./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.05.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/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_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.05.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/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_444bcbf1-c497-4836-a655-715656473cc3/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 d8722862ca37b1ee13dec8b9e420cd40ba7901837b8f3b6258499da6e8a2ca6f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:12:23,991 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:12:24,128 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:12:24,136 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:12:24,137 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:12:24,178 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:12:24,179 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:12:24,180 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:12:24,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:12:24,187 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:12:24,188 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:12:24,188 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:12:24,189 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:12:24,190 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:12:24,190 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:12:24,191 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:12:24,191 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:12:24,192 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:12:24,193 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:12:24,193 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:12:24,194 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:12:24,195 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:12:24,196 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:12:24,196 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:12:24,197 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:12:24,197 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:12:24,198 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:12:24,199 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:12:24,199 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:12:24,200 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:12:24,200 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:12:24,201 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:12:24,201 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:12:24,202 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:12:24,202 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:12:24,203 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:12:24,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:24,203 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:12:24,204 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:12:24,204 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:12:24,204 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:12:24,205 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:12:24,205 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:12:24,206 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:12:24,206 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:12:24,206 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_444bcbf1-c497-4836-a655-715656473cc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8722862ca37b1ee13dec8b9e420cd40ba7901837b8f3b6258499da6e8a2ca6f [2023-11-19 05:12:24,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:12:24,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:12:24,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:12:24,588 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:12:24,589 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:12:24,591 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/systemc/transmitter.05.cil.c [2023-11-19 05:12:27,747 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:12:28,078 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:12:28,081 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/sv-benchmarks/c/systemc/transmitter.05.cil.c [2023-11-19 05:12:28,100 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/data/f20981b19/9ce60bca59df46ac959bf78962c1c15b/FLAGc0d3ae654 [2023-11-19 05:12:28,121 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/data/f20981b19/9ce60bca59df46ac959bf78962c1c15b [2023-11-19 05:12:28,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:12:28,129 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:12:28,135 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:12:28,135 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:12:28,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:12:28,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13f3627b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28, skipping insertion in model container [2023-11-19 05:12:28,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,215 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:12:28,424 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_444bcbf1-c497-4836-a655-715656473cc3/sv-benchmarks/c/systemc/transmitter.05.cil.c[706,719] [2023-11-19 05:12:28,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:12:28,562 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:12:28,576 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_444bcbf1-c497-4836-a655-715656473cc3/sv-benchmarks/c/systemc/transmitter.05.cil.c[706,719] [2023-11-19 05:12:28,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:12:28,649 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:12:28,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28 WrapperNode [2023-11-19 05:12:28,650 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:12:28,651 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:12:28,651 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:12:28,651 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:12:28,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,670 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,713 INFO L138 Inliner]: procedures = 38, calls = 45, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 446 [2023-11-19 05:12:28,714 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:12:28,715 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:12:28,715 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:12:28,715 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:12:28,725 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,726 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,730 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,730 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,741 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,752 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,755 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,764 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:12:28,766 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:12:28,766 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:12:28,766 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:12:28,767 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28" (1/1) ... [2023-11-19 05:12:28,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:28,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:28,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:12:28,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:12:28,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:12:28,868 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:12:28,869 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:12:28,869 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:12:28,869 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:12:28,869 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:12:28,869 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:12:28,870 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:12:28,870 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:12:28,870 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:12:28,870 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:12:28,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:12:28,871 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:12:28,871 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:12:28,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:12:28,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:12:28,970 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:12:28,973 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:12:29,697 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:12:30,122 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:12:30,123 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-19 05:12:30,138 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:30 BoogieIcfgContainer [2023-11-19 05:12:30,138 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:12:30,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:12:30,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:12:30,148 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:12:30,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:12:28" (1/3) ... [2023-11-19 05:12:30,150 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cf44f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:30, skipping insertion in model container [2023-11-19 05:12:30,151 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:28" (2/3) ... [2023-11-19 05:12:30,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cf44f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:30, skipping insertion in model container [2023-11-19 05:12:30,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:30" (3/3) ... [2023-11-19 05:12:30,155 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.05.cil.c [2023-11-19 05:12:30,180 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:12:30,180 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:12:30,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:12:30,261 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;@758de4ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:12:30,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:12:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 89 states have (on average 1.4943820224719102) internal successors, (133), 91 states have internal predecessors, (133), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-19 05:12:30,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 05:12:30,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:30,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:30,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:30,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:30,288 INFO L85 PathProgramCache]: Analyzing trace with hash -593551298, now seen corresponding path program 1 times [2023-11-19 05:12:30,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:30,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359190012] [2023-11-19 05:12:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:30,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:30,829 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 05:12:30,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:30,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359190012] [2023-11-19 05:12:30,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359190012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:30,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:30,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:12:30,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393241825] [2023-11-19 05:12:30,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:30,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:12:30,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:30,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:12:30,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:12:30,901 INFO L87 Difference]: Start difference. First operand has 115 states, 89 states have (on average 1.4943820224719102) internal successors, (133), 91 states have internal predecessors, (133), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 05:12:31,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:31,317 INFO L93 Difference]: Finished difference Result 328 states and 495 transitions. [2023-11-19 05:12:31,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:12:31,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 49 [2023-11-19 05:12:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:31,333 INFO L225 Difference]: With dead ends: 328 [2023-11-19 05:12:31,333 INFO L226 Difference]: Without dead ends: 214 [2023-11-19 05:12:31,343 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 05:12:31,351 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 280 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:31,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 430 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:12:31,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-19 05:12:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2023-11-19 05:12:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 167 states have (on average 1.4131736526946108) internal successors, (236), 168 states have internal predecessors, (236), 31 states have call successors, (31), 12 states have call predecessors, (31), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 05:12:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 298 transitions. [2023-11-19 05:12:31,464 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 298 transitions. Word has length 49 [2023-11-19 05:12:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:31,465 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 298 transitions. [2023-11-19 05:12:31,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 05:12:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 298 transitions. [2023-11-19 05:12:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 05:12:31,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:31,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:31,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:12:31,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:31,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:31,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1550479681, now seen corresponding path program 1 times [2023-11-19 05:12:31,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:31,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211226133] [2023-11-19 05:12:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:31,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:31,725 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 05:12:31,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:31,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211226133] [2023-11-19 05:12:31,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211226133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:31,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:31,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:12:31,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167289820] [2023-11-19 05:12:31,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:31,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:12:31,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:31,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:12:31,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:12:31,731 INFO L87 Difference]: Start difference. First operand 211 states and 298 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 05:12:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:32,365 INFO L93 Difference]: Finished difference Result 713 states and 1013 transitions. [2023-11-19 05:12:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:12:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 49 [2023-11-19 05:12:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:32,379 INFO L225 Difference]: With dead ends: 713 [2023-11-19 05:12:32,379 INFO L226 Difference]: Without dead ends: 488 [2023-11-19 05:12:32,387 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 05:12:32,391 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 558 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:32,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 647 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:32,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-11-19 05:12:32,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 476. [2023-11-19 05:12:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 387 states have (on average 1.4056847545219637) internal successors, (544), 384 states have internal predecessors, (544), 60 states have call successors, (60), 26 states have call predecessors, (60), 28 states have return successors, (66), 66 states have call predecessors, (66), 60 states have call successors, (66) [2023-11-19 05:12:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 670 transitions. [2023-11-19 05:12:32,494 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 670 transitions. Word has length 49 [2023-11-19 05:12:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:32,495 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 670 transitions. [2023-11-19 05:12:32,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 05:12:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 670 transitions. [2023-11-19 05:12:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 05:12:32,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:32,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:32,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:12:32,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:32,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:32,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1167929856, now seen corresponding path program 1 times [2023-11-19 05:12:32,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:32,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565746215] [2023-11-19 05:12:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:32,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:32,648 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 05:12:32,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:32,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565746215] [2023-11-19 05:12:32,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565746215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:32,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:32,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:12:32,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438092312] [2023-11-19 05:12:32,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:32,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:12:32,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:12:32,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:12:32,652 INFO L87 Difference]: Start difference. First operand 476 states and 670 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 05:12:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:33,216 INFO L93 Difference]: Finished difference Result 1645 states and 2336 transitions. [2023-11-19 05:12:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:12:33,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 49 [2023-11-19 05:12:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:33,230 INFO L225 Difference]: With dead ends: 1645 [2023-11-19 05:12:33,238 INFO L226 Difference]: Without dead ends: 1139 [2023-11-19 05:12:33,244 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 05:12:33,248 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 558 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:33,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 500 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:12:33,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2023-11-19 05:12:33,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 887. [2023-11-19 05:12:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 722 states have (on average 1.4044321329639888) internal successors, (1014), 720 states have internal predecessors, (1014), 108 states have call successors, (108), 50 states have call predecessors, (108), 56 states have return successors, (125), 117 states have call predecessors, (125), 108 states have call successors, (125) [2023-11-19 05:12:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1247 transitions. [2023-11-19 05:12:33,377 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1247 transitions. Word has length 49 [2023-11-19 05:12:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:33,378 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1247 transitions. [2023-11-19 05:12:33,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 05:12:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1247 transitions. [2023-11-19 05:12:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 05:12:33,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:33,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:33,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:12:33,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:33,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1110785631, now seen corresponding path program 1 times [2023-11-19 05:12:33,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:33,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980134477] [2023-11-19 05:12:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:33,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:33,513 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 05:12:33,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:33,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980134477] [2023-11-19 05:12:33,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980134477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:33,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:33,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:12:33,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120760126] [2023-11-19 05:12:33,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:33,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:12:33,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:33,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:12:33,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:12:33,517 INFO L87 Difference]: Start difference. First operand 887 states and 1247 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 05:12:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:34,131 INFO L93 Difference]: Finished difference Result 3016 states and 4301 transitions. [2023-11-19 05:12:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:12:34,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 49 [2023-11-19 05:12:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:34,153 INFO L225 Difference]: With dead ends: 3016 [2023-11-19 05:12:34,153 INFO L226 Difference]: Without dead ends: 2068 [2023-11-19 05:12:34,158 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 05:12:34,166 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 560 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:34,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 498 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:12:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2023-11-19 05:12:34,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1691. [2023-11-19 05:12:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1370 states have (on average 1.397080291970803) internal successors, (1914), 1372 states have internal predecessors, (1914), 208 states have call successors, (208), 98 states have call predecessors, (208), 112 states have return successors, (249), 221 states have call predecessors, (249), 208 states have call successors, (249) [2023-11-19 05:12:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2371 transitions. [2023-11-19 05:12:34,374 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2371 transitions. Word has length 49 [2023-11-19 05:12:34,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:34,375 INFO L495 AbstractCegarLoop]: Abstraction has 1691 states and 2371 transitions. [2023-11-19 05:12:34,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 05:12:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2371 transitions. [2023-11-19 05:12:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 05:12:34,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:34,379 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, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:34,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:12:34,379 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:34,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1457531928, now seen corresponding path program 1 times [2023-11-19 05:12:34,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:34,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372247243] [2023-11-19 05:12:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:34,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:12:34,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:34,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372247243] [2023-11-19 05:12:34,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372247243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:34,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:34,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:12:34,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469563933] [2023-11-19 05:12:34,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:34,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:12:34,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:34,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:12:34,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:34,726 INFO L87 Difference]: Start difference. First operand 1691 states and 2371 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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 05:12:35,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:35,375 INFO L93 Difference]: Finished difference Result 4771 states and 6717 transitions. [2023-11-19 05:12:35,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:12:35,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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 65 [2023-11-19 05:12:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:35,406 INFO L225 Difference]: With dead ends: 4771 [2023-11-19 05:12:35,407 INFO L226 Difference]: Without dead ends: 3086 [2023-11-19 05:12:35,417 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 05:12:35,418 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 430 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:35,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 358 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:12:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2023-11-19 05:12:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 2790. [2023-11-19 05:12:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2281 states have (on average 1.387110916264796) internal successors, (3164), 2284 states have internal predecessors, (3164), 316 states have call successors, (316), 164 states have call predecessors, (316), 192 states have return successors, (398), 342 states have call predecessors, (398), 316 states have call successors, (398) [2023-11-19 05:12:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 3878 transitions. [2023-11-19 05:12:35,677 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 3878 transitions. Word has length 65 [2023-11-19 05:12:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:35,678 INFO L495 AbstractCegarLoop]: Abstraction has 2790 states and 3878 transitions. [2023-11-19 05:12:35,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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 05:12:35,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 3878 transitions. [2023-11-19 05:12:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 05:12:35,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:35,682 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:12:35,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:12:35,682 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:35,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:35,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1401901812, now seen corresponding path program 1 times [2023-11-19 05:12:35,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:35,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937837140] [2023-11-19 05:12:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:35,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:12:35,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:35,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937837140] [2023-11-19 05:12:35,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937837140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:35,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:35,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:12:35,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789057820] [2023-11-19 05:12:35,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:35,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:12:35,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:35,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:12:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:35,960 INFO L87 Difference]: Start difference. First operand 2790 states and 3878 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 05:12:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:36,736 INFO L93 Difference]: Finished difference Result 9040 states and 12594 transitions. [2023-11-19 05:12:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:12:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 69 [2023-11-19 05:12:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:36,785 INFO L225 Difference]: With dead ends: 9040 [2023-11-19 05:12:36,785 INFO L226 Difference]: Without dead ends: 6256 [2023-11-19 05:12:36,796 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 05:12:36,797 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 427 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:36,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 418 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:12:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2023-11-19 05:12:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 5418. [2023-11-19 05:12:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5418 states, 4429 states have (on average 1.3757055768796569) internal successors, (6093), 4436 states have internal predecessors, (6093), 604 states have call successors, (604), 328 states have call predecessors, (604), 384 states have return successors, (754), 654 states have call predecessors, (754), 604 states have call successors, (754) [2023-11-19 05:12:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 7451 transitions. [2023-11-19 05:12:37,390 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 7451 transitions. Word has length 69 [2023-11-19 05:12:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:37,390 INFO L495 AbstractCegarLoop]: Abstraction has 5418 states and 7451 transitions. [2023-11-19 05:12:37,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 05:12:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 7451 transitions. [2023-11-19 05:12:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 05:12:37,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:37,398 INFO L195 NwaCegarLoop]: trace histogram [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 05:12:37,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:12:37,398 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:37,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:37,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1965462942, now seen corresponding path program 1 times [2023-11-19 05:12:37,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:37,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300506062] [2023-11-19 05:12:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:37,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 05:12:37,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:37,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300506062] [2023-11-19 05:12:37,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300506062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:37,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:37,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:12:37,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692211960] [2023-11-19 05:12:37,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:37,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:12:37,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:37,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:12:37,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:37,659 INFO L87 Difference]: Start difference. First operand 5418 states and 7451 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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 05:12:38,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:38,651 INFO L93 Difference]: Finished difference Result 14118 states and 19455 transitions. [2023-11-19 05:12:38,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:12:38,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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 73 [2023-11-19 05:12:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:38,711 INFO L225 Difference]: With dead ends: 14118 [2023-11-19 05:12:38,712 INFO L226 Difference]: Without dead ends: 8706 [2023-11-19 05:12:38,728 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 05:12:38,729 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 398 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:38,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 362 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:12:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8706 states. [2023-11-19 05:12:39,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8706 to 8040. [2023-11-19 05:12:39,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8040 states, 6563 states have (on average 1.3650769465183605) internal successors, (8959), 6564 states have internal predecessors, (8959), 900 states have call successors, (900), 496 states have call predecessors, (900), 576 states have return successors, (1108), 980 states have call predecessors, (1108), 900 states have call successors, (1108) [2023-11-19 05:12:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8040 states to 8040 states and 10967 transitions. [2023-11-19 05:12:39,469 INFO L78 Accepts]: Start accepts. Automaton has 8040 states and 10967 transitions. Word has length 73 [2023-11-19 05:12:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:39,469 INFO L495 AbstractCegarLoop]: Abstraction has 8040 states and 10967 transitions. [2023-11-19 05:12:39,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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 05:12:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 8040 states and 10967 transitions. [2023-11-19 05:12:39,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-19 05:12:39,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:39,476 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:39,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:12:39,476 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:39,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:39,477 INFO L85 PathProgramCache]: Analyzing trace with hash 413464321, now seen corresponding path program 1 times [2023-11-19 05:12:39,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:39,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591311022] [2023-11-19 05:12:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:39,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:12:39,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:39,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591311022] [2023-11-19 05:12:39,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591311022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:39,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:39,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:12:39,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97516963] [2023-11-19 05:12:39,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:39,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:12:39,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:39,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:12:39,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:39,813 INFO L87 Difference]: Start difference. First operand 8040 states and 10967 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 05:12:41,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:41,284 INFO L93 Difference]: Finished difference Result 20802 states and 28425 transitions. [2023-11-19 05:12:41,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:12:41,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 77 [2023-11-19 05:12:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:41,379 INFO L225 Difference]: With dead ends: 20802 [2023-11-19 05:12:41,379 INFO L226 Difference]: Without dead ends: 12768 [2023-11-19 05:12:41,406 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 05:12:41,407 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 394 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:41,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 415 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:12:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12768 states. [2023-11-19 05:12:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12768 to 11990. [2023-11-19 05:12:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11990 states, 9779 states have (on average 1.3540239288270783) internal successors, (13241), 9764 states have internal predecessors, (13241), 1346 states have call successors, (1346), 752 states have call predecessors, (1346), 864 states have return successors, (1630), 1474 states have call predecessors, (1630), 1346 states have call successors, (1630) [2023-11-19 05:12:42,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11990 states to 11990 states and 16217 transitions. [2023-11-19 05:12:42,556 INFO L78 Accepts]: Start accepts. Automaton has 11990 states and 16217 transitions. Word has length 77 [2023-11-19 05:12:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:42,557 INFO L495 AbstractCegarLoop]: Abstraction has 11990 states and 16217 transitions. [2023-11-19 05:12:42,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 05:12:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 11990 states and 16217 transitions. [2023-11-19 05:12:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-19 05:12:42,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:42,574 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:42,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:12:42,574 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:42,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:42,575 INFO L85 PathProgramCache]: Analyzing trace with hash 771105088, now seen corresponding path program 1 times [2023-11-19 05:12:42,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:42,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319569612] [2023-11-19 05:12:42,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:42,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:12:42,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:42,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319569612] [2023-11-19 05:12:42,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319569612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:42,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396520946] [2023-11-19 05:12:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:42,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:42,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:42,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:42,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:12:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:42,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:42,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:12:43,048 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:43,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396520946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:43,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:43,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:12:43,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461164146] [2023-11-19 05:12:43,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:43,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:43,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:43,051 INFO L87 Difference]: Start difference. First operand 11990 states and 16217 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 05:12:44,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:44,674 INFO L93 Difference]: Finished difference Result 23119 states and 31617 transitions. [2023-11-19 05:12:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:44,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 81 [2023-11-19 05:12:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:44,777 INFO L225 Difference]: With dead ends: 23119 [2023-11-19 05:12:44,778 INFO L226 Difference]: Without dead ends: 16293 [2023-11-19 05:12:44,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 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 05:12:44,809 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 97 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:44,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 367 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:12:44,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16293 states. [2023-11-19 05:12:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16293 to 13550. [2023-11-19 05:12:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13550 states, 11231 states have (on average 1.363102128038465) internal successors, (15309), 11216 states have internal predecessors, (15309), 1400 states have call successors, (1400), 806 states have call predecessors, (1400), 918 states have return successors, (1684), 1528 states have call predecessors, (1684), 1400 states have call successors, (1684) [2023-11-19 05:12:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13550 states to 13550 states and 18393 transitions. [2023-11-19 05:12:46,192 INFO L78 Accepts]: Start accepts. Automaton has 13550 states and 18393 transitions. Word has length 81 [2023-11-19 05:12:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:46,192 INFO L495 AbstractCegarLoop]: Abstraction has 13550 states and 18393 transitions. [2023-11-19 05:12:46,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 05:12:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 13550 states and 18393 transitions. [2023-11-19 05:12:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 05:12:46,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:46,203 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] [2023-11-19 05:12:46,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:46,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:46,419 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:46,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:46,420 INFO L85 PathProgramCache]: Analyzing trace with hash -148638939, now seen corresponding path program 1 times [2023-11-19 05:12:46,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:46,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87104984] [2023-11-19 05:12:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:46,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:12:46,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:46,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87104984] [2023-11-19 05:12:46,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87104984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:46,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:46,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:12:46,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393122788] [2023-11-19 05:12:46,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:46,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:46,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:46,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:46,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:46,503 INFO L87 Difference]: Start difference. First operand 13550 states and 18393 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:12:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:47,767 INFO L93 Difference]: Finished difference Result 23681 states and 32272 transitions. [2023-11-19 05:12:47,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:47,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 86 [2023-11-19 05:12:47,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:47,831 INFO L225 Difference]: With dead ends: 23681 [2023-11-19 05:12:47,831 INFO L226 Difference]: Without dead ends: 14520 [2023-11-19 05:12:47,861 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 05:12:47,862 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 121 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:47,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 266 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:12:47,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14520 states. [2023-11-19 05:12:49,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14520 to 13098. [2023-11-19 05:12:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13098 states, 10867 states have (on average 1.3552038281034324) internal successors, (14727), 10838 states have internal predecessors, (14727), 1388 states have call successors, (1388), 802 states have call predecessors, (1388), 842 states have return successors, (1486), 1458 states have call predecessors, (1486), 1388 states have call successors, (1486) [2023-11-19 05:12:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13098 states to 13098 states and 17601 transitions. [2023-11-19 05:12:49,117 INFO L78 Accepts]: Start accepts. Automaton has 13098 states and 17601 transitions. Word has length 86 [2023-11-19 05:12:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:49,118 INFO L495 AbstractCegarLoop]: Abstraction has 13098 states and 17601 transitions. [2023-11-19 05:12:49,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:12:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 13098 states and 17601 transitions. [2023-11-19 05:12:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-19 05:12:49,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:49,141 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, 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 05:12:49,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:12:49,142 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:49,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:49,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1829356883, now seen corresponding path program 1 times [2023-11-19 05:12:49,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:49,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319879088] [2023-11-19 05:12:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:49,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 05:12:49,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:49,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319879088] [2023-11-19 05:12:49,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319879088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:49,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:49,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:12:49,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674618761] [2023-11-19 05:12:49,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:49,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:49,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:49,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:49,260 INFO L87 Difference]: Start difference. First operand 13098 states and 17601 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 05:12:51,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:51,185 INFO L93 Difference]: Finished difference Result 35578 states and 48071 transitions. [2023-11-19 05:12:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:51,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 111 [2023-11-19 05:12:51,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:51,279 INFO L225 Difference]: With dead ends: 35578 [2023-11-19 05:12:51,279 INFO L226 Difference]: Without dead ends: 22486 [2023-11-19 05:12:51,305 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 05:12:51,306 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 90 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:51,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 327 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:12:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22486 states. [2023-11-19 05:12:52,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22486 to 18000. [2023-11-19 05:12:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18000 states, 15409 states have (on average 1.3629047958985008) internal successors, (21001), 15381 states have internal predecessors, (21001), 1568 states have call successors, (1568), 982 states have call predecessors, (1568), 1022 states have return successors, (1666), 1637 states have call predecessors, (1666), 1568 states have call successors, (1666) [2023-11-19 05:12:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18000 states to 18000 states and 24235 transitions. [2023-11-19 05:12:52,922 INFO L78 Accepts]: Start accepts. Automaton has 18000 states and 24235 transitions. Word has length 111 [2023-11-19 05:12:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:52,922 INFO L495 AbstractCegarLoop]: Abstraction has 18000 states and 24235 transitions. [2023-11-19 05:12:52,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 05:12:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 18000 states and 24235 transitions. [2023-11-19 05:12:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-19 05:12:52,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:52,949 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, 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] [2023-11-19 05:12:52,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:12:52,950 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:52,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:52,951 INFO L85 PathProgramCache]: Analyzing trace with hash 294279058, now seen corresponding path program 1 times [2023-11-19 05:12:52,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:52,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528164392] [2023-11-19 05:12:52,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:52,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-19 05:12:53,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:53,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528164392] [2023-11-19 05:12:53,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528164392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:53,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:53,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:12:53,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988798370] [2023-11-19 05:12:53,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:53,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:53,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:53,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:53,045 INFO L87 Difference]: Start difference. First operand 18000 states and 24235 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 05:12:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:55,429 INFO L93 Difference]: Finished difference Result 53157 states and 71972 transitions. [2023-11-19 05:12:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:55,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 113 [2023-11-19 05:12:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:55,581 INFO L225 Difference]: With dead ends: 53157 [2023-11-19 05:12:55,581 INFO L226 Difference]: Without dead ends: 35162 [2023-11-19 05:12:55,621 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 05:12:55,622 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 116 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:55,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 253 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:12:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35162 states. [2023-11-19 05:12:58,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35162 to 34588. [2023-11-19 05:12:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34588 states, 29609 states have (on average 1.3513796480799758) internal successors, (40013), 29563 states have internal predecessors, (40013), 2982 states have call successors, (2982), 1922 states have call predecessors, (2982), 1996 states have return successors, (3152), 3103 states have call predecessors, (3152), 2982 states have call successors, (3152) [2023-11-19 05:12:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34588 states to 34588 states and 46147 transitions. [2023-11-19 05:12:58,665 INFO L78 Accepts]: Start accepts. Automaton has 34588 states and 46147 transitions. Word has length 113 [2023-11-19 05:12:58,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:58,666 INFO L495 AbstractCegarLoop]: Abstraction has 34588 states and 46147 transitions. [2023-11-19 05:12:58,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 05:12:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 34588 states and 46147 transitions. [2023-11-19 05:12:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-19 05:12:58,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:58,715 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, 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 05:12:58,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 05:12:58,716 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:58,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:58,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1473003739, now seen corresponding path program 1 times [2023-11-19 05:12:58,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:58,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566065459] [2023-11-19 05:12:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:58,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:12:58,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:58,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566065459] [2023-11-19 05:12:58,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566065459] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:58,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902673930] [2023-11-19 05:12:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:58,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:58,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:58,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:58,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:12:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:59,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:59,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:12:59,131 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:59,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902673930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:59,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:59,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:12:59,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124542415] [2023-11-19 05:12:59,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:59,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:59,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:59,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:59,135 INFO L87 Difference]: Start difference. First operand 34588 states and 46147 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 05:13:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:02,454 INFO L93 Difference]: Finished difference Result 66746 states and 89569 transitions. [2023-11-19 05:13:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:13:02,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 111 [2023-11-19 05:13:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:02,649 INFO L225 Difference]: With dead ends: 66746 [2023-11-19 05:13:02,649 INFO L226 Difference]: Without dead ends: 43298 [2023-11-19 05:13:02,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 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 05:13:02,881 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 79 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:02,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 354 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:13:02,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43298 states. [2023-11-19 05:13:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43298 to 40786. [2023-11-19 05:13:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40786 states, 35327 states have (on average 1.357460299487644) internal successors, (47955), 35281 states have internal predecessors, (47955), 3222 states have call successors, (3222), 2162 states have call predecessors, (3222), 2236 states have return successors, (3392), 3343 states have call predecessors, (3392), 3222 states have call successors, (3392) [2023-11-19 05:13:05,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40786 states to 40786 states and 54569 transitions. [2023-11-19 05:13:05,701 INFO L78 Accepts]: Start accepts. Automaton has 40786 states and 54569 transitions. Word has length 111 [2023-11-19 05:13:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:05,702 INFO L495 AbstractCegarLoop]: Abstraction has 40786 states and 54569 transitions. [2023-11-19 05:13:05,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 05:13:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 40786 states and 54569 transitions. [2023-11-19 05:13:05,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-19 05:13:05,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:05,907 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:05,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:06,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:06,127 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:06,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:06,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1376717539, now seen corresponding path program 1 times [2023-11-19 05:13:06,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:06,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731123477] [2023-11-19 05:13:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:06,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-19 05:13:06,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:06,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731123477] [2023-11-19 05:13:06,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731123477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:06,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332445720] [2023-11-19 05:13:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:06,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:06,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:06,262 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:06,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_444bcbf1-c497-4836-a655-715656473cc3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:13:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:06,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:13:06,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:06,526 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:13:06,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332445720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:06,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:13:06,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:13:06,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198955126] [2023-11-19 05:13:06,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:06,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:13:06,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:13:06,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:13:06,531 INFO L87 Difference]: Start difference. First operand 40786 states and 54569 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 05:13:09,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:09,634 INFO L93 Difference]: Finished difference Result 78502 states and 105497 transitions. [2023-11-19 05:13:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:13:09,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 111 [2023-11-19 05:13:09,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:09,790 INFO L225 Difference]: With dead ends: 78502 [2023-11-19 05:13:09,791 INFO L226 Difference]: Without dead ends: 50762 [2023-11-19 05:13:09,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 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 05:13:09,836 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 71 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:09,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 348 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:13:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50762 states.