./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.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_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/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_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/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_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/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 453217a894ab839ac749d51e6f81154421ad61236b47a16877fbef21d8ae30a8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:03:54,375 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:03:54,493 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:03:54,504 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:03:54,505 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:03:54,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:03:54,545 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:03:54,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:03:54,547 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:03:54,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:03:54,553 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:03:54,554 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:03:54,555 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:03:54,556 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:03:54,557 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:03:54,557 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:03:54,558 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:03:54,558 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:03:54,559 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:03:54,559 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:03:54,560 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:03:54,561 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:03:54,562 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:03:54,562 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:03:54,563 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:03:54,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:03:54,564 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:03:54,564 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:03:54,565 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:03:54,565 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:03:54,567 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:03:54,598 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:03:54,599 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:03:54,599 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:03:54,599 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:03:54,600 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:03:54,600 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:03:54,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:54,601 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:03:54,601 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:03:54,601 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:03:54,602 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:03:54,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:03:54,602 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:03:54,603 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:03:54,603 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:03:54,603 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:03:54,603 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_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 453217a894ab839ac749d51e6f81154421ad61236b47a16877fbef21d8ae30a8 [2023-11-25 00:03:54,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:03:54,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:03:54,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:03:54,969 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:03:54,970 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:03:54,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-11-25 00:03:58,021 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:03:58,369 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:03:58,369 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-11-25 00:03:58,382 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/bin/utaipan-verify-SwPr7d2a91/data/b82da0677/d231571bb5be493e9ef93f0a6c429f16/FLAGc952d686f [2023-11-25 00:03:58,416 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/bin/utaipan-verify-SwPr7d2a91/data/b82da0677/d231571bb5be493e9ef93f0a6c429f16 [2023-11-25 00:03:58,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:03:58,420 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:03:58,422 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:58,422 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:03:58,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:03:58,428 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:58" (1/1) ... [2023-11-25 00:03:58,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ada2fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:58, skipping insertion in model container [2023-11-25 00:03:58,429 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:58" (1/1) ... [2023-11-25 00:03:58,478 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:03:58,712 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_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2023-11-25 00:03:58,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:58,833 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:03:58,930 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_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2023-11-25 00:03:58,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:59,007 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:03:59,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59 WrapperNode [2023-11-25 00:03:59,008 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:59,009 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:59,009 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:03:59,009 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:03:59,043 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59" (1/1) ... [2023-11-25 00:03:59,060 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59" (1/1) ... [2023-11-25 00:03:59,124 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 702 [2023-11-25 00:03:59,125 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:59,125 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:03:59,125 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:03:59,125 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:03:59,140 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59" (1/1) ... [2023-11-25 00:03:59,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59" (1/1) ... [2023-11-25 00:03:59,147 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59" (1/1) ... [2023-11-25 00:03:59,147 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59" (1/1) ... [2023-11-25 00:03:59,161 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59" (1/1) ... [2023-11-25 00:03:59,168 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59" (1/1) ... [2023-11-25 00:03:59,173 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59" (1/1) ... [2023-11-25 00:03:59,176 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59" (1/1) ... [2023-11-25 00:03:59,186 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:03:59,187 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:03:59,188 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:03:59,188 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:03:59,189 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59" (1/1) ... [2023-11-25 00:03:59,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:59,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:59,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:03:59,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfb27164-2b40-402a-ad6d-1eca5c1b8f6c/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:03:59,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:03:59,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:03:59,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:03:59,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:03:59,415 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:03:59,418 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:04:00,174 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:04:00,474 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:04:00,474 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-25 00:04:00,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:04:00 BoogieIcfgContainer [2023-11-25 00:04:00,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:04:00,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:04:00,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:04:00,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:04:00,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:03:58" (1/3) ... [2023-11-25 00:04:00,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5a48dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:04:00, skipping insertion in model container [2023-11-25 00:04:00,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:59" (2/3) ... [2023-11-25 00:04:00,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5a48dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:04:00, skipping insertion in model container [2023-11-25 