34,821 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2023-11-19 04:13:34,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-19 04:13:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2023-11-19 04:13:34,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 04:13:34,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:34,824 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] [2023-11-19 04:13:34,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:13:34,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:34,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:34,826 INFO L85 PathProgramCache]: Analyzing trace with hash -32739292, now seen corresponding path program 1 times [2023-11-19 04:13:34,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:34,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910448149] [2023-11-19 04:13:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:34,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:37,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:37,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910448149] [2023-11-19 04:13:37,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910448149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:37,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:37,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:37,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142524615] [2023-11-19 04:13:37,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:37,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:13:37,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:13:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:37,468 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2023-11-19 04:13:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:37,646 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2023-11-19 04:13:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:13:37,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 55 [2023-11-19 04:13:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:37,649 INFO L225 Difference]: With dead ends: 180 [2023-11-19 04:13:37,649 INFO L226 Difference]: Without dead ends: 160 [2023-11-19 04:13:37,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:37,651 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 24 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:37,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:13:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-19 04:13:37,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-11-19 04:13:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 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) [2023-11-19 04:13:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2023-11-19 04:13:37,666 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2023-11-19 04:13:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:37,667 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2023-11-19 04:13:37,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2023-11-19 04:13:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2023-11-19 04:13:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 04:13:37,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:37,670 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] [2023-11-19 04:13:37,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:13:37,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:37,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:37,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1077612248, now seen corresponding path program 1 times [2023-11-19 04:13:37,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:37,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400082933] [2023-11-19 04:13:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:37,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:40,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:40,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400082933] [2023-11-19 04:13:40,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400082933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:40,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:40,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:40,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337071172] [2023-11-19 04:13:40,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:40,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:13:40,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:40,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:13:40,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:40,224 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2023-11-19 04:13:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:40,374 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2023-11-19 04:13:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:13:40,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2023-11-19 04:13:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:40,380 INFO L225 Difference]: With dead ends: 180 [2023-11-19 04:13:40,380 INFO L226 Difference]: Without dead ends: 160 [2023-11-19 04:13:40,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:40,388 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:40,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 384 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:13:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-19 04:13:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-11-19 04:13:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 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) [2023-11-19 04:13:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2023-11-19 04:13:40,409 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2023-11-19 04:13:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:40,410 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2023-11-19 04:13:40,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2023-11-19 04:13:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2023-11-19 04:13:40,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-19 04:13:40,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:40,419 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] [2023-11-19 04:13:40,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:13:40,420 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:40,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:40,422 INFO L85 PathProgramCache]: Analyzing trace with hash 896516237, now seen corresponding path program 1 times [2023-11-19 04:13:40,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:40,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430199626] [2023-11-19 04:13:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:40,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:42,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430199626] [2023-11-19 04:13:42,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430199626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:42,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:42,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:42,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982866015] [2023-11-19 04:13:42,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:42,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:13:42,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:42,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:13:42,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:42,692 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-19 04:13:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:42,863 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2023-11-19 04:13:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:13:42,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2023-11-19 04:13:42,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:42,866 INFO L225 Difference]: With dead ends: 180 [2023-11-19 04:13:42,866 INFO L226 Difference]: Without dead ends: 160 [2023-11-19 04:13:42,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:42,867 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 20 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:42,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:13:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-19 04:13:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-11-19 04:13:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 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) [2023-11-19 04:13:42,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2023-11-19 04:13:42,879 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2023-11-19 04:13:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:42,879 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2023-11-19 04:13:42,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-19 04:13:42,880 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2023-11-19 04:13:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-19 04:13:42,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:42,882 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] [2023-11-19 04:13:42,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:13:42,883 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:42,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:42,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1970408881, now seen corresponding path program 1 times [2023-11-19 04:13:42,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:42,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333948706] [2023-11-19 04:13:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:42,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:45,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:45,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333948706] [2023-11-19 04:13:45,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333948706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:45,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:45,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:45,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021990230] [2023-11-19 04:13:45,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:45,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:13:45,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:45,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:13:45,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:45,126 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-11-19 04:13:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:45,313 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2023-11-19 04:13:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:13:45,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2023-11-19 04:13:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:45,315 INFO L225 Difference]: With dead ends: 180 [2023-11-19 04:13:45,316 INFO L226 Difference]: Without dead ends: 160 [2023-11-19 04:13:45,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:45,317 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 18 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:45,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:13:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-19 04:13:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-11-19 04:13:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 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) [2023-11-19 04:13:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2023-11-19 04:13:45,332 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2023-11-19 04:13:45,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:45,333 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2023-11-19 04:13:45,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-11-19 04:13:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2023-11-19 04:13:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-19 04:13:45,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:45,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:45,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:13:45,340 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:45,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1993100711, now seen corresponding path program 1 times [2023-11-19 04:13:45,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:45,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387824901] [2023-11-19 04:13:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:45,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:48,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:48,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387824901] [2023-11-19 04:13:48,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387824901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:48,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:48,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:48,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089318651] [2023-11-19 04:13:48,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:48,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:13:48,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:48,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:13:48,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:48,579 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-11-19 04:13:48,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:48,740 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2023-11-19 04:13:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:13:48,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 60 [2023-11-19 04:13:48,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:48,742 INFO L225 Difference]: With dead ends: 178 [2023-11-19 04:13:48,743 INFO L226 Difference]: Without dead ends: 158 [2023-11-19 04:13:48,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:48,744 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:48,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 377 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:13:48,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-19 04:13:48,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2023-11-19 04:13:48,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 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) [2023-11-19 04:13:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2023-11-19 04:13:48,754 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2023-11-19 04:13:48,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:48,754 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2023-11-19 04:13:48,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-11-19 04:13:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2023-11-19 04:13:48,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 04:13:48,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:48,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:48,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:13:48,756 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:48,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:48,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1744566652, now seen corresponding path program 1 times [2023-11-19 04:13:48,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:48,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123520103] [2023-11-19 04:13:48,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:48,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:50,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:50,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123520103] [2023-11-19 04:13:50,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123520103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:50,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:50,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:50,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536833208] [2023-11-19 04:13:50,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:50,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:13:50,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:50,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:13:50,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:50,926 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:51,047 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2023-11-19 04:13:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:13:51,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-19 04:13:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:51,049 INFO L225 Difference]: With dead ends: 179 [2023-11-19 04:13:51,049 INFO L226 Difference]: Without dead ends: 159 [2023-11-19 04:13:51,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:51,051 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 12 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:51,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 389 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:13:51,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-19 04:13:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2023-11-19 04:13:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 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) [2023-11-19 04:13:51,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2023-11-19 04:13:51,058 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2023-11-19 04:13:51,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:51,058 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2023-11-19 04:13:51,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2023-11-19 04:13:51,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 04:13:51,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:51,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:51,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:13:51,060 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:51,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash 20570282, now seen corresponding path program 1 times [2023-11-19 04:13:51,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:51,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317909207] [2023-11-19 04:13:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:51,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:53,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:53,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317909207] [2023-11-19 04:13:53,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317909207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:53,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:53,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:53,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874969099] [2023-11-19 04:13:53,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:53,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:13:53,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:53,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:13:53,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:53,701 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2023-11-19 04:13:53,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:53,868 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2023-11-19 04:13:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:13:53,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2023-11-19 04:13:53,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:53,870 INFO L225 Difference]: With dead ends: 179 [2023-11-19 04:13:53,870 INFO L226 Difference]: Without dead ends: 159 [2023-11-19 04:13:53,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:53,872 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 7 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:53,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 554 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:13:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-19 04:13:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2023-11-19 04:13:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 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) [2023-11-19 04:13:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2023-11-19 04:13:53,878 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2023-11-19 04:13:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:53,879 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2023-11-19 04:13:53,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2023-11-19 04:13:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2023-11-19 04:13:53,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-19 04:13:53,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:53,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:53,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:13:53,881 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:53,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:53,881 INFO L85 PathProgramCache]: Analyzing trace with hash 630395806, now seen corresponding path program 1 times [2023-11-19 04:13:53,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:53,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946016508] [2023-11-19 04:13:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:53,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:54,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:54,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946016508] [2023-11-19 04:13:54,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946016508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:54,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:54,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:13:54,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792293750] [2023-11-19 04:13:54,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:54,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:13:54,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:54,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:13:54,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:13:54,295 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2023-11-19 04:13:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:54,473 INFO L93 Difference]: Finished difference Result 182 states and 280 transitions. [2023-11-19 04:13:54,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:13:54,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 64 [2023-11-19 04:13:54,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:54,475 INFO L225 Difference]: With dead ends: 182 [2023-11-19 04:13:54,475 INFO L226 Difference]: Without dead ends: 162 [2023-11-19 04:13:54,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:13:54,476 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 12 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:54,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 748 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:13:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-19 04:13:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2023-11-19 04:13:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 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) [2023-11-19 04:13:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2023-11-19 04:13:54,482 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2023-11-19 04:13:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:54,483 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2023-11-19 04:13:54,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2023-11-19 04:13:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2023-11-19 04:13:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 04:13:54,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:54,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:54,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:13:54,485 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:54,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:54,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1359893354, now seen corresponding path program 1 times [2023-11-19 04:13:54,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:54,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237168320] [2023-11-19 04:13:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:54,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:00,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:00,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237168320] [2023-11-19 04:14:00,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237168320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:00,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856982940] [2023-11-19 04:14:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:00,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:00,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:00,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:00,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b1aa877-e463-429f-aea4-9f8233dc2449/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:14:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:00,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 04:14:00,581 INFO L285 TraceCheckSpWp]: Computing forward predicates...