./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.08.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.08.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d0fbb3eaba725aed5c3b8bf09c66f0f1daed4feeee0b9a3792dc033de334e501 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:29:39,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:29:39,105 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:29:39,111 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:29:39,111 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:29:39,137 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:29:39,138 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:29:39,138 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:29:39,139 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:29:39,140 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:29:39,140 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:29:39,141 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:29:39,141 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:29:39,142 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:29:39,142 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:29:39,143 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:29:39,143 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:29:39,144 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:29:39,144 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:29:39,145 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:29:39,145 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:29:39,146 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:29:39,147 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:29:39,147 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:29:39,147 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:29:39,148 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:29:39,148 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:29:39,149 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:29:39,149 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:29:39,149 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:29:39,150 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:29:39,150 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:29:39,150 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:29:39,151 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:29:39,151 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:29:39,151 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:29:39,152 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:29:39,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:29:39,152 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:29:39,152 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:29:39,153 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:29:39,153 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:29:39,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:29:39,153 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:29:39,154 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:29:39,154 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:29:39,154 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:29:39,154 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_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0fbb3eaba725aed5c3b8bf09c66f0f1daed4feeee0b9a3792dc033de334e501 [2023-11-23 21:29:39,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:29:39,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:29:39,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:29:39,540 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:29:39,541 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:29:39,543 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/systemc/transmitter.08.cil.c [2023-11-23 21:29:42,853 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:29:43,140 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:29:43,141 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/sv-benchmarks/c/systemc/transmitter.08.cil.c [2023-11-23 21:29:43,159 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/data/3bd1ba563/db494a403cf34095a4b3143bf189d279/FLAG7fd7dbfeb [2023-11-23 21:29:43,186 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/data/3bd1ba563/db494a403cf34095a4b3143bf189d279 [2023-11-23 21:29:43,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:29:43,196 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:29:43,197 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:29:43,197 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:29:43,205 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:29:43,205 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,207 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d807dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43, skipping insertion in model container [2023-11-23 21:29:43,207 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,259 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:29:43,421 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_1bf1120f-3042-421d-8229-bca725d78665/sv-benchmarks/c/systemc/transmitter.08.cil.c[706,719] [2023-11-23 21:29:43,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:29:43,556 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:29:43,568 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_1bf1120f-3042-421d-8229-bca725d78665/sv-benchmarks/c/systemc/transmitter.08.cil.c[706,719] [2023-11-23 21:29:43,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:29:43,656 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:29:43,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43 WrapperNode [2023-11-23 21:29:43,657 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:29:43,659 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:29:43,659 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:29:43,659 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:29:43,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,679 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,727 INFO L138 Inliner]: procedures = 44, calls = 54, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 623 [2023-11-23 21:29:43,727 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:29:43,728 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:29:43,728 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:29:43,728 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:29:43,738 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,742 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,743 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,756 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,782 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,785 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,795 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,801 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:29:43,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:29:43,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:29:43,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:29:43,816 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43" (1/1) ... [2023-11-23 21:29:43,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:29:43,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:43,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:29:43,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf1120f-3042-421d-8229-bca725d78665/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:29:43,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:29:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 21:29:43,914 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 21:29:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 21:29:43,916 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 21:29:43,916 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:29:43,917 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:29:43,917 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 21:29:43,917 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 21:29:43,917 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 21:29:43,917 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 21:29:43,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:29:43,917 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 21:29:43,917 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 21:29:43,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:29:43,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:29:44,074 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:29:44,076 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:29:44,853 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:29:45,330 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:29:45,330 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-23 21:29:45,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:45 BoogieIcfgContainer [2023-11-23 21:29:45,333 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:29:45,338 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:29:45,338 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:29:45,341 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:29:45,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:29:43" (1/3) ... [2023-11-23 21:29:45,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d23d72a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:29:45, skipping insertion in model container [2023-11-23 21:29:45,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:43" (2/3) ... [2023-11-23 21:29:45,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d23d72a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:29:45, skipping insertion in model container [2023-11-23 21:29:45,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:45" (3/3) ... [2023-11-23 21:29:45,347 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.08.cil.c [2023-11-23 21:29:45,369 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:29:45,369 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:29:45,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:29:45,447 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;@e0643e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:29:45,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:29:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 151 states, 122 states have (on average 1.5081967213114753) internal successors, (184), 124 states have internal predecessors, (184), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-23 21:29:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 21:29:45,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:45,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:45,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:45,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:45,484 INFO L85 PathProgramCache]: Analyzing trace with hash -621327723, now seen corresponding path program 1 times [2023-11-23 21:29:45,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:45,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761867437] [2023-11-23 21:29:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:45,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:46,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:46,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761867437] [2023-11-23 21:29:46,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761867437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:46,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:46,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:29:46,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894831999] [2023-11-23 21:29:46,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:46,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:29:46,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:29:46,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:29:46,167 INFO L87 Difference]: Start difference. First operand has 151 states, 122 states have (on average 1.5081967213114753) internal successors, (184), 124 states have internal predecessors, (184), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:46,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:46,777 INFO L93 Difference]: Finished difference Result 440 states and 669 transitions. [2023-11-23 21:29:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:29:46,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 61 [2023-11-23 21:29:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:46,792 INFO L225 Difference]: With dead ends: 440 [2023-11-23 21:29:46,792 INFO L226 Difference]: Without dead ends: 290 [2023-11-23 21:29:46,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:29:46,801 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 393 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:46,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 614 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:29:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-23 21:29:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 286. [2023-11-23 21:29:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 235 states have (on average 1.4595744680851064) internal successors, (343), 237 states have internal predecessors, (343), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-23 21:29:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 419 transitions. [2023-11-23 21:29:46,884 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 419 transitions. Word has length 61 [2023-11-23 21:29:46,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:46,885 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 419 transitions. [2023-11-23 21:29:46,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 419 transitions. [2023-11-23 21:29:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 21:29:46,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:46,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:46,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:29:46,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:46,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1572798358, now seen corresponding path program 1 times [2023-11-23 21:29:46,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:46,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594470625] [2023-11-23 21:29:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:46,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:47,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:47,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594470625] [2023-11-23 21:29:47,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594470625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:47,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:47,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:29:47,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914662214] [2023-11-23 21:29:47,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:47,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:29:47,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:47,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:29:47,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:29:47,134 INFO L87 Difference]: Start difference. First operand 286 states and 419 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:47,943 INFO L93 Difference]: Finished difference Result 1657 states and 2551 transitions. [2023-11-23 21:29:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:29:47,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2023-11-23 21:29:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:47,959 INFO L225 Difference]: With dead ends: 1657 [2023-11-23 21:29:47,959 INFO L226 Difference]: Without dead ends: 1376 [2023-11-23 21:29:47,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:29:47,964 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 985 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:47,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 771 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:29:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2023-11-23 21:29:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1340. [2023-11-23 21:29:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1117 states have (on average 1.4529991047448523) internal successors, (1623), 1125 states have internal predecessors, (1623), 162 states have call successors, (162), 60 states have call predecessors, (162), 60 states have return successors, (244), 155 states have call predecessors, (244), 162 states have call successors, (244) [2023-11-23 21:29:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2029 transitions. [2023-11-23 21:29:48,100 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2029 transitions. Word has length 61 [2023-11-23 21:29:48,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:48,101 INFO L495 AbstractCegarLoop]: Abstraction has 1340 states and 2029 transitions. [2023-11-23 21:29:48,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:48,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2029 transitions. [2023-11-23 21:29:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 21:29:48,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:48,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:48,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:29:48,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:48,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:48,106 INFO L85 PathProgramCache]: Analyzing trace with hash 699320663, now seen corresponding path program 1 times [2023-11-23 21:29:48,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:48,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984592275] [2023-11-23 21:29:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:48,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:48,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:48,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984592275] [2023-11-23 21:29:48,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984592275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:48,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:48,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:29:48,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28239067] [2023-11-23 21:29:48,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:48,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:29:48,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:48,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:29:48,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:29:48,333 INFO L87 Difference]: Start difference. First operand 1340 states and 2029 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:49,202 INFO L93 Difference]: Finished difference Result 5283 states and 8225 transitions. [2023-11-23 21:29:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:29:49,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2023-11-23 21:29:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:49,241 INFO L225 Difference]: With dead ends: 5283 [2023-11-23 21:29:49,242 INFO L226 Difference]: Without dead ends: 3948 [2023-11-23 21:29:49,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:29:49,251 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 986 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:49,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 771 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:29:49,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2023-11-23 21:29:49,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3686. [2023-11-23 21:29:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3686 states, 3145 states have (on average 1.4623211446740858) internal successors, (4599), 3119 states have internal predecessors, (4599), 376 states have call successors, (376), 148 states have call predecessors, (376), 164 states have return successors, (726), 419 states have call predecessors, (726), 376 states have call successors, (726) [2023-11-23 21:29:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 5701 transitions. [2023-11-23 21:29:49,593 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 5701 transitions. Word has length 61 [2023-11-23 21:29:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:49,593 INFO L495 AbstractCegarLoop]: Abstraction has 3686 states and 5701 transitions. [2023-11-23 21:29:49,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 5701 transitions. [2023-11-23 21:29:49,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 21:29:49,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:49,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:49,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:29:49,602 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:49,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:49,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1456193738, now seen corresponding path program 1 times [2023-11-23 21:29:49,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:49,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42056552] [2023-11-23 21:29:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:49,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:49,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:49,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42056552] [2023-11-23 21:29:49,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42056552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:49,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:49,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:29:49,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482895227] [2023-11-23 21:29:49,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:49,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:29:49,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:49,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:29:49,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:29:49,776 INFO L87 Difference]: Start difference. First operand 3686 states and 5701 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:50,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:50,822 INFO L93 Difference]: Finished difference Result 13591 states and 21727 transitions. [2023-11-23 21:29:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:29:50,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2023-11-23 21:29:50,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:50,935 INFO L225 Difference]: With dead ends: 13591 [2023-11-23 21:29:50,935 INFO L226 Difference]: Without dead ends: 9910 [2023-11-23 21:29:50,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:29:50,965 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 955 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:50,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 826 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:29:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9910 states. [2023-11-23 21:29:51,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9910 to 9322. [2023-11-23 21:29:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9322 states, 8055 states have (on average 1.4702669149596523) internal successors, (11843), 7919 states have internal predecessors, (11843), 846 states have call successors, (846), 348 states have call predecessors, (846), 420 states have return successors, (2042), 1055 states have call predecessors, (2042), 846 states have call successors, (2042) [2023-11-23 21:29:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9322 states to 9322 states and 14731 transitions. [2023-11-23 21:29:51,695 INFO L78 Accepts]: Start accepts. Automaton has 9322 states and 14731 transitions. Word has length 61 [2023-11-23 21:29:51,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:51,696 INFO L495 AbstractCegarLoop]: Abstraction has 9322 states and 14731 transitions. [2023-11-23 21:29:51,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 9322 states and 14731 transitions. [2023-11-23 21:29:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 21:29:51,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:51,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:51,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:29:51,699 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:51,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:51,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1073956949, now seen corresponding path program 1 times [2023-11-23 21:29:51,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:51,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260801979] [2023-11-23 21:29:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:51,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:51,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:51,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260801979] [2023-11-23 21:29:51,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260801979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:51,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:51,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:29:51,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965211530] [2023-11-23 21:29:51,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:51,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:29:51,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:51,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:29:51,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:29:51,810 INFO L87 Difference]: Start difference. First operand 9322 states and 14731 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:53,544 INFO L93 Difference]: Finished difference Result 33687 states and 55445 transitions. [2023-11-23 21:29:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:29:53,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2023-11-23 21:29:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:53,802 INFO L225 Difference]: With dead ends: 33687 [2023-11-23 21:29:53,802 INFO L226 Difference]: Without dead ends: 24370 [2023-11-23 21:29:53,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:29:53,851 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 928 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:53,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 857 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:29:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24370 states. [2023-11-23 21:29:55,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24370 to 23126. [2023-11-23 21:29:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23126 states, 20133 states have (on average 1.4789152138280435) internal successors, (29775), 19667 states have internal predecessors, (29775), 1916 states have call successors, (1916), 820 states have call predecessors, (1916), 1076 states have return successors, (5710), 2639 states have call predecessors, (5710), 1916 states have call successors, (5710) [2023-11-23 21:29:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23126 states to 23126 states and 37401 transitions. [2023-11-23 21:29:55,894 INFO L78 Accepts]: Start accepts. Automaton has 23126 states and 37401 transitions. Word has length 61 [2023-11-23 21:29:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:55,895 INFO L495 AbstractCegarLoop]: Abstraction has 23126 states and 37401 transitions. [2023-11-23 21:29:55,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 23126 states and 37401 transitions. [2023-11-23 21:29:55,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 21:29:55,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:55,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:55,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:29:55,898 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:55,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:55,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1016812724, now seen corresponding path program 1 times [2023-11-23 21:29:55,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:55,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170421306] [2023-11-23 21:29:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:55,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:56,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:56,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170421306] [2023-11-23 21:29:56,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170421306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:56,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:56,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:29:56,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485827456] [2023-11-23 21:29:56,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:56,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:29:56,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:56,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:29:56,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:29:56,134 INFO L87 Difference]: Start difference. First operand 23126 states and 37401 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:29:58,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:58,386 INFO L93 Difference]: Finished difference Result 62872 states and 102219 transitions. [2023-11-23 21:29:58,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:29:58,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-11-23 21:29:58,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:58,637 INFO L225 Difference]: With dead ends: 62872 [2023-11-23 21:29:58,637 INFO L226 Difference]: Without dead ends: 39752 [2023-11-23 21:29:58,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:29:58,717 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 633 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:58,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 505 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:29:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39752 states. [2023-11-23 21:30:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39752 to 37035. [2023-11-23 21:30:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37035 states, 32326 states have (on average 1.466095403081111) internal successors, (47393), 31699 states have internal predecessors, (47393), 2872 states have call successors, (2872), 1324 states have call predecessors, (2872), 1836 states have return successors, (8563), 4012 states have call predecessors, (8563), 2872 states have call successors, (8563) [2023-11-23 21:30:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37035 states to 37035 states and 58828 transitions. [2023-11-23 21:30:01,671 INFO L78 Accepts]: Start accepts. Automaton has 37035 states and 58828 transitions. Word has length 61 [2023-11-23 21:30:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:01,673 INFO L495 AbstractCegarLoop]: Abstraction has 37035 states and 58828 transitions. [2023-11-23 21:30:01,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:30:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 37035 states and 58828 transitions. [2023-11-23 21:30:01,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 21:30:01,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:01,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:01,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:30:01,676 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:01,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:01,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1428256926, now seen corresponding path program 1 times [2023-11-23 21:30:01,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:01,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710108958] [2023-11-23 21:30:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:01,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:02,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:02,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710108958] [2023-11-23 21:30:02,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710108958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:02,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:02,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:30:02,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792547982] [2023-11-23 21:30:02,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:02,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:30:02,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:30:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:30:02,181 INFO L87 Difference]: Start difference. First operand 37035 states and 58828 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:30:05,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:05,564 INFO L93 Difference]: Finished difference Result 110646 states and 176500 transitions. [2023-11-23 21:30:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:30:05,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2023-11-23 21:30:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:06,026 INFO L225 Difference]: With dead ends: 110646 [2023-11-23 21:30:06,026 INFO L226 Difference]: Without dead ends: 73617 [2023-11-23 21:30:06,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:30:06,276 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 582 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:06,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 673 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:30:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73617 states. [2023-11-23 21:30:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73617 to 67307. [2023-11-23 21:30:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67307 states, 58858 states have (on average 1.464881579394475) internal successors, (86220), 57547 states have internal predecessors, (86220), 5068 states have call successors, (5068), 2348 states have call predecessors, (5068), 3380 states have return successors, (16036), 7412 states have call predecessors, (16036), 5068 states have call successors, (16036) [2023-11-23 21:30:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67307 states to 67307 states and 107324 transitions. [2023-11-23 21:30:10,779 INFO L78 Accepts]: Start accepts. Automaton has 67307 states and 107324 transitions. Word has length 63 [2023-11-23 21:30:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:10,779 INFO L495 AbstractCegarLoop]: Abstraction has 67307 states and 107324 transitions. [2023-11-23 21:30:10,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:30:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 67307 states and 107324 transitions. [2023-11-23 21:30:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 21:30:10,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:10,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:10,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:30:10,783 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:10,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:10,783 INFO L85 PathProgramCache]: Analyzing trace with hash 137914535, now seen corresponding path program 1 times [2023-11-23 21:30:10,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:10,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375112482] [2023-11-23 21:30:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:10,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:11,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:11,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375112482] [2023-11-23 21:30:11,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375112482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:11,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:11,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:30:11,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679689274] [2023-11-23 21:30:11,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:11,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:30:11,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:11,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:30:11,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:30:11,057 INFO L87 Difference]: Start difference. First operand 67307 states and 107324 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:30:16,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:16,518 INFO L93 Difference]: Finished difference Result 179733 states and 291789 transitions. [2023-11-23 21:30:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:30:16,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2023-11-23 21:30:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:17,081 INFO L225 Difference]: With dead ends: 179733 [2023-11-23 21:30:17,081 INFO L226 Difference]: Without dead ends: 112432 [2023-11-23 21:30:17,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:30:17,202 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 589 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:17,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 508 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:30:17,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112432 states. [2023-11-23 21:30:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112432 to 106262. [2023-11-23 21:30:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106262 states, 93040 states have (on average 1.4625967325881342) internal successors, (136080), 91499 states have internal predecessors, (136080), 8053 states have call successors, (8053), 3832 states have call predecessors, (8053), 5168 states have return successors, (25846), 10931 states have call predecessors, (25846), 8053 states have call successors, (25846) [2023-11-23 21:30:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106262 states to 106262 states and 169979 transitions. [2023-11-23 21:30:24,704 INFO L78 Accepts]: Start accepts. Automaton has 106262 states and 169979 transitions. Word has length 65 [2023-11-23 21:30:24,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:24,705 INFO L495 AbstractCegarLoop]: Abstraction has 106262 states and 169979 transitions. [2023-11-23 21:30:24,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:30:24,706 INFO L276 IsEmpty]: Start isEmpty. Operand 106262 states and 169979 transitions. [2023-11-23 21:30:24,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 21:30:24,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:24,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:24,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:30:24,708 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:24,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash -390334996, now seen corresponding path program 1 times [2023-11-23 21:30:24,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:24,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812860579] [2023-11-23 21:30:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:24,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:24,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812860579] [2023-11-23 21:30:24,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812860579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:24,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:24,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:30:24,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298434699] [2023-11-23 21:30:24,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:24,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:30:24,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:24,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:30:24,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:30:24,944 INFO L87 Difference]: Start difference. First operand 106262 states and 169979 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)