./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:32:16,689 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:32:16,846 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:32:16,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:32:16,856 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:32:16,901 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:32:16,902 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:32:16,903 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:32:16,904 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:32:16,910 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:32:16,910 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:32:16,911 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:32:16,912 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:32:16,914 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:32:16,914 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:32:16,915 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:32:16,915 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:32:16,916 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:32:16,917 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:32:16,917 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:32:16,918 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:32:16,919 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:32:16,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:32:16,921 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:32:16,921 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:32:16,922 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:32:16,922 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:32:16,923 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:32:16,923 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:32:16,924 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:32:16,925 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:32:16,926 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:32:16,926 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:32:16,927 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:32:16,927 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:32:16,927 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:32:16,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:32:16,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:16,928 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:32:16,929 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:32:16,929 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:32:16,930 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:32:16,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:32:16,930 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:32:16,931 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:32:16,931 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:32:16,932 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:32:16,932 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_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1221f43edcd55fb28cc2c33b3cd78828237d81c097e561fccaa486cdd56e141 [2023-11-23 20:32:17,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:32:17,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:32:17,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:32:17,336 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:32:17,337 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:32:17,338 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-23 20:32:20,682 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:32:20,971 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:32:20,976 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-23 20:32:20,995 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/data/2d9c5f5f1/e0cd25ad042b4a65a9a3a3e791a8be87/FLAG0e32e1555 [2023-11-23 20:32:21,012 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/data/2d9c5f5f1/e0cd25ad042b4a65a9a3a3e791a8be87 [2023-11-23 20:32:21,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:32:21,019 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:32:21,023 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:21,023 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:32:21,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:32:21,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,030 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e4d8c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21, skipping insertion in model container [2023-11-23 20:32:21,031 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,106 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:32:21,455 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_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2023-11-23 20:32:21,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:21,551 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:32:21,625 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_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2023-11-23 20:32:21,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:21,683 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:32:21,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21 WrapperNode [2023-11-23 20:32:21,684 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:21,685 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:21,685 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:32:21,686 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:32:21,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,707 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,765 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 687 [2023-11-23 20:32:21,765 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:21,766 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:32:21,766 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:32:21,766 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:32:21,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,781 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,782 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,798 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,826 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,841 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,844 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,863 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:32:21,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:32:21,865 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:32:21,865 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:32:21,866 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:21,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:21,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:32:21,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0f77eb-db31-4b14-a4a5-3e88cfdf93b1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:32:21,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:32:21,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:32:21,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:32:21,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:32:22,146 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:32:22,148 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:32:23,054 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:32:23,293 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:32:23,293 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 20:32:23,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:23 BoogieIcfgContainer [2023-11-23 20:32:23,296 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:32:23,299 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:32:23,299 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:32:23,303 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:32:23,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:32:21" (1/3) ... [2023-11-23 20:32:23,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e55bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:23, skipping insertion in model container [2023-11-23 20:32:23,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21" (2/3) ... [2023-11-23 20:32:23,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e55bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:23, skipping insertion in model container [2023-11-23 20:32:23,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:23" (3/3) ... [2023-11-23 20:32:23,307 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-23 20:32:23,331 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:32:23,332 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:32:23,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:32:23,413 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;@14db3944, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:32:23,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:32:23,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 121 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 20:32:23,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:23,455 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] [2023-11-23 20:32:23,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:23,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash -841009558, now seen corresponding path program 1 times [2023-11-23 