00:04:00,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:04:00" (3/3) ... [2023-11-25 00:04:00,490 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-11-25 00:04:00,531 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:04:00,531 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:04:00,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:04:00,610 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;@3ba2e195, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:04:00,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:04:00,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 123 states have (on average 1.7073170731707317) internal successors, (210), 124 states have internal predecessors, (210), 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) [2023-11-25 00:04:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-25 00:04:00,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:00,628 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] [2023-11-25 00:04:00,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:00,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash 253097170, now seen corresponding path program 1 times [2023-11-25 00:04:00,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:00,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602884374] [2023-11-25 00:04:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:01,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:01,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602884374] [2023-11-25 00:04:01,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602884374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:01,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:01,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:04:01,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929738908] [2023-11-25 00:04:01,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:01,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:04:01,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:01,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:04:01,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:04:01,480 INFO L87 Difference]: Start difference. First operand has 125 states, 123 states have (on average 1.7073170731707317) internal successors, (210), 124 states have internal predecessors, (210), 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 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:01,844 INFO L93 Difference]: Finished difference Result 382 states and 611 transitions. [2023-11-25 00:04:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:04:01,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-25 00:04:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:01,863 INFO L225 Difference]: With dead ends: 382 [2023-11-25 00:04:01,863 INFO L226 Difference]: Without dead ends: 305 [2023-11-25 00:04:01,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:04:01,870 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 681 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:01,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 669 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:04:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-25 00:04:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 299. [2023-11-25 00:04:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.3724832214765101) internal successors, (409), 298 states have internal predecessors, (409), 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) [2023-11-25 00:04:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 409 transitions. [2023-11-25 00:04:01,957 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 409 transitions. Word has length 53 [2023-11-25 00:04:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:01,959 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 409 transitions. [2023-11-25 00:04:01,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 409 transitions. [2023-11-25 00:04:01,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-25 00:04:01,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:01,964 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] [2023-11-25 00:04:01,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:04:01,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:01,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1666281513, now seen corresponding path program 1 times [2023-11-25 00:04:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:01,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690208810] [2023-11-25 00:04:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:01,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:02,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690208810] [2023-11-25 00:04:02,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690208810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:02,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:02,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:02,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022755493] [2023-11-25 00:04:02,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:02,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:04:02,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:02,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:04:02,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:04:02,262 INFO L87 Difference]: Start difference. First operand 299 states and 409 transitions. Second operand has 5 states, 5 states have (on average 10.8) 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) [2023-11-25 00:04:02,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:02,544 INFO L93 Difference]: Finished difference Result 715 states and 1007 transitions. [2023-11-25 00:04:02,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:02,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) 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 [2023-11-25 00:04:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:02,549 INFO L225 Difference]: With dead ends: 715 [2023-11-25 00:04:02,549 INFO L226 Difference]: Without dead ends: 462 [2023-11-25 00:04:02,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:04:02,553 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 427 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:02,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 173 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:04:02,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-25 00:04:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2023-11-25 00:04:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.4008714596949892) internal successors, (643), 459 states have internal predecessors, (643), 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) [2023-11-25 00:04:02,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 643 transitions. [2023-11-25 00:04:02,578 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 643 transitions. Word has length 54 [2023-11-25 00:04:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:02,579 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 643 transitions. [2023-11-25 00:04:02,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) 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) [2023-11-25 00:04:02,579 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 643 transitions. [2023-11-25 00:04:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-25 00:04:02,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:02,582 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] [2023-11-25 00:04:02,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:04:02,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:02,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:02,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2517767, now seen corresponding path program 1 times [2023-11-25 00:04:02,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:02,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466089953] [2023-11-25 00:04:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:02,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:02,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:02,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466089953] [2023-11-25 00:04:02,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466089953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:02,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:02,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:02,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508446837] [2023-11-25 00:04:02,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:02,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:04:02,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:04:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:04:02,742 INFO L87 Difference]: Start difference. First operand 460 states and 643 transitions. Second operand has 5 states, 5 states have (on average 10.8) 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) [2023-11-25 00:04:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:02,973 INFO L93 Difference]: Finished difference Result 1148 states and 1645 transitions. [2023-11-25 00:04:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) 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 [2023-11-25 00:04:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:02,980 INFO L225 Difference]: With dead ends: 1148 [2023-11-25 00:04:02,981 INFO L226 Difference]: Without dead ends: 784 [2023-11-25 00:04:02,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:04:02,994 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 399 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:02,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 189 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:04:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2023-11-25 00:04:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 782. [2023-11-25 00:04:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 1.4225352112676057) internal successors, (1111), 781 states have internal predecessors, (1111), 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) [2023-11-25 00:04:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1111 transitions. [2023-11-25 00:04:03,031 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1111 transitions. Word has length 54 [2023-11-25 00:04:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:03,040 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 1111 transitions. [2023-11-25 00:04:03,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) 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) [2023-11-25 00:04:03,041 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1111 transitions. [2023-11-25 00:04:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-25 00:04:03,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:03,049 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] [2023-11-25 00:04:03,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:04:03,049 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:03,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash -164201352, now seen corresponding path program 1 times [2023-11-25 00:04:03,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:03,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808192639] [2023-11-25 00:04:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:03,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:03,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:03,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808192639] [2023-11-25 00:04:03,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808192639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:03,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:03,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:03,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009506105] [2023-11-25 00:04:03,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:03,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:04:03,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:04:03,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:04:03,183 INFO L87 Difference]: Start difference. First operand 782 states and 1111 transitions. Second operand has 5 states, 5 states have (on average 10.8) 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) [2023-11-25 00:04:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:03,386 INFO L93 Difference]: Finished difference Result 2141 states and 3090 transitions. [2023-11-25 00:04:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:03,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) 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 [2023-11-25 00:04:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:03,396 INFO L225 Difference]: With dead ends: 2141 [2023-11-25 00:04:03,397 INFO L226 Difference]: Without dead ends: 1428 [2023-11-25 00:04:03,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:04:03,407 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 404 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:03,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 181 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:04:03,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2023-11-25 00:04:03,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1426. [2023-11-25 00:04:03,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 1.4308771929824562) internal successors, (2039), 1425 states have internal predecessors, (2039), 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) [2023-11-25 00:04:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 2039 transitions. [2023-11-25 00:04:03,448 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 2039 transitions. Word has length 54 [2023-11-25 00:04:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:03,449 INFO L495 AbstractCegarLoop]: Abstraction has 1426 states and 2039 transitions. [2023-11-25 00:04:03,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) 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) [2023-11-25 00:04:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 2039 transitions. [2023-11-25 00:04:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-25 00:04:03,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:03,454 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] [2023-11-25 00:04:03,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:04:03,455 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:03,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:03,455 INFO L85 PathProgramCache]: Analyzing trace with hash -128007546, now seen corresponding path program 1 times [2023-11-25 00:04:03,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:03,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595392299] [2023-11-25 00:04:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:03,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:04,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:04,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595392299] [2023-11-25 00:04:04,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595392299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:04,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:04,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-25 00:04:04,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128276428] [2023-11-25 00:04:04,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:04,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-25 00:04:04,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:04,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-25 00:04:04,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:04:04,943 INFO L87 Difference]: Start difference. First operand 1426 states and 2039 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2023-11-25 00:04:05,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:05,847 INFO L93 Difference]: Finished difference Result 2965 states and 4241 transitions. [2023-11-25 00:04:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-25 00:04:05,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 [2023-11-25 00:04:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:05,865 INFO L225 Difference]: With dead ends: 2965 [2023-11-25 00:04:05,865 INFO L226 Difference]: Without dead ends: 2963 [2023-11-25 00:04:05,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2023-11-25 00:04:05,867 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 729 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:05,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1040 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:04:05,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2023-11-25 00:04:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2282. [2023-11-25 00:04:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.4287593160894345) internal successors, (3259), 2281 states have internal predecessors, (3259), 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) [2023-11-25 00:04:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3259 transitions. [2023-11-25 00:04:05,937 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3259 transitions. Word has length 55 [2023-11-25 00:04:05,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:05,938 INFO L495 AbstractCegarLoop]: Abstraction has 2282 states and 3259 transitions. [2023-11-25 00:04:05,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2023-11-25 00:04:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3259 transitions. [2023-11-25 00:04:05,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-25 00:04:05,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:05,939 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] [2023-11-25 00:04:05,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:04:05,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:05,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:05,940 INFO L85 PathProgramCache]: Analyzing trace with hash -232246714, now seen corresponding path program 1 times [2023-11-25 00:04:05,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:05,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120632083] [2023-11-25 00:04:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:05,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:07,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:07,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120632083] [2023-11-25 00:04:07,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120632083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:07,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:07,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-25 00:04:07,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168586922] [2023-11-25 00:04:07,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:07,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-25 00:04:07,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:07,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-25 00:04:07,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:04:07,290 INFO L87 Difference]: Start difference. First operand 2282 states and 3259 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2023-11-25 00:04:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:08,201 INFO L93 Difference]: Finished difference Result 2678 states and 3800 transitions. [2023-11-25 00:04:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-25 00:04:08,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 [2023-11-25 00:04:08,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:08,218 INFO L225 Difference]: With dead ends: 2678 [2023-11-25 00:04:08,218 INFO L226 Difference]: Without dead ends: 2676 [2023-11-25 00:04:08,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2023-11-25 00:04:08,221 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 847 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:08,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 1641 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:04:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2023-11-25 00:04:08,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2301. [2023-11-25 00:04:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 1.4260869565217391) internal successors, (3280), 2300 states have internal predecessors, (3280), 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) [2023-11-25 00:04:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 3280 transitions. [2023-11-25 00:04:08,292 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 3280 transitions. Word has length 55 [2023-11-25 00:04:08,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:08,293 INFO L495 AbstractCegarLoop]: Abstraction has 2301 states and 3280 transitions. [2023-11-25 00:04:08,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2023-11-25 00:04:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 3280 transitions. [2023-11-25 00:04:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-25 00:04:08,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:08,295 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] [2023-11-25 00:04:08,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:04:08,295 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:08,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:08,296 INFO L85 PathProgramCache]: Analyzing trace with hash 86693478, now seen corresponding path program 1 times [2023-11-25 00:04:08,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:08,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054750006] [2023-11-25 00:04:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:08,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:09,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:09,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054750006] [2023-11-25 00:04:09,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054750006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:09,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:09,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-25 00:04:09,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120357466] [2023-11-25 00:04:09,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:09,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-25 00:04:09,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:09,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-25 00:04:09,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:04:09,542 INFO L87 Difference]: Start difference. First operand 2301 states and 3280 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2023-11-25 00:04:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:10,246 INFO L93 Difference]: Finished difference Result 3368 states and 4796 transitions. [2023-11-25 00:04:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-25 00:04:10,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 [2023-11-25 00:04:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:10,263 INFO L225 Difference]: With dead ends: 3368 [2023-11-25 00:04:10,264 INFO L226 Difference]: Without dead ends: 2998 [2023-11-25 00:04:10,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-11-25 00:04:10,266 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 666 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:10,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 1295 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:04:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2023-11-25 00:04:10,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2637. [2023-11-25 00:04:10,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2636 states have (on average 1.4233687405159332) internal successors, (3752), 2636 states have internal predecessors, (3752), 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) [2023-11-25 00:04:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3752 transitions. [2023-11-25 00:04:10,354 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3752 transitions. Word has length 55 [2023-11-25 00:04:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:10,355 INFO L495 AbstractCegarLoop]: Abstraction has 2637 states and 3752 transitions. [2023-11-25 00:04:10,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) [2023-11-25 00:04:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3752 transitions. [2023-11-25 00:04:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-25 00:04:10,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:10,356 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] [2023-11-25 00:04:10,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:04:10,357 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:10,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:10,358 INFO L85 PathProgramCache]: Analyzing trace with hash 350910310, now seen corresponding path program 1 times [2023-11-25 00:04:10,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:10,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203166177] [2023-11-25 00:04:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:10,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:10,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:10,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203166177] [2023-11-25 00:04:10,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203166177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:10,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:10,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:10,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494275032] [2023-11-25 00:04:10,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:10,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:04:10,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:04:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:04:10,468 INFO L87 Difference]: Start difference. First operand 2637 states and 3752 transitions. Second operand has 5 states, 5 states have (on average 11.0) 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) [2023-11-25 00:04:10,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:10,609 INFO L93 Difference]: Finished difference Result 4015 states and 5737 transitions. [2023-11-25 00:04:10,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:10,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) 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 [2023-11-25 00:04:10,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:10,623 INFO L225 Difference]: With dead ends: 4015 [2023-11-25 00:04:10,624 INFO L226 Difference]: Without dead ends: 2637 [2023-11-25 00:04:10,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:04:10,626 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 347 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:10,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 134 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:04:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2023-11-25 00:04:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2637. [2023-11-25 00:04:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2636 states have (on average 1.42298937784522) internal successors, (3751), 2636 states have internal predecessors, (3751), 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) [2023-11-25 00:04:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3751 transitions. [2023-11-25 00:04:10,698 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3751 transitions. Word has length 55 [2023-11-25 00:04:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:10,699 INFO L495 AbstractCegarLoop]: Abstraction has 2637 states and 3751 transitions. [2023-11-25 00:04:10,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) 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) [2023-11-25 00:04:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3751 transitions. [2023-11-25 00:04:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-25 00:04:10,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:10,700 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] [2023-11-25 00:04:10,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-25 00:04:10,700 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:10,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:10,701 INFO L85 PathProgramCache]: Analyzing trace with hash -423858470, now seen corresponding path program 1 times [2023-11-25 00:04:10,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:10,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453181075] [2023-11-25 00:04:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:10,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:12,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:12,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453181075] [2023-11-25 00:04:12,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453181075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:12,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:12,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-25 00:04:12,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132260722] [2023-11-25 00:04:12,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:12,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-25 00:04:12,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:12,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-25 00:04:12,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-25 00:04:12,187 INFO L87 Difference]: Start difference. First operand 2637 states and 3751 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 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) [2023-11-25 00:04:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:13,469 INFO L93 Difference]: Finished difference Result 4982 states and 7131 transitions. [2023-11-25 00:04:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-25 00:04:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 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 [2023-11-25 00:04:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:13,496 INFO L225 Difference]: With dead ends: 4982 [2023-11-25 00:04:13,497 INFO L226 Difference]: Without dead ends: 4980 [2023-11-25 00:04:13,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2023-11-25 00:04:13,501 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 688 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:13,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 1333 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-25 00:04:13,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4980 states. [2023-11-25 00:04:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4980 to 3102. [2023-11-25 00:04:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 1.4259916156078685) internal successors, (4422), 3101 states have internal predecessors, (4422), 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) [2023-11-25 00:04:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 4422 transitions. [2023-11-25 00:04:13,605 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 4422 transitions. Word has length 56 [2023-11-25 00:04:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:13,606 INFO L495 AbstractCegarLoop]: Abstraction has 3102 states and 4422 transitions. [2023-11-25 00:04:13,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 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) [2023-11-25 00:04:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 4422 transitions. [2023-11-25 00:04:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-25 00:04:13,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:13,607 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] [2023-11-25 00:04:13,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-25 00:04:13,608 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:13,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:13,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1401658630, now seen corresponding path program 1 times [2023-11-25 00:04:13,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:13,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139492532] [2023-11-25 00:04:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:13,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:14,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:14,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139492532] [2023-11-25 00:04:14,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139492532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:14,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:14,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-25 00:04:14,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574671683] [2023-11-25 00:04:14,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:14,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-25 00:04:14,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:14,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-25 00:04:14,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-25 00:04:14,893 INFO L87 Difference]: Start difference. First operand 3102 states and 4422 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2023-11-25 00:04:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:15,852 INFO L93 Difference]: Finished difference Result 5473 states and 7812 transitions. [2023-11-25 00:04:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-25 00:04:15,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 [2023-11-25 00:04:15,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:15,887 INFO L225 Difference]: With dead ends: 5473 [2023-11-25 00:04:15,887 INFO L226 Difference]: Without dead ends: 5471 [2023-11-25 00:04:15,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2023-11-25 00:04:15,890 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 710 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:15,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 932 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:04:15,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2023-11-25 00:04:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 3104. [2023-11-25 00:04:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 1.425394779245891) internal successors, (4423), 3103 states have internal predecessors, (4423), 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) [2023-11-25 00:04:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 4423 transitions. [2023-11-25 00:04:16,007 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 4423 transitions. Word has length 57 [2023-11-25 00:04:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:16,007 INFO L495 AbstractCegarLoop]: Abstraction has 3104 states and 4423 transitions. [2023-11-25 00:04:16,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2023-11-25 00:04:16,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 4423 transitions. [2023-11-25 00:04:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-25 00:04:16,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:16,011 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] [2023-11-25 00:04:16,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-25 00:04:16,012 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:16,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1082718438, now seen corresponding path program 1 times [2023-11-25 00:04:16,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:16,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203875744] [2023-11-25 00:04:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:16,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:17,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:17,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203875744] [2023-11-25 00:04:17,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203875744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:17,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:17,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-25 00:04:17,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512794543] [2023-11-25 00:04:17,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:17,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-25 00:04:17,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:17,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-25 00:04:17,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-25 00:04:17,316 INFO L87 Difference]: Start difference. First operand 3104 states and 4423 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2023-11-25 00:04:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:18,573 INFO L93 Difference]: Finished difference Result 4187 states and 5957 transitions. [2023-11-25 00:04:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-25 00:04:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 [2023-11-25 00:04:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:18,606 INFO L225 Difference]: With dead ends: 4187 [2023-11-25 00:04:18,612 INFO L226 Difference]: Without dead ends: 3817 [2023-11-25 00:04:18,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2023-11-25 00:04:18,617 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 458 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:18,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 1675 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-25 00:04:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2023-11-25 00:04:18,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3101. [2023-11-25 00:04:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 1.425483870967742) internal successors, (4419), 3100 states have internal predecessors, (4419), 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) [2023-11-25 00:04:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 4419 transitions. [2023-11-25 00:04:18,724 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 4419 transitions. Word has length 57 [2023-11-25 00:04:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:18,724 INFO L495 AbstractCegarLoop]: Abstraction has 3101 states and 4419 transitions. [2023-11-25 00:04:18,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2023-11-25 00:04:18,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 4419 transitions. [2023-11-25 00:04:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-25 00:04:18,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:18,729 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] [2023-11-25 00:04:18,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-25 00:04:18,730 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:18,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:18,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1232404774, now seen corresponding path program 1 times [2023-11-25 00:04:18,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:18,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341682693] [2023-11-25 00:04:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:18,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:20,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:20,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341682693] [2023-11-25 00:04:20,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341682693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:20,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:20,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-25 00:04:20,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556093222] [2023-11-25 00:04:20,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:20,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-25 00:04:20,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:20,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-25 00:04:20,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-11-25 00:04:20,209 INFO L87 Difference]: Start difference. First operand 3101 states and 4419 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2023-11-25 00:04:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:21,218 INFO L93 Difference]: Finished difference Result 3670 states and 5207 transitions. [2023-11-25 00:04:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-25 00:04:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 [2023-11-25 00:04:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:21,227 INFO L225 Difference]: With dead ends: 3670 [2023-11-25 00:04:21,227 INFO L226 Difference]: Without dead ends: 3668 [2023-11-25 00:04:21,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-11-25 00:04:21,230 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 466 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:21,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1595 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:04:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3668 states. [2023-11-25 00:04:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3668 to 3114. [2023-11-25 00:04:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3114 states, 3113 states have (on average 1.4246707356247992) internal successors, (4435), 3113 states have internal predecessors, (4435), 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) [2023-11-25 00:04:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3114 states to 3114 states and 4435 transitions. [2023-11-25 00:04:21,298 INFO L78 Accepts]: Start accepts. Automaton has 3114 states and 4435 transitions. Word has length 57 [2023-11-25 00:04:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:21,298 INFO L495 AbstractCegarLoop]: Abstraction has 3114 states and 4435 transitions. [2023-11-25 00:04:21,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2023-11-25 00:04:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3114 states and 4435 transitions. [2023-11-25 00:04:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-25 00:04:21,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:21,300 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] [2023-11-25 00:04:21,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-25 00:04:21,301 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:21,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:21,301 INFO L85 PathProgramCache]: Analyzing trace with hash 453041873, now seen corresponding path program 1 times [2023-11-25 00:04:21,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:21,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865457023] [2023-11-25 00:04:21,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:21,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:21,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:21,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865457023] [2023-11-25 00:04:21,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865457023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:21,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:21,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:04:21,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292374955] [2023-11-25 00:04:21,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:21,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:04:21,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:21,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:04:21,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:04:21,355 INFO L87 Difference]: Start difference. First operand 3114 states and 4435 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2023-11-25 00:04:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:21,427 INFO L93 Difference]: Finished difference Result 5169 states and 7402 transitions. [2023-11-25 00:04:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:04:21,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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 [2023-11-25 00:04:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:21,434 INFO L225 Difference]: With dead ends: 5169 [2023-11-25 00:04:21,435 INFO L226 Difference]: Without dead ends: 2993 [2023-11-25 00:04:21,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:04:21,439 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 101 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:21,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 270 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:04:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2023-11-25 00:04:21,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2990. [2023-11-25 00:04:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 1.4225493476078956) internal successors, (4252), 2989 states have internal predecessors, (4252), 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) [2023-11-25 00:04:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 4252 transitions. [2023-11-25 00:04:21,496 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 4252 transitions. Word has length 58 [2023-11-25 00:04:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:21,496 INFO L495 AbstractCegarLoop]: Abstraction has 2990 states and 4252 transitions. [2023-11-25 00:04:21,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2023-11-25 00:04:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 4252 transitions. [2023-11-25 00:04:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-25 00:04:21,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:21,498 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] [2023-11-25 00:04:21,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-25 00:04:21,499 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:21,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:21,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1692553550, now seen corresponding path program 1 times [2023-11-25 00:04:21,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:21,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876453741] [2023-11-25 00:04:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:21,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:21,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:21,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876453741] [2023-11-25 00:04:21,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876453741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:21,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:21,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:04:21,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854495907] [2023-11-25 00:04:21,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:21,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:04:21,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:04:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:04:21,581 INFO L87 Difference]: Start difference. First operand 2990 states and 4252 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2023-11-25 00:04:21,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:21,660 INFO L93 Difference]: Finished difference Result 5517 states and 7900 transitions. [2023-11-25 00:04:21,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:04:21,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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 [2023-11-25 00:04:21,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:21,681 INFO L225 Difference]: With dead ends: 5517 [2023-11-25 00:04:21,681 INFO L226 Difference]: Without dead ends: 2889 [2023-11-25 00:04:21,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:04:21,685 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 94 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:21,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 270 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:04:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2023-11-25 00:04:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2865. [2023-11-25 00:04:21,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 1.4210893854748603) internal successors, (4070), 2864 states have internal predecessors, (4070), 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) [2023-11-25 00:04:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4070 transitions. [2023-11-25 00:04:21,761 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4070 transitions. Word has length 58 [2023-11-25 00:04:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:21,762 INFO L495 AbstractCegarLoop]: Abstraction has 2865 states and 4070 transitions. [2023-11-25 00:04:21,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2023-11-25 00:04:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4070 transitions. [2023-11-25 00:04:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-25 00:04:21,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:21,764 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] [2023-11-25 00:04:21,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-25 00:04:21,765 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:21,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2142315890, now seen corresponding path program 1 times [2023-11-25 00:04:21,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:21,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780234822] [2023-11-25 00:04:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:21,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:23,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:23,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780234822] [2023-11-25 00:04:23,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780234822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:23,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:23,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-25 00:04:23,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288459573] [2023-11-25 00:04:23,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:23,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-25 00:04:23,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-25 00:04:23,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-11-25 00:04:23,295 INFO L87 Difference]: Start difference. First operand 2865 states and 4070 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 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) [2023-11-25 00:04:24,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:24,468 INFO L93 Difference]: Finished difference Result 5085 states and 7237 transitions. [2023-11-25 00:04:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-25 00:04:24,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 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 [2023-11-25 00:04:24,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:24,483 INFO L225 Difference]: With dead ends: 5085 [2023-11-25 00:04:24,483 INFO L226 Difference]: Without dead ends: 5083 [2023-11-25 00:04:24,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-11-25 00:04:24,488 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 493 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:24,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1310 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:04:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2023-11-25 00:04:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 2855. [2023-11-25 00:04:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2855 states, 2854 states have (on average 1.4225648213034339) internal successors, (4060), 2854 states have internal predecessors, (4060), 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) [2023-11-25 00:04:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4060 transitions. [2023-11-25 00:04:24,564 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4060 transitions. Word has length 58 [2023-11-25 00:04:24,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:24,564 INFO L495 AbstractCegarLoop]: Abstraction has 2855 states and 4060 transitions. [2023-11-25 00:04:24,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 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) [2023-11-25 00:04:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4060 transitions. [2023-11-25 00:04:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-25 00:04:24,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:24,566 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] [2023-11-25 00:04:24,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-25 00:04:24,567 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:24,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2048412238, now seen corresponding path program 1 times [2023-11-25 00:04:24,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:24,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175941902] [2023-11-25 00:04:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:26,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:26,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175941902] [2023-11-25 00:04:26,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175941902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:26,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:26,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-25 00:04:26,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31578982] [2023-11-25 00:04:26,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:26,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-25 00:04:26,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:26,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-25 00:04:26,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-25 00:04:26,060 INFO L87 Difference]: Start difference. First operand 2855 states and 4060 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 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) [2023-11-25 00:04:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:27,174 INFO L93 Difference]: Finished difference Result 4765 states and 6769 transitions. [2023-11-25 00:04:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-25 00:04:27,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 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 [2023-11-25 00:04:27,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:27,185 INFO L225 Difference]: With dead ends: 4765 [2023-11-25 00:04:27,186 INFO L226 Difference]: Without dead ends: 4763 [2023-11-25 00:04:27,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2023-11-25 00:04:27,189 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 564 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:27,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1077 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:04:27,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2023-11-25 00:04:27,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 2855. [2023-11-25 00:04:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2855 states, 2854 states have (on average 1.4225648213034339) internal successors, (4060), 2854 states have internal predecessors, (4060), 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) [2023-11-25 00:04:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4060 transitions. [2023-11-25 00:04:27,253 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4060 transitions. Word has length 58 [2023-11-25 00:04:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:27,254 INFO L495 AbstractCegarLoop]: Abstraction has 2855 states and 4060 transitions. [2023-11-25 00:04:27,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 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) [2023-11-25 00:04:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4060 transitions. [2023-11-25 00:04:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-25 00:04:27,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:27,256 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] [2023-11-25 00:04:27,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-25 00:04:27,256 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:27,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1927614866, now seen corresponding path program 1 times [2023-11-25 00:04:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:27,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025706442] [2023-11-25 00:04:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:27,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:28,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:28,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025706442] [2023-11-25 00:04:28,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025706442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:28,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:28,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-25 00:04:28,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804270838] [2023-11-25 00:04:28,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:28,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-25 00:04:28,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:28,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-25 00:04:28,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-11-25 00:04:28,546 INFO L87 Difference]: Start difference. First operand 2855 states and 4060 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 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) [2023-11-25 00:04:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:29,437 INFO L93 Difference]: Finished difference Result 6661 states and 9506 transitions. [2023-11-25 00:04:29,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-25 00:04:29,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 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 [2023-11-25 00:04:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:29,455 INFO L225 Difference]: With dead ends: 6661 [2023-11-25 00:04:29,456 INFO L226 Difference]: Without dead ends: 5955 [2023-11-25 00:04:29,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2023-11-25 00:04:29,461 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 480 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:29,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 1221 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:04:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5955 states. [2023-11-25 00:04:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5955 to 3564. [2023-11-25 00:04:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 3563 states have (on average 1.4193095705865844) internal successors, (5057), 3563 states have internal predecessors, (5057), 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) [2023-11-25 00:04:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 5057 transitions. [2023-11-25 00:04:29,549 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 5057 transitions. Word has length 58 [2023-11-25 00:04:29,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:29,549 INFO L495 AbstractCegarLoop]: Abstraction has 3564 states and 5057 transitions. [2023-11-25 00:04:29,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 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) [2023-11-25 00:04:29,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 5057 transitions. [2023-11-25 00:04:29,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-25 00:04:29,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:29,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:29,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-25 00:04:29,551 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:29,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:29,552 INFO L85 PathProgramCache]: Analyzing trace with hash 244175502, now seen corresponding path program 1 times [2023-11-25 00:04:29,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:29,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91630716] [2023-11-25 00:04:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:29,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:33,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:33,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91630716] [2023-11-25 00:04:33,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91630716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:33,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:33,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-11-25 00:04:33,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146114690] [2023-11-25 00:04:33,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:33,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-25 00:04:33,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:33,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-25 00:04:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2023-11-25 00:04:33,504 INFO L87 Difference]: Start difference. First operand 3564 states and 5057 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:38,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:38,386 INFO L93 Difference]: Finished difference Result 3949 states and 5575 transitions. [2023-11-25 00:04:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-25 00:04:38,387 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-25 00:04:38,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:38,397 INFO L225 Difference]: With dead ends: 3949 [2023-11-25 00:04:38,397 INFO L226 Difference]: Without dead ends: 3947 [2023-11-25 00:04:38,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=617, Invalid=1933, Unknown=0, NotChecked=0, Total=2550 [2023-11-25 00:04:38,400 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1126 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:38,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 1665 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-25 00:04:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3947 states. [2023-11-25 00:04:38,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3947 to 3754. [2023-11-25 00:04:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3754 states, 3753 states have (on average 1.4175326405542232) internal successors, (5320), 3753 states have internal predecessors, (5320), 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) [2023-11-25 00:04:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 5320 transitions. [2023-11-25 00:04:38,476 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 5320 transitions. Word has length 59 [2023-11-25 00:04:38,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:38,477 INFO L495 AbstractCegarLoop]: Abstraction has 3754 states and 5320 transitions. [2023-11-25 00:04:38,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:38,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 5320 transitions. [2023-11-25 00:04:38,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-25 00:04:38,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:38,479 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] [2023-11-25 00:04:38,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-25 00:04:38,479 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:38,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:38,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1479695856, now seen corresponding path program 1 times [2023-11-25 00:04:38,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:38,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255589507] [2023-11-25 00:04:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:38,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:38,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:38,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255589507] [2023-11-25 00:04:38,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255589507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:38,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:38,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:04:38,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610917704] [2023-11-25 00:04:38,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:38,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:04:38,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:04:38,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:04:38,533 INFO L87 Difference]: Start difference. First operand 3754 states and 5320 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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) [2023-11-25 00:04:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:38,608 INFO L93 Difference]: Finished difference Result 6406 states and 9121 transitions. [2023-11-25 00:04:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:04:38,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 [2023-11-25 00:04:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:38,616 INFO L225 Difference]: With dead ends: 6406 [2023-11-25 00:04:38,616 INFO L226 Difference]: Without dead ends: 3198 [2023-11-25 00:04:38,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:04:38,621 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 98 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:38,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 258 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:04:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2023-11-25 00:04:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 3196. [2023-11-25 00:04:38,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 3195 states have (on average 1.4125195618153366) internal successors, (4513), 3195 states have internal predecessors, (4513), 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) [2023-11-25 00:04:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 4513 transitions. [2023-11-25 00:04:38,686 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 4513 transitions. Word has length 60 [2023-11-25 00:04:38,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:38,687 INFO L495 AbstractCegarLoop]: Abstraction has 3196 states and 4513 transitions. [2023-11-25 00:04:38,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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) [2023-11-25 00:04:38,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 4513 transitions. [2023-11-25 00:04:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-25 00:04:38,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:38,689 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] [2023-11-25 00:04:38,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-25 00:04:38,689 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:38,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:38,690 INFO L85 PathProgramCache]: Analyzing trace with hash -121726718, now seen corresponding path program 1 times [2023-11-25 00:04:38,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:38,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115750955] [2023-11-25 00:04:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:38,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat