./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.07.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.07.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5 --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 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:55:38,081 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:55:38,209 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:55:38,214 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:55:38,214 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:55:38,262 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:55:38,263 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:55:38,264 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:55:38,265 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:55:38,270 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:55:38,270 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:55:38,271 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:55:38,272 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:55:38,273 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:55:38,274 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:55:38,275 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:55:38,275 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:55:38,275 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:55:38,276 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:55:38,277 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:55:38,277 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:55:38,278 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:55:38,279 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:55:38,280 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:55:38,280 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:55:38,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:55:38,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:55:38,281 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:55:38,282 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:55:38,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:55:38,284 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:55:38,284 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:55:38,284 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:55:38,285 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:55:38,285 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:55:38,285 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:55:38,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:55:38,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:55:38,286 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:55:38,287 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:55:38,287 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:55:38,289 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:55:38,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:55:38,289 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:55:38,290 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:55:38,290 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:55:38,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:55:38,291 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_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f [2023-11-21 19:55:38,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:55:38,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:55:38,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:55:38,662 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:55:38,663 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:55:38,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/systemc/transmitter.07.cil.c [2023-11-21 19:55:41,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:55:42,116 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:55:42,117 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/sv-benchmarks/c/systemc/transmitter.07.cil.c [2023-11-21 19:55:42,132 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/data/8de428447/e2d58684bdd54eacb32c8d898c143f81/FLAGc4dcbcd26 [2023-11-21 19:55:42,147 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/data/8de428447/e2d58684bdd54eacb32c8d898c143f81 [2023-11-21 19:55:42,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:55:42,152 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:55:42,153 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:55:42,153 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:55:42,158 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:55:42,159 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,160 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24144a45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42, skipping insertion in model container [2023-11-21 19:55:42,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,217 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:55:42,369 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_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2023-11-21 19:55:42,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:55:42,513 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:55:42,526 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_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2023-11-21 19:55:42,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:55:42,613 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:55:42,613 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42 WrapperNode [2023-11-21 19:55:42,614 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:55:42,615 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:55:42,615 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:55:42,615 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:55:42,623 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,636 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,681 INFO L138 Inliner]: procedures = 42, calls = 51, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 564 [2023-11-21 19:55:42,682 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:55:42,682 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:55:42,683 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:55:42,683 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:55:42,692 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,697 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,697 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,709 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,719 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,724 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,727 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,733 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:55:42,734 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:55:42,735 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:55:42,735 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:55:42,736 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42" (1/1) ... [2023-11-21 19:55:42,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:55:42,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:55:42,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:55:42,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aafa8d-504a-43ba-8fdc-ace1b8af06fa/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:55:42,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:55:42,828 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-21 19:55:42,828 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-21 19:55:42,829 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-21 19:55:42,829 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-21 19:55:42,829 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 19:55:42,829 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 19:55:42,830 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-21 19:55:42,830 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-21 19:55:42,830 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-21 19:55:42,830 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-21 19:55:42,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:55:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-21 19:55:42,831 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-21 19:55:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:55:42,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:55:42,933 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:55:42,935 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:55:43,708 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:55:44,138 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:55:44,138 INFO L308 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-21 19:55:44,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:55:44 BoogieIcfgContainer [2023-11-21 19:55:44,141 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:55:44,145 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:55:44,146 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:55:44,149 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:55:44,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:55:42" (1/3) ... [2023-11-21 19:55:44,151 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43288d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:55:44, skipping insertion in model container [2023-11-21 19:55:44,151 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:55:42" (2/3) ... [2023-11-21 19:55:44,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43288d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:55:44, skipping insertion in model container [2023-11-21 19:55:44,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:55:44" (3/3) ... [2023-11-21 19:55:44,154 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.07.cil.c [2023-11-21 19:55:44,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:55:44,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:55:44,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:55:44,246 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;@311d1027, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:55:44,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:55:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 139 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 113 states have internal predecessors, (167), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-21 19:55:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 19:55:44,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:55:44,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:55:44,285 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:55:44,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:55:44,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1172990225, now seen corresponding path program 1 times [2023-11-21 19:55:44,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:55:44,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729330770] [2023-11-21 19:55:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:55:44,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:55:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:55:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:55:44,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:55:44,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729330770] [2023-11-21 19:55:44,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729330770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:55:44,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:55:44,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:55:44,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157899207] [2023-11-21 19:55:44,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:55:44,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:55:44,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:55:44,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:55:44,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:55:44,935 INFO L87 Difference]: Start difference. First operand has 139 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 113 states have internal predecessors, (167), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:55:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:55:45,463 INFO L93 Difference]: Finished difference Result 404 states and 611 transitions. [2023-11-21 19:55:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:55:45,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-21 19:55:45,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:55:45,487 INFO L225 Difference]: With dead ends: 404 [2023-11-21 19:55:45,487 INFO L226 Difference]: Without dead ends: 266 [2023-11-21 19:55:45,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:55:45,500 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 358 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:55:45,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 554 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 19:55:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-11-21 19:55:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2023-11-21 19:55:45,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 213 states have (on average 1.4507042253521127) internal successors, (309), 215 states have internal predecessors, (309), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-21 19:55:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 381 transitions. [2023-11-21 19:55:45,609 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 381 transitions. Word has length 57 [2023-11-21 19:55:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:55:45,610 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 381 transitions. [2023-11-21 19:55:45,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:55:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 381 transitions. [2023-11-21 19:55:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 19:55:45,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:55:45,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:55:45,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:55:45,622 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:55:45,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:55:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1228534896, now seen corresponding path program 1 times [2023-11-21 19:55:45,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:55:45,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367040069] [2023-11-21 19:55:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:55:45,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:55:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:55:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:55:45,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:55:45,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367040069] [2023-11-21 19:55:45,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367040069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:55:45,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:55:45,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:55:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228946076] [2023-11-21 19:55:45,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:55:45,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:55:45,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:55:45,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:55:45,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:55:45,909 INFO L87 Difference]: Start difference. First operand 262 states and 381 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:55:46,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:55:46,669 INFO L93 Difference]: Finished difference Result 1513 states and 2309 transitions. [2023-11-21 19:55:46,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:55:46,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-21 19:55:46,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:55:46,685 INFO L225 Difference]: With dead ends: 1513 [2023-11-21 19:55:46,686 INFO L226 Difference]: Without dead ends: 1256 [2023-11-21 19:55:46,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:55:46,690 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 808 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:55:46,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 829 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 19:55:46,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2023-11-21 19:55:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1220. [2023-11-21 19:55:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1007 states have (on average 1.4428997020854022) internal successors, (1453), 1015 states have internal predecessors, (1453), 152 states have call successors, (152), 60 states have call predecessors, (152), 60 states have return successors, (226), 145 states have call predecessors, (226), 152 states have call successors, (226) [2023-11-21 19:55:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1831 transitions. [2023-11-21 19:55:46,827 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1831 transitions. Word has length 57 [2023-11-21 19:55:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:55:46,828 INFO L495 AbstractCegarLoop]: Abstraction has 1220 states and 1831 transitions. [2023-11-21 19:55:46,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:55:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1831 transitions. [2023-11-21 19:55:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 19:55:46,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:55:46,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:55:46,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:55:46,832 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:55:46,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:55:46,836 INFO L85 PathProgramCache]: Analyzing trace with hash 743360177, now seen corresponding path program 1 times [2023-11-21 19:55:46,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:55:46,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911162744] [2023-11-21 19:55:46,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:55:46,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:55:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:55:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:55:47,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:55:47,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911162744] [2023-11-21 19:55:47,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911162744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:55:47,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:55:47,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:55:47,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256885065] [2023-11-21 19:55:47,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:55:47,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:55:47,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:55:47,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:55:47,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:55:47,018 INFO L87 Difference]: Start difference. First operand 1220 states and 1831 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:55:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:55:47,848 INFO L93 Difference]: Finished difference Result 4803 states and 7407 transitions. [2023-11-21 19:55:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:55:47,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-21 19:55:47,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:55:47,880 INFO L225 Difference]: With dead ends: 4803 [2023-11-21 19:55:47,880 INFO L226 Difference]: Without dead ends: 3588 [2023-11-21 19:55:47,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:55:47,888 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 811 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:55:47,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 832 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:55:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2023-11-21 19:55:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 3334. [2023-11-21 19:55:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 2815 states have (on average 1.4525754884547069) internal successors, (4089), 2797 states have internal predecessors, (4089), 354 states have call successors, (354), 148 states have call predecessors, (354), 164 states have return successors, (668), 389 states have call predecessors, (668), 354 states have call successors, (668) [2023-11-21 19:55:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 5111 transitions. [2023-11-21 19:55:48,185 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 5111 transitions. Word has length 57 [2023-11-21 19:55:48,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:55:48,187 INFO L495 AbstractCegarLoop]: Abstraction has 3334 states and 5111 transitions. [2023-11-21 19:55:48,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:55:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 5111 transitions. [2023-11-21 19:55:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 19:55:48,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:55:48,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:55:48,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:55:48,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:55:48,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:55:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1266680848, now seen corresponding path program 1 times [2023-11-21 19:55:48,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:55:48,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687276744] [2023-11-21 19:55:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:55:48,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:55:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:55:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:55:48,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:55:48,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687276744] [2023-11-21 19:55:48,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687276744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:55:48,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:55:48,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:55:48,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580463127] [2023-11-21 19:55:48,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:55:48,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:55:48,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:55:48,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:55:48,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:55:48,365 INFO L87 Difference]: Start difference. First operand 3334 states and 5111 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:55:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:55:49,366 INFO L93 Difference]: Finished difference Result 12271 states and 19429 transitions. [2023-11-21 19:55:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:55:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-21 19:55:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:55:49,437 INFO L225 Difference]: With dead ends: 12271 [2023-11-21 19:55:49,437 INFO L226 Difference]: Without dead ends: 8942 [2023-11-21 19:55:49,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:55:49,455 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 807 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:55:49,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 832 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:55:49,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8942 states. [2023-11-21 19:55:49,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8942 to 8374. [2023-11-21 19:55:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8374 states, 7153 states have (on average 1.4607856843282538) internal successors, (10449), 7053 states have internal predecessors, (10449), 800 states have call successors, (800), 348 states have call predecessors, (800), 420 states have return successors, (1868), 973 states have call predecessors, (1868), 800 states have call successors, (1868) [2023-11-21 19:55:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8374 states to 8374 states and 13117 transitions. [2023-11-21 19:55:50,135 INFO L78 Accepts]: Start accepts. Automaton has 8374 states and 13117 transitions. Word has length 57 [2023-11-21 19:55:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:55:50,135 INFO L495 AbstractCegarLoop]: Abstraction has 8374 states and 13117 transitions. [2023-11-21 19:55:50,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:55:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 8374 states and 13117 transitions. [2023-11-21 19:55:50,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 19:55:50,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:55:50,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:55:50,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:55:50,138 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:55:50,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:55:50,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2109311825, now seen corresponding path program 1 times [2023-11-21 19:55:50,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:55:50,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804828483] [2023-11-21 19:55:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:55:50,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:55:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:55:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:55:50,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:55:50,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804828483] [2023-11-21 19:55:50,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804828483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:55:50,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:55:50,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:55:50,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737253237] [2023-11-21 19:55:50,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:55:50,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:55:50,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:55:50,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:55:50,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:55:50,240 INFO L87 Difference]: Start difference. First operand 8374 states and 13117 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:55:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:55:51,860 INFO L93 Difference]: Finished difference Result 30337 states and 49686 transitions. [2023-11-21 19:55:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:55:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2023-11-21 19:55:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:55:52,081 INFO L225 Difference]: With dead ends: 30337 [2023-11-21 19:55:52,082 INFO L226 Difference]: Without dead ends: 21968 [2023-11-21 19:55:52,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:55:52,137 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 804 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:55:52,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 832 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 19:55:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21968 states. [2023-11-21 19:55:53,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21968 to 20654. [2023-11-21 19:55:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20654 states, 17721 states have (on average 1.462840697477569) internal successors, (25923), 17279 states have internal predecessors, (25923), 1856 states have call successors, (1856), 820 states have call predecessors, (1856), 1076 states have return successors, (5404), 2555 states have call predecessors, (5404), 1856 states have call successors, (5404) [2023-11-21 19:55:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20654 states to 20654 states and 33183 transitions. [2023-11-21 19:55:53,947 INFO L78 Accepts]: Start accepts. Automaton has 20654 states and 33183 transitions. Word has length 57 [2023-11-21 19:55:53,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:55:53,948 INFO L495 AbstractCegarLoop]: Abstraction has 20654 states and 33183 transitions. [2023-11-21 19:55:53,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:55:53,949 INFO L276 IsEmpty]: Start isEmpty. Operand 20654 states and 33183 transitions. [2023-11-21 19:55:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-21 19:55:53,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:55:53,951 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] [2023-11-21 19:55:53,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:55:53,952 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:55:53,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:55:53,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1711080414, now seen corresponding path program 1 times [2023-11-21 19:55:53,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:55:53,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912974809] [2023-11-21 19:55:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:55:53,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:55:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:55:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:55:54,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:55:54,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912974809] [2023-11-21 19:55:54,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912974809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:55:54,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:55:54,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:55:54,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874752154] [2023-11-21 19:55:54,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:55:54,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:55:54,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:55:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:55:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:55:54,238 INFO L87 Difference]: Start difference. First operand 20654 states and 33183 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:55:56,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:55:56,613 INFO L93 Difference]: Finished difference Result 55804 states and 90189 transitions. [2023-11-21 19:55:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:55:56,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-11-21 19:55:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:55:56,843 INFO L225 Difference]: With dead ends: 55804 [2023-11-21 19:55:56,844 INFO L226 Difference]: Without dead ends: 35156 [2023-11-21 19:55:56,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:55:56,920 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 568 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:55:56,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 536 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:55:57,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35156 states. [2023-11-21 19:55:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35156 to 32883. [2023-11-21 19:55:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32883 states, 28264 states have (on average 1.448804132465327) internal successors, (40949), 27673 states have internal predecessors, (40949), 2782 states have call successors, (2782), 1324 states have call predecessors, (2782), 1836 states have return successors, (8104), 3886 states have call predecessors, (8104), 2782 states have call successors, (8104) [2023-11-21 19:55:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32883 states to 32883 states and 51835 transitions. [2023-11-21 19:55:59,974 INFO L78 Accepts]: Start accepts. Automaton has 32883 states and 51835 transitions. Word has length 61 [2023-11-21 19:55:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:55:59,976 INFO L495 AbstractCegarLoop]: Abstraction has 32883 states and 51835 transitions. [2023-11-21 19:55:59,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:55:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 32883 states and 51835 transitions. [2023-11-21 19:55:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-21 19:55:59,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:55:59,979 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] [2023-11-21 19:55:59,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:55:59,980 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:55:59,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:55:59,980 INFO L85 PathProgramCache]: Analyzing trace with hash 29338996, now seen corresponding path program 1 times [2023-11-21 19:55:59,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:55:59,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360024728] [2023-11-21 19:55:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:55:59,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:56:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:56:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:56:00,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:56:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360024728] [2023-11-21 19:56:00,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360024728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:56:00,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:56:00,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:56:00,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591826491] [2023-11-21 19:56:00,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:56:00,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:56:00,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:56:00,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:56:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:56:00,275 INFO L87 Difference]: Start difference. First operand 32883 states and 51835 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:56:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:56:03,638 INFO L93 Difference]: Finished difference Result 87477 states and 140329 transitions. [2023-11-21 19:56:03,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:56:03,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2023-11-21 19:56:03,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:56:04,079 INFO L225 Difference]: With dead ends: 87477 [2023-11-21 19:56:04,079 INFO L226 Difference]: Without dead ends: 54600 [2023-11-21 19:56:04,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:56:04,158 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 495 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:56:04,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 519 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:56:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54600 states. [2023-11-21 19:56:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54600 to 51534. [2023-11-21 19:56:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51534 states, 44373 states have (on average 1.4455186712640569) internal successors, (64142), 43675 states have internal predecessors, (64142), 4360 states have call successors, (4360), 2136 states have call predecessors, (4360), 2800 states have return successors, (12931), 5723 states have call predecessors, (12931), 4360 states have call successors, (12931) [2023-11-21 19:56:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51534 states to 51534 states and 81433 transitions. [2023-11-21 19:56:08,394 INFO L78 Accepts]: Start accepts. Automaton has 51534 states and 81433 transitions. Word has length 63 [2023-11-21 19:56:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:56:08,394 INFO L495 AbstractCegarLoop]: Abstraction has 51534 states and 81433 transitions. [2023-11-21 19:56:08,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:56:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 51534 states and 81433 transitions. [2023-11-21 19:56:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-21 19:56:08,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:56:08,397 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] [2023-11-21 19:56:08,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 19:56:08,398 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:56:08,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:56:08,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1652007783, now seen corresponding path program 1 times [2023-11-21 19:56:08,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:56:08,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878662943] [2023-11-21 19:56:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:56:08,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:56:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:56:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:56:08,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:56:08,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878662943] [2023-11-21 19:56:08,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878662943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:56:08,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:56:08,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:56:08,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189617363] [2023-11-21 19:56:08,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:56:08,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:56:08,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:56:08,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:56:08,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:56:08,642 INFO L87 Difference]: Start difference. First operand 51534 states and 81433 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:56:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:56:13,832 INFO L93 Difference]: Finished difference Result 137846 states and 221916 transitions. [2023-11-21 19:56:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:56:13,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2023-11-21 19:56:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:56:14,436 INFO L225 Difference]: With dead ends: 137846 [2023-11-21 19:56:14,437 INFO L226 Difference]: Without dead ends: 86318 [2023-11-21 19:56:14,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:56:14,553 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 525 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 19:56:14,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 542 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 19:56:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86318 states. [2023-11-21 19:56:20,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86318 to 82180. [2023-11-21 19:56:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82180 states, 70837 states have (on average 1.4391772661179891) internal successors, (101947), 70037 states have internal predecessors, (101947), 6970 states have call successors, (6970), 3516 states have call predecessors, (6970), 4372 states have return successors, (21046), 8627 states have call predecessors, (21046), 6970 states have call successors, (21046) [2023-11-21 19:56:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82180 states to 82180 states and 129963 transitions. [2023-11-21 19:56:20,602 INFO L78 Accepts]: Start accepts. Automaton has 82180 states and 129963 transitions. Word has length 65 [2023-11-21 19:56:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:56:20,603 INFO L495 AbstractCegarLoop]: Abstraction has 82180 states and 129963 transitions. [2023-11-21 19:56:20,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:56:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 82180 states and 129963 transitions. [2023-11-21 19:56:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-21 19:56:20,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:56:20,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:56:20,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 19:56:20,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:56:20,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:56:20,608 INFO L85 PathProgramCache]: Analyzing trace with hash 877780468, now seen corresponding path program 1 times [2023-11-21 19:56:20,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:56:20,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699614902] [2023-11-21 19:56:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:56:20,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:56:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:56:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:56:20,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:56:20,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699614902] [2023-11-21 19:56:20,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699614902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:56:20,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:56:20,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:56:20,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474641442] [2023-11-21 19:56:20,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:56:20,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:56:20,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:56:20,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:56:20,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:56:20,871 INFO L87 Difference]: Start difference. First operand 82180 states and 129963 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)