20:32:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:23,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740356950] [2023-11-23 20:32:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:23,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:24,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:24,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740356950] [2023-11-23 20:32:24,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740356950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:24,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:24,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:32:24,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732033886] [2023-11-23 20:32:24,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:24,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:32:24,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:32:24,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:32:24,397 INFO L87 Difference]: Start difference. First operand has 122 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 121 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:24,836 INFO L93 Difference]: Finished difference Result 371 states and 594 transitions. [2023-11-23 20:32:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:32:24,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2023-11-23 20:32:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:24,868 INFO L225 Difference]: With dead ends: 371 [2023-11-23 20:32:24,868 INFO L226 Difference]: Without dead ends: 296 [2023-11-23 20:32:24,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:32:24,893 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 459 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:24,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 717 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:32:24,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-23 20:32:24,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 290. [2023-11-23 20:32:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.3840830449826989) internal successors, (400), 289 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 400 transitions. [2023-11-23 20:32:24,986 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 400 transitions. Word has length 52 [2023-11-23 20:32:24,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:24,987 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 400 transitions. [2023-11-23 20:32:24,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:24,988 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 400 transitions. [2023-11-23 20:32:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 20:32:24,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:24,992 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] [2023-11-23 20:32:24,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:32:24,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:24,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:24,994 INFO L85 PathProgramCache]: Analyzing trace with hash -967017349, now seen corresponding path program 1 times [2023-11-23 20:32:24,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:24,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125420980] [2023-11-23 20:32:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:24,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:25,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:25,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125420980] [2023-11-23 20:32:25,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125420980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:25,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:25,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:32:25,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078554705] [2023-11-23 20:32:25,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:25,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:32:25,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:25,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:32:25,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:25,373 INFO L87 Difference]: Start difference. First operand 290 states and 400 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:25,702 INFO L93 Difference]: Finished difference Result 690 states and 982 transitions. [2023-11-23 20:32:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:32:25,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-23 20:32:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:25,711 INFO L225 Difference]: With dead ends: 690 [2023-11-23 20:32:25,711 INFO L226 Difference]: Without dead ends: 445 [2023-11-23 20:32:25,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:32:25,726 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 419 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:25,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 167 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:32:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-11-23 20:32:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 443. [2023-11-23 20:32:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.416289592760181) internal successors, (626), 442 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 626 transitions. [2023-11-23 20:32:25,800 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 626 transitions. Word has length 53 [2023-11-23 20:32:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:25,801 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 626 transitions. [2023-11-23 20:32:25,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:25,802 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 626 transitions. [2023-11-23 20:32:25,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 20:32:25,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:25,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:25,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:32:25,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:25,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:25,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1004572121, now seen corresponding path program 1 times [2023-11-23 20:32:25,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:25,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511428563] [2023-11-23 20:32:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:25,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:26,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:26,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511428563] [2023-11-23 20:32:26,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511428563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:26,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:26,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:32:26,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344194353] [2023-11-23 20:32:26,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:26,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:32:26,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:26,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:32:26,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:26,112 INFO L87 Difference]: Start difference. First operand 443 states and 626 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:26,393 INFO L93 Difference]: Finished difference Result 1099 states and 1596 transitions. [2023-11-23 20:32:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:32:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-23 20:32:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:26,402 INFO L225 Difference]: With dead ends: 1099 [2023-11-23 20:32:26,403 INFO L226 Difference]: Without dead ends: 751 [2023-11-23 20:32:26,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:32:26,417 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 391 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:26,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 183 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:32:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-11-23 20:32:26,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 749. [2023-11-23 20:32:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.4411764705882353) internal successors, (1078), 748 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1078 transitions. [2023-11-23 20:32:26,458 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1078 transitions. Word has length 53 [2023-11-23 20:32:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:26,464 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 1078 transitions. [2023-11-23 20:32:26,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1078 transitions. [2023-11-23 20:32:26,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 20:32:26,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:26,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:26,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:32:26,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:26,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:26,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1388921866, now seen corresponding path program 1 times [2023-11-23 20:32:26,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:26,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805463728] [2023-11-23 20:32:26,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:26,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:26,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:26,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805463728] [2023-11-23 20:32:26,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805463728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:26,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:26,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:32:26,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991701446] [2023-11-23 20:32:26,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:26,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:32:26,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:26,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:32:26,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:26,657 INFO L87 Difference]: Start difference. First operand 749 states and 1078 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:26,880 INFO L93 Difference]: Finished difference Result 2044 states and 2993 transitions. [2023-11-23 20:32:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:32:26,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-23 20:32:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:26,889 INFO L225 Difference]: With dead ends: 2044 [2023-11-23 20:32:26,890 INFO L226 Difference]: Without dead ends: 1363 [2023-11-23 20:32:26,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:32:26,894 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 396 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:26,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 175 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:32:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2023-11-23 20:32:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1361. [2023-11-23 20:32:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 1.451470588235294) internal successors, (1974), 1360 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1974 transitions. [2023-11-23 20:32:26,945 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1974 transitions. Word has length 53 [2023-11-23 20:32:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:26,945 INFO L495 AbstractCegarLoop]: Abstraction has 1361 states and 1974 transitions. [2023-11-23 20:32:26,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1974 transitions. [2023-11-23 20:32:26,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 20:32:26,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:26,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:26,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:32:26,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:26,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1063344990, now seen corresponding path program 1 times [2023-11-23 20:32:26,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:26,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891715853] [2023-11-23 20:32:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:26,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:28,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:28,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891715853] [2023-11-23 20:32:28,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891715853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:28,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:28,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-23 20:32:28,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731902708] [2023-11-23 20:32:28,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:28,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 20:32:28,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:28,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 20:32:28,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-23 20:32:28,657 INFO L87 Difference]: Start difference. First operand 1361 states and 1974 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:29,431 INFO L93 Difference]: Finished difference Result 2831 states and 4107 transitions. [2023-11-23 20:32:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:32:29,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-23 20:32:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:29,452 INFO L225 Difference]: With dead ends: 2831 [2023-11-23 20:32:29,452 INFO L226 Difference]: Without dead ends: 2829 [2023-11-23 20:32:29,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-11-23 20:32:29,455 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 535 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:29,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 1057 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:32:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2023-11-23 20:32:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2177. [2023-11-23 20:32:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 1.4494485294117647) internal successors, (3154), 2176 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3154 transitions. [2023-11-23 20:32:29,546 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3154 transitions. Word has length 54 [2023-11-23 20:32:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:29,547 INFO L495 AbstractCegarLoop]: Abstraction has 2177 states and 3154 transitions. [2023-11-23 20:32:29,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3154 transitions. [2023-11-23 20:32:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 20:32:29,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:29,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:29,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:32:29,549 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:29,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:29,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1326291742, now seen corresponding path program 1 times [2023-11-23 20:32:29,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:29,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25630042] [2023-11-23 20:32:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:29,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:31,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:31,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25630042] [2023-11-23 20:32:31,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25630042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:31,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:31,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-23 20:32:31,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803408412] [2023-11-23 20:32:31,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:31,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 20:32:31,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:31,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 20:32:31,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-23 20:32:31,208 INFO L87 Difference]: Start difference. First operand 2177 states and 3154 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:32,008 INFO L93 Difference]: Finished difference Result 2517 states and 3635 transitions. [2023-11-23 20:32:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:32:32,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-23 20:32:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:32,027 INFO L225 Difference]: With dead ends: 2517 [2023-11-23 20:32:32,027 INFO L226 Difference]: Without dead ends: 2515 [2023-11-23 20:32:32,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-11-23 20:32:32,030 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 498 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:32,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 1661 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:32:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2023-11-23 20:32:32,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2196. [2023-11-23 20:32:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 1.4464692482915718) internal successors, (3175), 2195 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 3175 transitions. [2023-11-23 20:32:32,112 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 3175 transitions. Word has length 54 [2023-11-23 20:32:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:32,112 INFO L495 AbstractCegarLoop]: Abstraction has 2196 states and 3175 transitions. [2023-11-23 20:32:32,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 3175 transitions. [2023-11-23 20:32:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 20:32:32,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:32,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:32,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:32:32,115 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:32,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2099566398, now seen corresponding path program 1 times [2023-11-23 20:32:32,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:32,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767836732] [2023-11-23 20:32:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:32,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:33,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:33,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767836732] [2023-11-23 20:32:33,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767836732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:33,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:33,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-23 20:32:33,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086675190] [2023-11-23 20:32:33,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:33,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 20:32:33,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:33,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 20:32:33,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-23 20:32:33,286 INFO L87 Difference]: Start difference. First operand 2196 states and 3175 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:34,370 INFO L93 Difference]: Finished difference Result 3219 states and 4647 transitions. [2023-11-23 20:32:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:32:34,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-23 20:32:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:34,387 INFO L225 Difference]: With dead ends: 3219 [2023-11-23 20:32:34,388 INFO L226 Difference]: Without dead ends: 2865 [2023-11-23 20:32:34,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-11-23 20:32:34,391 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 484 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:34,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 2055 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:32:34,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2023-11-23 20:32:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2516. [2023-11-23 20:32:34,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2515 states have (on average 1.443737574552684) internal successors, (3631), 2515 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3631 transitions. [2023-11-23 20:32:34,471 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3631 transitions. Word has length 54 [2023-11-23 20:32:34,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:34,472 INFO L495 AbstractCegarLoop]: Abstraction has 2516 states and 3631 transitions. [2023-11-23 20:32:34,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:34,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3631 transitions. [2023-11-23 20:32:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 20:32:34,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:34,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:34,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:32:34,474 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:34,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1215036740, now seen corresponding path program 1 times [2023-11-23 20:32:34,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:34,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82511412] [2023-11-23 20:32:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:34,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:34,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:34,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82511412] [2023-11-23 20:32:34,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82511412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:34,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:34,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:32:34,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080660754] [2023-11-23 20:32:34,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:34,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:32:34,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:34,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:32:34,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:34,595 INFO L87 Difference]: Start difference. First operand 2516 states and 3631 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:34,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:34,734 INFO L93 Difference]: Finished difference Result 3830 states and 5552 transitions. [2023-11-23 20:32:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:32:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-23 20:32:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:34,748 INFO L225 Difference]: With dead ends: 3830 [2023-11-23 20:32:34,748 INFO L226 Difference]: Without dead ends: 2516 [2023-11-23 20:32:34,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:32:34,754 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 341 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:34,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 130 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:34,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2023-11-23 20:32:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2516. [2023-11-23 20:32:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2515 states have (on average 1.4433399602385686) internal successors, (3630), 2515 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:34,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3630 transitions. [2023-11-23 20:32:34,824 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3630 transitions. Word has length 54 [2023-11-23 20:32:34,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:34,824 INFO L495 AbstractCegarLoop]: Abstraction has 2516 states and 3630 transitions. [2023-11-23 20:32:34,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:34,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3630 transitions. [2023-11-23 20:32:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 20:32:34,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:34,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:34,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 20:32:34,826 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:34,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:34,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1254601234, now seen corresponding path program 1 times [2023-11-23 20:32:34,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:34,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101204293] [2023-11-23 20:32:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:34,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:36,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:36,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101204293] [2023-11-23 20:32:36,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101204293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:36,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:36,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-23 20:32:36,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497217056] [2023-11-23 20:32:36,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:36,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 20:32:36,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:36,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 20:32:36,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-23 20:32:36,005 INFO L87 Difference]: Start difference. First operand 2516 states and 3630 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:37,212 INFO L93 Difference]: Finished difference Result 4743 states and 6892 transitions. [2023-11-23 20:32:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:32:37,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-23 20:32:37,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:37,244 INFO L225 Difference]: With dead ends: 4743 [2023-11-23 20:32:37,244 INFO L226 Difference]: Without dead ends: 4741 [2023-11-23 20:32:37,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-11-23 20:32:37,247 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 435 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:37,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 1590 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 20:32:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4741 states. [2023-11-23 20:32:37,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4741 to 2961. [2023-11-23 20:32:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2960 states have (on average 1.4469594594594595) internal successors, (4283), 2960 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 4283 transitions. [2023-11-23 20:32:37,364 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 4283 transitions. Word has length 55 [2023-11-23 20:32:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:37,364 INFO L495 AbstractCegarLoop]: Abstraction has 2961 states and 4283 transitions. [2023-11-23 20:32:37,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 4283 transitions. [2023-11-23 20:32:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 20:32:37,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:37,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:37,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 20:32:37,367 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:37,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:37,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1754944274, now seen corresponding path program 1 times [2023-11-23 20:32:37,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:37,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568552194] [2023-11-23 20:32:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:37,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:40,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:40,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568552194] [2023-11-23 20:32:40,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568552194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:40,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:40,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-11-23 20:32:40,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987881732] [2023-11-23 20:32:40,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:40,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 20:32:40,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:40,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 20:32:40,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2023-11-23 20:32:40,644 INFO L87 Difference]: Start difference. First operand 2961 states and 4283 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:45,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:45,198 INFO L93 Difference]: Finished difference Result 3320 states and 4781 transitions. [2023-11-23 20:32:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-23 20:32:45,200 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-23 20:32:45,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:45,221 INFO L225 Difference]: With dead ends: 3320 [2023-11-23 20:32:45,221 INFO L226 Difference]: Without dead ends: 3318 [2023-11-23 20:32:45,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=390, Invalid=1680, Unknown=0, NotChecked=0, Total=2070 [2023-11-23 20:32:45,225 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 1135 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:45,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 1471 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2440 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-23 20:32:45,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2023-11-23 20:32:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2961. [2023-11-23 20:32:45,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2960 states have (on average 1.4469594594594595) internal successors, (4283), 2960 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 4283 transitions. [2023-11-23 20:32:45,313 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 4283 transitions. Word has length 56 [2023-11-23 20:32:45,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:45,313 INFO L495 AbstractCegarLoop]: Abstraction has 2961 states and 4283 transitions. [2023-11-23 20:32:45,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:45,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 4283 transitions. [2023-11-23 20:32:45,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 20:32:45,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:45,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:45,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 20:32:45,316 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:45,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:45,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1766748366, now seen corresponding path program 1 times [2023-11-23 20:32:45,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:45,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309679307] [2023-11-23 20:32:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:45,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:47,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:47,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309679307] [2023-11-23 20:32:47,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309679307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:47,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:47,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-11-23 20:32:47,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803454757] [2023-11-23 20:32:47,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:47,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 20:32:47,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:47,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 20:32:47,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-11-23 20:32:47,547 INFO L87 Difference]: Start difference. First operand 2961 states and 4283 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:50,802 INFO L93 Difference]: Finished difference Result 4014 states and 5789 transitions. [2023-11-23 20:32:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 20:32:50,804 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-23 20:32:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:50,830 INFO L225 Difference]: With dead ends: 4014 [2023-11-23 20:32:50,830 INFO L226 Difference]: Without dead ends: 3660 [2023-11-23 20:32:50,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 20:32:50,834 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 964 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:50,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 1631 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 20:32:50,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2023-11-23 20:32:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 2961. [2023-11-23 20:32:50,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2960 states have (on average 1.4469594594594595) internal successors, (4283), 2960 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 4283 transitions. [2023-11-23 20:32:50,924 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 4283 transitions. Word has length 56 [2023-11-23 20:32:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:50,924 INFO L495 AbstractCegarLoop]: Abstraction has 2961 states and 4283 transitions. [2023-11-23 20:32:50,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 4283 transitions. [2023-11-23 20:32:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 20:32:50,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:50,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:50,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 20:32:50,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:50,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:50,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1131304690, now seen corresponding path program 1 times [2023-11-23 20:32:50,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:50,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407384271] [2023-11-23 20:32:50,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:50,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:52,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:52,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407384271] [2023-11-23 20:32:52,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407384271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:52,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:52,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-23 20:32:52,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831581930] [2023-11-23 20:32:52,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:52,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 20:32:52,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:52,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 20:32:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:32:52,382 INFO L87 Difference]: Start difference. First operand 2961 states and 4283 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:53,405 INFO L93 Difference]: Finished difference Result 3503 states and 5042 transitions. [2023-11-23 20:32:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 20:32:53,406 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-23 20:32:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:53,416 INFO L225 Difference]: With dead ends: 3503 [2023-11-23 20:32:53,417 INFO L226 Difference]: Without dead ends: 3501 [2023-11-23 20:32:53,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2023-11-23 20:32:53,420 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 432 mSDsluCounter, 1450 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:53,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 1684 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:32:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2023-11-23 20:32:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 2970. [2023-11-23 20:32:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 1.445941394408892) internal successors, (4293), 2969 states have internal predecessors, (4293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 4293 transitions. [2023-11-23 20:32:53,494 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 4293 transitions. Word has length 56 [2023-11-23 20:32:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:53,494 INFO L495 AbstractCegarLoop]: Abstraction has 2970 states and 4293 transitions. [2023-11-23 20:32:53,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 4293 transitions. [2023-11-23 20:32:53,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 20:32:53,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:53,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:53,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 20:32:53,497 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:53,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:53,498 INFO L85 PathProgramCache]: Analyzing trace with hash -865331710, now seen corresponding path program 1 times [2023-11-23 20:32:53,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:53,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048261011] [2023-11-23 20:32:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:53,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:53,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:53,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048261011] [2023-11-23 20:32:53,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048261011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:53,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:53,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:53,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554759767] [2023-11-23 20:32:53,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:53,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:53,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:53,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:53,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:53,565 INFO L87 Difference]: Start difference. First operand 2970 states and 4293 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:53,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:53,662 INFO L93 Difference]: Finished difference Result 5059 states and 7364 transitions. [2023-11-23 20:32:53,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:53,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-23 20:32:53,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:53,687 INFO L225 Difference]: With dead ends: 5059 [2023-11-23 20:32:53,687 INFO L226 Difference]: Without dead ends: 2881 [2023-11-23 20:32:53,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:53,691 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 96 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:53,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 267 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2023-11-23 20:32:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2857. [2023-11-23 20:32:53,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 2856 states have (on average 1.4432773109243697) internal successors, (4122), 2856 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 4122 transitions. [2023-11-23 20:32:53,789 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 4122 transitions. Word has length 57 [2023-11-23 20:32:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:53,790 INFO L495 AbstractCegarLoop]: Abstraction has 2857 states and 4122 transitions. [2023-11-23 20:32:53,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 4122 transitions. [2023-11-23 20:32:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 20:32:53,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:53,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:53,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 20:32:53,793 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:53,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:53,794 INFO L85 PathProgramCache]: Analyzing trace with hash 303464293, now seen corresponding path program 1 times [2023-11-23 20:32:53,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:53,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610008091] [2023-11-23 20:32:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:53,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:53,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:53,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610008091] [2023-11-23 20:32:53,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610008091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:53,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:53,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:53,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073231449] [2023-11-23 20:32:53,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:53,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:53,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:53,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:53,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:53,860 INFO L87 Difference]: Start difference. First operand 2857 states and 4122 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:53,942 INFO L93 Difference]: Finished difference Result 4737 states and 6878 transitions. [2023-11-23 20:32:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:53,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-23 20:32:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:53,950 INFO L225 Difference]: With dead ends: 4737 [2023-11-23 20:32:53,950 INFO L226 Difference]: Without dead ends: 2743 [2023-11-23 20:32:53,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:53,955 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 95 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:53,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 259 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2023-11-23 20:32:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2741. [2023-11-23 20:32:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2740 states have (on average 1.4408759124087591) internal successors, (3948), 2740 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 3948 transitions. [2023-11-23 20:32:54,033 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 3948 transitions. Word has length 57 [2023-11-23 20:32:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:54,034 INFO L495 AbstractCegarLoop]: Abstraction has 2741 states and 3948 transitions. [2023-11-23 20:32:54,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 3948 transitions. [2023-11-23 20:32:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 20:32:54,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:54,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:54,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 20:32:54,037 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:54,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:54,038 INFO L85 PathProgramCache]: Analyzing trace with hash -577350992, now seen corresponding path program 1 times [2023-11-23 20:32:54,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:54,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000500238] [2023-11-23 20:32:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:54,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:54,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:54,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000500238] [2023-11-23 20:32:54,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000500238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:54,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:54,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:54,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859219605] [2023-11-23 20:32:54,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:54,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:54,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:54,100 INFO L87 Difference]: Start difference. First operand 2741 states and 3948 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:54,181 INFO L93 Difference]: Finished difference Result 4497 states and 6528 transitions. [2023-11-23 20:32:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:54,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-23 20:32:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:54,188 INFO L225 Difference]: With dead ends: 4497 [2023-11-23 20:32:54,189 INFO L226 Difference]: Without dead ends: 2601 [2023-11-23 20:32:54,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:54,195 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 96 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:54,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 251 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:54,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2023-11-23 20:32:54,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2599. [2023-11-23 20:32:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2598 states have (on average 1.441493456505004) internal successors, (3745), 2598 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3745 transitions. [2023-11-23 20:32:54,253 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3745 transitions. Word has length 57 [2023-11-23 20:32:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:54,253 INFO L495 AbstractCegarLoop]: Abstraction has 2599 states and 3745 transitions. [2023-11-23 20:32:54,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3745 transitions. [2023-11-23 20:32:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 20:32:54,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:54,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:54,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 20:32:54,255 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:54,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1261264414, now seen corresponding path program 1 times [2023-11-23 20:32:54,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:54,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031457036] [2023-11-23 20:32:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:54,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:55,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:55,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031457036] [2023-11-23 20:32:55,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031457036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:55,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:55,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-23 20:32:55,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259921113] [2023-11-23 20:32:55,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:55,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 20:32:55,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:55,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 20:32:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:32:55,717 INFO L87 Difference]: Start difference. First operand 2599 states and 3745 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:56,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:56,492 INFO L93 Difference]: Finished difference Result 4606 states and 6651 transitions. [2023-11-23 20:32:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 20:32:56,493 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-23 20:32:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:56,504 INFO L225 Difference]: With dead ends: 4606 [2023-11-23 20:32:56,504 INFO L226 Difference]: Without dead ends: 4604 [2023-11-23 20:32:56,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2023-11-23 20:32:56,508 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 357 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:56,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 789 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:32:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2023-11-23 20:32:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 2589. [2023-11-23 20:32:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 2588 states have (on average 1.4431993817619784) internal successors, (3735), 2588 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3735 transitions. [2023-11-23 20:32:56,581 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3735 transitions. Word has length 57 [2023-11-23 20:32:56,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:56,581 INFO L495 AbstractCegarLoop]: Abstraction has 2589 states and 3735 transitions. [2023-11-23 20:32:56,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:56,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3735 transitions. [2023-11-23 20:32:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 20:32:56,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:56,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:56,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 20:32:56,583 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:56,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:56,584 INFO L85 PathProgramCache]: Analyzing trace with hash -998317662, now seen corresponding path program 1 times [2023-11-23 20:32:56,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:56,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587942032] [2023-11-23 20:32:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:56,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:57,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:57,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587942032] [2023-11-23 20:32:57,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587942032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:57,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:57,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-23 20:32:57,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153260666] [2023-11-23 20:32:57,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:57,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 20:32:57,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:57,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 20:32:57,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:32:57,921 INFO L87 Difference]: Start difference. First operand 2589 states and 3735 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:59,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:59,073 INFO L93 Difference]: Finished difference Result 4308 states and 6209 transitions. [2023-11-23 20:32:59,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 20:32:59,074 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-23 20:32:59,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:59,086 INFO L225 Difference]: With dead ends: 4308 [2023-11-23 20:32:59,086 INFO L226 Difference]: Without dead ends: 4306 [2023-11-23 20:32:59,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2023-11-23 20:32:59,089 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 421 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:59,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 1737 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:32:59,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2023-11-23 20:32:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 2589. [2023-11-23 20:32:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 2588 states have (on average 1.4431993817619784) internal successors, (3735), 2588 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3735 transitions. [2023-11-23 20:32:59,157 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3735 transitions. Word has length 57 [2023-11-23 20:32:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:59,157 INFO L495 AbstractCegarLoop]: Abstraction has 2589 states and 3735 transitions. [2023-11-23 20:32:59,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3735 transitions. [2023-11-23 20:32:59,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 20:32:59,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:59,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:59,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-23 20:32:59,160 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:59,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:59,161 INFO L85 PathProgramCache]: Analyzing trace with hash -225043006, now seen corresponding path program 1 times [2023-11-23 20:32:59,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:59,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501370311] [2023-11-23 20:32:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:59,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:00,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:00,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501370311] [2023-11-23 20:33:00,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501370311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:00,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:00,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-23 20:33:00,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280366775] [2023-11-23 20:33:00,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:00,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 20:33:00,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:00,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 20:33:00,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:33:00,335 INFO L87 Difference]: Start difference. First operand 2589 states and 3735 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:01,245 INFO L93 Difference]: Finished difference Result 5666 states and 8198 transitions. [2023-11-23 20:33:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 20:33:01,246 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-23 20:33:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:01,254 INFO L225 Difference]: With dead ends: 5666 [2023-11-23 20:33:01,254 INFO L226 Difference]: Without dead ends: 5024 [2023-11-23 20:33:01,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2023-11-23 20:33:01,259 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 427 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:01,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 1806 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:33:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5024 states. [2023-11-23 20:33:01,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5024 to 2853. [2023-11-23 20:33:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 1.437938288920056) internal successors, (4101), 2852 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 4101 transitions. [2023-11-23 20:33:01,331 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 4101 transitions. Word has length 57 [2023-11-23 20:33:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:01,331 INFO L495 AbstractCegarLoop]: Abstraction has 2853 states and 4101 transitions. [2023-11-23 20:33:01,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 4101 transitions. [2023-11-23 20:33:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 20:33:01,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:01,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:01,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-23 20:33:01,333 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:01,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:01,334 INFO L85 PathProgramCache]: Analyzing trace with hash 749527526, now seen corresponding path program 1 times [2023-11-23 20:33:01,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:01,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701843989] [2023-11-23 20:33:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:01,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat