./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/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_89397c55-34f2-498e-99e1-b69ccc97003d/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/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_89397c55-34f2-498e-99e1-b69ccc97003d/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 eb6a86313c6847913ca8b6f4f78c128447d9c9cbacc492e7ef1a5540e3f6a711 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:52:49,121 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:52:49,205 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:52:49,212 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:52:49,212 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:52:49,239 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:52:49,240 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:52:49,241 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:52:49,242 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:52:49,242 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:52:49,243 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:52:49,243 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:52:49,244 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:52:49,244 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:52:49,245 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:52:49,246 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:52:49,246 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:52:49,247 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:52:49,247 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:52:49,248 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:52:49,249 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:52:49,249 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:52:49,250 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:52:49,251 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:52:49,252 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:52:49,252 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:52:49,253 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:52:49,253 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:52:49,254 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:52:49,254 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:52:49,255 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:52:49,255 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:52:49,256 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:52:49,256 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:52:49,257 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:52:49,257 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:52:49,258 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:52:49,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:52:49,259 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:52:49,259 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:52:49,260 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:52:49,260 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:52:49,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:52:49,261 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:52:49,261 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:52:49,262 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:52:49,262 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:52:49,262 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_89397c55-34f2-498e-99e1-b69ccc97003d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb6a86313c6847913ca8b6f4f78c128447d9c9cbacc492e7ef1a5540e3f6a711 [2023-11-24 23:52:49,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:52:49,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:52:49,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:52:49,557 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:52:49,558 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:52:49,559 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-24 23:52:52,802 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:52:53,156 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:52:53,157 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-24 23:52:53,172 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/bin/utaipan-verify-SwPr7d2a91/data/4c79277b4/76ea242858eb45e3866c20105e18b782/FLAGee70c2c07 [2023-11-24 23:52:53,193 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/bin/utaipan-verify-SwPr7d2a91/data/4c79277b4/76ea242858eb45e3866c20105e18b782 [2023-11-24 23:52:53,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:52:53,201 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:52:53,204 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:52:53,204 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:52:53,211 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:52:53,214 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:53,215 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657da0ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53, skipping insertion in model container [2023-11-24 23:52:53,215 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:53,296 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:52:53,593 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_89397c55-34f2-498e-99e1-b69ccc97003d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8460,8473] [2023-11-24 23:52:53,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:52:53,709 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:52:53,801 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_89397c55-34f2-498e-99e1-b69ccc97003d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8460,8473] [2023-11-24 23:52:53,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:52:53,884 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:52:53,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53 WrapperNode [2023-11-24 23:52:53,885 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:52:53,886 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:52:53,886 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:52:53,886 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:52:53,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:53,909 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:54,040 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 828 [2023-11-24 23:52:54,052 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:52:54,053 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:52:54,053 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:52:54,053 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:52:54,060 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:54,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:54,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:54,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:54,095 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:54,120 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:54,124 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:54,128 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:54,148 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:52:54,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:52:54,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:52:54,149 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:52:54,150 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53" (1/1) ... [2023-11-24 23:52:54,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:52:54,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:52:54,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:52:54,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89397c55-34f2-498e-99e1-b69ccc97003d/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:52:54,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:52:54,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:52:54,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:52:54,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:52:54,438 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:52:54,441 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:52:55,326 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:52:55,650 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:52:55,650 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 23:52:55,653 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:52:55 BoogieIcfgContainer [2023-11-24 23:52:55,653 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:52:55,658 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:52:55,658 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:52:55,661 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:52:55,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:52:53" (1/3) ... [2023-11-24 23:52:55,662 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1cf93e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:52:55, skipping insertion in model container [2023-11-24 23:52:55,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:52:53" (2/3) ... [2023-11-24 23:52:55,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1cf93e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:52:55, skipping insertion in model container [2023-11-24 23:52:55,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:52:55" (3/3) ... [2023-11-24 23:52:55,666 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-24 23:52:55,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:52:55,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:52:55,742 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:52:55,749 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;@4a5b7d32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:52:55,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:52:55,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 151 states have (on average 1.7086092715231789) internal successors, (258), 152 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-24 23:52:55,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:55,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:52:55,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:55,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:55,771 INFO L85 PathProgramCache]: Analyzing trace with hash -278390360, now seen corresponding path program 1 times [2023-11-24 23:52:55,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:55,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339488046] [2023-11-24 23:52:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:55,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:52:56,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:56,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339488046] [2023-11-24 23:52:56,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339488046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:52:56,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:52:56,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:52:56,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145518625] [2023-11-24 23:52:56,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:52:56,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:52:56,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:52:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:52:56,851 INFO L87 Difference]: Start difference. First operand has 153 states, 151 states have (on average 1.7086092715231789) internal successors, (258), 152 states have internal predecessors, (258), 0 states have call successors, (0), 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 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:57,215 INFO L93 Difference]: Finished difference Result 535 states and 857 transitions. [2023-11-24 23:52:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:52:57,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2023-11-24 23:52:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:57,234 INFO L225 Difference]: With dead ends: 535 [2023-11-24 23:52:57,235 INFO L226 Difference]: Without dead ends: 445 [2023-11-24 23:52:57,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:52:57,242 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 747 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:57,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1020 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:52:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-11-24 23:52:57,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 437. [2023-11-24 23:52:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.4059633027522935) internal successors, (613), 436 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 613 transitions. [2023-11-24 23:52:57,337 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 613 transitions. Word has length 66 [2023-11-24 23:52:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:57,339 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 613 transitions. [2023-11-24 23:52:57,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 613 transitions. [2023-11-24 23:52:57,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-24 23:52:57,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:57,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:52:57,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:52:57,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:57,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:57,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1594768938, now seen corresponding path program 1 times [2023-11-24 23:52:57,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:57,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649433529] [2023-11-24 23:52:57,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:57,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:52:57,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:57,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649433529] [2023-11-24 23:52:57,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649433529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:52:57,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:52:57,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:52:57,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166612896] [2023-11-24 23:52:57,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:52:57,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:52:57,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:57,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:52:57,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:52:57,620 INFO L87 Difference]: Start difference. First operand 437 states and 613 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:57,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:57,928 INFO L93 Difference]: Finished difference Result 1045 states and 1509 transitions. [2023-11-24 23:52:57,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:52:57,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-24 23:52:57,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:57,934 INFO L225 Difference]: With dead ends: 1045 [2023-11-24 23:52:57,935 INFO L226 Difference]: Without dead ends: 684 [2023-11-24 23:52:57,937 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 [2023-11-24 23:52:57,939 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 526 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:57,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 219 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:52:57,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2023-11-24 23:52:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 682. [2023-11-24 23:52:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 1.4375917767988253) internal successors, (979), 681 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 979 transitions. [2023-11-24 23:52:57,986 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 979 transitions. Word has length 67 [2023-11-24 23:52:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:57,987 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 979 transitions. [2023-11-24 23:52:57,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 979 transitions. [2023-11-24 23:52:57,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-24 23:52:57,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:57,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:52:57,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:52:57,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:57,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:57,994 INFO L85 PathProgramCache]: Analyzing trace with hash -486383480, now seen corresponding path program 1 times [2023-11-24 23:52:57,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:57,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434553433] [2023-11-24 23:52:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:57,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:52:58,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:58,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434553433] [2023-11-24 23:52:58,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434553433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:52:58,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:52:58,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:52:58,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003764203] [2023-11-24 23:52:58,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:52:58,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:52:58,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:58,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:52:58,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:52:58,165 INFO L87 Difference]: Start difference. First operand 682 states and 979 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:58,444 INFO L93 Difference]: Finished difference Result 1716 states and 2525 transitions. [2023-11-24 23:52:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:52:58,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-24 23:52:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:58,452 INFO L225 Difference]: With dead ends: 1716 [2023-11-24 23:52:58,453 INFO L226 Difference]: Without dead ends: 1174 [2023-11-24 23:52:58,454 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 [2023-11-24 23:52:58,456 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 533 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:58,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 228 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:52:58,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2023-11-24 23:52:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1172. [2023-11-24 23:52:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 1.4611443210930828) internal successors, (1711), 1171 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1711 transitions. [2023-11-24 23:52:58,490 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1711 transitions. Word has length 67 [2023-11-24 23:52:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:58,490 INFO L495 AbstractCegarLoop]: Abstraction has 1172 states and 1711 transitions. [2023-11-24 23:52:58,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1711 transitions. [2023-11-24 23:52:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-24 23:52:58,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:58,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:52:58,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:52:58,493 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:58,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1249917383, now seen corresponding path program 1 times [2023-11-24 23:52:58,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:58,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150760758] [2023-11-24 23:52:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:58,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:52:58,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:58,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150760758] [2023-11-24 23:52:58,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150760758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:52:58,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:52:58,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:52:58,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589913153] [2023-11-24 23:52:58,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:52:58,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:52:58,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:52:58,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:52:58,689 INFO L87 Difference]: Start difference. First operand 1172 states and 1711 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:58,952 INFO L93 Difference]: Finished difference Result 3220 states and 4773 transitions. [2023-11-24 23:52:58,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:52:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-24 23:52:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:58,965 INFO L225 Difference]: With dead ends: 3220 [2023-11-24 23:52:58,965 INFO L226 Difference]: Without dead ends: 2154 [2023-11-24 23:52:58,968 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 [2023-11-24 23:52:58,979 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 503 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:58,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 227 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:52:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2023-11-24 23:52:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2023-11-24 23:52:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 1.4718735471873547) internal successors, (3166), 2151 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3166 transitions. [2023-11-24 23:52:59,037 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3166 transitions. Word has length 67 [2023-11-24 23:52:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:59,039 INFO L495 AbstractCegarLoop]: Abstraction has 2152 states and 3166 transitions. [2023-11-24 23:52:59,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3166 transitions. [2023-11-24 23:52:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-24 23:52:59,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:59,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:52:59,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:52:59,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:59,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:59,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1878214747, now seen corresponding path program 1 times [2023-11-24 23:52:59,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:59,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726384373] [2023-11-24 23:52:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:59,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:52:59,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:59,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726384373] [2023-11-24 23:52:59,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726384373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:52:59,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:52:59,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:52:59,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770521244] [2023-11-24 23:52:59,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:52:59,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:52:59,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:59,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:52:59,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:52:59,260 INFO L87 Difference]: Start difference. First operand 2152 states and 3166 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:59,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:59,528 INFO L93 Difference]: Finished difference Result 6213 states and 9215 transitions. [2023-11-24 23:52:59,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:52:59,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-24 23:52:59,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:59,552 INFO L225 Difference]: With dead ends: 6213 [2023-11-24 23:52:59,552 INFO L226 Difference]: Without dead ends: 4114 [2023-11-24 23:52:59,558 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 [2023-11-24 23:52:59,561 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 519 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:59,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 211 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:52:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2023-11-24 23:52:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 4112. [2023-11-24 23:52:59,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4112 states, 4111 states have (on average 1.4699586475310145) internal successors, (6043), 4111 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4112 states to 4112 states and 6043 transitions. [2023-11-24 23:52:59,673 INFO L78 Accepts]: Start accepts. Automaton has 4112 states and 6043 transitions. Word has length 67 [2023-11-24 23:52:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:59,674 INFO L495 AbstractCegarLoop]: Abstraction has 4112 states and 6043 transitions. [2023-11-24 23:52:59,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4112 states and 6043 transitions. [2023-11-24 23:52:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-24 23:52:59,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:59,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:52:59,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:52:59,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:52:59,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:59,677 INFO L85 PathProgramCache]: Analyzing trace with hash 892905404, now seen corresponding path program 1 times [2023-11-24 23:52:59,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:59,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311588461] [2023-11-24 23:52:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:59,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:01,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:01,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311588461] [2023-11-24 23:53:01,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311588461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:01,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:53:01,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-24 23:53:01,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737064144] [2023-11-24 23:53:01,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:01,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 23:53:01,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:01,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 23:53:01,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-24 23:53:01,579 INFO L87 Difference]: Start difference. First operand 4112 states and 6043 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:02,492 INFO L93 Difference]: Finished difference Result 8087 states and 11830 transitions. [2023-11-24 23:53:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 23:53:02,492 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-24 23:53:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:02,532 INFO L225 Difference]: With dead ends: 8087 [2023-11-24 23:53:02,533 INFO L226 Difference]: Without dead ends: 8085 [2023-11-24 23:53:02,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-11-24 23:53:02,536 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 887 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:02,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 1251 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:53:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8085 states. [2023-11-24 23:53:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8085 to 6249. [2023-11-24 23:53:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6249 states, 6248 states have (on average 1.4638284250960307) internal successors, (9146), 6248 states have internal predecessors, (9146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6249 states to 6249 states and 9146 transitions. [2023-11-24 23:53:02,710 INFO L78 Accepts]: Start accepts. Automaton has 6249 states and 9146 transitions. Word has length 68 [2023-11-24 23:53:02,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:02,711 INFO L495 AbstractCegarLoop]: Abstraction has 6249 states and 9146 transitions. [2023-11-24 23:53:02,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 6249 states and 9146 transitions. [2023-11-24 23:53:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-24 23:53:02,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:02,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:02,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:53:02,713 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:02,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:02,714 INFO L85 PathProgramCache]: Analyzing trace with hash -256768132, now seen corresponding path program 1 times [2023-11-24 23:53:02,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:02,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798961553] [2023-11-24 23:53:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:02,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:04,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:04,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798961553] [2023-11-24 23:53:04,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798961553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:04,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:53:04,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-24 23:53:04,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191213013] [2023-11-24 23:53:04,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:04,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 23:53:04,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:04,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 23:53:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-24 23:53:04,396 INFO L87 Difference]: Start difference. First operand 6249 states and 9146 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:05,729 INFO L93 Difference]: Finished difference Result 7989 states and 11632 transitions. [2023-11-24 23:53:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 23:53:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-24 23:53:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:05,772 INFO L225 Difference]: With dead ends: 7989 [2023-11-24 23:53:05,772 INFO L226 Difference]: Without dead ends: 7987 [2023-11-24 23:53:05,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2023-11-24 23:53:05,775 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 879 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:05,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 1986 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:53:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7987 states. [2023-11-24 23:53:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7987 to 6271. [2023-11-24 23:53:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 6270 states have (on average 1.4628389154704944) internal successors, (9172), 6270 states have internal predecessors, (9172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:05,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 9172 transitions. [2023-11-24 23:53:05,963 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 9172 transitions. Word has length 68 [2023-11-24 23:53:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:05,963 INFO L495 AbstractCegarLoop]: Abstraction has 6271 states and 9172 transitions. [2023-11-24 23:53:05,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 9172 transitions. [2023-11-24 23:53:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-24 23:53:05,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:05,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:05,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:53:05,966 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:05,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:05,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1394193308, now seen corresponding path program 1 times [2023-11-24 23:53:05,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:05,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888442859] [2023-11-24 23:53:05,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:05,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:07,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:07,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888442859] [2023-11-24 23:53:07,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888442859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:07,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:53:07,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-24 23:53:07,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775385043] [2023-11-24 23:53:07,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:07,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 23:53:07,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:07,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 23:53:07,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-24 23:53:07,665 INFO L87 Difference]: Start difference. First operand 6271 states and 9172 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:09,013 INFO L93 Difference]: Finished difference Result 8926 states and 13016 transitions. [2023-11-24 23:53:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 23:53:09,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-24 23:53:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:09,048 INFO L225 Difference]: With dead ends: 8926 [2023-11-24 23:53:09,048 INFO L226 Difference]: Without dead ends: 8012 [2023-11-24 23:53:09,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-11-24 23:53:09,053 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 776 mSDsluCounter, 1796 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:09,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 2118 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 23:53:09,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2023-11-24 23:53:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 7103. [2023-11-24 23:53:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7103 states, 7102 states have (on average 1.4601520698394819) internal successors, (10370), 7102 states have internal predecessors, (10370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 10370 transitions. [2023-11-24 23:53:09,241 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 10370 transitions. Word has length 68 [2023-11-24 23:53:09,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:09,242 INFO L495 AbstractCegarLoop]: Abstraction has 7103 states and 10370 transitions. [2023-11-24 23:53:09,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:09,243 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 10370 transitions. [2023-11-24 23:53:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-24 23:53:09,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:09,244 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:09,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:53:09,245 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:09,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:09,245 INFO L85 PathProgramCache]: Analyzing trace with hash -851516452, now seen corresponding path program 1 times [2023-11-24 23:53:09,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:09,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881972396] [2023-11-24 23:53:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:09,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:10,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:10,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881972396] [2023-11-24 23:53:10,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881972396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:10,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:53:10,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-24 23:53:10,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145146119] [2023-11-24 23:53:10,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:10,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 23:53:10,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:10,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 23:53:10,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-24 23:53:10,766 INFO L87 Difference]: Start difference. First operand 7103 states and 10370 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:12,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:12,047 INFO L93 Difference]: Finished difference Result 12422 states and 18149 transitions. [2023-11-24 23:53:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 23:53:12,048 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-24 23:53:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:12,076 INFO L225 Difference]: With dead ends: 12422 [2023-11-24 23:53:12,076 INFO L226 Difference]: Without dead ends: 12420 [2023-11-24 23:53:12,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-11-24 23:53:12,081 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 854 mSDsluCounter, 2777 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:12,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 3111 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:53:12,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12420 states. [2023-11-24 23:53:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12420 to 7865. [2023-11-24 23:53:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 1.460707019328586) internal successors, (11487), 7864 states have internal predecessors, (11487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 11487 transitions. [2023-11-24 23:53:12,278 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 11487 transitions. Word has length 68 [2023-11-24 23:53:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:12,279 INFO L495 AbstractCegarLoop]: Abstraction has 7865 states and 11487 transitions. [2023-11-24 23:53:12,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 11487 transitions. [2023-11-24 23:53:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-24 23:53:12,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:12,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:12,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:53:12,282 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:12,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:12,283 INFO L85 PathProgramCache]: Analyzing trace with hash 30479326, now seen corresponding path program 1 times [2023-11-24 23:53:12,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:12,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435417377] [2023-11-24 23:53:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:12,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:12,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:12,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435417377] [2023-11-24 23:53:12,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435417377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:12,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:53:12,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:53:12,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087250764] [2023-11-24 23:53:12,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:12,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:53:12,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:53:12,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:53:12,455 INFO L87 Difference]: Start difference. First operand 7865 states and 11487 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:12,638 INFO L93 Difference]: Finished difference Result 11915 states and 17460 transitions. [2023-11-24 23:53:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:53:12,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-24 23:53:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:12,658 INFO L225 Difference]: With dead ends: 11915 [2023-11-24 23:53:12,658 INFO L226 Difference]: Without dead ends: 7865 [2023-11-24 23:53:12,665 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 [2023-11-24 23:53:12,666 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 433 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:12,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 164 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:53:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7865 states. [2023-11-24 23:53:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7865 to 7865. [2023-11-24 23:53:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 1.4605798575788402) internal successors, (11486), 7864 states have internal predecessors, (11486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 11486 transitions. [2023-11-24 23:53:12,810 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 11486 transitions. Word has length 68 [2023-11-24 23:53:12,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:12,811 INFO L495 AbstractCegarLoop]: Abstraction has 7865 states and 11486 transitions. [2023-11-24 23:53:12,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 11486 transitions. [2023-11-24 23:53:12,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-24 23:53:12,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:12,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:12,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:53:12,813 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:12,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:12,814 INFO L85 PathProgramCache]: Analyzing trace with hash -679109846, now seen corresponding path program 1 times [2023-11-24 23:53:12,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:12,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944888511] [2023-11-24 23:53:12,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:12,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:14,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:14,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944888511] [2023-11-24 23:53:14,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944888511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:14,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:53:14,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-24 23:53:14,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224181463] [2023-11-24 23:53:14,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:14,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 23:53:14,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:14,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 23:53:14,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-24 23:53:14,170 INFO L87 Difference]: Start difference. First operand 7865 states and 11486 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:15,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:15,273 INFO L93 Difference]: Finished difference Result 15129 states and 22168 transitions. [2023-11-24 23:53:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 23:53:15,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2023-11-24 23:53:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:15,308 INFO L225 Difference]: With dead ends: 15129 [2023-11-24 23:53:15,308 INFO L226 Difference]: Without dead ends: 15127 [2023-11-24 23:53:15,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-11-24 23:53:15,314 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 731 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:15,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 1904 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:53:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15127 states. [2023-11-24 23:53:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15127 to 8960. [2023-11-24 23:53:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8960 states, 8959 states have (on average 1.4626632436655878) internal successors, (13104), 8959 states have internal predecessors, (13104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8960 states to 8960 states and 13104 transitions. [2023-11-24 23:53:15,515 INFO L78 Accepts]: Start accepts. Automaton has 8960 states and 13104 transitions. Word has length 69 [2023-11-24 23:53:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:15,516 INFO L495 AbstractCegarLoop]: Abstraction has 8960 states and 13104 transitions. [2023-11-24 23:53:15,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 8960 states and 13104 transitions. [2023-11-24 23:53:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-24 23:53:15,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:15,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:15,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:53:15,518 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:15,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:15,519 INFO L85 PathProgramCache]: Analyzing trace with hash 77029520, now seen corresponding path program 1 times [2023-11-24 23:53:15,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:15,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170995897] [2023-11-24 23:53:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:15,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:17,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:17,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170995897] [2023-11-24 23:53:17,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170995897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:17,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:53:17,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-11-24 23:53:17,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711005073] [2023-11-24 23:53:17,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:17,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 23:53:17,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:17,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 23:53:17,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-11-24 23:53:17,463 INFO L87 Difference]: Start difference. First operand 8960 states and 13104 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:20,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:20,215 INFO L93 Difference]: Finished difference Result 11624 states and 16908 transitions. [2023-11-24 23:53:20,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 23:53:20,216 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-24 23:53:20,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:20,239 INFO L225 Difference]: With dead ends: 11624 [2023-11-24 23:53:20,239 INFO L226 Difference]: Without dead ends: 11622 [2023-11-24 23:53:20,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2023-11-24 23:53:20,244 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 1146 mSDsluCounter, 1832 mSDsCounter, 0 mSdLazyCounter, 2433 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:20,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 2019 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2433 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-24 23:53:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11622 states. [2023-11-24 23:53:20,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11622 to 8966. [2023-11-24 23:53:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8966 states, 8965 states have (on average 1.4624651422197434) internal successors, (13111), 8965 states have internal predecessors, (13111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8966 states to 8966 states and 13111 transitions. [2023-11-24 23:53:20,414 INFO L78 Accepts]: Start accepts. Automaton has 8966 states and 13111 transitions. Word has length 70 [2023-11-24 23:53:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:20,414 INFO L495 AbstractCegarLoop]: Abstraction has 8966 states and 13111 transitions. [2023-11-24 23:53:20,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 8966 states and 13111 transitions. [2023-11-24 23:53:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-24 23:53:20,416 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:20,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:20,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 23:53:20,417 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:20,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:20,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1727990960, now seen corresponding path program 1 times [2023-11-24 23:53:20,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:20,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739922559] [2023-11-24 23:53:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:20,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:21,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:21,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739922559] [2023-11-24 23:53:21,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739922559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:21,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:53:21,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-24 23:53:21,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222452946] [2023-11-24 23:53:21,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:21,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 23:53:21,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:21,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 23:53:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-24 23:53:21,927 INFO L87 Difference]: Start difference. First operand 8966 states and 13111 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:23,025 INFO L93 Difference]: Finished difference Result 11640 states and 16979 transitions. [2023-11-24 23:53:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 23:53:23,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-24 23:53:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:23,046 INFO L225 Difference]: With dead ends: 11640 [2023-11-24 23:53:23,046 INFO L226 Difference]: Without dead ends: 10726 [2023-11-24 23:53:23,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2023-11-24 23:53:23,051 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 870 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:23,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 1697 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:53:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10726 states. [2023-11-24 23:53:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10726 to 8963. [2023-11-24 23:53:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 8962 states have (on average 1.462508368667708) internal successors, (13107), 8962 states have internal predecessors, (13107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 13107 transitions. [2023-11-24 23:53:23,200 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 13107 transitions. Word has length 70 [2023-11-24 23:53:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:23,200 INFO L495 AbstractCegarLoop]: Abstraction has 8963 states and 13107 transitions. [2023-11-24 23:53:23,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 13107 transitions. [2023-11-24 23:53:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-24 23:53:23,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:23,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:23,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 23:53:23,203 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:23,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash 778368112, now seen corresponding path program 1 times [2023-11-24 23:53:23,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:23,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448890287] [2023-11-24 23:53:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:23,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:26,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:26,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448890287] [2023-11-24 23:53:26,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448890287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:26,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:53:26,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-11-24 23:53:26,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447908372] [2023-11-24 23:53:26,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:26,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-24 23:53:26,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-24 23:53:26,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-11-24 23:53:26,587 INFO L87 Difference]: Start difference. First operand 8963 states and 13107 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:32,320 INFO L93 Difference]: Finished difference Result 11710 states and 17026 transitions. [2023-11-24 23:53:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-24 23:53:32,321 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-24 23:53:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:32,338 INFO L225 Difference]: With dead ends: 11710 [2023-11-24 23:53:32,338 INFO L226 Difference]: Without dead ends: 11708 [2023-11-24 23:53:32,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=498, Invalid=2052, Unknown=0, NotChecked=0, Total=2550 [2023-11-24 23:53:32,342 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 1537 mSDsluCounter, 2570 mSDsCounter, 0 mSdLazyCounter, 4026 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 2803 SdHoareTripleChecker+Invalid, 4037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 4026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:32,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1537 Valid, 2803 Invalid, 4037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 4026 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-24 23:53:32,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11708 states. [2023-11-24 23:53:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11708 to 8972. [2023-11-24 23:53:32,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8972 states, 8971 states have (on average 1.4622673057630142) internal successors, (13118), 8971 states have internal predecessors, (13118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:32,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8972 states to 8972 states and 13118 transitions. [2023-11-24 23:53:32,481 INFO L78 Accepts]: Start accepts. Automaton has 8972 states and 13118 transitions. Word has length 70 [2023-11-24 23:53:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:32,481 INFO L495 AbstractCegarLoop]: Abstraction has 8972 states and 13118 transitions. [2023-11-24 23:53:32,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 8972 states and 13118 transitions. [2023-11-24 23:53:32,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-24 23:53:32,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:32,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:32,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 23:53:32,484 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:32,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:32,484 INFO L85 PathProgramCache]: Analyzing trace with hash -125455120, now seen corresponding path program 1 times [2023-11-24 23:53:32,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:32,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328816167] [2023-11-24 23:53:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:32,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:53:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:53:34,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:53:34,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328816167] [2023-11-24 23:53:34,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328816167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:53:34,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:53:34,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-11-24 23:53:34,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106249483] [2023-11-24 23:53:34,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:53:34,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-24 23:53:34,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:53:34,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-24 23:53:34,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:53:34,866 INFO L87 Difference]: Start difference. First operand 8972 states and 13118 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:53:37,692 INFO L93 Difference]: Finished difference Result 15090 states and 22012 transitions. [2023-11-24 23:53:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 23:53:37,693 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-24 23:53:37,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:53:37,719 INFO L225 Difference]: With dead ends: 15090 [2023-11-24 23:53:37,719 INFO L226 Difference]: Without dead ends: 15088 [2023-11-24 23:53:37,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2023-11-24 23:53:37,725 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 1252 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:53:37,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 1904 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-24 23:53:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15088 states. [2023-11-24 23:53:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15088 to 8982. [2023-11-24 23:53:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8982 states, 8981 states have (on average 1.4620866273243514) internal successors, (13131), 8981 states have internal predecessors, (13131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8982 states to 8982 states and 13131 transitions. [2023-11-24 23:53:37,926 INFO L78 Accepts]: Start accepts. Automaton has 8982 states and 13131 transitions. Word has length 70 [2023-11-24 23:53:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:53:37,927 INFO L495 AbstractCegarLoop]: Abstraction has 8982 states and 13131 transitions. [2023-11-24 23:53:37,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:53:37,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8982 states and 13131 transitions. [2023-11-24 23:53:37,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-24 23:53:37,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:53:37,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:53:37,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 23:53:37,930 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:53:37,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:53:37,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1275128656, now seen corresponding path program 1 times [2023-11-24 23:53:37,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:53:37,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512514350] [2023-11-24 23:53:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:53:37,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:53:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat