./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91 --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 34327c45f5bb67454914f640ebf6bf1380406f6d81b1c1440537dbf8cffc8ffd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:50:40,479 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:50:40,574 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:50:40,580 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:50:40,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:50:40,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:50:40,619 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:50:40,620 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:50:40,621 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:50:40,626 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:50:40,626 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:50:40,627 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:50:40,628 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:50:40,629 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:50:40,630 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:50:40,630 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:50:40,631 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:50:40,631 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:50:40,632 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:50:40,633 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:50:40,634 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:50:40,634 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:50:40,635 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:50:40,636 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:50:40,636 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:50:40,637 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:50:40,637 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:50:40,637 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:50:40,638 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:50:40,638 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:50:40,640 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:50:40,640 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:50:40,640 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:50:40,640 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:50:40,641 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:50:40,641 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:50:40,641 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:50:40,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:50:40,642 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:50:40,642 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:50:40,643 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:50:40,643 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:50:40,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:50:40,644 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:50:40,644 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:50:40,644 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:50:40,645 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:50:40,645 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_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34327c45f5bb67454914f640ebf6bf1380406f6d81b1c1440537dbf8cffc8ffd [2023-11-24 23:50:40,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:50:40,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:50:40,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:50:40,925 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:50:40,925 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:50:40,926 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c [2023-11-24 23:50:44,099 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:50:44,545 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:50:44,545 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c [2023-11-24 23:50:44,567 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/data/710a7a2e3/67aa0e992ef8429db51106161041a103/FLAGf0f1c2dca [2023-11-24 23:50:44,581 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/data/710a7a2e3/67aa0e992ef8429db51106161041a103 [2023-11-24 23:50:44,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:50:44,586 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:50:44,587 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:50:44,587 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:50:44,593 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:50:44,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:50:44" (1/1) ... [2023-11-24 23:50:44,595 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3156c7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:44, skipping insertion in model container [2023-11-24 23:50:44,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:50:44" (1/1) ... [2023-11-24 23:50:44,669 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:50:45,194 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_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c[65471,65484] [2023-11-24 23:50:45,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:50:45,219 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:50:45,394 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_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c[65471,65484] [2023-11-24 23:50:45,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:50:45,418 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:50:45,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45 WrapperNode [2023-11-24 23:50:45,419 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:50:45,420 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:50:45,420 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:50:45,420 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:50:45,427 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45" (1/1) ... [2023-11-24 23:50:45,454 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45" (1/1) ... [2023-11-24 23:50:45,585 INFO L138 Inliner]: procedures = 24, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 2110 [2023-11-24 23:50:45,585 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:50:45,586 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:50:45,586 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:50:45,586 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:50:45,596 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45" (1/1) ... [2023-11-24 23:50:45,596 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45" (1/1) ... [2023-11-24 23:50:45,602 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45" (1/1) ... [2023-11-24 23:50:45,607 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45" (1/1) ... [2023-11-24 23:50:45,660 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45" (1/1) ... [2023-11-24 23:50:45,718 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45" (1/1) ... [2023-11-24 23:50:45,724 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45" (1/1) ... [2023-11-24 23:50:45,734 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45" (1/1) ... [2023-11-24 23:50:45,744 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:50:45,745 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:50:45,745 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:50:45,746 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:50:45,746 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45" (1/1) ... [2023-11-24 23:50:45,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:50:45,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:45,779 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:50:45,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602fdbfe-1e6c-4f7b-b8ef-081a729a72a8/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:50:45,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:50:45,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:50:45,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:50:45,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:50:46,035 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:50:46,037 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:50:48,019 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:50:50,169 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:50:50,174 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:50:50,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:50:50 BoogieIcfgContainer [2023-11-24 23:50:50,176 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:50:50,179 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:50:50,180 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:50:50,183 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:50:50,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:50:44" (1/3) ... [2023-11-24 23:50:50,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8729b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:50:50, skipping insertion in model container [2023-11-24 23:50:50,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:45" (2/3) ... [2023-11-24 23:50:50,186 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8729b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:50:50, skipping insertion in model container [2023-11-24 23:50:50,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:50:50" (3/3) ... [2023-11-24 23:50:50,188 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c [2023-11-24 23:50:50,208 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:50:50,208 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:50:50,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:50:50,299 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;@c1329ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:50:50,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:50:50,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 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) [2023-11-24 23:50:50,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-24 