./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 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_adad0206-5460-42e5-b4a5-e91951e9a66a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adad0206-5460-42e5-b4a5-e91951e9a66a/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_adad0206-5460-42e5-b4a5-e91951e9a66a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adad0206-5460-42e5-b4a5-e91951e9a66a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.07.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adad0206-5460-42e5-b4a5-e91951e9a66a/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_adad0206-5460-42e5-b4a5-e91951e9a66a/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 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:37:14,326 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:37:14,390 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adad0206-5460-42e5-b4a5-e91951e9a66a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:37:14,394 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:37:14,394 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:37:14,419 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:37:14,419 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:37:14,420 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:37:14,421 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:37:14,421 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:37:14,422 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:37:14,422 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:37:14,423 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:37:14,423 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:37:14,424 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:37:14,424 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:37:14,425 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:37:14,425 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:37:14,425 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:37:14,426 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:37:14,426 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:37:14,427 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:37:14,428 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:37:14,428 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:37:14,429 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:37:14,429 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:37:14,430 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:37:14,430 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:37:14,430 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:37:14,431 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:37:14,431 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:37:14,431 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:37:14,432 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:37:14,432 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:37:14,432 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:37:14,432 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:37:14,432 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:37:14,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:37:14,433 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:37:14,433 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:37:14,433 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:37:14,434 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:37:14,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:37:14,434 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:37:14,434 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:37:14,434 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:37:14,435 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:37:14,435 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_adad0206-5460-42e5-b4a5-e91951e9a66a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adad0206-5460-42e5-b4a5-e91951e9a66a/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f [2023-12-02 12:37:14,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:37:14,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:37:14,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:37:14,686 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:37:14,687 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:37:14,688 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adad0206-5460-42e5-b4a5-e91951e9a66a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/systemc/transmitter.07.cil.c [2023-12-02 12:37:17,447 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:37:17,658 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:37:17,659 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adad0206-5460-42e5-b4a5-e91951e9a66a/sv-benchmarks/c/systemc/transmitter.07.cil.c [2023-12-02 12:37:17,674 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adad0206-5460-42e5-b4a5-e91951e9a66a/bin/utaipan-verify-nQ1chXbOIh/data/ec48d7452/54f67172a2154595a12a9e207382a535/FLAG1de1b8ec3 [2023-12-02 12:37:17,688 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adad0206-5460-42e5-b4a5-e91951e9a66a/bin/utaipan-verify-nQ1chXbOIh/data/ec48d7452/54f67172a2154595a12a9e207382a535 [2023-12-02 12:37:17,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:37:17,692 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:37:17,693 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:37:17,694 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:37:17,699 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:37:17,700 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:37:17" (1/1) ... [2023-12-02 12:37:17,701 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@90d5dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:17, skipping insertion in model container [2023-12-02 12:37:17,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:37:17" (1/1) ... [2023-12-02 12:37:17,747 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:37:17,893 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_adad0206-5460-42e5-b4a5-e91951e9a66a/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2023-12-02 12:37:17,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:37:17,994 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:37:18,006 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_adad0206-5460-42e5-b4a5-e91951e9a66a/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2023-12-02 12:37:18,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:37:18,069 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:37:18,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18 WrapperNode [2023-12-02 12:37:18,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:37:18,071 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:37:18,071 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:37:18,071 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:37:18,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,091 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,126 INFO L138 Inliner]: procedures = 42, calls = 51, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 564 [2023-12-02 12:37:18,126 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:37:18,127 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:37:18,127 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:37:18,127 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:37:18,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,142 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,142 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,154 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,164 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,170 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,175 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:37:18,175 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:37:18,176 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:37:18,176 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:37:18,176 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (1/1) ... [2023-12-02 12:37:18,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:37:18,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adad0206-5460-42e5-b4a5-e91951e9a66a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:37:18,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adad0206-5460-42e5-b4a5-e91951e9a66a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:37:18,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adad0206-5460-42e5-b4a5-e91951e9a66a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:37:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:37:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 12:37:18,241 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 12:37:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 12:37:18,241 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 12:37:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 12:37:18,241 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 12:37:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 12:37:18,242 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 12:37:18,242 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 12:37:18,242 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 12:37:18,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:37:18,242 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 12:37:18,243 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 12:37:18,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:37:18,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:37:18,333 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:37:18,336 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:37:18,864 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:37:19,190 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:37:19,191 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-12-02 12:37:19,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:37:19 BoogieIcfgContainer [2023-12-02 12:37:19,193 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:37:19,195 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:37:19,195 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:37:19,199 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:37:19,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:37:17" (1/3) ... [2023-12-02 12:37:19,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1b1156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:37:19, skipping insertion in model container [2023-12-02 12:37:19,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:37:18" (2/3) ... [2023-12-02 12:37:19,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1b1156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:37:19, skipping insertion in model container [2023-12-02 12:37:19,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:37:19" (3/3) ... [2023-12-02 12:37:19,202 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.07.cil.c [2023-12-02 12:37:19,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:37:19,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:37:19,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:37:19,282 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;@aede695, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:37:19,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:37:19,287 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) [2023-12-02 12:37:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 12:37:19,299 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:19,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:37:19,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:19,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1172990225, now seen corresponding path program 1 times [2023-12-02 12:37:19,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:19,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557134806] [2023-12-02 12:37:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:19,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:19,700 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 12:37:19,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:19,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557134806] [2023-12-02 12:37:19,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557134806] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:19,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:19,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:37:19,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48674392] [2023-12-02 12:37:19,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:19,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:37:19,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:19,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:37:19,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:37:19,744 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) [2023-12-02 12:37:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:20,145 INFO L93 Difference]: Finished difference Result 404 states and 611 transitions. [2023-12-02 12:37:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:37:20,147 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 [2023-12-02 12:37:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:20,159 INFO L225 Difference]: With dead ends: 404 [2023-12-02 12:37:20,160 INFO L226 Difference]: Without dead ends: 266 [2023-12-02 12:37:20,165 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 [2023-12-02 12:37:20,169 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:20,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 554 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:37:20,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-12-02 12:37:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2023-12-02 12:37:20,236 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) [2023-12-02 12:37:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 381 transitions. [2023-12-02 12:37:20,241 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 381 transitions. Word has length 57 [2023-12-02 12:37:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:20,242 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 381 transitions. [2023-12-02 12:37:20,242 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) [2023-12-02 12:37:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 381 transitions. [2023-12-02 12:37:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 12:37:20,246 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:20,246 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] [2023-12-02 12:37:20,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:37:20,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:20,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1228534896, now seen corresponding path program 1 times [2023-12-02 12:37:20,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:20,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174977257] [2023-12-02 12:37:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:20,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:20,406 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 12:37:20,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:20,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174977257] [2023-12-02 12:37:20,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174977257] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:20,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:20,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:37:20,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730741682] [2023-12-02 12:37:20,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:20,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:37:20,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:20,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:37:20,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:37:20,410 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) [2023-12-02 12:37:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:21,122 INFO L93 Difference]: Finished difference Result 1513 states and 2309 transitions. [2023-12-02 12:37:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:37:21,123 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 [2023-12-02 12:37:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:21,137 INFO L225 Difference]: With dead ends: 1513 [2023-12-02 12:37:21,137 INFO L226 Difference]: Without dead ends: 1256 [2023-12-02 12:37:21,141 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 [2023-12-02 12:37:21,143 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 [2023-12-02 12:37:21,144 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] [2023-12-02 12:37:21,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2023-12-02 12:37:21,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1220. [2023-12-02 12:37:21,241 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) [2023-12-02 12:37:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1831 transitions. [2023-12-02 12:37:21,250 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1831 transitions. Word has length 57 [2023-12-02 12:37:21,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:21,251 INFO L495 AbstractCegarLoop]: Abstraction has 1220 states and 1831 transitions. [2023-12-02 12:37:21,251 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) [2023-12-02 12:37:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1831 transitions. [2023-12-02 12:37:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 12:37:21,254 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:21,254 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] [2023-12-02 12:37:21,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:37:21,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:21,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:21,255 INFO L85 PathProgramCache]: Analyzing trace with hash 743360177, now seen corresponding path program 1 times [2023-12-02 12:37:21,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:21,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289260819] [2023-12-02 12:37:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:21,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:21,357 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 12:37:21,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:21,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289260819] [2023-12-02 12:37:21,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289260819] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:21,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:21,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:37:21,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096982194] [2023-12-02 12:37:21,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:21,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:37:21,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:37:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:37:21,361 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) [2023-12-02 12:37:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:21,994 INFO L93 Difference]: Finished difference Result 4803 states and 7407 transitions. [2023-12-02 12:37:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:37:21,996 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 [2023-12-02 12:37:21,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:22,018 INFO L225 Difference]: With dead ends: 4803 [2023-12-02 12:37:22,018 INFO L226 Difference]: Without dead ends: 3588 [2023-12-02 12:37:22,024 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 [2023-12-02 12:37:22,025 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, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:22,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 832 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:37:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2023-12-02 12:37:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 3334. [2023-12-02 12:37:22,182 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) [2023-12-02 12:37:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 5111 transitions. [2023-12-02 12:37:22,204 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 5111 transitions. Word has length 57 [2023-12-02 12:37:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:22,205 INFO L495 AbstractCegarLoop]: Abstraction has 3334 states and 5111 transitions. [2023-12-02 12:37:22,205 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) [2023-12-02 12:37:22,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 5111 transitions. [2023-12-02 12:37:22,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 12:37:22,208 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:22,208 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] [2023-12-02 12:37:22,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:37:22,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:22,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:22,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1266680848, now seen corresponding path program 1 times [2023-12-02 12:37:22,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:22,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824876388] [2023-12-02 12:37:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:22,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:22,323 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 12:37:22,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:22,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824876388] [2023-12-02 12:37:22,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824876388] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:22,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:22,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:37:22,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081353786] [2023-12-02 12:37:22,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:22,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:37:22,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:22,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:37:22,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:37:22,326 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) [2023-12-02 12:37:23,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:23,192 INFO L93 Difference]: Finished difference Result 12271 states and 19429 transitions. [2023-12-02 12:37:23,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:37:23,192 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 [2023-12-02 12:37:23,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:23,270 INFO L225 Difference]: With dead ends: 12271 [2023-12-02 12:37:23,270 INFO L226 Difference]: Without dead ends: 8942 [2023-12-02 12:37:23,289 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 [2023-12-02 12:37:23,290 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 807 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:23,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 832 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:37:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8942 states. [2023-12-02 12:37:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8942 to 8374. [2023-12-02 12:37:23,860 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) [2023-12-02 12:37:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8374 states to 8374 states and 13117 transitions. [2023-12-02 12:37:23,909 INFO L78 Accepts]: Start accepts. Automaton has 8374 states and 13117 transitions. Word has length 57 [2023-12-02 12:37:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:23,910 INFO L495 AbstractCegarLoop]: Abstraction has 8374 states and 13117 transitions. [2023-12-02 12:37:23,910 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) [2023-12-02 12:37:23,910 INFO L276 IsEmpty]: Start isEmpty. Operand 8374 states and 13117 transitions. [2023-12-02 12:37:23,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 12:37:23,912 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:23,912 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] [2023-12-02 12:37:23,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:37:23,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:23,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:23,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2109311825, now seen corresponding path program 1 times [2023-12-02 12:37:23,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:23,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911343675] [2023-12-02 12:37:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:23,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:37:24,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:24,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911343675] [2023-12-02 12:37:24,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911343675] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:24,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:24,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:37:24,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030249990] [2023-12-02 12:37:24,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:24,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:37:24,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:24,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:37:24,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:37:24,016 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) [2023-12-02 12:37:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:25,432 INFO L93 Difference]: Finished difference Result 30337 states and 49686 transitions. [2023-12-02 12:37:25,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:37:25,433 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 [2023-12-02 12:37:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:25,600 INFO L225 Difference]: With dead ends: 30337 [2023-12-02 12:37:25,600 INFO L226 Difference]: Without dead ends: 21968 [2023-12-02 12:37:25,641 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 [2023-12-02 12:37:25,642 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, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:25,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 832 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:37:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21968 states. [2023-12-02 12:37:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21968 to 20654. [2023-12-02 12:37:26,977 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) [2023-12-02 12:37:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20654 states to 20654 states and 33183 transitions. [2023-12-02 12:37:27,063 INFO L78 Accepts]: Start accepts. Automaton has 20654 states and 33183 transitions. Word has length 57 [2023-12-02 12:37:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:27,063 INFO L495 AbstractCegarLoop]: Abstraction has 20654 states and 33183 transitions. [2023-12-02 12:37:27,063 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) [2023-12-02 12:37:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20654 states and 33183 transitions. [2023-12-02 12:37:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 12:37:27,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:27,066 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] [2023-12-02 12:37:27,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 12:37:27,066 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:27,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:27,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1711080414, now seen corresponding path program 1 times [2023-12-02 12:37:27,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:27,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106675417] [2023-12-02 12:37:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:27,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:27,273 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 12:37:27,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:27,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106675417] [2023-12-02 12:37:27,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106675417] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:27,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:27,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:37:27,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497541422] [2023-12-02 12:37:27,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:27,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:37:27,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:27,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:37:27,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:37:27,276 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) [2023-12-02 12:37:29,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:29,149 INFO L93 Difference]: Finished difference Result 55804 states and 90189 transitions. [2023-12-02 12:37:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:37:29,151 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 [2023-12-02 12:37:29,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:29,339 INFO L225 Difference]: With dead ends: 55804 [2023-12-02 12:37:29,339 INFO L226 Difference]: Without dead ends: 35156 [2023-12-02 12:37:29,405 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 [2023-12-02 12:37:29,406 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 568 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-12-02 12:37:29,407 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] [2023-12-02 12:37:29,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35156 states. [2023-12-02 12:37:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35156 to 32883. [2023-12-02 12:37:31,292 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) [2023-12-02 12:37:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32883 states to 32883 states and 51835 transitions. [2023-12-02 12:37:31,390 INFO L78 Accepts]: Start accepts. Automaton has 32883 states and 51835 transitions. Word has length 61 [2023-12-02 12:37:31,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:31,391 INFO L495 AbstractCegarLoop]: Abstraction has 32883 states and 51835 transitions. [2023-12-02 12:37:31,391 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) [2023-12-02 12:37:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 32883 states and 51835 transitions. [2023-12-02 12:37:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 12:37:31,393 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:31,393 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] [2023-12-02 12:37:31,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 12:37:31,393 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:31,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:31,394 INFO L85 PathProgramCache]: Analyzing trace with hash 29338996, now seen corresponding path program 1 times [2023-12-02 12:37:31,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:31,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354871235] [2023-12-02 12:37:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:31,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:31,531 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 12:37:31,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:31,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354871235] [2023-12-02 12:37:31,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354871235] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:31,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:31,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:37:31,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579685617] [2023-12-02 12:37:31,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:31,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:37:31,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:31,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:37:31,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:37:31,534 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) [2023-12-02 12:37:33,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:33,935 INFO L93 Difference]: Finished difference Result 87477 states and 140329 transitions. [2023-12-02 12:37:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:37:33,936 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 [2023-12-02 12:37:33,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:34,128 INFO L225 Difference]: With dead ends: 87477 [2023-12-02 12:37:34,129 INFO L226 Difference]: Without dead ends: 54600 [2023-12-02 12:37:34,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:37:34,202 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 495 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:34,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 519 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:37:34,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54600 states. [2023-12-02 12:37:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54600 to 51534. [2023-12-02 12:37:36,620 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) [2023-12-02 12:37:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51534 states to 51534 states and 81433 transitions. [2023-12-02 12:37:36,771 INFO L78 Accepts]: Start accepts. Automaton has 51534 states and 81433 transitions. Word has length 63 [2023-12-02 12:37:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:36,772 INFO L495 AbstractCegarLoop]: Abstraction has 51534 states and 81433 transitions. [2023-12-02 12:37:36,772 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) [2023-12-02 12:37:36,772 INFO L276 IsEmpty]: Start isEmpty. Operand 51534 states and 81433 transitions. [2023-12-02 12:37:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 12:37:36,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:36,773 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] [2023-12-02 12:37:36,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 12:37:36,774 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:36,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:36,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1652007783, now seen corresponding path program 1 times [2023-12-02 12:37:36,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:36,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176300120] [2023-12-02 12:37:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:36,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:36,976 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 12:37:36,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:36,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176300120] [2023-12-02 12:37:36,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176300120] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:36,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:36,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:37:36,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627996752] [2023-12-02 12:37:36,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:36,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:37:36,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:36,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:37:36,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:37:36,979 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) [2023-12-02 12:37:40,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:40,907 INFO L93 Difference]: Finished difference Result 137846 states and 221916 transitions. [2023-12-02 12:37:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:37:40,908 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 [2023-12-02 12:37:40,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:41,136 INFO L225 Difference]: With dead ends: 137846 [2023-12-02 12:37:41,136 INFO L226 Difference]: Without dead ends: 86318 [2023-12-02 12:37:41,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:37:41,195 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 525 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:41,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 542 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:37:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86318 states. [2023-12-02 12:37:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86318 to 82180. [2023-12-02 12:37:45,168 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) [2023-12-02 12:37:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82180 states to 82180 states and 129963 transitions. [2023-12-02 12:37:45,533 INFO L78 Accepts]: Start accepts. Automaton has 82180 states and 129963 transitions. Word has length 65 [2023-12-02 12:37:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:45,534 INFO L495 AbstractCegarLoop]: Abstraction has 82180 states and 129963 transitions. [2023-12-02 12:37:45,534 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) [2023-12-02 12:37:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 82180 states and 129963 transitions. [2023-12-02 12:37:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 12:37:45,537 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:45,537 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] [2023-12-02 12:37:45,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:37:45,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:45,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:45,538 INFO L85 PathProgramCache]: Analyzing trace with hash 877780468, now seen corresponding path program 1 times [2023-12-02 12:37:45,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:37:45,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965492712] [2023-12-02 12:37:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:45,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:37:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:45,739 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 12:37:45,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:37:45,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965492712] [2023-12-02 12:37:45,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965492712] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:37:45,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:37:45,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:37:45,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548102867] [2023-12-02 12:37:45,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:37:45,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:37:45,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:37:45,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:37:45,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:37:45,742 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) [2023-12-02 12:37:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:52,827 INFO L93 Difference]: Finished difference Result 254691 states and 412047 transitions. [2023-12-02 12:37:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:37:52,827 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 67 [2023-12-02 12:37:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:53,478 INFO L225 Difference]: With dead ends: 254691 [2023-12-02 12:37:53,478 INFO L226 Difference]: Without dead ends: 172517 [2023-12-02 12:37:53,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:37:53,663 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 535 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:53,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 515 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:37:53,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172517 states. [2023-12-02 12:38:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172517 to 159435. [2023-12-02 12:38:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159435 states, 137150 states have (on average 1.4259278162595699) internal successors, (195566), 135870 states have internal predecessors, (195566), 13540 states have call successors, (13540), 7032 states have call predecessors, (13540), 8744 states have return successors, (39916), 16533 states have call predecessors, (39916), 13540 states have call successors, (39916) [2023-12-02 12:38:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159435 states to 159435 states and 249022 transitions. [2023-12-02 12:38:02,933 INFO L78 Accepts]: Start accepts. Automaton has 159435 states and 249022 transitions. Word has length 67 [2023-12-02 12:38:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:02,934 INFO L495 AbstractCegarLoop]: Abstraction has 159435 states and 249022 transitions. [2023-12-02 12:38:02,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-12-02 12:38:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand 159435 states and 249022 transitions. [2023-12-02 12:38:02,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 12:38:02,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:02,937 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 12:38:02,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 12:38:02,937 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:02,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:02,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2132190809, now seen corresponding path program 1 times [2023-12-02 12:38:02,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:02,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035750341] [2023-12-02 12:38:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:02,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:03,139 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 12:38:03,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:03,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035750341] [2023-12-02 12:38:03,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035750341] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:03,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:03,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:38:03,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222787175] [2023-12-02 12:38:03,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:03,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:38:03,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:38:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:38:03,141 INFO L87 Difference]: Start difference. First operand 159435 states and 249022 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2023-12-02 12:38:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:15,305 INFO L93 Difference]: Finished difference Result 427202 states and 680002 transitions. [2023-12-02 12:38:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:38:15,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 69 [2023-12-02 12:38:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:16,188 INFO L225 Difference]: With dead ends: 427202 [2023-12-02 12:38:16,188 INFO L226 Difference]: Without dead ends: 267773 [2023-12-02 12:38:16,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:38:16,391 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 519 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:16,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 522 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:38:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267773 states. [2023-12-02 12:38:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267773 to 258963. [2023-12-02 12:38:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258963 states, 222890 states have (on average 1.415505406254206) internal successors, (315502), 221532 states have internal predecessors, (315502), 22060 states have call successors, (22060), 11820 states have call predecessors, (22060), 14012 states have return successors, (66028), 25611 states have call predecessors, (66028), 22060 states have call successors, (66028) [2023-12-02 12:38:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258963 states to 258963 states and 403590 transitions. [2023-12-02 12:38:31,113 INFO L78 Accepts]: Start accepts. Automaton has 258963 states and 403590 transitions. Word has length 69 [2023-12-02 12:38:31,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:31,114 INFO L495 AbstractCegarLoop]: Abstraction has 258963 states and 403590 transitions. [2023-12-02 12:38:31,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2023-12-02 12:38:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 258963 states and 403590 transitions. [2023-12-02 12:38:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 12:38:31,117 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:31,117 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] [2023-12-02 12:38:31,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 12:38:31,117 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:38:31,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1046632052, now seen corresponding path program 1 times [2023-12-02 12:38:31,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:31,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011246144] [2023-12-02 12:38:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:31,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:31,301 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 12:38:31,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:31,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011246144] [2023-12-02 12:38:31,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011246144] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:31,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:31,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:38:31,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158857501] [2023-12-02 12:38:31,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:31,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:38:31,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:31,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:38:31,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:38:31,304 INFO L87 Difference]: Start difference. First operand 258963 states and 403590 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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) [2023-12-02 12:38:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:55,494 INFO L93 Difference]: Finished difference Result 783727 states and 1251428 transitions. [2023-12-02 12:38:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:38:55,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 71 [2023-12-02 12:38:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:57,571 INFO L225 Difference]: With dead ends: 783727 [2023-12-02 12:38:57,571 INFO L226 Difference]: Without dead ends: 524770 [2023-12-02 12:38:58,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:38:58,060 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 525 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:58,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 410 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:38:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524770 states. [2023-12-02 12:39:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524770 to 500980. [2023-12-02 12:39:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500980 states, 430443 states have (on average 1.4001458962046078) internal successors, (602683), 428548 states have internal predecessors, (602683), 42672 states have call successors, (42672), 23564 states have call predecessors, (42672), 27864 states have return successors, (123946), 48868 states have call predecessors, (123946), 42672 states have call successors, (123946) [2023-12-02 12:39:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500980 states to 500980 states and 769301 transitions. [2023-12-02 12:39:29,250 INFO L78 Accepts]: Start accepts. Automaton has 500980 states and 769301 transitions. Word has length 71 [2023-12-02 12:39:29,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:29,250 INFO L495 AbstractCegarLoop]: Abstraction has 500980 states and 769301 transitions. [2023-12-02 12:39:29,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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) [2023-12-02 12:39:29,251 INFO L276 IsEmpty]: Start isEmpty. Operand 500980 states and 769301 transitions. [2023-12-02 12:39:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 12:39:29,253 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:29,253 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 12:39:29,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 12:39:29,254 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:39:29,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:29,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1536260071, now seen corresponding path program 1 times [2023-12-02 12:39:29,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:29,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434721280] [2023-12-02 12:39:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:29,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:29,294 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 12:39:29,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:29,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434721280] [2023-12-02 12:39:29,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434721280] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:39:29,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:39:29,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:39:29,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932227586] [2023-12-02 12:39:29,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:39:29,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:39:29,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:29,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:39:29,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:39:29,296 INFO L87 Difference]: Start difference. First operand 500980 states and 769301 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5)