./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh --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 ccd47f3526eef69b5bf2f51fee8d66c64e4c81e1dda46c7d333fbe79bb4350dd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:29:19,057 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:29:19,120 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:29:19,125 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:29:19,125 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:29:19,150 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:29:19,150 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:29:19,151 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:29:19,152 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:29:19,152 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:29:19,153 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:29:19,153 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:29:19,154 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:29:19,154 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:29:19,155 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:29:19,155 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:29:19,156 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:29:19,156 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:29:19,157 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:29:19,157 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:29:19,158 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:29:19,159 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:29:19,160 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:29:19,160 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:29:19,161 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:29:19,161 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:29:19,161 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:29:19,162 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:29:19,162 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:29:19,163 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:29:19,163 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:29:19,164 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:29:19,164 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:29:19,164 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:29:19,164 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:29:19,165 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:29:19,165 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:29:19,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:29:19,165 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:29:19,165 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:29:19,166 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:29:19,166 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:29:19,166 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:29:19,166 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:29:19,166 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:29:19,167 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:29:19,167 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:29:19,167 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_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccd47f3526eef69b5bf2f51fee8d66c64e4c81e1dda46c7d333fbe79bb4350dd [2023-12-02 17:29:19,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:29:19,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:29:19,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:29:19,389 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:29:19,389 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:29:19,390 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-12-02 17:29:22,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:29:22,314 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:29:22,315 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-12-02 17:29:22,328 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/data/24b9e7ca7/e76daa1846d24df8aca22618a273e511/FLAG89ce11d2e [2023-12-02 17:29:22,342 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/data/24b9e7ca7/e76daa1846d24df8aca22618a273e511 [2023-12-02 17:29:22,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:29:22,346 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:29:22,348 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:29:22,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:29:22,353 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:29:22,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9b200f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22, skipping insertion in model container [2023-12-02 17:29:22,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,415 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:29:22,631 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_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2023-12-02 17:29:22,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:29:22,700 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:29:22,757 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_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2023-12-02 17:29:22,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:29:22,804 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:29:22,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22 WrapperNode [2023-12-02 17:29:22,805 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:29:22,806 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:29:22,806 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:29:22,806 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:29:22,811 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,826 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,874 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 871 [2023-12-02 17:29:22,875 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:29:22,875 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:29:22,876 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:29:22,876 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:29:22,883 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,888 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,888 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,905 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,913 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,917 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,921 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,927 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:29:22,928 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:29:22,928 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:29:22,928 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:29:22,929 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22" (1/1) ... [2023-12-02 17:29:22,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:29:22,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:29:22,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:29:22,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:29:22,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:29:22,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:29:23,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:29:23,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:29:23,125 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:29:23,126 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:29:23,807 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:29:24,010 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:29:24,011 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 17:29:24,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:29:24 BoogieIcfgContainer [2023-12-02 17:29:24,013 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:29:24,015 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:29:24,015 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:29:24,018 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:29:24,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:29:22" (1/3) ... [2023-12-02 17:29:24,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217bd36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:29:24, skipping insertion in model container [2023-12-02 17:29:24,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:22" (2/3) ... [2023-12-02 17:29:24,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217bd36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:29:24, skipping insertion in model container [2023-12-02 17:29:24,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:29:24" (3/3) ... [2023-12-02 17:29:24,021 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-12-02 17:29:24,041 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:29:24,041 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:29:24,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:29:24,102 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;@4aeb55ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:29:24,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:29:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 163 states have (on average 1.705521472392638) internal successors, (278), 164 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:24,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 17:29:24,117 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:24,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:24,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:24,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash 224703188, now seen corresponding path program 1 times [2023-12-02 17:29:24,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:24,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199242578] [2023-12-02 17:29:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:24,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:24,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:24,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199242578] [2023-12-02 17:29:24,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199242578] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:24,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:24,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 17:29:24,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836061424] [2023-12-02 17:29:24,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:24,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:29:24,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:24,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:29:24,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:29:24,768 INFO L87 Difference]: Start difference. First operand has 165 states, 163 states have (on average 1.705521472392638) internal successors, (278), 164 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:25,139 INFO L93 Difference]: Finished difference Result 577 states and 924 transitions. [2023-12-02 17:29:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:29:25,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-12-02 17:29:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:25,157 INFO L225 Difference]: With dead ends: 577 [2023-12-02 17:29:25,157 INFO L226 Difference]: Without dead ends: 480 [2023-12-02 17:29:25,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:29:25,164 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 842 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:25,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1146 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:29:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-12-02 17:29:25,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 472. [2023-12-02 17:29:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.40552016985138) internal successors, (662), 471 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 662 transitions. [2023-12-02 17:29:25,234 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 662 transitions. Word has length 68 [2023-12-02 17:29:25,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:25,235 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 662 transitions. [2023-12-02 17:29:25,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:25,235 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 662 transitions. [2023-12-02 17:29:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:29:25,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:25,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:25,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:29:25,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:25,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash 884200359, now seen corresponding path program 1 times [2023-12-02 17:29:25,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:25,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3965452] [2023-12-02 17:29:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:25,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:25,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:25,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3965452] [2023-12-02 17:29:25,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3965452] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:25,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:25,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:29:25,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348921602] [2023-12-02 17:29:25,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:25,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:29:25,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:29:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:29:25,412 INFO L87 Difference]: Start difference. First operand 472 states and 662 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:25,670 INFO L93 Difference]: Finished difference Result 1132 states and 1626 transitions. [2023-12-02 17:29:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:29:25,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-12-02 17:29:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:25,675 INFO L225 Difference]: With dead ends: 1132 [2023-12-02 17:29:25,675 INFO L226 Difference]: Without dead ends: 702 [2023-12-02 17:29:25,678 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 [2023-12-02 17:29:25,679 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 597 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:25,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 224 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:29:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-12-02 17:29:25,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 700. [2023-12-02 17:29:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 1.4291845493562232) internal successors, (999), 699 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 999 transitions. [2023-12-02 17:29:25,710 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 999 transitions. Word has length 69 [2023-12-02 17:29:25,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:25,710 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 999 transitions. [2023-12-02 17:29:25,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:25,711 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 999 transitions. [2023-12-02 17:29:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:29:25,713 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:25,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:25,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:29:25,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:25,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:25,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1505411510, now seen corresponding path program 1 times [2023-12-02 17:29:25,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:25,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522452849] [2023-12-02 17:29:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:25,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:25,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:25,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522452849] [2023-12-02 17:29:25,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522452849] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:25,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:25,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:29:25,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934514142] [2023-12-02 17:29:25,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:25,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:29:25,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:29:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:29:25,879 INFO L87 Difference]: Start difference. First operand 700 states and 999 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:26,137 INFO L93 Difference]: Finished difference Result 1847 states and 2690 transitions. [2023-12-02 17:29:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:29:26,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-12-02 17:29:26,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:26,144 INFO L225 Difference]: With dead ends: 1847 [2023-12-02 17:29:26,144 INFO L226 Difference]: Without dead ends: 1205 [2023-12-02 17:29:26,146 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 [2023-12-02 17:29:26,147 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 580 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:26,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 232 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:29:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2023-12-02 17:29:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1203. [2023-12-02 17:29:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.4467554076539102) internal successors, (1739), 1202 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1739 transitions. [2023-12-02 17:29:26,172 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1739 transitions. Word has length 69 [2023-12-02 17:29:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:26,173 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 1739 transitions. [2023-12-02 17:29:26,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1739 transitions. [2023-12-02 17:29:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:29:26,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:26,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:26,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:29:26,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:26,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:26,176 INFO L85 PathProgramCache]: Analyzing trace with hash -118029819, now seen corresponding path program 1 times [2023-12-02 17:29:26,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:26,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769775660] [2023-12-02 17:29:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:26,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:26,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:26,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769775660] [2023-12-02 17:29:26,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769775660] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:26,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:26,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:29:26,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895797229] [2023-12-02 17:29:26,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:26,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:29:26,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:26,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:29:26,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:29:26,304 INFO L87 Difference]: Start difference. First operand 1203 states and 1739 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:26,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:26,559 INFO L93 Difference]: Finished difference Result 3333 states and 4883 transitions. [2023-12-02 17:29:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:29:26,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-12-02 17:29:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:26,569 INFO L225 Difference]: With dead ends: 3333 [2023-12-02 17:29:26,570 INFO L226 Difference]: Without dead ends: 2211 [2023-12-02 17:29:26,571 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 [2023-12-02 17:29:26,573 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 563 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:26,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 240 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:29:26,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2023-12-02 17:29:26,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2209. [2023-12-02 17:29:26,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 1.453804347826087) internal successors, (3210), 2208 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3210 transitions. [2023-12-02 17:29:26,623 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3210 transitions. Word has length 69 [2023-12-02 17:29:26,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:26,624 INFO L495 AbstractCegarLoop]: Abstraction has 2209 states and 3210 transitions. [2023-12-02 17:29:26,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:26,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3210 transitions. [2023-12-02 17:29:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:29:26,626 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:26,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:26,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:29:26,626 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:26,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:26,627 INFO L85 PathProgramCache]: Analyzing trace with hash 617813140, now seen corresponding path program 1 times [2023-12-02 17:29:26,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:26,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220413497] [2023-12-02 17:29:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:26,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:26,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:26,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220413497] [2023-12-02 17:29:26,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220413497] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:26,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:26,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:29:26,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308451595] [2023-12-02 17:29:26,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:26,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:29:26,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:26,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:29:26,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:29:26,750 INFO L87 Difference]: Start difference. First operand 2209 states and 3210 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:26,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:26,980 INFO L93 Difference]: Finished difference Result 6321 states and 9261 transitions. [2023-12-02 17:29:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:29:26,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-12-02 17:29:26,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:26,999 INFO L225 Difference]: With dead ends: 6321 [2023-12-02 17:29:26,999 INFO L226 Difference]: Without dead ends: 4223 [2023-12-02 17:29:27,002 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 [2023-12-02 17:29:27,003 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 546 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:27,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 248 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:29:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2023-12-02 17:29:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4221. [2023-12-02 17:29:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4220 states have (on average 1.454265402843602) internal successors, (6137), 4220 states have internal predecessors, (6137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 6137 transitions. [2023-12-02 17:29:27,104 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 6137 transitions. Word has length 69 [2023-12-02 17:29:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:27,105 INFO L495 AbstractCegarLoop]: Abstraction has 4221 states and 6137 transitions. [2023-12-02 17:29:27,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 6137 transitions. [2023-12-02 17:29:27,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:29:27,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:27,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:27,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:29:27,106 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:27,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:27,107 INFO L85 PathProgramCache]: Analyzing trace with hash -475432605, now seen corresponding path program 1 times [2023-12-02 17:29:27,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:27,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180118495] [2023-12-02 17:29:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:27,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:27,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:27,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180118495] [2023-12-02 17:29:27,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180118495] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:27,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:27,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:29:27,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488964380] [2023-12-02 17:29:27,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:27,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:29:27,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:27,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:29:27,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:29:27,232 INFO L87 Difference]: Start difference. First operand 4221 states and 6137 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:27,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:27,465 INFO L93 Difference]: Finished difference Result 12323 states and 18005 transitions. [2023-12-02 17:29:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:29:27,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-12-02 17:29:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:27,509 INFO L225 Difference]: With dead ends: 12323 [2023-12-02 17:29:27,509 INFO L226 Difference]: Without dead ends: 8247 [2023-12-02 17:29:27,515 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 [2023-12-02 17:29:27,516 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 564 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:27,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 249 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:29:27,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2023-12-02 17:29:27,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 8245. [2023-12-02 17:29:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8245 states, 8244 states have (on average 1.4517224648229015) internal successors, (11968), 8244 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8245 states to 8245 states and 11968 transitions. [2023-12-02 17:29:27,740 INFO L78 Accepts]: Start accepts. Automaton has 8245 states and 11968 transitions. Word has length 69 [2023-12-02 17:29:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:27,740 INFO L495 AbstractCegarLoop]: Abstraction has 8245 states and 11968 transitions. [2023-12-02 17:29:27,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 8245 states and 11968 transitions. [2023-12-02 17:29:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 17:29:27,741 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:27,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:27,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:29:27,742 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:27,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2008266504, now seen corresponding path program 1 times [2023-12-02 17:29:27,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:27,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346882569] [2023-12-02 17:29:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:27,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:30,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346882569] [2023-12-02 17:29:30,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346882569] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:30,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:30,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-12-02 17:29:30,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808071695] [2023-12-02 17:29:30,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:30,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 17:29:30,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:30,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 17:29:30,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:29:30,255 INFO L87 Difference]: Start difference. First operand 8245 states and 11968 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:33,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:33,698 INFO L93 Difference]: Finished difference Result 21235 states and 30788 transitions. [2023-12-02 17:29:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:29:33,699 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-12-02 17:29:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:33,759 INFO L225 Difference]: With dead ends: 21235 [2023-12-02 17:29:33,759 INFO L226 Difference]: Without dead ends: 21233 [2023-12-02 17:29:33,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=576, Invalid=1874, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 17:29:33,765 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 1552 mSDsluCounter, 2001 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 2494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:33,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1552 Valid, 2186 Invalid, 2494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 17:29:33,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21233 states. [2023-12-02 17:29:33,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21233 to 16308. [2023-12-02 17:29:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16308 states, 16307 states have (on average 1.4463727233703318) internal successors, (23586), 16307 states have internal predecessors, (23586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16308 states to 16308 states and 23586 transitions. [2023-12-02 17:29:34,042 INFO L78 Accepts]: Start accepts. Automaton has 16308 states and 23586 transitions. Word has length 70 [2023-12-02 17:29:34,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:34,043 INFO L495 AbstractCegarLoop]: Abstraction has 16308 states and 23586 transitions. [2023-12-02 17:29:34,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 16308 states and 23586 transitions. [2023-12-02 17:29:34,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 17:29:34,044 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:34,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:34,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 17:29:34,044 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:34,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:34,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1687651048, now seen corresponding path program 1 times [2023-12-02 17:29:34,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:34,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795798714] [2023-12-02 17:29:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:34,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:35,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:35,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795798714] [2023-12-02 17:29:35,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795798714] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:35,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:35,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-12-02 17:29:35,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880640330] [2023-12-02 17:29:35,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:35,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:29:35,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:35,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:29:35,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:29:35,242 INFO L87 Difference]: Start difference. First operand 16308 states and 23586 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:36,181 INFO L93 Difference]: Finished difference Result 26669 states and 38562 transitions. [2023-12-02 17:29:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 17:29:36,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-12-02 17:29:36,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:36,240 INFO L225 Difference]: With dead ends: 26669 [2023-12-02 17:29:36,241 INFO L226 Difference]: Without dead ends: 26667 [2023-12-02 17:29:36,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=684, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:29:36,246 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1156 mSDsluCounter, 2284 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 2639 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:36,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 2639 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:29:36,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26667 states. [2023-12-02 17:29:36,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26667 to 16337. [2023-12-02 17:29:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16337 states, 16336 states have (on average 1.4460700293829578) internal successors, (23623), 16336 states have internal predecessors, (23623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16337 states to 16337 states and 23623 transitions. [2023-12-02 17:29:36,593 INFO L78 Accepts]: Start accepts. Automaton has 16337 states and 23623 transitions. Word has length 70 [2023-12-02 17:29:36,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:36,594 INFO L495 AbstractCegarLoop]: Abstraction has 16337 states and 23623 transitions. [2023-12-02 17:29:36,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 16337 states and 23623 transitions. [2023-12-02 17:29:36,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 17:29:36,596 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:36,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:36,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 17:29:36,596 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:36,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:36,597 INFO L85 PathProgramCache]: Analyzing trace with hash -793078072, now seen corresponding path program 1 times [2023-12-02 17:29:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:36,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337117541] [2023-12-02 17:29:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:36,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:37,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:37,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337117541] [2023-12-02 17:29:37,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337117541] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:37,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:37,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-12-02 17:29:37,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721071451] [2023-12-02 17:29:37,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:37,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:29:37,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:29:37,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:29:37,924 INFO L87 Difference]: Start difference. First operand 16337 states and 23623 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:38,973 INFO L93 Difference]: Finished difference Result 23982 states and 34637 transitions. [2023-12-02 17:29:38,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 17:29:38,974 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-12-02 17:29:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:38,996 INFO L225 Difference]: With dead ends: 23982 [2023-12-02 17:29:38,996 INFO L226 Difference]: Without dead ends: 23980 [2023-12-02 17:29:39,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:29:39,002 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1078 mSDsluCounter, 2269 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 2624 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:39,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 2624 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:29:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23980 states. [2023-12-02 17:29:39,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23980 to 16363. [2023-12-02 17:29:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16363 states, 16362 states have (on average 1.4457890233467792) internal successors, (23656), 16362 states have internal predecessors, (23656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16363 states to 16363 states and 23656 transitions. [2023-12-02 17:29:39,248 INFO L78 Accepts]: Start accepts. Automaton has 16363 states and 23656 transitions. Word has length 70 [2023-12-02 17:29:39,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:39,249 INFO L495 AbstractCegarLoop]: Abstraction has 16363 states and 23656 transitions. [2023-12-02 17:29:39,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:39,249 INFO L276 IsEmpty]: Start isEmpty. Operand 16363 states and 23656 transitions. [2023-12-02 17:29:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 17:29:39,250 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:39,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:39,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 17:29:39,250 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:39,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1678970200, now seen corresponding path program 1 times [2023-12-02 17:29:39,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:39,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954399366] [2023-12-02 17:29:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:39,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:40,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:40,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954399366] [2023-12-02 17:29:40,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954399366] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:40,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:40,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-12-02 17:29:40,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870572831] [2023-12-02 17:29:40,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:40,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:29:40,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:40,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:29:40,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:29:40,538 INFO L87 Difference]: Start difference. First operand 16363 states and 23656 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:41,351 INFO L93 Difference]: Finished difference Result 21758 states and 31382 transitions. [2023-12-02 17:29:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 17:29:41,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-12-02 17:29:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:41,382 INFO L225 Difference]: With dead ends: 21758 [2023-12-02 17:29:41,382 INFO L226 Difference]: Without dead ends: 19708 [2023-12-02 17:29:41,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:29:41,389 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 878 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 2589 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:41,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 2589 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:29:41,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19708 states. [2023-12-02 17:29:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19708 to 18239. [2023-12-02 17:29:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18239 states, 18238 states have (on average 1.4435793398398946) internal successors, (26328), 18238 states have internal predecessors, (26328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18239 states to 18239 states and 26328 transitions. [2023-12-02 17:29:41,647 INFO L78 Accepts]: Start accepts. Automaton has 18239 states and 26328 transitions. Word has length 70 [2023-12-02 17:29:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:41,648 INFO L495 AbstractCegarLoop]: Abstraction has 18239 states and 26328 transitions. [2023-12-02 17:29:41,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 18239 states and 26328 transitions. [2023-12-02 17:29:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 17:29:41,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:41,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:41,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 17:29:41,650 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:41,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:41,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1677629064, now seen corresponding path program 1 times [2023-12-02 17:29:41,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:41,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512036543] [2023-12-02 17:29:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:42,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:42,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512036543] [2023-12-02 17:29:42,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512036543] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:42,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:42,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:29:42,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777357029] [2023-12-02 17:29:42,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:42,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:29:42,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:42,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:29:42,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:29:42,918 INFO L87 Difference]: Start difference. First operand 18239 states and 26328 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:43,978 INFO L93 Difference]: Finished difference Result 35125 states and 50674 transitions. [2023-12-02 17:29:43,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 17:29:43,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-12-02 17:29:43,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:44,017 INFO L225 Difference]: With dead ends: 35125 [2023-12-02 17:29:44,017 INFO L226 Difference]: Without dead ends: 35123 [2023-12-02 17:29:44,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:29:44,026 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1205 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 2588 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:44,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 2588 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:29:44,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35123 states. [2023-12-02 17:29:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35123 to 18276. [2023-12-02 17:29:44,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18276 states, 18275 states have (on average 1.4429548563611492) internal successors, (26370), 18275 states have internal predecessors, (26370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:44,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18276 states to 18276 states and 26370 transitions. [2023-12-02 17:29:44,283 INFO L78 Accepts]: Start accepts. Automaton has 18276 states and 26370 transitions. Word has length 70 [2023-12-02 17:29:44,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:44,284 INFO L495 AbstractCegarLoop]: Abstraction has 18276 states and 26370 transitions. [2023-12-02 17:29:44,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:44,284 INFO L276 IsEmpty]: Start isEmpty. Operand 18276 states and 26370 transitions. [2023-12-02 17:29:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:29:44,285 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:44,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:44,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 17:29:44,285 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:44,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:44,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2000046620, now seen corresponding path program 1 times [2023-12-02 17:29:44,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:44,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286030114] [2023-12-02 17:29:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:44,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:45,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:45,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286030114] [2023-12-02 17:29:45,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286030114] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:45,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:45,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:29:45,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852185815] [2023-12-02 17:29:45,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:45,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:29:45,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:45,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:29:45,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:29:45,714 INFO L87 Difference]: Start difference. First operand 18276 states and 26370 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:47,292 INFO L93 Difference]: Finished difference Result 35148 states and 50696 transitions. [2023-12-02 17:29:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 17:29:47,293 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:29:47,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:47,329 INFO L225 Difference]: With dead ends: 35148 [2023-12-02 17:29:47,329 INFO L226 Difference]: Without dead ends: 35146 [2023-12-02 17:29:47,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:29:47,338 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 908 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1985 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:47,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1985 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:29:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35146 states. [2023-12-02 17:29:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35146 to 18280. [2023-12-02 17:29:47,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18280 states, 18279 states have (on average 1.4429673395699985) internal successors, (26376), 18279 states have internal predecessors, (26376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:47,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18280 states to 18280 states and 26376 transitions. [2023-12-02 17:29:47,672 INFO L78 Accepts]: Start accepts. Automaton has 18280 states and 26376 transitions. Word has length 72 [2023-12-02 17:29:47,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:47,672 INFO L495 AbstractCegarLoop]: Abstraction has 18280 states and 26376 transitions. [2023-12-02 17:29:47,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:47,672 INFO L276 IsEmpty]: Start isEmpty. Operand 18280 states and 26376 transitions. [2023-12-02 17:29:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:29:47,673 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:47,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:47,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 17:29:47,674 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:47,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:47,674 INFO L85 PathProgramCache]: Analyzing trace with hash -480682500, now seen corresponding path program 1 times [2023-12-02 17:29:47,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:47,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3676177] [2023-12-02 17:29:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:47,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:49,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:49,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3676177] [2023-12-02 17:29:49,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3676177] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:49,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:49,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-12-02 17:29:49,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318754889] [2023-12-02 17:29:49,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:49,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 17:29:49,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:49,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 17:29:49,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:29:49,057 INFO L87 Difference]: Start difference. First operand 18280 states and 26376 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:51,010 INFO L93 Difference]: Finished difference Result 30761 states and 44317 transitions. [2023-12-02 17:29:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:29:51,011 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:29:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:51,038 INFO L225 Difference]: With dead ends: 30761 [2023-12-02 17:29:51,038 INFO L226 Difference]: Without dead ends: 30759 [2023-12-02 17:29:51,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=378, Invalid=1262, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:29:51,045 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 1426 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1426 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 2225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:51,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1426 Valid, 2059 Invalid, 2225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 17:29:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30759 states. [2023-12-02 17:29:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30759 to 18286. [2023-12-02 17:29:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18286 states, 18285 states have (on average 1.4429313645064261) internal successors, (26384), 18285 states have internal predecessors, (26384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18286 states to 18286 states and 26384 transitions. [2023-12-02 17:29:51,276 INFO L78 Accepts]: Start accepts. Automaton has 18286 states and 26384 transitions. Word has length 72 [2023-12-02 17:29:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:51,276 INFO L495 AbstractCegarLoop]: Abstraction has 18286 states and 26384 transitions. [2023-12-02 17:29:51,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 18286 states and 26384 transitions. [2023-12-02 17:29:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:29:51,277 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:51,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:51,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 17:29:51,277 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:51,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:51,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1366574628, now seen corresponding path program 1 times [2023-12-02 17:29:51,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:51,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627502794] [2023-12-02 17:29:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:51,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:52,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:52,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627502794] [2023-12-02 17:29:52,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627502794] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:52,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:52,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:29:52,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083227745] [2023-12-02 17:29:52,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:52,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:29:52,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:52,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:29:52,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:29:52,332 INFO L87 Difference]: Start difference. First operand 18286 states and 26384 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:53,366 INFO L93 Difference]: Finished difference Result 40392 states and 58300 transitions. [2023-12-02 17:29:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 17:29:53,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:29:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:53,399 INFO L225 Difference]: With dead ends: 40392 [2023-12-02 17:29:53,399 INFO L226 Difference]: Without dead ends: 36294 [2023-12-02 17:29:53,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=284, Invalid=838, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 17:29:53,409 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 1157 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:53,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1157 Valid, 1386 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:29:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36294 states. [2023-12-02 17:29:53,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36294 to 23396. [2023-12-02 17:29:53,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23396 states, 23395 states have (on average 1.4397093396024792) internal successors, (33682), 23395 states have internal predecessors, (33682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23396 states to 23396 states and 33682 transitions. [2023-12-02 17:29:53,680 INFO L78 Accepts]: Start accepts. Automaton has 23396 states and 33682 transitions. Word has length 72 [2023-12-02 17:29:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:53,680 INFO L495 AbstractCegarLoop]: Abstraction has 23396 states and 33682 transitions. [2023-12-02 17:29:53,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 23396 states and 33682 transitions. [2023-12-02 17:29:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:29:53,681 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:53,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:53,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 17:29:53,681 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:53,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1990024636, now seen corresponding path program 1 times [2023-12-02 17:29:53,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:53,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698194805] [2023-12-02 17:29:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:53,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:54,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:54,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698194805] [2023-12-02 17:29:54,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698194805] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:54,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:54,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-12-02 17:29:54,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57580031] [2023-12-02 17:29:54,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:54,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 17:29:54,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 17:29:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-12-02 17:29:54,920 INFO L87 Difference]: Start difference. First operand 23396 states and 33682 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:56,408 INFO L93 Difference]: Finished difference Result 49215 states and 70813 transitions. [2023-12-02 17:29:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 17:29:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:29:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:56,458 INFO L225 Difference]: With dead ends: 49215 [2023-12-02 17:29:56,458 INFO L226 Difference]: Without dead ends: 49213 [2023-12-02 17:29:56,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 17:29:56,469 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1290 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:56,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1290 Valid, 1794 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:29:56,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49213 states. [2023-12-02 17:29:56,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49213 to 23403. [2023-12-02 17:29:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23403 states, 23402 states have (on average 1.439663276643022) internal successors, (33691), 23402 states have internal predecessors, (33691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:56,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23403 states to 23403 states and 33691 transitions. [2023-12-02 17:29:56,802 INFO L78 Accepts]: Start accepts. Automaton has 23403 states and 33691 transitions. Word has length 72 [2023-12-02 17:29:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:56,802 INFO L495 AbstractCegarLoop]: Abstraction has 23403 states and 33691 transitions. [2023-12-02 17:29:56,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:29:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 23403 states and 33691 transitions. [2023-12-02 17:29:56,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:29:56,804 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:56,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:56,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 17:29:56,804 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:56,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash 645509596, now seen corresponding path program 1 times [2023-12-02 17:29:56,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:56,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705021513] [2023-12-02 17:29:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:56,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:29:58,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:58,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705021513] [2023-12-02 17:29:58,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705021513] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:58,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:58,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-12-02 17:29:58,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788020445] [2023-12-02 17:29:58,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:58,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 17:29:58,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:58,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 17:29:58,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-12-02 17:29:58,461 INFO L87 Difference]: Start difference. First operand 23403 states and 33691 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:01,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:01,447 INFO L93 Difference]: Finished difference Result 35860 states and 51601 transitions. [2023-12-02 17:30:01,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 17:30:01,448 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:30:01,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:01,477 INFO L225 Difference]: With dead ends: 35860 [2023-12-02 17:30:01,478 INFO L226 Difference]: Without dead ends: 35858 [2023-12-02 17:30:01,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=410, Invalid=1482, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 17:30:01,483 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 1108 mSDsluCounter, 2297 mSDsCounter, 0 mSdLazyCounter, 3084 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 2526 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:01,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 2526 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 3084 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 17:30:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35858 states. [2023-12-02 17:30:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35858 to 23400. [2023-12-02 17:30:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23400 states, 23399 states have (on average 1.4396769092696269) internal successors, (33687), 23399 states have internal predecessors, (33687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:01,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23400 states to 23400 states and 33687 transitions. [2023-12-02 17:30:01,738 INFO L78 Accepts]: Start accepts. Automaton has 23400 states and 33687 transitions. Word has length 72 [2023-12-02 17:30:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:01,739 INFO L495 AbstractCegarLoop]: Abstraction has 23400 states and 33687 transitions. [2023-12-02 17:30:01,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:01,739 INFO L276 IsEmpty]: Start isEmpty. Operand 23400 states and 33687 transitions. [2023-12-02 17:30:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:30:01,740 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:01,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:01,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 17:30:01,741 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:01,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:01,742 INFO L85 PathProgramCache]: Analyzing trace with hash -240382532, now seen corresponding path program 1 times [2023-12-02 17:30:01,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:01,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090694030] [2023-12-02 17:30:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:01,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:02,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:02,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090694030] [2023-12-02 17:30:02,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090694030] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:02,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:02,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:30:02,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025484231] [2023-12-02 17:30:02,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:02,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:30:02,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:02,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:30:02,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:30:02,927 INFO L87 Difference]: Start difference. First operand 23400 states and 33687 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:03,857 INFO L93 Difference]: Finished difference Result 43169 states and 62124 transitions. [2023-12-02 17:30:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:30:03,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:30:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:03,934 INFO L225 Difference]: With dead ends: 43169 [2023-12-02 17:30:03,934 INFO L226 Difference]: Without dead ends: 39071 [2023-12-02 17:30:03,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:30:03,939 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 938 mSDsluCounter, 2278 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 2624 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:03,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 2624 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:30:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39071 states. [2023-12-02 17:30:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39071 to 23424. [2023-12-02 17:30:04,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23424 states, 23423 states have (on average 1.439482559877044) internal successors, (33717), 23423 states have internal predecessors, (33717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23424 states to 23424 states and 33717 transitions. [2023-12-02 17:30:04,150 INFO L78 Accepts]: Start accepts. Automaton has 23424 states and 33717 transitions. Word has length 72 [2023-12-02 17:30:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:04,150 INFO L495 AbstractCegarLoop]: Abstraction has 23424 states and 33717 transitions. [2023-12-02 17:30:04,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 23424 states and 33717 transitions. [2023-12-02 17:30:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:30:04,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:04,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:04,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 17:30:04,152 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:04,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:04,152 INFO L85 PathProgramCache]: Analyzing trace with hash -514217572, now seen corresponding path program 1 times [2023-12-02 17:30:04,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:04,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607158207] [2023-12-02 17:30:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:04,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:05,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:05,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607158207] [2023-12-02 17:30:05,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607158207] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:05,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:05,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-12-02 17:30:05,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847634644] [2023-12-02 17:30:05,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:05,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:30:05,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:30:05,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:30:05,142 INFO L87 Difference]: Start difference. First operand 23424 states and 33717 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:06,172 INFO L93 Difference]: Finished difference Result 30743 states and 44172 transitions. [2023-12-02 17:30:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 17:30:06,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:30:06,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:06,204 INFO L225 Difference]: With dead ends: 30743 [2023-12-02 17:30:06,204 INFO L226 Difference]: Without dead ends: 28693 [2023-12-02 17:30:06,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:30:06,214 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 839 mSDsluCounter, 2017 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 2374 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:06,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 2374 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:30:06,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28693 states. [2023-12-02 17:30:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28693 to 23437. [2023-12-02 17:30:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23437 states, 23436 states have (on average 1.4393667861409798) internal successors, (33733), 23436 states have internal predecessors, (33733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23437 states to 23437 states and 33733 transitions. [2023-12-02 17:30:06,575 INFO L78 Accepts]: Start accepts. Automaton has 23437 states and 33733 transitions. Word has length 72 [2023-12-02 17:30:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:06,575 INFO L495 AbstractCegarLoop]: Abstraction has 23437 states and 33733 transitions. [2023-12-02 17:30:06,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 23437 states and 33733 transitions. [2023-12-02 17:30:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:30:06,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:06,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:06,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 17:30:06,577 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:06,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:06,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1452585604, now seen corresponding path program 1 times [2023-12-02 17:30:06,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:06,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349579790] [2023-12-02 17:30:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:06,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:07,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:07,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349579790] [2023-12-02 17:30:07,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349579790] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:07,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:07,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-12-02 17:30:07,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193585276] [2023-12-02 17:30:07,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:07,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 17:30:07,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:07,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 17:30:07,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:30:07,800 INFO L87 Difference]: Start difference. First operand 23437 states and 33733 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:10,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:10,087 INFO L93 Difference]: Finished difference Result 35896 states and 51643 transitions. [2023-12-02 17:30:10,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:30:10,088 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:30:10,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:10,121 INFO L225 Difference]: With dead ends: 35896 [2023-12-02 17:30:10,121 INFO L226 Difference]: Without dead ends: 35894 [2023-12-02 17:30:10,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=378, Invalid=1262, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:30:10,129 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 1555 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1555 SdHoareTripleChecker+Valid, 2222 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:10,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1555 Valid, 2222 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2579 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 17:30:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35894 states. [2023-12-02 17:30:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35894 to 23445. [2023-12-02 17:30:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23445 states, 23444 states have (on average 1.439344821702781) internal successors, (33744), 23444 states have internal predecessors, (33744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23445 states to 23445 states and 33744 transitions. [2023-12-02 17:30:10,389 INFO L78 Accepts]: Start accepts. Automaton has 23445 states and 33744 transitions. Word has length 72 [2023-12-02 17:30:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:10,389 INFO L495 AbstractCegarLoop]: Abstraction has 23445 states and 33744 transitions. [2023-12-02 17:30:10,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 23445 states and 33744 transitions. [2023-12-02 17:30:10,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:30:10,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:10,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:10,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 17:30:10,391 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:10,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:10,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1903571292, now seen corresponding path program 1 times [2023-12-02 17:30:10,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:10,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774730993] [2023-12-02 17:30:10,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:10,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:11,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:11,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774730993] [2023-12-02 17:30:11,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774730993] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:11,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:11,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:30:11,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487411666] [2023-12-02 17:30:11,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:11,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:30:11,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:30:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:30:11,439 INFO L87 Difference]: Start difference. First operand 23445 states and 33744 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:12,717 INFO L93 Difference]: Finished difference Result 28768 states and 41285 transitions. [2023-12-02 17:30:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 17:30:12,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2023-12-02 17:30:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:12,740 INFO L225 Difference]: With dead ends: 28768 [2023-12-02 17:30:12,740 INFO L226 Difference]: Without dead ends: 28766 [2023-12-02 17:30:12,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 17:30:12,746 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 917 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:12,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 2064 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:30:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28766 states. [2023-12-02 17:30:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28766 to 24481. [2023-12-02 17:30:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24481 states, 24480 states have (on average 1.4378676470588236) internal successors, (35199), 24480 states have internal predecessors, (35199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24481 states to 24481 states and 35199 transitions. [2023-12-02 17:30:12,977 INFO L78 Accepts]: Start accepts. Automaton has 24481 states and 35199 transitions. Word has length 72 [2023-12-02 17:30:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:12,978 INFO L495 AbstractCegarLoop]: Abstraction has 24481 states and 35199 transitions. [2023-12-02 17:30:12,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 24481 states and 35199 transitions. [2023-12-02 17:30:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:30:12,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:12,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:12,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 17:30:12,979 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:12,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:12,980 INFO L85 PathProgramCache]: Analyzing trace with hash 894084829, now seen corresponding path program 1 times [2023-12-02 17:30:12,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:12,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360948581] [2023-12-02 17:30:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:12,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:13,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:13,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360948581] [2023-12-02 17:30:13,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360948581] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:13,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:13,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:30:13,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803137226] [2023-12-02 17:30:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:13,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:30:13,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:13,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:30:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:30:13,025 INFO L87 Difference]: Start difference. First operand 24481 states and 35199 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:13,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:13,130 INFO L93 Difference]: Finished difference Result 44417 states and 64011 transitions. [2023-12-02 17:30:13,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:30:13,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2023-12-02 17:30:13,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:13,148 INFO L225 Difference]: With dead ends: 44417 [2023-12-02 17:30:13,148 INFO L226 Difference]: Without dead ends: 23762 [2023-12-02 17:30:13,163 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 [2023-12-02 17:30:13,163 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 142 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:13,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 379 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:30:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23762 states. [2023-12-02 17:30:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23762 to 23760. [2023-12-02 17:30:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23760 states, 23759 states have (on average 1.4362136453554442) internal successors, (34123), 23759 states have internal predecessors, (34123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23760 states to 23760 states and 34123 transitions. [2023-12-02 17:30:13,342 INFO L78 Accepts]: Start accepts. Automaton has 23760 states and 34123 transitions. Word has length 73 [2023-12-02 17:30:13,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:13,343 INFO L495 AbstractCegarLoop]: Abstraction has 23760 states and 34123 transitions. [2023-12-02 17:30:13,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 23760 states and 34123 transitions. [2023-12-02 17:30:13,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:30:13,344 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:13,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:13,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 17:30:13,344 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:13,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:13,345 INFO L85 PathProgramCache]: Analyzing trace with hash 557425690, now seen corresponding path program 1 times [2023-12-02 17:30:13,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:13,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013017187] [2023-12-02 17:30:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:13,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:13,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:13,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013017187] [2023-12-02 17:30:13,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013017187] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:13,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:13,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:30:13,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109433827] [2023-12-02 17:30:13,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:13,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:30:13,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:13,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:30:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:30:13,377 INFO L87 Difference]: Start difference. First operand 23760 states and 34123 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:13,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:13,489 INFO L93 Difference]: Finished difference Result 45655 states and 65779 transitions. [2023-12-02 17:30:13,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:30:13,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2023-12-02 17:30:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:13,508 INFO L225 Difference]: With dead ends: 45655 [2023-12-02 17:30:13,508 INFO L226 Difference]: Without dead ends: 23175 [2023-12-02 17:30:13,523 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 [2023-12-02 17:30:13,523 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 136 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:13,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 369 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:30:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23175 states. [2023-12-02 17:30:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23175 to 23059. [2023-12-02 17:30:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23059 states, 23058 states have (on average 1.4344695984040245) internal successors, (33076), 23058 states have internal predecessors, (33076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23059 states to 23059 states and 33076 transitions. [2023-12-02 17:30:13,725 INFO L78 Accepts]: Start accepts. Automaton has 23059 states and 33076 transitions. Word has length 73 [2023-12-02 17:30:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:13,725 INFO L495 AbstractCegarLoop]: Abstraction has 23059 states and 33076 transitions. [2023-12-02 17:30:13,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:13,725 INFO L276 IsEmpty]: Start isEmpty. Operand 23059 states and 33076 transitions. [2023-12-02 17:30:13,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:30:13,726 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:13,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:13,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 17:30:13,727 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:13,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:13,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1239141458, now seen corresponding path program 1 times [2023-12-02 17:30:13,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:13,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893849960] [2023-12-02 17:30:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:13,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:13,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:13,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893849960] [2023-12-02 17:30:13,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893849960] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:13,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:13,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:30:13,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144370869] [2023-12-02 17:30:13,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:13,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:30:13,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:13,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:30:13,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:30:13,762 INFO L87 Difference]: Start difference. First operand 23059 states and 33076 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:13,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:13,876 INFO L93 Difference]: Finished difference Result 40162 states and 57733 transitions. [2023-12-02 17:30:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:30:13,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2023-12-02 17:30:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:13,896 INFO L225 Difference]: With dead ends: 40162 [2023-12-02 17:30:13,897 INFO L226 Difference]: Without dead ends: 22263 [2023-12-02 17:30:13,906 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 [2023-12-02 17:30:13,906 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 145 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:13,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 359 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:30:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22263 states. [2023-12-02 17:30:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22263 to 22261. [2023-12-02 17:30:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22261 states, 22260 states have (on average 1.4324348607367476) internal successors, (31886), 22260 states have internal predecessors, (31886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22261 states to 22261 states and 31886 transitions. [2023-12-02 17:30:14,096 INFO L78 Accepts]: Start accepts. Automaton has 22261 states and 31886 transitions. Word has length 73 [2023-12-02 17:30:14,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:14,096 INFO L495 AbstractCegarLoop]: Abstraction has 22261 states and 31886 transitions. [2023-12-02 17:30:14,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:14,097 INFO L276 IsEmpty]: Start isEmpty. Operand 22261 states and 31886 transitions. [2023-12-02 17:30:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:30:14,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:14,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:14,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-02 17:30:14,098 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:14,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:14,098 INFO L85 PathProgramCache]: Analyzing trace with hash 209943568, now seen corresponding path program 1 times [2023-12-02 17:30:14,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:14,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412848742] [2023-12-02 17:30:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:14,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:16,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412848742] [2023-12-02 17:30:16,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412848742] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:16,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:16,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-12-02 17:30:16,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824193686] [2023-12-02 17:30:16,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:16,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 17:30:16,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:16,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 17:30:16,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2023-12-02 17:30:16,627 INFO L87 Difference]: Start difference. First operand 22261 states and 31886 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:20,792 INFO L93 Difference]: Finished difference Result 29385 states and 42106 transitions. [2023-12-02 17:30:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 17:30:20,793 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:30:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:20,821 INFO L225 Difference]: With dead ends: 29385 [2023-12-02 17:30:20,822 INFO L226 Difference]: Without dead ends: 29383 [2023-12-02 17:30:20,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:30:20,829 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 900 mSDsluCounter, 3460 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 3834 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:20,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 3834 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2023 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 17:30:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29383 states. [2023-12-02 17:30:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29383 to 22261. [2023-12-02 17:30:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22261 states, 22260 states have (on average 1.4324348607367476) internal successors, (31886), 22260 states have internal predecessors, (31886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22261 states to 22261 states and 31886 transitions. [2023-12-02 17:30:21,041 INFO L78 Accepts]: Start accepts. Automaton has 22261 states and 31886 transitions. Word has length 74 [2023-12-02 17:30:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:21,041 INFO L495 AbstractCegarLoop]: Abstraction has 22261 states and 31886 transitions. [2023-12-02 17:30:21,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand 22261 states and 31886 transitions. [2023-12-02 17:30:21,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:30:21,042 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:21,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:21,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-02 17:30:21,042 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:21,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:21,043 INFO L85 PathProgramCache]: Analyzing trace with hash -675948560, now seen corresponding path program 1 times [2023-12-02 17:30:21,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:21,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150331876] [2023-12-02 17:30:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:21,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:22,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:22,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150331876] [2023-12-02 17:30:22,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150331876] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:22,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:22,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:30:22,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705026869] [2023-12-02 17:30:22,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:22,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:30:22,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:22,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:30:22,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:30:22,062 INFO L87 Difference]: Start difference. First operand 22261 states and 31886 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:23,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:23,309 INFO L93 Difference]: Finished difference Result 43494 states and 62264 transitions. [2023-12-02 17:30:23,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 17:30:23,310 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:30:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:23,346 INFO L225 Difference]: With dead ends: 43494 [2023-12-02 17:30:23,346 INFO L226 Difference]: Without dead ends: 39652 [2023-12-02 17:30:23,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:30:23,355 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 738 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:23,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 2050 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:30:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39652 states. [2023-12-02 17:30:23,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39652 to 22268. [2023-12-02 17:30:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22268 states, 22267 states have (on average 1.4323887366955586) internal successors, (31895), 22267 states have internal predecessors, (31895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22268 states to 22268 states and 31895 transitions. [2023-12-02 17:30:23,619 INFO L78 Accepts]: Start accepts. Automaton has 22268 states and 31895 transitions. Word has length 74 [2023-12-02 17:30:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:23,619 INFO L495 AbstractCegarLoop]: Abstraction has 22268 states and 31895 transitions. [2023-12-02 17:30:23,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 22268 states and 31895 transitions. [2023-12-02 17:30:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:30:23,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:23,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:23,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-02 17:30:23,620 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:23,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:23,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1614316592, now seen corresponding path program 1 times [2023-12-02 17:30:23,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:23,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799286202] [2023-12-02 17:30:23,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:23,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:27,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:27,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799286202] [2023-12-02 17:30:27,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799286202] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:27,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:27,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2023-12-02 17:30:27,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249492611] [2023-12-02 17:30:27,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:27,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 17:30:27,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:27,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 17:30:27,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:30:27,063 INFO L87 Difference]: Start difference. First operand 22268 states and 31895 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:33,111 INFO L93 Difference]: Finished difference Result 31942 states and 45614 transitions. [2023-12-02 17:30:33,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 17:30:33,111 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:30:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:33,139 INFO L225 Difference]: With dead ends: 31942 [2023-12-02 17:30:33,139 INFO L226 Difference]: Without dead ends: 31940 [2023-12-02 17:30:33,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=811, Invalid=2611, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:30:33,146 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 1898 mSDsluCounter, 3081 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:33,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1898 Valid, 3444 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 17:30:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31940 states. [2023-12-02 17:30:33,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31940 to 22268. [2023-12-02 17:30:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22268 states, 22267 states have (on average 1.4323887366955586) internal successors, (31895), 22267 states have internal predecessors, (31895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:33,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22268 states to 22268 states and 31895 transitions. [2023-12-02 17:30:33,367 INFO L78 Accepts]: Start accepts. Automaton has 22268 states and 31895 transitions. Word has length 74 [2023-12-02 17:30:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:33,368 INFO L495 AbstractCegarLoop]: Abstraction has 22268 states and 31895 transitions. [2023-12-02 17:30:33,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 22268 states and 31895 transitions. [2023-12-02 17:30:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:30:33,368 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:33,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:33,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-02 17:30:33,369 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:33,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash -949783600, now seen corresponding path program 1 times [2023-12-02 17:30:33,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:33,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245670131] [2023-12-02 17:30:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:33,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:34,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:34,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245670131] [2023-12-02 17:30:34,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245670131] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:34,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:34,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-12-02 17:30:34,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607361876] [2023-12-02 17:30:34,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:34,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 17:30:34,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:34,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 17:30:34,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-12-02 17:30:34,673 INFO L87 Difference]: Start difference. First operand 22268 states and 31895 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:36,966 INFO L93 Difference]: Finished difference Result 29181 states and 41716 transitions. [2023-12-02 17:30:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 17:30:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:30:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:36,989 INFO L225 Difference]: With dead ends: 29181 [2023-12-02 17:30:36,989 INFO L226 Difference]: Without dead ends: 27259 [2023-12-02 17:30:36,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=447, Invalid=1533, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 17:30:36,996 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 1150 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 2283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:36,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1150 Valid, 1910 Invalid, 2283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 17:30:37,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27259 states. [2023-12-02 17:30:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27259 to 22274. [2023-12-02 17:30:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22274 states, 22273 states have (on average 1.4323171553001393) internal successors, (31902), 22273 states have internal predecessors, (31902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22274 states to 22274 states and 31902 transitions. [2023-12-02 17:30:37,202 INFO L78 Accepts]: Start accepts. Automaton has 22274 states and 31902 transitions. Word has length 74 [2023-12-02 17:30:37,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:37,202 INFO L495 AbstractCegarLoop]: Abstraction has 22274 states and 31902 transitions. [2023-12-02 17:30:37,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:37,202 INFO L276 IsEmpty]: Start isEmpty. Operand 22274 states and 31902 transitions. [2023-12-02 17:30:37,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:30:37,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:37,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:37,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-02 17:30:37,204 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:37,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1888151632, now seen corresponding path program 1 times [2023-12-02 17:30:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:37,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633239768] [2023-12-02 17:30:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:37,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:38,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:38,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633239768] [2023-12-02 17:30:38,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633239768] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:38,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:38,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:30:38,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076100690] [2023-12-02 17:30:38,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:38,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:30:38,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:38,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:30:38,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:30:38,241 INFO L87 Difference]: Start difference. First operand 22274 states and 31902 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:39,540 INFO L93 Difference]: Finished difference Result 41690 states and 59581 transitions. [2023-12-02 17:30:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:30:39,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:30:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:39,575 INFO L225 Difference]: With dead ends: 41690 [2023-12-02 17:30:39,575 INFO L226 Difference]: Without dead ends: 41688 [2023-12-02 17:30:39,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:30:39,584 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 922 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:39,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 1767 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:30:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41688 states. [2023-12-02 17:30:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41688 to 22268. [2023-12-02 17:30:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22268 states, 22267 states have (on average 1.4323887366955586) internal successors, (31895), 22267 states have internal predecessors, (31895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22268 states to 22268 states and 31895 transitions. [2023-12-02 17:30:39,850 INFO L78 Accepts]: Start accepts. Automaton has 22268 states and 31895 transitions. Word has length 74 [2023-12-02 17:30:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:39,850 INFO L495 AbstractCegarLoop]: Abstraction has 22268 states and 31895 transitions. [2023-12-02 17:30:39,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:39,850 INFO L276 IsEmpty]: Start isEmpty. Operand 22268 states and 31895 transitions. [2023-12-02 17:30:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:30:39,851 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:39,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:39,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 17:30:39,852 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:39,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:39,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1468005264, now seen corresponding path program 1 times [2023-12-02 17:30:39,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:39,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188898876] [2023-12-02 17:30:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:39,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:42,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:42,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188898876] [2023-12-02 17:30:42,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188898876] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:42,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:42,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-12-02 17:30:42,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149139090] [2023-12-02 17:30:42,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:42,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:30:42,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:42,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:30:42,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:30:42,524 INFO L87 Difference]: Start difference. First operand 22268 states and 31895 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:46,236 INFO L93 Difference]: Finished difference Result 27278 states and 38965 transitions. [2023-12-02 17:30:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 17:30:46,236 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:30:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:46,256 INFO L225 Difference]: With dead ends: 27278 [2023-12-02 17:30:46,256 INFO L226 Difference]: Without dead ends: 27276 [2023-12-02 17:30:46,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 17:30:46,260 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1334 mSDsluCounter, 4148 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 4555 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:46,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1334 Valid, 4555 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 17:30:46,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27276 states. [2023-12-02 17:30:46,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27276 to 22268. [2023-12-02 17:30:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22268 states, 22267 states have (on average 1.4323887366955586) internal successors, (31895), 22267 states have internal predecessors, (31895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22268 states to 22268 states and 31895 transitions. [2023-12-02 17:30:46,447 INFO L78 Accepts]: Start accepts. Automaton has 22268 states and 31895 transitions. Word has length 74 [2023-12-02 17:30:46,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:46,447 INFO L495 AbstractCegarLoop]: Abstraction has 22268 states and 31895 transitions. [2023-12-02 17:30:46,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:46,447 INFO L276 IsEmpty]: Start isEmpty. Operand 22268 states and 31895 transitions. [2023-12-02 17:30:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:30:46,448 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:46,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:46,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-02 17:30:46,448 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:46,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1010937936, now seen corresponding path program 1 times [2023-12-02 17:30:46,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:46,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943738968] [2023-12-02 17:30:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:46,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:48,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:48,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943738968] [2023-12-02 17:30:48,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943738968] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:48,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:48,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-12-02 17:30:48,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250743365] [2023-12-02 17:30:48,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:48,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:30:48,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:48,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:30:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:30:48,947 INFO L87 Difference]: Start difference. First operand 22268 states and 31895 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:53,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:53,814 INFO L93 Difference]: Finished difference Result 27445 states and 39250 transitions. [2023-12-02 17:30:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 17:30:53,815 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:30:53,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:53,838 INFO L225 Difference]: With dead ends: 27445 [2023-12-02 17:30:53,838 INFO L226 Difference]: Without dead ends: 25523 [2023-12-02 17:30:53,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=640, Invalid=2012, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 17:30:53,844 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 1388 mSDsluCounter, 3449 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 3796 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:53,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1388 Valid, 3796 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 17:30:53,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25523 states. [2023-12-02 17:30:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25523 to 22274. [2023-12-02 17:30:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22274 states, 22273 states have (on average 1.4323171553001393) internal successors, (31902), 22273 states have internal predecessors, (31902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22274 states to 22274 states and 31902 transitions. [2023-12-02 17:30:54,064 INFO L78 Accepts]: Start accepts. Automaton has 22274 states and 31902 transitions. Word has length 74 [2023-12-02 17:30:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:54,065 INFO L495 AbstractCegarLoop]: Abstraction has 22274 states and 31902 transitions. [2023-12-02 17:30:54,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 22274 states and 31902 transitions. [2023-12-02 17:30:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:30:54,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:54,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:54,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-12-02 17:30:54,066 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:54,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:54,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1949305968, now seen corresponding path program 1 times [2023-12-02 17:30:54,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:54,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132913738] [2023-12-02 17:30:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:54,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:30:55,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:55,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132913738] [2023-12-02 17:30:55,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132913738] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:55,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:55,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-12-02 17:30:55,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791897857] [2023-12-02 17:30:55,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:55,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 17:30:55,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 17:30:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:30:55,710 INFO L87 Difference]: Start difference. First operand 22274 states and 31902 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:58,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:58,254 INFO L93 Difference]: Finished difference Result 31336 states and 44799 transitions. [2023-12-02 17:30:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 17:30:58,254 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:30:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:58,281 INFO L225 Difference]: With dead ends: 31336 [2023-12-02 17:30:58,281 INFO L226 Difference]: Without dead ends: 31334 [2023-12-02 17:30:58,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=550, Invalid=1706, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:30:58,288 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 1465 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:58,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1465 Valid, 1583 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1999 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 17:30:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31334 states. [2023-12-02 17:30:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31334 to 22274. [2023-12-02 17:30:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22274 states, 22273 states have (on average 1.4323171553001393) internal successors, (31902), 22273 states have internal predecessors, (31902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22274 states to 22274 states and 31902 transitions. [2023-12-02 17:30:58,510 INFO L78 Accepts]: Start accepts. Automaton has 22274 states and 31902 transitions. Word has length 74 [2023-12-02 17:30:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:58,510 INFO L495 AbstractCegarLoop]: Abstraction has 22274 states and 31902 transitions. [2023-12-02 17:30:58,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:30:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 22274 states and 31902 transitions. [2023-12-02 17:30:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:30:58,511 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:58,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:58,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-12-02 17:30:58,511 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:58,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:58,512 INFO L85 PathProgramCache]: Analyzing trace with hash 244382544, now seen corresponding path program 1 times [2023-12-02 17:30:58,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:58,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537408750] [2023-12-02 17:30:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:58,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:01,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:01,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537408750] [2023-12-02 17:31:01,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537408750] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:01,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:01,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-12-02 17:31:01,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134551538] [2023-12-02 17:31:01,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:01,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 17:31:01,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:01,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 17:31:01,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2023-12-02 17:31:01,063 INFO L87 Difference]: Start difference. First operand 22274 states and 31902 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:04,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:04,782 INFO L93 Difference]: Finished difference Result 25416 states and 36322 transitions. [2023-12-02 17:31:04,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 17:31:04,783 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2023-12-02 17:31:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:04,805 INFO L225 Difference]: With dead ends: 25416 [2023-12-02 17:31:04,806 INFO L226 Difference]: Without dead ends: 25414 [2023-12-02 17:31:04,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=483, Invalid=1869, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 17:31:04,813 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 1012 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 2952 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:04,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 1995 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2952 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 17:31:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25414 states. [2023-12-02 17:31:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25414 to 22286. [2023-12-02 17:31:04,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22286 states, 22285 states have (on average 1.4321741081444919) internal successors, (31916), 22285 states have internal predecessors, (31916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22286 states to 22286 states and 31916 transitions. [2023-12-02 17:31:05,019 INFO L78 Accepts]: Start accepts. Automaton has 22286 states and 31916 transitions. Word has length 74 [2023-12-02 17:31:05,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:05,019 INFO L495 AbstractCegarLoop]: Abstraction has 22286 states and 31916 transitions. [2023-12-02 17:31:05,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:05,019 INFO L276 IsEmpty]: Start isEmpty. Operand 22286 states and 31916 transitions. [2023-12-02 17:31:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 17:31:05,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:05,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:05,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-12-02 17:31:05,021 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:31:05,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:05,021 INFO L85 PathProgramCache]: Analyzing trace with hash 375211668, now seen corresponding path program 1 times [2023-12-02 17:31:05,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:05,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813276988] [2023-12-02 17:31:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:05,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:05,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:05,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813276988] [2023-12-02 17:31:05,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813276988] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:05,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:05,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:31:05,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973170961] [2023-12-02 17:31:05,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:05,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:31:05,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:05,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:31:05,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:31:05,061 INFO L87 Difference]: Start difference. First operand 22286 states and 31916 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:05,159 INFO L93 Difference]: Finished difference Result 38036 states and 54619 transitions. [2023-12-02 17:31:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:31:05,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2023-12-02 17:31:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:05,217 INFO L225 Difference]: With dead ends: 38036 [2023-12-02 17:31:05,218 INFO L226 Difference]: Without dead ends: 18730 [2023-12-02 17:31:05,222 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 [2023-12-02 17:31:05,223 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 133 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:05,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 363 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18730 states. [2023-12-02 17:31:05,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18730 to 18727. [2023-12-02 17:31:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18727 states, 18726 states have (on average 1.4289223539463847) internal successors, (26758), 18726 states have internal predecessors, (26758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18727 states to 18727 states and 26758 transitions. [2023-12-02 17:31:05,373 INFO L78 Accepts]: Start accepts. Automaton has 18727 states and 26758 transitions. Word has length 75 [2023-12-02 17:31:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:05,373 INFO L495 AbstractCegarLoop]: Abstraction has 18727 states and 26758 transitions. [2023-12-02 17:31:05,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:05,373 INFO L276 IsEmpty]: Start isEmpty. Operand 18727 states and 26758 transitions. [2023-12-02 17:31:05,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 17:31:05,374 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:05,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:05,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-12-02 17:31:05,374 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:31:05,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:05,375 INFO L85 PathProgramCache]: Analyzing trace with hash -883758761, now seen corresponding path program 1 times [2023-12-02 17:31:05,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:05,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101182184] [2023-12-02 17:31:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:05,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:05,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:05,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101182184] [2023-12-02 17:31:05,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101182184] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:05,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:05,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:31:05,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601269690] [2023-12-02 17:31:05,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:05,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:31:05,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:05,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:31:05,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:31:05,406 INFO L87 Difference]: Start difference. First operand 18727 states and 26758 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:05,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:05,509 INFO L93 Difference]: Finished difference Result 36683 states and 52568 transitions. [2023-12-02 17:31:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:31:05,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2023-12-02 17:31:05,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:05,524 INFO L225 Difference]: With dead ends: 36683 [2023-12-02 17:31:05,524 INFO L226 Difference]: Without dead ends: 18083 [2023-12-02 17:31:05,532 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 [2023-12-02 17:31:05,533 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 132 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:05,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 355 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18083 states. [2023-12-02 17:31:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18083 to 18081. [2023-12-02 17:31:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18081 states, 18080 states have (on average 1.4270464601769912) internal successors, (25801), 18080 states have internal predecessors, (25801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:05,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18081 states to 18081 states and 25801 transitions. [2023-12-02 17:31:05,684 INFO L78 Accepts]: Start accepts. Automaton has 18081 states and 25801 transitions. Word has length 75 [2023-12-02 17:31:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:05,685 INFO L495 AbstractCegarLoop]: Abstraction has 18081 states and 25801 transitions. [2023-12-02 17:31:05,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 18081 states and 25801 transitions. [2023-12-02 17:31:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:31:05,686 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:05,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:05,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-12-02 17:31:05,686 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:31:05,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:05,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1316904164, now seen corresponding path program 1 times [2023-12-02 17:31:05,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:05,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230762494] [2023-12-02 17:31:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:05,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:14,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:14,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230762494] [2023-12-02 17:31:14,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230762494] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:14,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:14,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2023-12-02 17:31:14,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191971353] [2023-12-02 17:31:14,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:14,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 17:31:14,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 17:31:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 17:31:14,295 INFO L87 Difference]: Start difference. First operand 18081 states and 25801 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:43,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:43,512 INFO L93 Difference]: Finished difference Result 24512 states and 34902 transitions. [2023-12-02 17:31:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-02 17:31:43,512 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-12-02 17:31:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:43,531 INFO L225 Difference]: With dead ends: 24512 [2023-12-02 17:31:43,531 INFO L226 Difference]: Without dead ends: 22718 [2023-12-02 17:31:43,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=1801, Invalid=5005, Unknown=0, NotChecked=0, Total=6806 [2023-12-02 17:31:43,538 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1441 mSDsluCounter, 2749 mSDsCounter, 0 mSdLazyCounter, 4442 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 3124 SdHoareTripleChecker+Invalid, 4463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 4442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:43,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1441 Valid, 3124 Invalid, 4463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 4442 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-02 17:31:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22718 states. [2023-12-02 17:31:43,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22718 to 18065. [2023-12-02 17:31:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18065 states, 18064 states have (on average 1.4273693534100975) internal successors, (25784), 18064 states have internal predecessors, (25784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18065 states to 18065 states and 25784 transitions. [2023-12-02 17:31:43,705 INFO L78 Accepts]: Start accepts. Automaton has 18065 states and 25784 transitions. Word has length 76 [2023-12-02 17:31:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:43,705 INFO L495 AbstractCegarLoop]: Abstraction has 18065 states and 25784 transitions. [2023-12-02 17:31:43,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 18065 states and 25784 transitions. [2023-12-02 17:31:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:31:43,706 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:43,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:43,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-12-02 17:31:43,707 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:31:43,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash 378536132, now seen corresponding path program 1 times [2023-12-02 17:31:43,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:43,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581845275] [2023-12-02 17:31:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:43,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:47,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:47,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581845275] [2023-12-02 17:31:47,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581845275] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:47,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:47,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2023-12-02 17:31:47,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685605022] [2023-12-02 17:31:47,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:47,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 17:31:47,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:47,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 17:31:47,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:31:47,929 INFO L87 Difference]: Start difference. First operand 18065 states and 25784 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:56,468 INFO L93 Difference]: Finished difference Result 26518 states and 37773 transitions. [2023-12-02 17:31:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-02 17:31:56,469 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-12-02 17:31:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:56,490 INFO L225 Difference]: With dead ends: 26518 [2023-12-02 17:31:56,490 INFO L226 Difference]: Without dead ends: 26516 [2023-12-02 17:31:56,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=971, Invalid=3061, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 17:31:56,497 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1313 mSDsluCounter, 3661 mSDsCounter, 0 mSdLazyCounter, 2547 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 4019 SdHoareTripleChecker+Invalid, 2561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:56,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1313 Valid, 4019 Invalid, 2561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2547 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 17:31:56,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26516 states. [2023-12-02 17:31:56,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26516 to 18055. [2023-12-02 17:31:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18055 states, 18054 states have (on average 1.4274952919020716) internal successors, (25772), 18054 states have internal predecessors, (25772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18055 states to 18055 states and 25772 transitions. [2023-12-02 17:31:56,675 INFO L78 Accepts]: Start accepts. Automaton has 18055 states and 25772 transitions. Word has length 76 [2023-12-02 17:31:56,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:56,675 INFO L495 AbstractCegarLoop]: Abstraction has 18055 states and 25772 transitions. [2023-12-02 17:31:56,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:56,676 INFO L276 IsEmpty]: Start isEmpty. Operand 18055 states and 25772 transitions. [2023-12-02 17:31:56,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:31:56,676 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:56,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:56,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-12-02 17:31:56,676 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:31:56,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:56,677 INFO L85 PathProgramCache]: Analyzing trace with hash -560274268, now seen corresponding path program 1 times [2023-12-02 17:31:56,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:56,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243771749] [2023-12-02 17:31:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:56,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:32:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:32:00,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:32:00,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243771749] [2023-12-02 17:32:00,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243771749] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:32:00,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:32:00,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2023-12-02 17:32:00,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503933267] [2023-12-02 17:32:00,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:32:00,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 17:32:00,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:32:00,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 17:32:00,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:32:00,575 INFO L87 Difference]: Start difference. First operand 18055 states and 25772 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:32:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:32:08,281 INFO L93 Difference]: Finished difference Result 22715 states and 32324 transitions. [2023-12-02 17:32:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-02 17:32:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-12-02 17:32:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:32:08,301 INFO L225 Difference]: With dead ends: 22715 [2023-12-02 17:32:08,301 INFO L226 Difference]: Without dead ends: 22713 [2023-12-02 17:32:08,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=812, Invalid=2610, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:32:08,306 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 1234 mSDsluCounter, 3357 mSDsCounter, 0 mSdLazyCounter, 4411 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 3772 SdHoareTripleChecker+Invalid, 4420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 4411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:32:08,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1234 Valid, 3772 Invalid, 4420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 4411 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-12-02 17:32:08,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22713 states. [2023-12-02 17:32:08,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22713 to 18041. [2023-12-02 17:32:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18041 states, 18040 states have (on average 1.4276607538802661) internal successors, (25755), 18040 states have internal predecessors, (25755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:32:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18041 states to 18041 states and 25755 transitions. [2023-12-02 17:32:08,475 INFO L78 Accepts]: Start accepts. Automaton has 18041 states and 25755 transitions. Word has length 76 [2023-12-02 17:32:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:32:08,475 INFO L495 AbstractCegarLoop]: Abstraction has 18041 states and 25755 transitions. [2023-12-02 17:32:08,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:32:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 18041 states and 25755 transitions. [2023-12-02 17:32:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:32:08,476 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:32:08,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:32:08,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-12-02 17:32:08,476 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:32:08,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:32:08,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1722742652, now seen corresponding path program 1 times [2023-12-02 17:32:08,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:32:08,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452184771] [2023-12-02 17:32:08,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:32:08,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:32:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:32:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:32:13,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:32:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452184771] [2023-12-02 17:32:13,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452184771] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:32:13,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:32:13,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2023-12-02 17:32:13,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445519697] [2023-12-02 17:32:13,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:32:13,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 17:32:13,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:32:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 17:32:13,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:32:13,582 INFO L87 Difference]: Start difference. First operand 18041 states and 25755 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:32:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:32:20,184 INFO L93 Difference]: Finished difference Result 22771 states and 32381 transitions. [2023-12-02 17:32:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:32:20,185 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-12-02 17:32:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:32:20,201 INFO L225 Difference]: With dead ends: 22771 [2023-12-02 17:32:20,201 INFO L226 Difference]: Without dead ends: 22769 [2023-12-02 17:32:20,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 17:32:20,206 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 995 mSDsluCounter, 2045 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 2370 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:32:20,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 2370 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2595 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-02 17:32:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22769 states. [2023-12-02 17:32:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22769 to 18041. [2023-12-02 17:32:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18041 states, 18040 states have (on average 1.4276607538802661) internal successors, (25755), 18040 states have internal predecessors, (25755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:32:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18041 states to 18041 states and 25755 transitions. [2023-12-02 17:32:20,380 INFO L78 Accepts]: Start accepts. Automaton has 18041 states and 25755 transitions. Word has length 76 [2023-12-02 17:32:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:32:20,381 INFO L495 AbstractCegarLoop]: Abstraction has 18041 states and 25755 transitions. [2023-12-02 17:32:20,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:32:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 18041 states and 25755 transitions. [2023-12-02 17:32:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:32:20,382 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:32:20,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:32:20,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-12-02 17:32:20,382 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:32:20,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:32:20,382 INFO L85 PathProgramCache]: Analyzing trace with hash -362517404, now seen corresponding path program 1 times [2023-12-02 17:32:20,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:32:20,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138617762] [2023-12-02 17:32:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:32:20,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:32:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:32:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:32:24,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:32:24,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138617762] [2023-12-02 17:32:24,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138617762] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:32:24,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:32:24,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2023-12-02 17:32:24,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625911657] [2023-12-02 17:32:24,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:32:24,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 17:32:24,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:32:24,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 17:32:24,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:32:24,729 INFO L87 Difference]: Start difference. First operand 18041 states and 25755 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:32:31,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:32:31,312 INFO L93 Difference]: Finished difference Result 22755 states and 32368 transitions. [2023-12-02 17:32:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 17:32:31,312 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-12-02 17:32:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:32:31,331 INFO L225 Difference]: With dead ends: 22755 [2023-12-02 17:32:31,331 INFO L226 Difference]: Without dead ends: 22753 [2023-12-02 17:32:31,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=561, Invalid=1989, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:32:31,336 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1054 mSDsluCounter, 1890 mSDsCounter, 0 mSdLazyCounter, 2915 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 2203 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:32:31,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1054 Valid, 2203 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2915 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 17:32:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22753 states. [2023-12-02 17:32:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22753 to 18047. [2023-12-02 17:32:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18047 states, 18046 states have (on average 1.4275739776127674) internal successors, (25762), 18046 states have internal predecessors, (25762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:32:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18047 states to 18047 states and 25762 transitions. [2023-12-02 17:32:31,507 INFO L78 Accepts]: Start accepts. Automaton has 18047 states and 25762 transitions. Word has length 76 [2023-12-02 17:32:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:32:31,507 INFO L495 AbstractCegarLoop]: Abstraction has 18047 states and 25762 transitions. [2023-12-02 17:32:31,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:32:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 18047 states and 25762 transitions. [2023-12-02 17:32:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 17:32:31,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:32:31,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:32:31,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-12-02 17:32:31,508 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:32:31,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:32:31,509 INFO L85 PathProgramCache]: Analyzing trace with hash -984220520, now seen corresponding path program 1 times [2023-12-02 17:32:31,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:32:31,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037273375] [2023-12-02 17:32:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:32:31,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:32:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:32:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:32:43,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:32:43,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037273375] [2023-12-02 17:32:43,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037273375] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:32:43,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:32:43,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2023-12-02 17:32:43,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414802754] [2023-12-02 17:32:43,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:32:43,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-02 17:32:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:32:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-02 17:32:43,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 17:32:43,072 INFO L87 Difference]: Start difference. First operand 18047 states and 25762 transitions. Second operand has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:04,530 INFO L93 Difference]: Finished difference Result 20986 states and 29877 transitions. [2023-12-02 17:33:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-02 17:33:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2023-12-02 17:33:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:04,547 INFO L225 Difference]: With dead ends: 20986 [2023-12-02 17:33:04,548 INFO L226 Difference]: Without dead ends: 20984 [2023-12-02 17:33:04,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=1319, Invalid=4687, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 17:33:04,552 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1298 mSDsluCounter, 3627 mSDsCounter, 0 mSdLazyCounter, 6566 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 3960 SdHoareTripleChecker+Invalid, 6571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:04,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1298 Valid, 3960 Invalid, 6571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6566 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-12-02 17:33:04,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20984 states. [2023-12-02 17:33:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20984 to 18017. [2023-12-02 17:33:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18017 states, 18016 states have (on average 1.4281194493783305) internal successors, (25729), 18016 states have internal predecessors, (25729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18017 states to 18017 states and 25729 transitions. [2023-12-02 17:33:04,774 INFO L78 Accepts]: Start accepts. Automaton has 18017 states and 25729 transitions. Word has length 78 [2023-12-02 17:33:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:04,774 INFO L495 AbstractCegarLoop]: Abstraction has 18017 states and 25729 transitions. [2023-12-02 17:33:04,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 18017 states and 25729 transitions. [2023-12-02 17:33:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 17:33:04,776 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:04,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:04,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-12-02 17:33:04,777 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:04,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1985815940, now seen corresponding path program 1 times [2023-12-02 17:33:04,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:04,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777406552] [2023-12-02 17:33:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:04,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:04,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:04,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777406552] [2023-12-02 17:33:04,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777406552] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:04,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:04,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:04,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043377456] [2023-12-02 17:33:04,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:04,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:33:04,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:04,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:33:04,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:33:04,865 INFO L87 Difference]: Start difference. First operand 18017 states and 25729 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:04,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:04,958 INFO L93 Difference]: Finished difference Result 29065 states and 41813 transitions. [2023-12-02 17:33:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:33:04,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2023-12-02 17:33:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:04,978 INFO L225 Difference]: With dead ends: 29065 [2023-12-02 17:33:04,978 INFO L226 Difference]: Without dead ends: 22167 [2023-12-02 17:33:04,984 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 [2023-12-02 17:33:04,985 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 98 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:04,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 416 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:04,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22167 states. [2023-12-02 17:33:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22167 to 21181. [2023-12-02 17:33:05,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21181 states, 21180 states have (on average 1.4271954674220964) internal successors, (30228), 21180 states have internal predecessors, (30228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21181 states to 21181 states and 30228 transitions. [2023-12-02 17:33:05,186 INFO L78 Accepts]: Start accepts. Automaton has 21181 states and 30228 transitions. Word has length 83 [2023-12-02 17:33:05,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:05,186 INFO L495 AbstractCegarLoop]: Abstraction has 21181 states and 30228 transitions. [2023-12-02 17:33:05,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 21181 states and 30228 transitions. [2023-12-02 17:33:05,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 17:33:05,188 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:05,189 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:05,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-12-02 17:33:05,189 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:05,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:05,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1107341055, now seen corresponding path program 1 times [2023-12-02 17:33:05,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:05,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768549350] [2023-12-02 17:33:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:05,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:05,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:05,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768549350] [2023-12-02 17:33:05,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768549350] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:05,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:05,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:05,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726414881] [2023-12-02 17:33:05,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:05,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:33:05,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:05,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:33:05,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:33:05,235 INFO L87 Difference]: Start difference. First operand 21181 states and 30228 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:05,375 INFO L93 Difference]: Finished difference Result 55134 states and 78678 transitions. [2023-12-02 17:33:05,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:33:05,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2023-12-02 17:33:05,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:05,413 INFO L225 Difference]: With dead ends: 55134 [2023-12-02 17:33:05,413 INFO L226 Difference]: Without dead ends: 35980 [2023-12-02 17:33:05,426 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 [2023-12-02 17:33:05,427 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 106 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:05,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 444 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35980 states. [2023-12-02 17:33:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35980 to 35978. [2023-12-02 17:33:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35978 states, 35977 states have (on average 1.4165716985852073) internal successors, (50964), 35977 states have internal predecessors, (50964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35978 states to 35978 states and 50964 transitions. [2023-12-02 17:33:05,774 INFO L78 Accepts]: Start accepts. Automaton has 35978 states and 50964 transitions. Word has length 86 [2023-12-02 17:33:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:05,774 INFO L495 AbstractCegarLoop]: Abstraction has 35978 states and 50964 transitions. [2023-12-02 17:33:05,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 35978 states and 50964 transitions. [2023-12-02 17:33:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 17:33:05,777 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:05,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:05,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-12-02 17:33:05,777 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:05,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:05,778 INFO L85 PathProgramCache]: Analyzing trace with hash -863019807, now seen corresponding path program 1 times [2023-12-02 17:33:05,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:05,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924551708] [2023-12-02 17:33:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:05,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:05,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:05,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924551708] [2023-12-02 17:33:05,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924551708] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:05,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:05,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:05,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36321705] [2023-12-02 17:33:05,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:05,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:33:05,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:05,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:33:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:33:05,861 INFO L87 Difference]: Start difference. First operand 35978 states and 50964 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:06,040 INFO L93 Difference]: Finished difference Result 62668 states and 89445 transitions. [2023-12-02 17:33:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:33:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2023-12-02 17:33:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:06,159 INFO L225 Difference]: With dead ends: 62668 [2023-12-02 17:33:06,159 INFO L226 Difference]: Without dead ends: 45962 [2023-12-02 17:33:06,165 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 [2023-12-02 17:33:06,166 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 93 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:06,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 397 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45962 states. [2023-12-02 17:33:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45962 to 43470. [2023-12-02 17:33:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43470 states, 43469 states have (on average 1.4143872644873359) internal successors, (61482), 43469 states have internal predecessors, (61482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43470 states to 43470 states and 61482 transitions. [2023-12-02 17:33:06,573 INFO L78 Accepts]: Start accepts. Automaton has 43470 states and 61482 transitions. Word has length 86 [2023-12-02 17:33:06,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:06,574 INFO L495 AbstractCegarLoop]: Abstraction has 43470 states and 61482 transitions. [2023-12-02 17:33:06,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:06,574 INFO L276 IsEmpty]: Start isEmpty. Operand 43470 states and 61482 transitions. [2023-12-02 17:33:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 17:33:06,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:06,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:06,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-12-02 17:33:06,577 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:06,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:06,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1349954028, now seen corresponding path program 1 times [2023-12-02 17:33:06,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:06,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862918068] [2023-12-02 17:33:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:06,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:06,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:06,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862918068] [2023-12-02 17:33:06,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862918068] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:06,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:06,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:06,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735282994] [2023-12-02 17:33:06,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:06,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:33:06,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:06,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:33:06,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:33:06,626 INFO L87 Difference]: Start difference. First operand 43470 states and 61482 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:06,861 INFO L93 Difference]: Finished difference Result 102754 states and 145210 transitions. [2023-12-02 17:33:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:33:06,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2023-12-02 17:33:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:06,934 INFO L225 Difference]: With dead ends: 102754 [2023-12-02 17:33:06,935 INFO L226 Difference]: Without dead ends: 67664 [2023-12-02 17:33:06,956 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 [2023-12-02 17:33:06,957 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 97 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:06,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 439 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67664 states. [2023-12-02 17:33:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67664 to 67662. [2023-12-02 17:33:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67662 states, 67661 states have (on average 1.4025805116684649) internal successors, (94900), 67661 states have internal predecessors, (94900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67662 states to 67662 states and 94900 transitions. [2023-12-02 17:33:07,707 INFO L78 Accepts]: Start accepts. Automaton has 67662 states and 94900 transitions. Word has length 89 [2023-12-02 17:33:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:07,707 INFO L495 AbstractCegarLoop]: Abstraction has 67662 states and 94900 transitions. [2023-12-02 17:33:07,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:07,707 INFO L276 IsEmpty]: Start isEmpty. Operand 67662 states and 94900 transitions. [2023-12-02 17:33:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 17:33:07,711 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:07,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:07,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-12-02 17:33:07,711 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:07,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1022691788, now seen corresponding path program 1 times [2023-12-02 17:33:07,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:07,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139064707] [2023-12-02 17:33:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:07,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:07,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:07,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139064707] [2023-12-02 17:33:07,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139064707] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:07,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:07,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:07,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20740369] [2023-12-02 17:33:07,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:07,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:33:07,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:07,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:33:07,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:33:07,971 INFO L87 Difference]: Start difference. First operand 67662 states and 94900 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:08,316 INFO L93 Difference]: Finished difference Result 128422 states and 181315 transitions. [2023-12-02 17:33:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:33:08,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2023-12-02 17:33:08,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:08,415 INFO L225 Difference]: With dead ends: 128422 [2023-12-02 17:33:08,415 INFO L226 Difference]: Without dead ends: 90372 [2023-12-02 17:33:08,441 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 [2023-12-02 17:33:08,442 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 88 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:08,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 378 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:08,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90372 states. [2023-12-02 17:33:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90372 to 84506. [2023-12-02 17:33:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84506 states, 84505 states have (on average 1.3972427667001952) internal successors, (118074), 84505 states have internal predecessors, (118074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84506 states to 84506 states and 118074 transitions. [2023-12-02 17:33:09,598 INFO L78 Accepts]: Start accepts. Automaton has 84506 states and 118074 transitions. Word has length 89 [2023-12-02 17:33:09,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:09,599 INFO L495 AbstractCegarLoop]: Abstraction has 84506 states and 118074 transitions. [2023-12-02 17:33:09,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 84506 states and 118074 transitions. [2023-12-02 17:33:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 17:33:09,719 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:09,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:09,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-12-02 17:33:09,719 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:09,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:09,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1614433842, now seen corresponding path program 1 times [2023-12-02 17:33:09,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:09,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502193685] [2023-12-02 17:33:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:09,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:09,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:09,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502193685] [2023-12-02 17:33:09,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502193685] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:09,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:09,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:09,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178280168] [2023-12-02 17:33:09,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:09,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:33:09,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:33:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:33:09,808 INFO L87 Difference]: Start difference. First operand 84506 states and 118074 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:10,249 INFO L93 Difference]: Finished difference Result 172106 states and 239838 transitions. [2023-12-02 17:33:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:33:10,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2023-12-02 17:33:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:10,400 INFO L225 Difference]: With dead ends: 172106 [2023-12-02 17:33:10,400 INFO L226 Difference]: Without dead ends: 116524 [2023-12-02 17:33:10,434 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 [2023-12-02 17:33:10,435 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 88 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:10,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 425 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116524 states. [2023-12-02 17:33:11,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116524 to 116522. [2023-12-02 17:33:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116522 states, 116521 states have (on average 1.3825319041202873) internal successors, (161094), 116521 states have internal predecessors, (161094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116522 states to 116522 states and 161094 transitions. [2023-12-02 17:33:12,281 INFO L78 Accepts]: Start accepts. Automaton has 116522 states and 161094 transitions. Word has length 92 [2023-12-02 17:33:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:12,281 INFO L495 AbstractCegarLoop]: Abstraction has 116522 states and 161094 transitions. [2023-12-02 17:33:12,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 116522 states and 161094 transitions. [2023-12-02 17:33:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 17:33:12,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:12,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:12,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-12-02 17:33:12,287 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:12,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:12,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1724678674, now seen corresponding path program 1 times [2023-12-02 17:33:12,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:12,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242704195] [2023-12-02 17:33:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:12,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:12,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:12,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242704195] [2023-12-02 17:33:12,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242704195] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:12,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:12,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:12,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106791589] [2023-12-02 17:33:12,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:12,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:33:12,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:12,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:33:12,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:33:12,396 INFO L87 Difference]: Start difference. First operand 116522 states and 161094 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:13,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:13,126 INFO L93 Difference]: Finished difference Result 243514 states and 338556 transitions. [2023-12-02 17:33:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:33:13,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2023-12-02 17:33:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:13,303 INFO L225 Difference]: With dead ends: 243514 [2023-12-02 17:33:13,303 INFO L226 Difference]: Without dead ends: 163768 [2023-12-02 17:33:13,338 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 [2023-12-02 17:33:13,339 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 83 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:13,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 359 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163768 states. [2023-12-02 17:33:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163768 to 151815. [2023-12-02 17:33:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151815 states, 151814 states have (on average 1.3730815339823732) internal successors, (208453), 151814 states have internal predecessors, (208453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151815 states to 151815 states and 208453 transitions. [2023-12-02 17:33:15,533 INFO L78 Accepts]: Start accepts. Automaton has 151815 states and 208453 transitions. Word has length 92 [2023-12-02 17:33:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:15,534 INFO L495 AbstractCegarLoop]: Abstraction has 151815 states and 208453 transitions. [2023-12-02 17:33:15,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 151815 states and 208453 transitions. [2023-12-02 17:33:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 17:33:15,540 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:15,540 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:15,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-12-02 17:33:15,540 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:15,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:15,540 INFO L85 PathProgramCache]: Analyzing trace with hash 483097146, now seen corresponding path program 1 times [2023-12-02 17:33:15,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:15,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145543919] [2023-12-02 17:33:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:15,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:15,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:15,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145543919] [2023-12-02 17:33:15,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145543919] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:15,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:15,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:15,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911643280] [2023-12-02 17:33:15,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:15,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:33:15,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:15,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:33:15,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:33:15,639 INFO L87 Difference]: Start difference. First operand 151815 states and 208453 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:16,863 INFO L93 Difference]: Finished difference Result 356083 states and 490172 transitions. [2023-12-02 17:33:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:33:16,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2023-12-02 17:33:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:17,207 INFO L225 Difference]: With dead ends: 356083 [2023-12-02 17:33:17,207 INFO L226 Difference]: Without dead ends: 223749 [2023-12-02 17:33:17,273 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 [2023-12-02 17:33:17,273 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 79 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:17,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 359 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223749 states. [2023-12-02 17:33:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223749 to 208891. [2023-12-02 17:33:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208891 states, 208890 states have (on average 1.363124132318445) internal successors, (284743), 208890 states have internal predecessors, (284743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208891 states to 208891 states and 284743 transitions. [2023-12-02 17:33:20,446 INFO L78 Accepts]: Start accepts. Automaton has 208891 states and 284743 transitions. Word has length 95 [2023-12-02 17:33:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:20,446 INFO L495 AbstractCegarLoop]: Abstraction has 208891 states and 284743 transitions. [2023-12-02 17:33:20,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 208891 states and 284743 transitions. [2023-12-02 17:33:20,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-02 17:33:20,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:20,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:20,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-12-02 17:33:20,454 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:20,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:20,454 INFO L85 PathProgramCache]: Analyzing trace with hash -228049215, now seen corresponding path program 1 times [2023-12-02 17:33:20,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:20,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800028834] [2023-12-02 17:33:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:20,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:33:20,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:20,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800028834] [2023-12-02 17:33:20,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800028834] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:20,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:20,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:20,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915829874] [2023-12-02 17:33:20,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:20,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:33:20,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:20,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:33:20,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:33:20,524 INFO L87 Difference]: Start difference. First operand 208891 states and 284743 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:21,704 INFO L93 Difference]: Finished difference Result 377287 states and 514979 transitions. [2023-12-02 17:33:21,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:33:21,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 100 [2023-12-02 17:33:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:21,932 INFO L225 Difference]: With dead ends: 377287 [2023-12-02 17:33:21,932 INFO L226 Difference]: Without dead ends: 170256 [2023-12-02 17:33:22,020 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 [2023-12-02 17:33:22,020 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 85 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:22,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 425 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170256 states. [2023-12-02 17:33:24,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170256 to 125211. [2023-12-02 17:33:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125211 states, 125210 states have (on average 1.3504672150786678) internal successors, (169092), 125210 states have internal predecessors, (169092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:24,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125211 states to 125211 states and 169092 transitions. [2023-12-02 17:33:24,416 INFO L78 Accepts]: Start accepts. Automaton has 125211 states and 169092 transitions. Word has length 100 [2023-12-02 17:33:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:24,416 INFO L495 AbstractCegarLoop]: Abstraction has 125211 states and 169092 transitions. [2023-12-02 17:33:24,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 125211 states and 169092 transitions. [2023-12-02 17:33:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 17:33:24,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:24,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:24,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-12-02 17:33:24,427 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:24,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:24,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1835246973, now seen corresponding path program 1 times [2023-12-02 17:33:24,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:24,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744269728] [2023-12-02 17:33:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:24,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:33:24,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:24,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744269728] [2023-12-02 17:33:24,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744269728] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:24,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:24,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:33:24,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814203933] [2023-12-02 17:33:24,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:24,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:33:24,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:24,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:33:24,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:33:24,870 INFO L87 Difference]: Start difference. First operand 125211 states and 169092 transitions. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:26,013 INFO L93 Difference]: Finished difference Result 380338 states and 512368 transitions. [2023-12-02 17:33:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:33:26,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 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 113 [2023-12-02 17:33:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:26,325 INFO L225 Difference]: With dead ends: 380338 [2023-12-02 17:33:26,326 INFO L226 Difference]: Without dead ends: 257228 [2023-12-02 17:33:26,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:33:26,406 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1244 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:26,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1244 Valid, 355 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:33:26,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257228 states. [2023-12-02 17:33:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257228 to 189980. [2023-12-02 17:33:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189980 states, 189979 states have (on average 1.3408692539701756) internal successors, (254737), 189979 states have internal predecessors, (254737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189980 states to 189980 states and 254737 transitions. [2023-12-02 17:33:29,470 INFO L78 Accepts]: Start accepts. Automaton has 189980 states and 254737 transitions. Word has length 113 [2023-12-02 17:33:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:29,470 INFO L495 AbstractCegarLoop]: Abstraction has 189980 states and 254737 transitions. [2023-12-02 17:33:29,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:33:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 189980 states and 254737 transitions. [2023-12-02 17:33:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 17:33:29,481 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:29,481 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:29,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-12-02 17:33:29,481 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:29,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:29,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1873678472, now seen corresponding path program 1 times [2023-12-02 17:33:29,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:29,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008626665] [2023-12-02 17:33:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:32,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:32,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008626665] [2023-12-02 17:33:32,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008626665] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:33:32,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77641018] [2023-12-02 17:33:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:32,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:32,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:33:32,094 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:33:32,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ced7f2e-33db-4ce2-a06c-2a1ef901a2c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:33:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:32,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 109 conjunts are in the unsatisfiable core [2023-12-02 17:33:32,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:35,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:35:18,937 WARN L293 SmtUtils]: Spent 20.41s on a formula simplification. DAG size of input: 684 DAG size of output: 594 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:36:45,866 WARN L293 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 598 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:39:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:39:10,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77641018] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:39:10,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1999789215] [2023-12-02 17:39:10,764 INFO L159 IcfgInterpreter]: Started Sifa with 97 locations of interest [2023-12-02 17:39:10,764 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:39:10,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:39:10,772 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:39:10,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:39:26,663 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:40:34,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4790894#(and (<= 0 ~mode4~0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= |ULTIMATE.start_main_~check__tmp~1#1| 1) (<= 0 ~mode3~0) (<= |ULTIMATE.start_main_~assert__arg~1#1| 1) (<= ~__return_59759~0 1) (<= 0 ~mode2~0) (<= |ULTIMATE.start_main_~__tmp_2~0#1| 1) (= (mod |ULTIMATE.start_main_~assert__arg~1#1| 256) 0) (<= 0 ~mode5~0))' at error location [2023-12-02 17:40:34,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:40:34,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:40:34,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 17] total 70 [2023-12-02 17:40:34,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655831240] [2023-12-02 17:40:34,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:40:34,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-12-02 17:40:34,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:40:34,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-12-02 17:40:34,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2691, Invalid=20871, Unknown=0, NotChecked=0, Total=23562 [2023-12-02 17:40:34,561 INFO L87 Difference]: Start difference. First operand 189980 states and 254737 transitions. Second operand has 70 states, 70 states have (on average 4.814285714285714) internal successors, (337), 70 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:41:20,113 WARN L293 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 883 DAG size of output: 391 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:41:30,971 WARN L293 SmtUtils]: Spent 8.81s on a formula simplification. DAG size of input: 777 DAG size of output: 423 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:41:40,317 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification. DAG size of input: 783 DAG size of output: 281 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:41:53,477 WARN L293 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 601 DAG size of output: 605 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:42:02,226 WARN L293 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 720 DAG size of output: 728 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:42:17,662 WARN L293 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 777 DAG size of output: 415 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:42:45,969 WARN L293 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 719 DAG size of output: 416 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:43:05,839 WARN L293 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 879 DAG size of output: 477 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)