23:50:50,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:50,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:50,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:50,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:50,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1696199277, now seen corresponding path program 1 times [2023-11-24 23:50:50,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:50,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72023661] [2023-11-24 23:50:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:50,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:00,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:00,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72023661] [2023-11-24 23:51:00,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72023661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:00,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:00,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:51:00,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900598834] [2023-11-24 23:51:00,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:00,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:00,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:00,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:00,757 INFO L87 Difference]: Start difference. First operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 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 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2023-11-24 23:51:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:01,295 INFO L93 Difference]: Finished difference Result 483 states and 822 transitions. [2023-11-24 23:51:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:51:01,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 126 [2023-11-24 23:51:01,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:01,325 INFO L225 Difference]: With dead ends: 483 [2023-11-24 23:51:01,327 INFO L226 Difference]: Without dead ends: 460 [2023-11-24 23:51:01,331 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 [2023-11-24 23:51:01,336 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 31 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:01,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1356 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:51:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-11-24 23:51:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450. [2023-11-24 23:51:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.712694877505568) internal successors, (769), 449 states have internal predecessors, (769), 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) [2023-11-24 23:51:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 769 transitions. [2023-11-24 23:51:01,425 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 769 transitions. Word has length 126 [2023-11-24 23:51:01,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:01,427 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 769 transitions. [2023-11-24 23:51:01,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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) [2023-11-24 23:51:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 769 transitions. [2023-11-24 23:51:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-24 23:51:01,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:01,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:01,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:51:01,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:51:01,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:01,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1116312629, now seen corresponding path program 1 times [2023-11-24 23:51:01,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:01,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910105650] [2023-11-24 23:51:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:01,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:06,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:06,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910105650] [2023-11-24 23:51:06,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910105650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:06,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:06,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:51:06,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314373116] [2023-11-24 23:51:06,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:06,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:06,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:06,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:06,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:06,836 INFO L87 Difference]: Start difference. First operand 450 states and 769 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2023-11-24 23:51:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:07,238 INFO L93 Difference]: Finished difference Result 483 states and 819 transitions. [2023-11-24 23:51:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:51:07,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 127 [2023-11-24 23:51:07,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:07,243 INFO L225 Difference]: With dead ends: 483 [2023-11-24 23:51:07,243 INFO L226 Difference]: Without dead ends: 462 [2023-11-24 23:51:07,244 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 [2023-11-24 23:51:07,247 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 26 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:07,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2034 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:51:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-24 23:51:07,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2023-11-24 23:51:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.710467706013363) internal successors, (768), 449 states have internal predecessors, (768), 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) [2023-11-24 23:51:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 768 transitions. [2023-11-24 23:51:07,280 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 768 transitions. Word has length 127 [2023-11-24 23:51:07,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:07,281 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 768 transitions. [2023-11-24 23:51:07,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2023-11-24 23:51:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 768 transitions. [2023-11-24 23:51:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-24 23:51:07,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:07,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:07,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:51:07,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:51:07,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:07,285 INFO L85 PathProgramCache]: Analyzing trace with hash -314243972, now seen corresponding path program 1 times [2023-11-24 23:51:07,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:07,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255807698] [2023-11-24 23:51:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:07,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:11,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:11,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255807698] [2023-11-24 23:51:11,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255807698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:11,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:11,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:51:11,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334000091] [2023-11-24 23:51:11,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:11,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:11,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:11,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:11,832 INFO L87 Difference]: Start difference. First operand 450 states and 768 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2023-11-24 23:51:12,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:12,196 INFO L93 Difference]: Finished difference Result 483 states and 818 transitions. [2023-11-24 23:51:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:51:12,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 128 [2023-11-24 23:51:12,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:12,201 INFO L225 Difference]: With dead ends: 483 [2023-11-24 23:51:12,201 INFO L226 Difference]: Without dead ends: 462 [2023-11-24 23:51:12,202 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 [2023-11-24 23:51:12,203 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 24 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:12,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2034 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:51:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-24 23:51:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2023-11-24 23:51:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7082405345211582) internal successors, (767), 449 states have internal predecessors, (767), 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) [2023-11-24 23:51:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 767 transitions. [2023-11-24 23:51:12,219 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 767 transitions. Word has length 128 [2023-11-24 23:51:12,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:12,220 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 767 transitions. [2023-11-24 23:51:12,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2023-11-24 23:51:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 767 transitions. [2023-11-24 23:51:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-24 23:51:12,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:12,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:12,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:51:12,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:51:12,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:12,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1214467628, now seen corresponding path program 1 times [2023-11-24 23:51:12,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:12,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397934241] [2023-11-24 23:51:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:12,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:16,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:16,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397934241] [2023-11-24 23:51:16,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397934241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:16,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:16,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:51:16,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450294802] [2023-11-24 23:51:16,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:16,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:16,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:16,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:16,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:16,408 INFO L87 Difference]: Start difference. First operand 450 states and 767 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:16,777 INFO L93 Difference]: Finished difference Result 483 states and 817 transitions. [2023-11-24 23:51:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:51:16,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2023-11-24 23:51:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:16,781 INFO L225 Difference]: With dead ends: 483 [2023-11-24 23:51:16,781 INFO L226 Difference]: Without dead ends: 462 [2023-11-24 23:51:16,782 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 [2023-11-24 23:51:16,788 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 22 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:16,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2034 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:51:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-24 23:51:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2023-11-24 23:51:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7060133630289531) internal successors, (766), 449 states have internal predecessors, (766), 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) [2023-11-24 23:51:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 766 transitions. [2023-11-24 23:51:16,805 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 766 transitions. Word has length 129 [2023-11-24 23:51:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:16,806 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 766 transitions. [2023-11-24 23:51:16,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 766 transitions. [2023-11-24 23:51:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-24 23:51:16,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:16,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:16,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:51:16,813 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:51:16,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:16,814 INFO L85 PathProgramCache]: Analyzing trace with hash 948821861, now seen corresponding path program 1 times [2023-11-24 23:51:16,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:16,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020104529] [2023-11-24 23:51:16,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:16,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:21,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:21,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020104529] [2023-11-24 23:51:21,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020104529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:21,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:21,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:51:21,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418686910] [2023-11-24 23:51:21,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:21,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:21,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:21,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:21,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:21,109 INFO L87 Difference]: Start difference. First operand 450 states and 766 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2023-11-24 23:51:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:21,475 INFO L93 Difference]: Finished difference Result 483 states and 816 transitions. [2023-11-24 23:51:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:51:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 130 [2023-11-24 23:51:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:21,479 INFO L225 Difference]: With dead ends: 483 [2023-11-24 23:51:21,479 INFO L226 Difference]: Without dead ends: 462 [2023-11-24 23:51:21,479 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 [2023-11-24 23:51:21,480 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 20 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:21,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2034 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:51:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-24 23:51:21,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2023-11-24 23:51:21,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7037861915367483) internal successors, (765), 449 states have internal predecessors, (765), 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) [2023-11-24 23:51:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 765 transitions. [2023-11-24 23:51:21,494 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 765 transitions. Word has length 130 [2023-11-24 23:51:21,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:21,495 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 765 transitions. [2023-11-24 23:51:21,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2023-11-24 23:51:21,495 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 765 transitions. [2023-11-24 23:51:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-24 23:51:21,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:21,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:21,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:51:21,498 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:51:21,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:21,499 INFO L85 PathProgramCache]: Analyzing trace with hash -703228963, now seen corresponding path program 1 times [2023-11-24 23:51:21,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:21,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958017774] [2023-11-24 23:51:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:21,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:25,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:25,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958017774] [2023-11-24 23:51:25,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958017774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:25,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:25,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:51:25,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305866917] [2023-11-24 23:51:25,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:25,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:25,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:25,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:25,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:25,196 INFO L87 Difference]: Start difference. First operand 450 states and 765 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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) [2023-11-24 23:51:25,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:25,497 INFO L93 Difference]: Finished difference Result 483 states and 815 transitions. [2023-11-24 23:51:25,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:51:25,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 131 [2023-11-24 23:51:25,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:25,501 INFO L225 Difference]: With dead ends: 483 [2023-11-24 23:51:25,501 INFO L226 Difference]: Without dead ends: 462 [2023-11-24 23:51:25,502 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 [2023-11-24 23:51:25,503 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 18 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:25,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1371 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:51:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-24 23:51:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2023-11-24 23:51:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 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) [2023-11-24 23:51:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions. [2023-11-24 23:51:25,518 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 131 [2023-11-24 23:51:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:25,518 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 764 transitions. [2023-11-24 23:51:25,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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) [2023-11-24 23:51:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions. [2023-11-24 23:51:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-24 23:51:25,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:25,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:25,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:51:25,522 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:51:25,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:25,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1321704965, now seen corresponding path program 1 times [2023-11-24 23:51:25,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:25,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464612961] [2023-11-24 23:51:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:25,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat