./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ --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 4edad7c083448b81b05575191757512095bfff0f094103ddb1a592d0cd702494 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:19:39,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:19:39,856 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:19:39,863 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:19:39,864 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:19:39,904 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:19:39,904 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:19:39,905 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:19:39,906 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:19:39,912 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:19:39,912 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:19:39,914 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:19:39,914 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:19:39,916 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:19:39,917 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:19:39,917 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:19:39,918 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:19:39,918 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:19:39,919 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:19:39,919 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:19:39,920 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:19:39,921 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:19:39,922 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:19:39,922 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:19:39,923 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:19:39,923 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:19:39,924 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:19:39,924 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:19:39,925 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:19:39,925 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:19:39,926 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:19:39,927 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:19:39,927 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:19:39,927 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:19:39,928 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:19:39,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:19:39,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:19:39,939 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:19:39,940 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:19:39,940 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:19:39,940 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:19:39,940 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:19:39,941 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:19:39,941 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:19:39,941 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:19:39,942 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_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4edad7c083448b81b05575191757512095bfff0f094103ddb1a592d0cd702494 [2023-11-19 05:19:40,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:19:40,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:19:40,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:19:40,312 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:19:40,328 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:19:40,329 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/systemc/transmitter.03.cil.c [2023-11-19 05:19:43,303 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:19:43,552 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:19:43,553 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/sv-benchmarks/c/systemc/transmitter.03.cil.c [2023-11-19 05:19:43,569 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/data/ea2e7eb42/47c429b040874d138103278476ef2af8/FLAGad8cee7a8 [2023-11-19 05:19:43,588 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/data/ea2e7eb42/47c429b040874d138103278476ef2af8 [2023-11-19 05:19:43,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:19:43,595 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:19:43,599 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:19:43,599 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:19:43,605 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:19:43,643 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:19:43" (1/1) ... [2023-11-19 05:19:43,645 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a47c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:43, skipping insertion in model container [2023-11-19 05:19:43,645 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:19:43" (1/1) ... [2023-11-19 05:19:43,715 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:19:43,892 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_bcd16d05-455c-41f8-b6e4-0348ac782fb8/sv-benchmarks/c/systemc/transmitter.03.cil.c[706,719] [2023-11-19 05:19:43,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:19:43,973 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:19:43,986 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_bcd16d05-455c-41f8-b6e4-0348ac782fb8/sv-benchmarks/c/systemc/transmitter.03.cil.c[706,719] [2023-11-19 05:19:44,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:19:44,040 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:19:44,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44 WrapperNode [2023-11-19 05:19:44,041 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:19:44,042 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:19:44,042 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:19:44,042 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:19:44,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,060 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,089 INFO L138 Inliner]: procedures = 34, calls = 39, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 328 [2023-11-19 05:19:44,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:19:44,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:19:44,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:19:44,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:19:44,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,103 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,104 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,117 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,133 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,135 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,139 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:19:44,140 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:19:44,140 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:19:44,140 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:19:44,141 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:19:44,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:44,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:19:44,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:19:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:19:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:19:44,238 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:19:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:19:44,238 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:19:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:19:44,239 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:19:44,239 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:19:44,239 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:19:44,239 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:19:44,239 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:19:44,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:19:44,240 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:19:44,240 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:19:44,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:19:44,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:19:44,327 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:19:44,329 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:19:44,854 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:19:45,050 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:19:45,050 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-19 05:19:45,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:19:45 BoogieIcfgContainer [2023-11-19 05:19:45,056 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:19:45,058 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:19:45,058 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:19:45,061 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:19:45,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:19:43" (1/3) ... [2023-11-19 05:19:45,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53accb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:19:45, skipping insertion in model container [2023-11-19 05:19:45,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (2/3) ... [2023-11-19 05:19:45,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53accb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:19:45, skipping insertion in model container [2023-11-19 05:19:45,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:19:45" (3/3) ... [2023-11-19 05:19:45,064 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.03.cil.c [2023-11-19 05:19:45,084 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:19:45,084 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:19:45,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:19:45,144 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;@6bb16e62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:19:45,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:19:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 69 states have internal predecessors, (99), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 05:19:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 05:19:45,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:45,160 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] [2023-11-19 05:19:45,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:45,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:45,166 INFO L85 PathProgramCache]: Analyzing trace with hash 797827486, now seen corresponding path program 1 times [2023-11-19 05:19:45,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:45,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776913056] [2023-11-19 05:19:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:45,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:45,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776913056] [2023-11-19 05:19:45,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776913056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:45,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:45,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:19:45,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055731210] [2023-11-19 05:19:45,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:45,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:19:45,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:45,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:19:45,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:19:45,676 INFO L87 Difference]: Start difference. First operand has 91 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 69 states have internal predecessors, (99), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2023-11-19 05:19:46,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:46,086 INFO L93 Difference]: Finished difference Result 260 states and 379 transitions. [2023-11-19 05:19:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:19:46,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 41 [2023-11-19 05:19:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:46,128 INFO L225 Difference]: With dead ends: 260 [2023-11-19 05:19:46,129 INFO L226 Difference]: Without dead ends: 170 [2023-11-19 05:19:46,135 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 [2023-11-19 05:19:46,140 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 218 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:46,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 314 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:19:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-19 05:19:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2023-11-19 05:19:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 125 states have (on average 1.384) internal successors, (173), 127 states have internal predecessors, (173), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 05:19:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 229 transitions. [2023-11-19 05:19:46,217 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 229 transitions. Word has length 41 [2023-11-19 05:19:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:46,218 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 229 transitions. [2023-11-19 05:19:46,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2023-11-19 05:19:46,218 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 229 transitions. [2023-11-19 05:19:46,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 05:19:46,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:46,221 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] [2023-11-19 05:19:46,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:19:46,222 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:46,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:46,223 INFO L85 PathProgramCache]: Analyzing trace with hash -973643489, now seen corresponding path program 1 times [2023-11-19 05:19:46,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:46,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220575526] [2023-11-19 05:19:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:46,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:46,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:46,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220575526] [2023-11-19 05:19:46,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220575526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:46,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:46,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:19:46,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688096865] [2023-11-19 05:19:46,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:46,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:19:46,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:46,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:19:46,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:19:46,370 INFO L87 Difference]: Start difference. First operand 166 states and 229 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2023-11-19 05:19:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:46,827 INFO L93 Difference]: Finished difference Result 937 states and 1341 transitions. [2023-11-19 05:19:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:19:46,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 41 [2023-11-19 05:19:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:46,838 INFO L225 Difference]: With dead ends: 937 [2023-11-19 05:19:46,838 INFO L226 Difference]: Without dead ends: 776 [2023-11-19 05:19:46,841 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 [2023-11-19 05:19:46,842 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 484 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:46,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 413 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:19:46,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2023-11-19 05:19:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 740. [2023-11-19 05:19:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 567 states have (on average 1.36331569664903) internal successors, (773), 575 states have internal predecessors, (773), 112 states have call successors, (112), 60 states have call predecessors, (112), 60 states have return successors, (154), 105 states have call predecessors, (154), 112 states have call successors, (154) [2023-11-19 05:19:46,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1039 transitions. [2023-11-19 05:19:46,955 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1039 transitions. Word has length 41 [2023-11-19 05:19:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:46,955 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1039 transitions. [2023-11-19 05:19:46,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2023-11-19 05:19:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1039 transitions. [2023-11-19 05:19:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 05:19:46,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:46,957 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] [2023-11-19 05:19:46,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:19:46,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:46,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:46,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1263719776, now seen corresponding path program 1 times [2023-11-19 05:19:46,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:46,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128863602] [2023-11-19 05:19:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:46,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:47,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:47,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128863602] [2023-11-19 05:19:47,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128863602] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:47,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:47,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:19:47,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684288323] [2023-11-19 05:19:47,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:47,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:19:47,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:19:47,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:19:47,089 INFO L87 Difference]: Start difference. First operand 740 states and 1039 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2023-11-19 05:19:47,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:47,632 INFO L93 Difference]: Finished difference Result 2905 states and 4198 transitions. [2023-11-19 05:19:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:19:47,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 41 [2023-11-19 05:19:47,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:47,659 INFO L225 Difference]: With dead ends: 2905 [2023-11-19 05:19:47,664 INFO L226 Difference]: Without dead ends: 2170 [2023-11-19 05:19:47,674 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 [2023-11-19 05:19:47,677 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 475 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:47,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 425 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:19:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2023-11-19 05:19:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1942. [2023-11-19 05:19:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1501 states have (on average 1.3610926049300467) internal successors, (2043), 1507 states have internal predecessors, (2043), 276 states have call successors, (276), 148 states have call predecessors, (276), 164 states have return successors, (464), 287 states have call predecessors, (464), 276 states have call successors, (464) [2023-11-19 05:19:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 2783 transitions. [2023-11-19 05:19:47,921 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 2783 transitions. Word has length 41 [2023-11-19 05:19:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:47,922 INFO L495 AbstractCegarLoop]: Abstraction has 1942 states and 2783 transitions. [2023-11-19 05:19:47,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2023-11-19 05:19:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 2783 transitions. [2023-11-19 05:19:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:19:47,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:47,925 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] [2023-11-19 05:19:47,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:19:47,925 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:47,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash -226278743, now seen corresponding path program 1 times [2023-11-19 05:19:47,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:47,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885874863] [2023-11-19 05:19:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:47,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:48,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:48,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885874863] [2023-11-19 05:19:48,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885874863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:48,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:48,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:19:48,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042565671] [2023-11-19 05:19:48,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:48,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:19:48,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:48,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:19:48,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:19:48,229 INFO L87 Difference]: Start difference. First operand 1942 states and 2783 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2023-11-19 05:19:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:48,753 INFO L93 Difference]: Finished difference Result 5184 states and 7429 transitions. [2023-11-19 05:19:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:19:48,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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 45 [2023-11-19 05:19:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:48,776 INFO L225 Difference]: With dead ends: 5184 [2023-11-19 05:19:48,777 INFO L226 Difference]: Without dead ends: 3248 [2023-11-19 05:19:48,786 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 [2023-11-19 05:19:48,796 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 302 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:48,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 261 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:19:48,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2023-11-19 05:19:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 3035. [2023-11-19 05:19:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3035 states, 2362 states have (on average 1.342506350550381) internal successors, (3171), 2371 states have internal predecessors, (3171), 406 states have call successors, (406), 238 states have call predecessors, (406), 266 states have return successors, (676), 426 states have call predecessors, (676), 406 states have call successors, (676) [2023-11-19 05:19:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 4253 transitions. [2023-11-19 05:19:49,141 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 4253 transitions. Word has length 45 [2023-11-19 05:19:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:49,141 INFO L495 AbstractCegarLoop]: Abstraction has 3035 states and 4253 transitions. [2023-11-19 05:19:49,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2023-11-19 05:19:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 4253 transitions. [2023-11-19 05:19:49,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:19:49,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:49,144 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] [2023-11-19 05:19:49,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:19:49,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:49,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:49,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1661162437, now seen corresponding path program 1 times [2023-11-19 05:19:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:49,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372002461] [2023-11-19 05:19:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:49,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:49,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:49,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372002461] [2023-11-19 05:19:49,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372002461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:49,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:49,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:19:49,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728018996] [2023-11-19 05:19:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:49,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:19:49,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:19:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:49,207 INFO L87 Difference]: Start difference. First operand 3035 states and 4253 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2023-11-19 05:19:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:49,596 INFO L93 Difference]: Finished difference Result 5871 states and 8353 transitions. [2023-11-19 05:19:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:19:49,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) Word has length 47 [2023-11-19 05:19:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:49,629 INFO L225 Difference]: With dead ends: 5871 [2023-11-19 05:19:49,629 INFO L226 Difference]: Without dead ends: 3867 [2023-11-19 05:19:49,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:49,638 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 94 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:49,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 192 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:19:49,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2023-11-19 05:19:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3211. [2023-11-19 05:19:49,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 2472 states have (on average 1.311084142394822) internal successors, (3241), 2504 states have internal predecessors, (3241), 450 states have call successors, (450), 270 states have call predecessors, (450), 288 states have return successors, (644), 437 states have call predecessors, (644), 450 states have call successors, (644) [2023-11-19 05:19:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 4335 transitions. [2023-11-19 05:19:49,960 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 4335 transitions. Word has length 47 [2023-11-19 05:19:49,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:49,962 INFO L495 AbstractCegarLoop]: Abstraction has 3211 states and 4335 transitions. [2023-11-19 05:19:49,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2023-11-19 05:19:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 4335 transitions. [2023-11-19 05:19:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 05:19:49,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:49,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:49,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:19:49,968 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:49,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:49,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1397103097, now seen corresponding path program 1 times [2023-11-19 05:19:49,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:49,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551686628] [2023-11-19 05:19:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:49,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:19:50,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:50,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551686628] [2023-11-19 05:19:50,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551686628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:50,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:50,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:19:50,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603259056] [2023-11-19 05:19:50,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:50,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:19:50,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:50,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:19:50,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:19:50,166 INFO L87 Difference]: Start difference. First operand 3211 states and 4335 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 05:19:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:50,854 INFO L93 Difference]: Finished difference Result 9135 states and 12328 transitions. [2023-11-19 05:19:50,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:19:50,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2023-11-19 05:19:50,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:50,903 INFO L225 Difference]: With dead ends: 9135 [2023-11-19 05:19:50,903 INFO L226 Difference]: Without dead ends: 5930 [2023-11-19 05:19:50,915 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 [2023-11-19 05:19:50,916 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 279 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:50,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 295 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:19:50,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5930 states. [2023-11-19 05:19:51,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5930 to 5620. [2023-11-19 05:19:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5620 states, 4315 states have (on average 1.2977983777520279) internal successors, (5600), 4366 states have internal predecessors, (5600), 788 states have call successors, (788), 480 states have call predecessors, (788), 516 states have return successors, (1142), 774 states have call predecessors, (1142), 788 states have call successors, (1142) [2023-11-19 05:19:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5620 states to 5620 states and 7530 transitions. [2023-11-19 05:19:51,532 INFO L78 Accepts]: Start accepts. Automaton has 5620 states and 7530 transitions. Word has length 59 [2023-11-19 05:19:51,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:51,533 INFO L495 AbstractCegarLoop]: Abstraction has 5620 states and 7530 transitions. [2023-11-19 05:19:51,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 05:19:51,533 INFO L276 IsEmpty]: Start isEmpty. Operand 5620 states and 7530 transitions. [2023-11-19 05:19:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 05:19:51,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:51,536 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:51,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:19:51,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:51,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:51,537 INFO L85 PathProgramCache]: Analyzing trace with hash -323368207, now seen corresponding path program 1 times [2023-11-19 05:19:51,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:51,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251850310] [2023-11-19 05:19:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:51,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:19:51,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:51,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251850310] [2023-11-19 05:19:51,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251850310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:51,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:51,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:19:51,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396919296] [2023-11-19 05:19:51,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:51,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:19:51,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:51,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:19:51,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:19:51,704 INFO L87 Difference]: Start difference. First operand 5620 states and 7530 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 05:19:52,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:52,708 INFO L93 Difference]: Finished difference Result 15076 states and 20088 transitions. [2023-11-19 05:19:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:19:52,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2023-11-19 05:19:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:52,787 INFO L225 Difference]: With dead ends: 15076 [2023-11-19 05:19:52,787 INFO L226 Difference]: Without dead ends: 9462 [2023-11-19 05:19:52,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:19:52,808 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 337 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:52,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 219 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:19:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9462 states. [2023-11-19 05:19:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9462 to 9444. [2023-11-19 05:19:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9444 states, 7240 states have (on average 1.2776243093922652) internal successors, (9250), 7313 states have internal predecessors, (9250), 1335 states have call successors, (1335), 828 states have call predecessors, (1335), 868 states have return successors, (1891), 1303 states have call predecessors, (1891), 1335 states have call successors, (1891) [2023-11-19 05:19:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9444 states to 9444 states and 12476 transitions. [2023-11-19 05:19:53,893 INFO L78 Accepts]: Start accepts. Automaton has 9444 states and 12476 transitions. Word has length 63 [2023-11-19 05:19:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:53,894 INFO L495 AbstractCegarLoop]: Abstraction has 9444 states and 12476 transitions. [2023-11-19 05:19:53,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 05:19:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 9444 states and 12476 transitions. [2023-11-19 05:19:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 05:19:53,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:53,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:53,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:19:53,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:53,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:53,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1548781915, now seen corresponding path program 1 times [2023-11-19 05:19:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:53,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744388221] [2023-11-19 05:19:53,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:53,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:19:53,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:53,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744388221] [2023-11-19 05:19:53,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744388221] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:19:53,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717546689] [2023-11-19 05:19:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:53,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:53,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:53,989 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:19:54,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:19:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:54,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:19:54,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:19:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:54,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:19:54,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717546689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:54,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:19:54,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:19:54,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236174053] [2023-11-19 05:19:54,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:54,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:19:54,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:54,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:19:54,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:19:54,197 INFO L87 Difference]: Start difference. First operand 9444 states and 12476 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:19:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:55,223 INFO L93 Difference]: Finished difference Result 15200 states and 20380 transitions. [2023-11-19 05:19:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:19:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2023-11-19 05:19:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:55,280 INFO L225 Difference]: With dead ends: 15200 [2023-11-19 05:19:55,281 INFO L226 Difference]: Without dead ends: 11836 [2023-11-19 05:19:55,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:19:55,295 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 66 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:55,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 276 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:19:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11836 states. [2023-11-19 05:19:56,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11836 to 10296. [2023-11-19 05:19:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10296 states, 8002 states have (on average 1.2838040489877531) internal successors, (10273), 8075 states have internal predecessors, (10273), 1380 states have call successors, (1380), 873 states have call predecessors, (1380), 913 states have return successors, (1936), 1348 states have call predecessors, (1936), 1380 states have call successors, (1936) [2023-11-19 05:19:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10296 states to 10296 states and 13589 transitions. [2023-11-19 05:19:56,424 INFO L78 Accepts]: Start accepts. Automaton has 10296 states and 13589 transitions. Word has length 67 [2023-11-19 05:19:56,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:56,425 INFO L495 AbstractCegarLoop]: Abstraction has 10296 states and 13589 transitions. [2023-11-19 05:19:56,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:19:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 10296 states and 13589 transitions. [2023-11-19 05:19:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 05:19:56,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:56,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:56,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:19:56,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:56,670 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:56,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:56,670 INFO L85 PathProgramCache]: Analyzing trace with hash 318512460, now seen corresponding path program 1 times [2023-11-19 05:19:56,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:56,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878611041] [2023-11-19 05:19:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:56,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 05:19:56,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:56,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878611041] [2023-11-19 05:19:56,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878611041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:56,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:56,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:19:56,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271304088] [2023-11-19 05:19:56,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:56,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:19:56,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:56,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:19:56,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:56,763 INFO L87 Difference]: Start difference. First operand 10296 states and 13589 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 05:19:58,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:58,001 INFO L93 Difference]: Finished difference Result 21851 states and 28930 transitions. [2023-11-19 05:19:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:19:58,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 89 [2023-11-19 05:19:58,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:58,053 INFO L225 Difference]: With dead ends: 21851 [2023-11-19 05:19:58,053 INFO L226 Difference]: Without dead ends: 13024 [2023-11-19 05:19:58,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:58,086 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 84 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:58,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 197 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:19:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13024 states. [2023-11-19 05:19:58,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13024 to 7687. [2023-11-19 05:19:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7687 states, 6015 states have (on average 1.2799667497921863) internal successors, (7699), 6048 states have internal predecessors, (7699), 1016 states have call successors, (1016), 647 states have call predecessors, (1016), 655 states have return successors, (1280), 992 states have call predecessors, (1280), 1016 states have call successors, (1280) [2023-11-19 05:19:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7687 states to 7687 states and 9995 transitions. [2023-11-19 05:19:58,954 INFO L78 Accepts]: Start accepts. Automaton has 7687 states and 9995 transitions. Word has length 89 [2023-11-19 05:19:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:58,955 INFO L495 AbstractCegarLoop]: Abstraction has 7687 states and 9995 transitions. [2023-11-19 05:19:58,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-19 05:19:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 7687 states and 9995 transitions. [2023-11-19 05:19:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 05:19:58,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:58,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:58,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:19:58,971 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:58,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:58,972 INFO L85 PathProgramCache]: Analyzing trace with hash 586062491, now seen corresponding path program 1 times [2023-11-19 05:19:58,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:58,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032646706] [2023-11-19 05:19:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:58,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 05:19:59,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:59,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032646706] [2023-11-19 05:19:59,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032646706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:19:59,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171015489] [2023-11-19 05:19:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:59,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:59,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:59,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:19:59,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:19:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:59,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:19:59,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:19:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:59,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:19:59,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171015489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:59,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:19:59,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:19:59,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583081086] [2023-11-19 05:19:59,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:59,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:19:59,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:59,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:19:59,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:19:59,262 INFO L87 Difference]: Start difference. First operand 7687 states and 9995 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 05:20:00,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:00,127 INFO L93 Difference]: Finished difference Result 14535 states and 19118 transitions. [2023-11-19 05:20:00,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:20:00,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 91 [2023-11-19 05:20:00,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:00,159 INFO L225 Difference]: With dead ends: 14535 [2023-11-19 05:20:00,159 INFO L226 Difference]: Without dead ends: 9241 [2023-11-19 05:20:00,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:20:00,173 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 56 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:00,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 268 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:20:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2023-11-19 05:20:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 8404. [2023-11-19 05:20:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8404 states, 6654 states have (on average 1.2883979561166217) internal successors, (8573), 6687 states have internal predecessors, (8573), 1055 states have call successors, (1055), 686 states have call predecessors, (1055), 694 states have return successors, (1319), 1031 states have call predecessors, (1319), 1055 states have call successors, (1319) [2023-11-19 05:20:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8404 states to 8404 states and 10947 transitions. [2023-11-19 05:20:00,979 INFO L78 Accepts]: Start accepts. Automaton has 8404 states and 10947 transitions. Word has length 91 [2023-11-19 05:20:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:00,981 INFO L495 AbstractCegarLoop]: Abstraction has 8404 states and 10947 transitions. [2023-11-19 05:20:00,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 05:20:00,981 INFO L276 IsEmpty]: Start isEmpty. Operand 8404 states and 10947 transitions. [2023-11-19 05:20:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 05:20:00,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:00,990 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:01,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:20:01,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:20:01,209 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:01,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1827483744, now seen corresponding path program 1 times [2023-11-19 05:20:01,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:01,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406519334] [2023-11-19 05:20:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:01,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 05:20:01,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:01,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406519334] [2023-11-19 05:20:01,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406519334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:01,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:01,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:20:01,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017174459] [2023-11-19 05:20:01,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:01,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:20:01,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:01,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:20:01,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:20:01,275 INFO L87 Difference]: Start difference. First operand 8404 states and 10947 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:20:01,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:01,950 INFO L93 Difference]: Finished difference Result 12561 states and 16561 transitions. [2023-11-19 05:20:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:20:01,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 90 [2023-11-19 05:20:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:01,970 INFO L225 Difference]: With dead ends: 12561 [2023-11-19 05:20:01,970 INFO L226 Difference]: Without dead ends: 5089 [2023-11-19 05:20:01,992 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 [2023-11-19 05:20:01,992 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 194 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:01,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 310 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:20:01,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5089 states. [2023-11-19 05:20:02,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5089 to 5033. [2023-11-19 05:20:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5033 states, 4016 states have (on average 1.2756474103585658) internal successors, (5123), 4035 states have internal predecessors, (5123), 618 states have call successors, (618), 398 states have call predecessors, (618), 398 states have return successors, (618), 600 states have call predecessors, (618), 618 states have call successors, (618) [2023-11-19 05:20:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5033 states to 5033 states and 6359 transitions. [2023-11-19 05:20:02,581 INFO L78 Accepts]: Start accepts. Automaton has 5033 states and 6359 transitions. Word has length 90 [2023-11-19 05:20:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:02,582 INFO L495 AbstractCegarLoop]: Abstraction has 5033 states and 6359 transitions. [2023-11-19 05:20:02,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:20:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 5033 states and 6359 transitions. [2023-11-19 05:20:02,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 05:20:02,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:02,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:02,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:20:02,594 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:02,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:02,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1047502815, now seen corresponding path program 1 times [2023-11-19 05:20:02,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:02,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744987244] [2023-11-19 05:20:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:02,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:20:02,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744987244] [2023-11-19 05:20:02,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744987244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:20:02,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233008850] [2023-11-19 05:20:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:02,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:20:02,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:20:02,842 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:20:02,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:20:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:02,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:20:02,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:20:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:20:03,088 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:20:03,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233008850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:03,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:20:03,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-19 05:20:03,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755718252] [2023-11-19 05:20:03,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:03,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:20:03,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:03,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:20:03,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:20:03,091 INFO L87 Difference]: Start difference. First operand 5033 states and 6359 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 05:20:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:03,958 INFO L93 Difference]: Finished difference Result 9977 states and 12675 transitions. [2023-11-19 05:20:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:20:03,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 90 [2023-11-19 05:20:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:03,985 INFO L225 Difference]: With dead ends: 9977 [2023-11-19 05:20:03,985 INFO L226 Difference]: Without dead ends: 6421 [2023-11-19 05:20:03,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:20:03,996 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 98 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:03,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 393 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:20:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2023-11-19 05:20:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 6165. [2023-11-19 05:20:04,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6165 states, 4845 states have (on average 1.2681114551083592) internal successors, (6144), 4878 states have internal predecessors, (6144), 804 states have call successors, (804), 515 states have call predecessors, (804), 515 states have return successors, (892), 772 states have call predecessors, (892), 804 states have call successors, (892) [2023-11-19 05:20:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6165 states to 6165 states and 7840 transitions. [2023-11-19 05:20:04,840 INFO L78 Accepts]: Start accepts. Automaton has 6165 states and 7840 transitions. Word has length 90 [2023-11-19 05:20:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:04,841 INFO L495 AbstractCegarLoop]: Abstraction has 6165 states and 7840 transitions. [2023-11-19 05:20:04,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 05:20:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 6165 states and 7840 transitions. [2023-11-19 05:20:04,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 05:20:04,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:04,851 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:04,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 05:20:05,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 05:20:05,065 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:05,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:05,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1708836606, now seen corresponding path program 1 times [2023-11-19 05:20:05,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:05,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071391351] [2023-11-19 05:20:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:05,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:20:05,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:05,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071391351] [2023-11-19 05:20:05,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071391351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:05,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:05,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:20:05,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357911958] [2023-11-19 05:20:05,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:05,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:20:05,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:20:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:20:05,155 INFO L87 Difference]: Start difference. First operand 6165 states and 7840 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:20:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:05,896 INFO L93 Difference]: Finished difference Result 10831 states and 14073 transitions. [2023-11-19 05:20:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:20:05,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 90 [2023-11-19 05:20:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:05,917 INFO L225 Difference]: With dead ends: 10831 [2023-11-19 05:20:05,917 INFO L226 Difference]: Without dead ends: 6185 [2023-11-19 05:20:05,926 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 [2023-11-19 05:20:05,927 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 200 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:05,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 310 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:20:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6185 states. [2023-11-19 05:20:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6185 to 6147. [2023-11-19 05:20:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6147 states, 4827 states have (on average 1.2430080795525171) internal successors, (6000), 4860 states have internal predecessors, (6000), 804 states have call successors, (804), 515 states have call predecessors, (804), 515 states have return successors, (892), 772 states have call predecessors, (892), 804 states have call successors, (892) [2023-11-19 05:20:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 7696 transitions. [2023-11-19 05:20:06,540 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 7696 transitions. Word has length 90 [2023-11-19 05:20:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:06,540 INFO L495 AbstractCegarLoop]: Abstraction has 6147 states and 7696 transitions. [2023-11-19 05:20:06,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:20:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 7696 transitions. [2023-11-19 05:20:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 05:20:06,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:06,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:06,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 05:20:06,550 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:06,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:06,550 INFO L85 PathProgramCache]: Analyzing trace with hash -514830062, now seen corresponding path program 1 times [2023-11-19 05:20:06,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:06,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184673912] [2023-11-19 05:20:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:06,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:20:06,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:06,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184673912] [2023-11-19 05:20:06,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184673912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:20:06,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274270388] [2023-11-19 05:20:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:06,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:20:06,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:20:06,724 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:20:06,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:20:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:06,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:20:06,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:20:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:20:06,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:20:06,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274270388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:06,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:20:06,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-11-19 05:20:06,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177176932] [2023-11-19 05:20:06,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:06,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:20:06,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:20:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:20:06,975 INFO L87 Difference]: Start difference. First operand 6147 states and 7696 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 05:20:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:07,682 INFO L93 Difference]: Finished difference Result 11985 states and 15100 transitions. [2023-11-19 05:20:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:20:07,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 90 [2023-11-19 05:20:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:07,709 INFO L225 Difference]: With dead ends: 11985 [2023-11-19 05:20:07,709 INFO L226 Difference]: Without dead ends: 7925 [2023-11-19 05:20:07,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:20:07,719 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 94 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:07,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 378 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:20:07,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7925 states. [2023-11-19 05:20:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7925 to 7649. [2023-11-19 05:20:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7649 states, 5935 states have (on average 1.2392586352148274) internal successors, (7355), 5978 states have internal predecessors, (7355), 1037 states have call successors, (1037), 668 states have call predecessors, (1037), 676 states have return successors, (1299), 1003 states have call predecessors, (1299), 1037 states have call successors, (1299) [2023-11-19 05:20:08,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7649 states to 7649 states and 9691 transitions. [2023-11-19 05:20:08,429 INFO L78 Accepts]: Start accepts. Automaton has 7649 states and 9691 transitions. Word has length 90 [2023-11-19 05:20:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:08,429 INFO L495 AbstractCegarLoop]: Abstraction has 7649 states and 9691 transitions. [2023-11-19 05:20:08,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 05:20:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 7649 states and 9691 transitions. [2023-11-19 05:20:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 05:20:08,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:08,439 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:08,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:20:08,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcd16d05-455c-41f8-b6e4-0348ac782fb8/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 05:20:08,652 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:08,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:08,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1552409635, now seen corresponding path program 1 times [2023-11-19 05:20:08,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:08,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116619419] [2023-11-19 05:20:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:08,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-19 05:20:09,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:09,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116619419] [2023-11-19 05:20:09,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116619419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:09,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:09,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 05:20:09,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669277566] [2023-11-19 05:20:09,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:09,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 05:20:09,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:09,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 05:20:09,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:20:09,137 INFO L87 Difference]: Start difference. First operand 7649 states and 9691 transitions. Second operand has 11 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 05:20:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:11,861 INFO L93 Difference]: Finished difference Result 30680 states and 40256 transitions. [2023-11-19 05:20:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:20:11,862 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 90 [2023-11-19 05:20:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:11,959 INFO L225 Difference]: With dead ends: 30680 [2023-11-19 05:20:11,960 INFO L226 Difference]: Without dead ends: 24397 [2023-11-19 05:20:11,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:20:11,981 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 704 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:11,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 379 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:20:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24397 states. [2023-11-19 05:20:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24397 to 16874. [2023-11-19 05:20:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16874 states, 13471 states have (on average 1.227080394922426) internal successors, (16530), 13580 states have internal predecessors, (16530), 1940 states have call successors, (1940), 1438 states have call predecessors, (1940), 1462 states have return successors, (2470), 1856 states have call predecessors, (2470), 1940 states have call successors, (2470) [2023-11-19 05:20:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16874 states to 16874 states and 20940 transitions. [2023-11-19 05:20:14,150 INFO L78 Accepts]: Start accepts. Automaton has 16874 states and 20940 transitions. Word has length 90 [2023-11-19 05:20:14,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:14,150 INFO L495 AbstractCegarLoop]: Abstraction has 16874 states and 20940 transitions. [2023-11-19 05:20:14,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 05:20:14,151 INFO L276 IsEmpty]: Start isEmpty. Operand 16874 states and 20940 transitions. [2023-11-19 05:20:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 05:20:14,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:14,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:14,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 05:20:14,163 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:14,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:14,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1769068702, now seen corresponding path program 1 times [2023-11-19 05:20:14,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:14,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208031210] [2023-11-19 05:20:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:14,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:20:14,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:14,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208031210] [2023-11-19 05:20:14,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208031210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:14,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:14,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:20:14,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123914540] [2023-11-19 05:20:14,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:14,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:20:14,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:20:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:20:14,247 INFO L87 Difference]: Start difference. First operand 16874 states and 20940 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:20:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:16,059 INFO L93 Difference]: Finished difference Result 26051 states and 33087 transitions. [2023-11-19 05:20:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:20:16,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 90 [2023-11-19 05:20:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:16,133 INFO L225 Difference]: With dead ends: 26051 [2023-11-19 05:20:16,133 INFO L226 Difference]: Without dead ends: 16754 [2023-11-19 05:20:16,156 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 [2023-11-19 05:20:16,157 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 209 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:16,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 310 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:20:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16754 states. [2023-11-19 05:20:17,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16754 to 16606. [2023-11-19 05:20:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16606 states, 13227 states have (on average 1.2048083465638466) internal successors, (15936), 13312 states have internal predecessors, (15936), 1940 states have call successors, (1940), 1438 states have call predecessors, (1940), 1438 states have return successors, (2425), 1856 states have call predecessors, (2425), 1940 states have call successors, (2425) [2023-11-19 05:20:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16606 states to 16606 states and 20301 transitions. [2023-11-19 05:20:17,972 INFO L78 Accepts]: Start accepts. Automaton has 16606 states and 20301 transitions. Word has length 90 [2023-11-19 05:20:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:17,973 INFO L495 AbstractCegarLoop]: Abstraction has 16606 states and 20301 transitions. [2023-11-19 05:20:17,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:20:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 16606 states and 20301 transitions. [2023-11-19 05:20:17,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 05:20:17,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:17,982 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:17,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 05:20:17,983 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:17,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:17,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1297179044, now seen corresponding path program 1 times [2023-11-19 05:20:17,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:17,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593148082] [2023-11-19 05:20:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:17,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:20:18,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:18,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593148082] [2023-11-19 05:20:18,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593148082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:18,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:18,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:20:18,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460877742] [2023-11-19 05:20:18,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:18,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:20:18,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:18,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:20:18,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:20:18,181 INFO L87 Difference]: Start difference. First operand 16606 states and 20301 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 05:20:20,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:20,334 INFO L93 Difference]: Finished difference Result 28321 states and 34815 transitions. [2023-11-19 05:20:20,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:20:20,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 91 [2023-11-19 05:20:20,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:20,409 INFO L225 Difference]: With dead ends: 28321 [2023-11-19 05:20:20,409 INFO L226 Difference]: Without dead ends: 20721 [2023-11-19 05:20:20,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:20:20,429 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 86 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:20,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 371 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:20:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20721 states. [2023-11-19 05:20:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20721 to 20115. [2023-11-19 05:20:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20115 states, 15990 states have (on average 1.1996873045653533) internal successors, (19183), 16051 states have internal predecessors, (19183), 2399 states have call successors, (2399), 1773 states have call predecessors, (2399), 1725 states have return successors, (3069), 2291 states have call predecessors, (3069), 2399 states have call successors, (3069) [2023-11-19 05:20:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20115 states to 20115 states and 24651 transitions. [2023-11-19 05:20:22,339 INFO L78 Accepts]: Start accepts. Automaton has 20115 states and 24651 transitions. Word has length 91 [2023-11-19 05:20:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:22,339 INFO L495 AbstractCegarLoop]: Abstraction has 20115 states and 24651 transitions. [2023-11-19 05:20:22,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 05:20:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 20115 states and 24651 transitions. [2023-11-19 05:20:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-19 05:20:22,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:22,369 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:22,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 05:20:22,369 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:22,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:22,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1278845054, now seen corresponding path program 1 times [2023-11-19 05:20:22,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:22,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154452368] [2023-11-19 05:20:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:22,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 05:20:22,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:22,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154452368] [2023-11-19 05:20:22,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154452368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:22,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:22,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:20:22,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296142667] [2023-11-19 05:20:22,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:22,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:20:22,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:20:22,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:20:22,791 INFO L87 Difference]: Start difference. First operand 20115 states and 24651 transitions. Second operand has 8 states, 6 states have (on average 12.166666666666666) internal successors, (73), 7 states have internal predecessors, (73), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9)