./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --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 64bit --witnessprinter.graph.data.programhash 57ba9a4d546a973620a0029f54a814a104db676a0fd0f250dd5545a7c0f94302 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:28:15,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:28:15,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:28:15,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:28:15,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:28:15,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:28:15,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:28:15,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:28:15,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:28:15,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:28:15,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:28:15,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:28:15,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:28:15,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:28:15,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:28:15,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:28:15,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:28:15,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:28:15,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:28:15,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:28:15,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:28:15,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:28:15,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:28:15,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:28:15,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:28:15,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:28:15,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:28:15,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:28:15,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:28:15,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:28:15,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:28:15,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:28:15,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:28:15,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:28:15,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:28:15,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:28:15,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:28:15,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:28:15,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:28:15,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:28:15,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:28:15,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:28:15,274 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:28:15,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:28:15,275 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:28:15,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:28:15,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:28:15,276 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:28:15,276 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:28:15,276 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:28:15,277 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:28:15,277 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:28:15,278 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:28:15,278 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:28:15,278 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:28:15,278 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:28:15,278 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:28:15,279 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:28:15,279 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:28:15,279 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:28:15,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:28:15,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:28:15,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:28:15,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:28:15,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:28:15,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:28:15,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:28:15,281 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:28:15,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:28:15,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:28:15,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:28:15,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:28:15,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:28:15,283 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:28:15,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:28:15,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:28:15,283 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:28:15,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:28:15,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:28:15,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:28:15,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57ba9a4d546a973620a0029f54a814a104db676a0fd0f250dd5545a7c0f94302 [2022-11-23 14:28:15,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:28:15,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:28:15,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:28:15,656 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:28:15,656 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:28:15,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2022-11-23 14:28:18,712 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:28:19,186 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:28:19,187 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2022-11-23 14:28:19,232 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/data/6c3aa7fb4/06395550f3a04571b38608dd1066ea18/FLAG1e24f55c9 [2022-11-23 14:28:19,254 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/data/6c3aa7fb4/06395550f3a04571b38608dd1066ea18 [2022-11-23 14:28:19,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:28:19,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:28:19,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:28:19,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:28:19,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:28:19,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:28:19" (1/1) ... [2022-11-23 14:28:19,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@570650ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:19, skipping insertion in model container [2022-11-23 14:28:19,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:28:19" (1/1) ... [2022-11-23 14:28:19,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:28:19,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:28:20,232 WARN L237 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_23dbd3b2-0672-4d51-9211-d407556af907/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i[101600,101613] [2022-11-23 14:28:20,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:28:20,564 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:28:20,719 WARN L237 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_23dbd3b2-0672-4d51-9211-d407556af907/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i[101600,101613] [2022-11-23 14:28:20,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:28:20,866 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:28:20,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20 WrapperNode [2022-11-23 14:28:20,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:28:20,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:28:20,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:28:20,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:28:20,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20" (1/1) ... [2022-11-23 14:28:20,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20" (1/1) ... [2022-11-23 14:28:21,019 INFO L138 Inliner]: procedures = 113, calls = 441, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1251 [2022-11-23 14:28:21,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:28:21,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:28:21,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:28:21,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:28:21,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20" (1/1) ... [2022-11-23 14:28:21,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20" (1/1) ... [2022-11-23 14:28:21,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20" (1/1) ... [2022-11-23 14:28:21,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20" (1/1) ... [2022-11-23 14:28:21,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20" (1/1) ... [2022-11-23 14:28:21,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20" (1/1) ... [2022-11-23 14:28:21,095 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20" (1/1) ... [2022-11-23 14:28:21,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20" (1/1) ... [2022-11-23 14:28:21,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:28:21,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:28:21,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:28:21,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:28:21,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20" (1/1) ... [2022-11-23 14:28:21,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:28:21,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:28:21,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:28:21,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:28:21,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 14:28:21,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 14:28:21,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 14:28:21,315 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 14:28:21,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 14:28:21,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:28:21,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 14:28:21,315 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 14:28:21,316 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-23 14:28:21,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-23 14:28:21,316 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 14:28:21,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 14:28:21,316 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 14:28:21,316 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 14:28:21,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:28:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 14:28:21,317 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 14:28:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 14:28:21,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 14:28:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 14:28:21,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 14:28:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 14:28:21,318 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 14:28:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:28:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure idmouse_resume [2022-11-23 14:28:21,318 INFO L138 BoogieDeclarations]: Found implementation of procedure idmouse_resume [2022-11-23 14:28:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-23 14:28:21,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-23 14:28:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_2 [2022-11-23 14:28:21,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_2 [2022-11-23 14:28:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:28:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-23 14:28:21,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-23 14:28:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:28:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:28:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 14:28:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_5 [2022-11-23 14:28:21,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_5 [2022-11-23 14:28:21,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:28:21,320 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-11-23 14:28:21,320 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-11-23 14:28:21,320 INFO L130 BoogieDeclarations]: Found specification of procedure idmouse_disconnect [2022-11-23 14:28:21,320 INFO L138 BoogieDeclarations]: Found implementation of procedure idmouse_disconnect [2022-11-23 14:28:21,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:28:21,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:28:21,321 INFO L130 BoogieDeclarations]: Found specification of procedure idmouse_delete [2022-11-23 14:28:21,321 INFO L138 BoogieDeclarations]: Found implementation of procedure idmouse_delete [2022-11-23 14:28:21,321 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 14:28:21,321 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 14:28:21,321 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-23 14:28:21,321 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-23 14:28:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:28:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 14:28:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-23 14:28:21,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-23 14:28:21,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:28:21,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:28:21,755 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:28:21,758 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:28:21,846 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 14:28:22,109 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-23 14:28:23,322 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:28:23,572 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:28:23,572 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:28:23,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:28:23 BoogieIcfgContainer [2022-11-23 14:28:23,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:28:23,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:28:23,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:28:23,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:28:23,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:28:19" (1/3) ... [2022-11-23 14:28:23,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e286d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:28:23, skipping insertion in model container [2022-11-23 14:28:23,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:20" (2/3) ... [2022-11-23 14:28:23,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e286d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:28:23, skipping insertion in model container [2022-11-23 14:28:23,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:28:23" (3/3) ... [2022-11-23 14:28:23,595 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2022-11-23 14:28:23,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:28:23,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:28:23,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:28:23,700 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=LoopsAndPotentialCycles, 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;@2ee38588, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:28:23,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:28:23,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 276 states, 174 states have (on average 1.4482758620689655) internal successors, (252), 189 states have internal predecessors, (252), 82 states have call successors, (82), 20 states have call predecessors, (82), 18 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) [2022-11-23 14:28:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 14:28:23,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:23,719 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:23,719 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:23,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1559803666, now seen corresponding path program 1 times [2022-11-23 14:28:23,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:23,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099935438] [2022-11-23 14:28:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:23,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:28:24,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:24,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099935438] [2022-11-23 14:28:24,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099935438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:24,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:24,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:28:24,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899526128] [2022-11-23 14:28:24,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:24,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:28:24,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:24,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:28:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:28:24,362 INFO L87 Difference]: Start difference. First operand has 276 states, 174 states have (on average 1.4482758620689655) internal successors, (252), 189 states have internal predecessors, (252), 82 states have call successors, (82), 20 states have call predecessors, (82), 18 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:28:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:24,864 INFO L93 Difference]: Finished difference Result 790 states and 1173 transitions. [2022-11-23 14:28:24,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:28:24,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-11-23 14:28:24,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:24,893 INFO L225 Difference]: With dead ends: 790 [2022-11-23 14:28:24,896 INFO L226 Difference]: Without dead ends: 504 [2022-11-23 14:28:24,906 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 [2022-11-23 14:28:24,917 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 358 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:24,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 767 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:28:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-23 14:28:25,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 501. [2022-11-23 14:28:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 326 states have (on average 1.401840490797546) internal successors, (457), 335 states have internal predecessors, (457), 140 states have call successors, (140), 35 states have call predecessors, (140), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-23 14:28:25,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 731 transitions. [2022-11-23 14:28:25,040 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 731 transitions. Word has length 30 [2022-11-23 14:28:25,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:25,041 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 731 transitions. [2022-11-23 14:28:25,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:28:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 731 transitions. [2022-11-23 14:28:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 14:28:25,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:25,045 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:25,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:28:25,045 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:25,046 INFO L85 PathProgramCache]: Analyzing trace with hash 52553193, now seen corresponding path program 1 times [2022-11-23 14:28:25,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:25,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575007319] [2022-11-23 14:28:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:25,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:25,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:25,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575007319] [2022-11-23 14:28:25,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575007319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:25,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:25,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:28:25,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425527919] [2022-11-23 14:28:25,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:25,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:28:25,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:25,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:28:25,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:28:25,455 INFO L87 Difference]: Start difference. First operand 501 states and 731 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:28:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:25,653 INFO L93 Difference]: Finished difference Result 503 states and 732 transitions. [2022-11-23 14:28:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:28:25,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-11-23 14:28:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:25,658 INFO L225 Difference]: With dead ends: 503 [2022-11-23 14:28:25,658 INFO L226 Difference]: Without dead ends: 500 [2022-11-23 14:28:25,658 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 [2022-11-23 14:28:25,660 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 365 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:25,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 336 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:28:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-11-23 14:28:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2022-11-23 14:28:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 326 states have (on average 1.3987730061349692) internal successors, (456), 334 states have internal predecessors, (456), 139 states have call successors, (139), 35 states have call predecessors, (139), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-23 14:28:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 729 transitions. [2022-11-23 14:28:25,723 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 729 transitions. Word has length 39 [2022-11-23 14:28:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:25,724 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 729 transitions. [2022-11-23 14:28:25,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:28:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 729 transitions. [2022-11-23 14:28:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 14:28:25,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:25,734 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:25,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:28:25,735 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1628939930, now seen corresponding path program 1 times [2022-11-23 14:28:25,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:25,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876072250] [2022-11-23 14:28:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:25,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:26,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:26,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876072250] [2022-11-23 14:28:26,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876072250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:26,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:26,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:28:26,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834071069] [2022-11-23 14:28:26,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:26,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:28:26,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:26,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:28:26,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:28:26,162 INFO L87 Difference]: Start difference. First operand 500 states and 729 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:28:26,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:26,343 INFO L93 Difference]: Finished difference Result 502 states and 730 transitions. [2022-11-23 14:28:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:28:26,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-11-23 14:28:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:26,351 INFO L225 Difference]: With dead ends: 502 [2022-11-23 14:28:26,352 INFO L226 Difference]: Without dead ends: 499 [2022-11-23 14:28:26,353 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 [2022-11-23 14:28:26,359 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 362 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:26,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 334 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:28:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-23 14:28:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2022-11-23 14:28:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 326 states have (on average 1.3957055214723926) internal successors, (455), 333 states have internal predecessors, (455), 138 states have call successors, (138), 35 states have call predecessors, (138), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-23 14:28:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 727 transitions. [2022-11-23 14:28:26,445 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 727 transitions. Word has length 40 [2022-11-23 14:28:26,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:26,446 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 727 transitions. [2022-11-23 14:28:26,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:28:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 727 transitions. [2022-11-23 14:28:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:28:26,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:26,452 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:26,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:28:26,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:26,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1042673908, now seen corresponding path program 1 times [2022-11-23 14:28:26,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:26,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370593482] [2022-11-23 14:28:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:26,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:26,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:26,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370593482] [2022-11-23 14:28:26,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370593482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:26,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:26,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:28:26,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023169652] [2022-11-23 14:28:26,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:26,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:28:26,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:26,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:28:26,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:28:26,589 INFO L87 Difference]: Start difference. First operand 499 states and 727 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:28:26,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:26,794 INFO L93 Difference]: Finished difference Result 501 states and 728 transitions. [2022-11-23 14:28:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:28:26,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-11-23 14:28:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:26,798 INFO L225 Difference]: With dead ends: 501 [2022-11-23 14:28:26,798 INFO L226 Difference]: Without dead ends: 498 [2022-11-23 14:28:26,799 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 [2022-11-23 14:28:26,800 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 359 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:26,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 332 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:28:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-23 14:28:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2022-11-23 14:28:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 326 states have (on average 1.392638036809816) internal successors, (454), 332 states have internal predecessors, (454), 137 states have call successors, (137), 35 states have call predecessors, (137), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-23 14:28:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 725 transitions. [2022-11-23 14:28:26,877 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 725 transitions. Word has length 41 [2022-11-23 14:28:26,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:26,877 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 725 transitions. [2022-11-23 14:28:26,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:28:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 725 transitions. [2022-11-23 14:28:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 14:28:26,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:26,880 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:26,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:28:26,880 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:26,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:26,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2036647901, now seen corresponding path program 1 times [2022-11-23 14:28:26,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:26,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284991116] [2022-11-23 14:28:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:26,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:27,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:27,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284991116] [2022-11-23 14:28:27,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284991116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:27,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:27,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:28:27,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25358393] [2022-11-23 14:28:27,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:27,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:28:27,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:27,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:28:27,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:28:27,083 INFO L87 Difference]: Start difference. First operand 498 states and 725 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:28:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:27,360 INFO L93 Difference]: Finished difference Result 849 states and 1230 transitions. [2022-11-23 14:28:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:28:27,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-11-23 14:28:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:27,366 INFO L225 Difference]: With dead ends: 849 [2022-11-23 14:28:27,366 INFO L226 Difference]: Without dead ends: 846 [2022-11-23 14:28:27,367 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 [2022-11-23 14:28:27,368 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 251 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:27,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 699 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:28:27,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-23 14:28:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 832. [2022-11-23 14:28:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 545 states have (on average 1.3963302752293578) internal successors, (761), 555 states have internal predecessors, (761), 228 states have call successors, (228), 59 states have call predecessors, (228), 58 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-11-23 14:28:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1214 transitions. [2022-11-23 14:28:27,459 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1214 transitions. Word has length 42 [2022-11-23 14:28:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:27,459 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 1214 transitions. [2022-11-23 14:28:27,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:28:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1214 transitions. [2022-11-23 14:28:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 14:28:27,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:27,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:27,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:28:27,462 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:27,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1288618961, now seen corresponding path program 1 times [2022-11-23 14:28:27,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:27,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754652516] [2022-11-23 14:28:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:27,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:27,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:27,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754652516] [2022-11-23 14:28:27,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754652516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:27,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:27,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:28:27,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072711685] [2022-11-23 14:28:27,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:27,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:28:27,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:27,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:28:27,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:28:27,589 INFO L87 Difference]: Start difference. First operand 832 states and 1214 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:28:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:27,790 INFO L93 Difference]: Finished difference Result 834 states and 1215 transitions. [2022-11-23 14:28:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:28:27,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-23 14:28:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:27,795 INFO L225 Difference]: With dead ends: 834 [2022-11-23 14:28:27,796 INFO L226 Difference]: Without dead ends: 825 [2022-11-23 14:28:27,796 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 [2022-11-23 14:28:27,797 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 355 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:27,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 331 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:28:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-11-23 14:28:27,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 825. [2022-11-23 14:28:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 539 states have (on average 1.3933209647495362) internal successors, (751), 548 states have internal predecessors, (751), 227 states have call successors, (227), 59 states have call predecessors, (227), 58 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-11-23 14:28:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1203 transitions. [2022-11-23 14:28:27,886 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1203 transitions. Word has length 43 [2022-11-23 14:28:27,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:27,887 INFO L495 AbstractCegarLoop]: Abstraction has 825 states and 1203 transitions. [2022-11-23 14:28:27,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:28:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1203 transitions. [2022-11-23 14:28:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 14:28:27,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:27,890 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:27,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:28:27,891 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:27,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:27,891 INFO L85 PathProgramCache]: Analyzing trace with hash 185829655, now seen corresponding path program 1 times [2022-11-23 14:28:27,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:27,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656262890] [2022-11-23 14:28:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:27,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:28:28,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:28,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656262890] [2022-11-23 14:28:28,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656262890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:28,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:28,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:28:28,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72768241] [2022-11-23 14:28:28,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:28,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:28:28,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:28,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:28:28,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:28:28,023 INFO L87 Difference]: Start difference. First operand 825 states and 1203 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 14:28:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:28,320 INFO L93 Difference]: Finished difference Result 2096 states and 3016 transitions. [2022-11-23 14:28:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:28:28,320 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 87 [2022-11-23 14:28:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:28,327 INFO L225 Difference]: With dead ends: 2096 [2022-11-23 14:28:28,327 INFO L226 Difference]: Without dead ends: 1279 [2022-11-23 14:28:28,329 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 [2022-11-23 14:28:28,330 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 172 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:28,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 676 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:28:28,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-11-23 14:28:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1271. [2022-11-23 14:28:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 837 states have (on average 1.3859020310633214) internal successors, (1160), 850 states have internal predecessors, (1160), 328 states have call successors, (328), 106 states have call predecessors, (328), 105 states have return successors, (326), 314 states have call predecessors, (326), 326 states have call successors, (326) [2022-11-23 14:28:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1814 transitions. [2022-11-23 14:28:28,450 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1814 transitions. Word has length 87 [2022-11-23 14:28:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:28,450 INFO L495 AbstractCegarLoop]: Abstraction has 1271 states and 1814 transitions. [2022-11-23 14:28:28,450 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 14:28:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1814 transitions. [2022-11-23 14:28:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-23 14:28:28,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:28,454 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:28,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:28:28,454 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:28,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:28,455 INFO L85 PathProgramCache]: Analyzing trace with hash 673434927, now seen corresponding path program 1 times [2022-11-23 14:28:28,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:28,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934240980] [2022-11-23 14:28:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:28,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-23 14:28:28,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:28,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934240980] [2022-11-23 14:28:28,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934240980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:28,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:28,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:28:28,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149833868] [2022-11-23 14:28:28,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:28,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:28:28,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:28,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:28:28,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:28:28,975 INFO L87 Difference]: Start difference. First operand 1271 states and 1814 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 14:28:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:29,494 INFO L93 Difference]: Finished difference Result 3208 states and 4714 transitions. [2022-11-23 14:28:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:28:29,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2022-11-23 14:28:29,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:29,505 INFO L225 Difference]: With dead ends: 3208 [2022-11-23 14:28:29,506 INFO L226 Difference]: Without dead ends: 1951 [2022-11-23 14:28:29,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:28:29,511 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 121 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:29,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1808 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:28:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-11-23 14:28:29,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1287. [2022-11-23 14:28:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 849 states have (on average 1.380447585394582) internal successors, (1172), 862 states have internal predecessors, (1172), 328 states have call successors, (328), 106 states have call predecessors, (328), 109 states have return successors, (338), 318 states have call predecessors, (338), 326 states have call successors, (338) [2022-11-23 14:28:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1838 transitions. [2022-11-23 14:28:29,666 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1838 transitions. Word has length 105 [2022-11-23 14:28:29,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:29,666 INFO L495 AbstractCegarLoop]: Abstraction has 1287 states and 1838 transitions. [2022-11-23 14:28:29,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 14:28:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1838 transitions. [2022-11-23 14:28:29,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 14:28:29,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:29,670 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:29,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:28:29,671 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:29,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:29,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1522578336, now seen corresponding path program 1 times [2022-11-23 14:28:29,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:29,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825981117] [2022-11-23 14:28:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:29,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-23 14:28:30,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:30,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825981117] [2022-11-23 14:28:30,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825981117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:30,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:30,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:28:30,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552137586] [2022-11-23 14:28:30,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:30,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:28:30,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:30,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:28:30,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:28:30,342 INFO L87 Difference]: Start difference. First operand 1287 states and 1838 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 14:28:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:31,349 INFO L93 Difference]: Finished difference Result 3653 states and 5341 transitions. [2022-11-23 14:28:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:28:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 109 [2022-11-23 14:28:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:31,361 INFO L225 Difference]: With dead ends: 3653 [2022-11-23 14:28:31,361 INFO L226 Difference]: Without dead ends: 2380 [2022-11-23 14:28:31,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:28:31,366 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 421 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 2333 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:31,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 2333 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:28:31,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2022-11-23 14:28:31,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1748. [2022-11-23 14:28:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1172 states have (on average 1.3839590443686007) internal successors, (1622), 1195 states have internal predecessors, (1622), 427 states have call successors, (427), 147 states have call predecessors, (427), 148 states have return successors, (443), 405 states have call predecessors, (443), 425 states have call successors, (443) [2022-11-23 14:28:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2492 transitions. [2022-11-23 14:28:31,623 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2492 transitions. Word has length 109 [2022-11-23 14:28:31,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:31,625 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2492 transitions. [2022-11-23 14:28:31,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-23 14:28:31,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2492 transitions. [2022-11-23 14:28:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:28:31,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:31,631 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:31,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:28:31,631 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:31,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:31,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1880436643, now seen corresponding path program 1 times [2022-11-23 14:28:31,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:31,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940623938] [2022-11-23 14:28:31,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:31,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-23 14:28:31,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:31,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940623938] [2022-11-23 14:28:31,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940623938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:31,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:31,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:28:31,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392787654] [2022-11-23 14:28:31,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:31,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:28:31,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:28:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:28:31,843 INFO L87 Difference]: Start difference. First operand 1748 states and 2492 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-23 14:28:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:32,402 INFO L93 Difference]: Finished difference Result 4453 states and 6376 transitions. [2022-11-23 14:28:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:28:32,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 143 [2022-11-23 14:28:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:32,415 INFO L225 Difference]: With dead ends: 4453 [2022-11-23 14:28:32,415 INFO L226 Difference]: Without dead ends: 2719 [2022-11-23 14:28:32,420 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 [2022-11-23 14:28:32,421 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 305 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:32,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 778 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:28:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2022-11-23 14:28:32,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2704. [2022-11-23 14:28:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2704 states, 1879 states have (on average 1.379989356040447) internal successors, (2593), 1908 states have internal predecessors, (2593), 601 states have call successors, (601), 216 states have call predecessors, (601), 223 states have return successors, (623), 579 states have call predecessors, (623), 599 states have call successors, (623) [2022-11-23 14:28:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3817 transitions. [2022-11-23 14:28:32,738 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3817 transitions. Word has length 143 [2022-11-23 14:28:32,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:32,739 INFO L495 AbstractCegarLoop]: Abstraction has 2704 states and 3817 transitions. [2022-11-23 14:28:32,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-23 14:28:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3817 transitions. [2022-11-23 14:28:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:28:32,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:32,746 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:32,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:28:32,746 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:32,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1214239229, now seen corresponding path program 2 times [2022-11-23 14:28:32,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:32,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876979283] [2022-11-23 14:28:32,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:32,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-23 14:28:32,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:32,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876979283] [2022-11-23 14:28:32,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876979283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:32,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:32,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:28:32,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210531012] [2022-11-23 14:28:32,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:32,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:28:32,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:32,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:28:32,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:28:32,873 INFO L87 Difference]: Start difference. First operand 2704 states and 3817 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 14:28:33,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:33,487 INFO L93 Difference]: Finished difference Result 6169 states and 8720 transitions. [2022-11-23 14:28:33,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:28:33,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 143 [2022-11-23 14:28:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:33,507 INFO L225 Difference]: With dead ends: 6169 [2022-11-23 14:28:33,507 INFO L226 Difference]: Without dead ends: 3481 [2022-11-23 14:28:33,514 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 [2022-11-23 14:28:33,515 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 255 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:33,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 739 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:28:33,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2022-11-23 14:28:33,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 3466. [2022-11-23 14:28:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3466 states, 2417 states have (on average 1.3798096814232519) internal successors, (3335), 2452 states have internal predecessors, (3335), 767 states have call successors, (767), 268 states have call predecessors, (767), 281 states have return successors, (795), 745 states have call predecessors, (795), 765 states have call successors, (795) [2022-11-23 14:28:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 4897 transitions. [2022-11-23 14:28:33,949 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 4897 transitions. Word has length 143 [2022-11-23 14:28:33,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:33,950 INFO L495 AbstractCegarLoop]: Abstraction has 3466 states and 4897 transitions. [2022-11-23 14:28:33,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 14:28:33,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 4897 transitions. [2022-11-23 14:28:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:28:33,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:33,959 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:33,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:28:33,959 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:33,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:33,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1288017192, now seen corresponding path program 1 times [2022-11-23 14:28:33,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:33,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228268867] [2022-11-23 14:28:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:33,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-23 14:28:34,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:34,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228268867] [2022-11-23 14:28:34,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228268867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:28:34,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59399711] [2022-11-23 14:28:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:34,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:34,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:28:34,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:28:34,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:28:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:35,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:28:35,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-23 14:28:35,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:28:35,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59399711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:35,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:28:35,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-23 14:28:35,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139255442] [2022-11-23 14:28:35,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:35,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:28:35,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:35,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:28:35,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:28:35,659 INFO L87 Difference]: Start difference. First operand 3466 states and 4897 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-23 14:28:36,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:36,932 INFO L93 Difference]: Finished difference Result 6146 states and 8951 transitions. [2022-11-23 14:28:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:28:36,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 143 [2022-11-23 14:28:36,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:36,971 INFO L225 Difference]: With dead ends: 6146 [2022-11-23 14:28:36,987 INFO L226 Difference]: Without dead ends: 6133 [2022-11-23 14:28:36,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:28:36,991 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 354 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:36,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 1063 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:28:36,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2022-11-23 14:28:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 4553. [2022-11-23 14:28:37,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 3170 states have (on average 1.3769716088328077) internal successors, (4365), 3215 states have internal predecessors, (4365), 1006 states have call successors, (1006), 357 states have call predecessors, (1006), 376 states have return successors, (1044), 980 states have call predecessors, (1044), 1004 states have call successors, (1044) [2022-11-23 14:28:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6415 transitions. [2022-11-23 14:28:37,604 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6415 transitions. Word has length 143 [2022-11-23 14:28:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:37,605 INFO L495 AbstractCegarLoop]: Abstraction has 4553 states and 6415 transitions. [2022-11-23 14:28:37,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-23 14:28:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6415 transitions. [2022-11-23 14:28:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-23 14:28:37,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:37,617 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:37,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:37,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:37,827 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1081268659, now seen corresponding path program 1 times [2022-11-23 14:28:37,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533570837] [2022-11-23 14:28:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:37,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-23 14:28:38,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:38,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533570837] [2022-11-23 14:28:38,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533570837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:38,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:38,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:28:38,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623761096] [2022-11-23 14:28:38,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:38,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:28:38,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:28:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:28:38,137 INFO L87 Difference]: Start difference. First operand 4553 states and 6415 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-23 14:28:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:39,493 INFO L93 Difference]: Finished difference Result 9380 states and 13828 transitions. [2022-11-23 14:28:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:28:39,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 158 [2022-11-23 14:28:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:39,555 INFO L225 Difference]: With dead ends: 9380 [2022-11-23 14:28:39,556 INFO L226 Difference]: Without dead ends: 7876 [2022-11-23 14:28:39,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:28:39,565 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 423 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:39,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1682 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:28:39,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2022-11-23 14:28:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 4565. [2022-11-23 14:28:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 3182 states have (on average 1.3755499685732244) internal successors, (4377), 3227 states have internal predecessors, (4377), 1006 states have call successors, (1006), 357 states have call predecessors, (1006), 376 states have return successors, (1044), 980 states have call predecessors, (1044), 1004 states have call successors, (1044) [2022-11-23 14:28:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 6427 transitions. [2022-11-23 14:28:40,254 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 6427 transitions. Word has length 158 [2022-11-23 14:28:40,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:40,255 INFO L495 AbstractCegarLoop]: Abstraction has 4565 states and 6427 transitions. [2022-11-23 14:28:40,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-23 14:28:40,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 6427 transitions. [2022-11-23 14:28:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-23 14:28:40,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:40,268 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:40,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:28:40,268 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:40,269 INFO L85 PathProgramCache]: Analyzing trace with hash 746211536, now seen corresponding path program 1 times [2022-11-23 14:28:40,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:40,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220943240] [2022-11-23 14:28:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:40,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-23 14:28:40,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:40,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220943240] [2022-11-23 14:28:40,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220943240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:40,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:40,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:28:40,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794211884] [2022-11-23 14:28:40,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:40,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:28:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:40,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:28:40,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:28:40,613 INFO L87 Difference]: Start difference. First operand 4565 states and 6427 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 14:28:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:42,351 INFO L93 Difference]: Finished difference Result 10888 states and 16208 transitions. [2022-11-23 14:28:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:28:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 162 [2022-11-23 14:28:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:42,389 INFO L225 Difference]: With dead ends: 10888 [2022-11-23 14:28:42,389 INFO L226 Difference]: Without dead ends: 9372 [2022-11-23 14:28:42,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:28:42,423 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 960 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:42,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 2446 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:28:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2022-11-23 14:28:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 4631. [2022-11-23 14:28:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 3230 states have (on average 1.3773993808049536) internal successors, (4449), 3275 states have internal predecessors, (4449), 1024 states have call successors, (1024), 357 states have call predecessors, (1024), 376 states have return successors, (1062), 998 states have call predecessors, (1062), 1022 states have call successors, (1062) [2022-11-23 14:28:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 6535 transitions. [2022-11-23 14:28:43,173 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 6535 transitions. Word has length 162 [2022-11-23 14:28:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:43,174 INFO L495 AbstractCegarLoop]: Abstraction has 4631 states and 6535 transitions. [2022-11-23 14:28:43,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 14:28:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 6535 transitions. [2022-11-23 14:28:43,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-23 14:28:43,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:43,188 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:43,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:28:43,188 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1823121226, now seen corresponding path program 1 times [2022-11-23 14:28:43,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:43,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947489320] [2022-11-23 14:28:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:43,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 14:28:43,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:43,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947489320] [2022-11-23 14:28:43,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947489320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:28:43,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094925886] [2022-11-23 14:28:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:43,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:43,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:28:43,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:28:43,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:28:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:44,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:28:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-23 14:28:45,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:28:45,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094925886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:45,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:28:45,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-23 14:28:45,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766967218] [2022-11-23 14:28:45,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:45,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:28:45,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:45,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:28:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:28:45,105 INFO L87 Difference]: Start difference. First operand 4631 states and 6535 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 14:28:46,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:46,444 INFO L93 Difference]: Finished difference Result 6201 states and 8778 transitions. [2022-11-23 14:28:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:28:46,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 173 [2022-11-23 14:28:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:46,465 INFO L225 Difference]: With dead ends: 6201 [2022-11-23 14:28:46,466 INFO L226 Difference]: Without dead ends: 4619 [2022-11-23 14:28:46,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:28:46,473 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 365 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:46,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 587 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:28:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4619 states. [2022-11-23 14:28:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4619 to 4619. [2022-11-23 14:28:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 3224 states have (on average 1.376240694789082) internal successors, (4437), 3269 states have internal predecessors, (4437), 1018 states have call successors, (1018), 357 states have call predecessors, (1018), 376 states have return successors, (1056), 992 states have call predecessors, (1056), 1016 states have call successors, (1056) [2022-11-23 14:28:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 6511 transitions. [2022-11-23 14:28:47,035 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 6511 transitions. Word has length 173 [2022-11-23 14:28:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:47,036 INFO L495 AbstractCegarLoop]: Abstraction has 4619 states and 6511 transitions. [2022-11-23 14:28:47,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 14:28:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 6511 transitions. [2022-11-23 14:28:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-23 14:28:47,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:47,083 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:47,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:47,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:28:47,291 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash 652289350, now seen corresponding path program 1 times [2022-11-23 14:28:47,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:47,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325275296] [2022-11-23 14:28:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:47,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 14:28:47,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:47,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325275296] [2022-11-23 14:28:47,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325275296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:28:47,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349740989] [2022-11-23 14:28:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:47,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:47,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:28:47,959 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:28:47,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:28:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:48,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:28:48,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-23 14:28:48,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:28:48,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349740989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:48,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:28:48,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-11-23 14:28:48,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018376624] [2022-11-23 14:28:48,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:48,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:28:48,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:48,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:28:48,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:28:48,883 INFO L87 Difference]: Start difference. First operand 4619 states and 6511 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-11-23 14:28:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:55,937 INFO L93 Difference]: Finished difference Result 28414 states and 42746 transitions. [2022-11-23 14:28:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 14:28:55,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 173 [2022-11-23 14:28:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:56,059 INFO L225 Difference]: With dead ends: 28414 [2022-11-23 14:28:56,059 INFO L226 Difference]: Without dead ends: 28406 [2022-11-23 14:28:56,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:28:56,069 INFO L413 NwaCegarLoop]: 1064 mSDtfsCounter, 2170 mSDsluCounter, 3039 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2277 SdHoareTripleChecker+Valid, 4103 SdHoareTripleChecker+Invalid, 4036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:56,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2277 Valid, 4103 Invalid, 4036 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [651 Valid, 3385 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-23 14:28:56,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28406 states. [2022-11-23 14:28:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28406 to 12508. [2022-11-23 14:28:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12508 states, 8763 states have (on average 1.3847997261211913) internal successors, (12135), 8932 states have internal predecessors, (12135), 2757 states have call successors, (2757), 928 states have call predecessors, (2757), 987 states have return successors, (2865), 2647 states have call predecessors, (2865), 2755 states have call successors, (2865) [2022-11-23 14:28:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12508 states to 12508 states and 17757 transitions. [2022-11-23 14:28:57,749 INFO L78 Accepts]: Start accepts. Automaton has 12508 states and 17757 transitions. Word has length 173 [2022-11-23 14:28:57,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:57,750 INFO L495 AbstractCegarLoop]: Abstraction has 12508 states and 17757 transitions. [2022-11-23 14:28:57,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-11-23 14:28:57,750 INFO L276 IsEmpty]: Start isEmpty. Operand 12508 states and 17757 transitions. [2022-11-23 14:28:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-23 14:28:57,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:57,782 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:28:57,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:57,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:28:57,991 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash -752325361, now seen corresponding path program 1 times [2022-11-23 14:28:57,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:28:57,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748321307] [2022-11-23 14:28:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:57,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:28:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-23 14:28:58,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:28:58,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748321307] [2022-11-23 14:28:58,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748321307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:28:58,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634466171] [2022-11-23 14:28:58,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:58,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:58,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:28:58,530 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:28:58,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:28:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:59,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2034 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:28:59,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 14:28:59,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:28:59,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634466171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:59,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:28:59,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-23 14:28:59,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035310015] [2022-11-23 14:28:59,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:59,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:28:59,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:59,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:28:59,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:28:59,315 INFO L87 Difference]: Start difference. First operand 12508 states and 17757 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-23 14:29:00,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:00,214 INFO L93 Difference]: Finished difference Result 19250 states and 27357 transitions. [2022-11-23 14:29:00,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:29:00,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 182 [2022-11-23 14:29:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:00,242 INFO L225 Difference]: With dead ends: 19250 [2022-11-23 14:29:00,242 INFO L226 Difference]: Without dead ends: 5473 [2022-11-23 14:29:00,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:29:00,271 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 230 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:00,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 597 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:29:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2022-11-23 14:29:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4925. [2022-11-23 14:29:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4925 states, 3416 states have (on average 1.3659250585480094) internal successors, (4666), 3488 states have internal predecessors, (4666), 1121 states have call successors, (1121), 365 states have call predecessors, (1121), 387 states have return successors, (1167), 1071 states have call predecessors, (1167), 1119 states have call successors, (1167) [2022-11-23 14:29:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4925 states to 4925 states and 6954 transitions. [2022-11-23 14:29:00,940 INFO L78 Accepts]: Start accepts. Automaton has 4925 states and 6954 transitions. Word has length 182 [2022-11-23 14:29:00,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:00,941 INFO L495 AbstractCegarLoop]: Abstraction has 4925 states and 6954 transitions. [2022-11-23 14:29:00,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-23 14:29:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 4925 states and 6954 transitions. [2022-11-23 14:29:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-23 14:29:00,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:00,959 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:00,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:01,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 14:29:01,170 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash 996838588, now seen corresponding path program 1 times [2022-11-23 14:29:01,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:01,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680805900] [2022-11-23 14:29:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:01,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-23 14:29:01,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:01,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680805900] [2022-11-23 14:29:01,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680805900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:29:01,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:29:01,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:29:01,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121905858] [2022-11-23 14:29:01,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:01,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:29:01,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:01,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:29:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:29:01,386 INFO L87 Difference]: Start difference. First operand 4925 states and 6954 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-23 14:29:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:02,363 INFO L93 Difference]: Finished difference Result 11004 states and 15497 transitions. [2022-11-23 14:29:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:29:02,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 182 [2022-11-23 14:29:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:02,393 INFO L225 Difference]: With dead ends: 11004 [2022-11-23 14:29:02,394 INFO L226 Difference]: Without dead ends: 6733 [2022-11-23 14:29:02,408 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 [2022-11-23 14:29:02,409 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 297 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:02,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 650 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:29:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6733 states. [2022-11-23 14:29:03,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6733 to 6703. [2022-11-23 14:29:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6703 states, 4756 states have (on average 1.3637510513036164) internal successors, (6486), 4847 states have internal predecessors, (6486), 1385 states have call successors, (1385), 541 states have call predecessors, (1385), 561 states have return successors, (1431), 1314 states have call predecessors, (1431), 1383 states have call successors, (1431) [2022-11-23 14:29:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 9302 transitions. [2022-11-23 14:29:03,685 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 9302 transitions. Word has length 182 [2022-11-23 14:29:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:03,686 INFO L495 AbstractCegarLoop]: Abstraction has 6703 states and 9302 transitions. [2022-11-23 14:29:03,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-23 14:29:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 9302 transitions. [2022-11-23 14:29:03,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-23 14:29:03,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:03,717 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:03,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 14:29:03,718 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:03,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:03,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1253172053, now seen corresponding path program 1 times [2022-11-23 14:29:03,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:03,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677184113] [2022-11-23 14:29:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:03,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-23 14:29:04,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:04,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677184113] [2022-11-23 14:29:04,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677184113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:29:04,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:29:04,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:29:04,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754419886] [2022-11-23 14:29:04,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:04,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:29:04,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:04,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:29:04,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:29:04,624 INFO L87 Difference]: Start difference. First operand 6703 states and 9302 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-23 14:29:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:09,120 INFO L93 Difference]: Finished difference Result 25630 states and 37016 transitions. [2022-11-23 14:29:09,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:29:09,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 188 [2022-11-23 14:29:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:09,215 INFO L225 Difference]: With dead ends: 25630 [2022-11-23 14:29:09,215 INFO L226 Difference]: Without dead ends: 18943 [2022-11-23 14:29:09,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:29:09,239 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 1714 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:09,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1794 Valid, 2107 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 14:29:09,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18943 states. [2022-11-23 14:29:10,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18943 to 10339. [2022-11-23 14:29:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 7403 states have (on average 1.3716061056328515) internal successors, (10154), 7536 states have internal predecessors, (10154), 2082 states have call successors, (2082), 810 states have call predecessors, (2082), 853 states have return successors, (2146), 1992 states have call predecessors, (2146), 2080 states have call successors, (2146) [2022-11-23 14:29:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 14382 transitions. [2022-11-23 14:29:10,828 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 14382 transitions. Word has length 188 [2022-11-23 14:29:10,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:10,829 INFO L495 AbstractCegarLoop]: Abstraction has 10339 states and 14382 transitions. [2022-11-23 14:29:10,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-23 14:29:10,829 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 14382 transitions. [2022-11-23 14:29:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-23 14:29:10,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:10,863 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:10,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 14:29:10,864 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash 291854258, now seen corresponding path program 2 times [2022-11-23 14:29:10,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:10,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064852326] [2022-11-23 14:29:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:10,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-23 14:29:11,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:11,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064852326] [2022-11-23 14:29:11,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064852326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:11,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691112293] [2022-11-23 14:29:11,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:29:11,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:11,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:11,853 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:11,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:29:12,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:29:12,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:29:12,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:29:12,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-23 14:29:12,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-23 14:29:13,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691112293] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:13,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:29:13,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7] total 17 [2022-11-23 14:29:13,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137243578] [2022-11-23 14:29:13,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:13,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:29:13,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:13,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:29:13,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:29:13,130 INFO L87 Difference]: Start difference. First operand 10339 states and 14382 transitions. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 4 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-23 14:29:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:16,903 INFO L93 Difference]: Finished difference Result 26791 states and 38200 transitions. [2022-11-23 14:29:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:29:16,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 4 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 182 [2022-11-23 14:29:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:16,976 INFO L225 Difference]: With dead ends: 26791 [2022-11-23 14:29:16,976 INFO L226 Difference]: Without dead ends: 17343 [2022-11-23 14:29:17,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2022-11-23 14:29:17,004 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 1040 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:17,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 1534 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 14:29:17,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17343 states. [2022-11-23 14:29:18,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17343 to 11231. [2022-11-23 14:29:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11231 states, 8302 states have (on average 1.376053962900506) internal successors, (11424), 8411 states have internal predecessors, (11424), 2037 states have call successors, (2037), 850 states have call predecessors, (2037), 891 states have return successors, (2097), 1969 states have call predecessors, (2097), 2035 states have call successors, (2097) [2022-11-23 14:29:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11231 states to 11231 states and 15558 transitions. [2022-11-23 14:29:18,564 INFO L78 Accepts]: Start accepts. Automaton has 11231 states and 15558 transitions. Word has length 182 [2022-11-23 14:29:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:18,565 INFO L495 AbstractCegarLoop]: Abstraction has 11231 states and 15558 transitions. [2022-11-23 14:29:18,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 4 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-23 14:29:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 11231 states and 15558 transitions. [2022-11-23 14:29:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-23 14:29:18,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:18,593 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:18,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:18,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:18,807 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:18,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:18,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1100118070, now seen corresponding path program 1 times [2022-11-23 14:29:18,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:18,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639628712] [2022-11-23 14:29:18,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:18,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-23 14:29:19,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:19,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639628712] [2022-11-23 14:29:19,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639628712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:19,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990209781] [2022-11-23 14:29:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:19,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:19,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:19,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:19,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:29:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 2029 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-23 14:29:20,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-23 14:29:20,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:29:20,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990209781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:29:20,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:29:20,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-23 14:29:20,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602624092] [2022-11-23 14:29:20,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:20,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:29:20,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:20,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:29:20,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:29:20,905 INFO L87 Difference]: Start difference. First operand 11231 states and 15558 transitions. Second operand has 8 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-23 14:29:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:24,472 INFO L93 Difference]: Finished difference Result 31225 states and 43704 transitions. [2022-11-23 14:29:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:29:24,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 188 [2022-11-23 14:29:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:24,633 INFO L225 Difference]: With dead ends: 31225 [2022-11-23 14:29:24,633 INFO L226 Difference]: Without dead ends: 21330 [2022-11-23 14:29:24,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:29:24,656 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 767 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:24,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 1742 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 14:29:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21330 states. [2022-11-23 14:29:26,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21330 to 17878. [2022-11-23 14:29:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17878 states, 13588 states have (on average 1.3843832793641448) internal successors, (18811), 13787 states have internal predecessors, (18811), 2932 states have call successors, (2932), 1333 states have call predecessors, (2932), 1357 states have return successors, (3035), 2757 states have call predecessors, (3035), 2930 states have call successors, (3035) [2022-11-23 14:29:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17878 states to 17878 states and 24778 transitions. [2022-11-23 14:29:26,722 INFO L78 Accepts]: Start accepts. Automaton has 17878 states and 24778 transitions. Word has length 188 [2022-11-23 14:29:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:26,722 INFO L495 AbstractCegarLoop]: Abstraction has 17878 states and 24778 transitions. [2022-11-23 14:29:26,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-23 14:29:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 17878 states and 24778 transitions. [2022-11-23 14:29:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-23 14:29:26,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:26,744 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:26,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:26,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 14:29:26,954 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1900379957, now seen corresponding path program 1 times [2022-11-23 14:29:26,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:26,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297648142] [2022-11-23 14:29:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:26,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-23 14:29:27,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:27,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297648142] [2022-11-23 14:29:27,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297648142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:27,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350006271] [2022-11-23 14:29:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:27,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:27,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:27,915 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:27,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:29:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:28,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:29:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-23 14:29:28,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-23 14:29:29,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350006271] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:29,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:29:29,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 8] total 16 [2022-11-23 14:29:29,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979325848] [2022-11-23 14:29:29,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:29,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:29:29,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:29,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:29:29,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:29:29,308 INFO L87 Difference]: Start difference. First operand 17878 states and 24778 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 5 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-23 14:29:35,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:35,507 INFO L93 Difference]: Finished difference Result 42021 states and 60484 transitions. [2022-11-23 14:29:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 14:29:35,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 5 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 186 [2022-11-23 14:29:35,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:35,606 INFO L225 Difference]: With dead ends: 42021 [2022-11-23 14:29:35,607 INFO L226 Difference]: Without dead ends: 34027 [2022-11-23 14:29:35,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 368 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:29:35,628 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 1319 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:35,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1363 Valid, 2037 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 14:29:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34027 states. [2022-11-23 14:29:37,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34027 to 17850. [2022-11-23 14:29:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17850 states, 13560 states have (on average 1.3851769911504426) internal successors, (18783), 13759 states have internal predecessors, (18783), 2932 states have call successors, (2932), 1333 states have call predecessors, (2932), 1357 states have return successors, (3035), 2757 states have call predecessors, (3035), 2930 states have call successors, (3035) [2022-11-23 14:29:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17850 states to 17850 states and 24750 transitions. [2022-11-23 14:29:37,896 INFO L78 Accepts]: Start accepts. Automaton has 17850 states and 24750 transitions. Word has length 186 [2022-11-23 14:29:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:37,897 INFO L495 AbstractCegarLoop]: Abstraction has 17850 states and 24750 transitions. [2022-11-23 14:29:37,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 5 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-23 14:29:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 17850 states and 24750 transitions. [2022-11-23 14:29:37,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-23 14:29:37,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:37,921 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:37,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:38,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:38,131 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:38,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1850243766, now seen corresponding path program 1 times [2022-11-23 14:29:38,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:38,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653297833] [2022-11-23 14:29:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:38,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-23 14:29:38,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653297833] [2022-11-23 14:29:38,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653297833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743699372] [2022-11-23 14:29:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:38,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:38,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:38,890 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:38,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:29:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:39,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 2390 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:29:39,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-23 14:29:39,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:29:39,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743699372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:29:39,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:29:39,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-23 14:29:39,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132909529] [2022-11-23 14:29:39,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:39,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:29:39,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:39,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:29:39,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:29:39,974 INFO L87 Difference]: Start difference. First operand 17850 states and 24750 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-23 14:29:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:44,391 INFO L93 Difference]: Finished difference Result 31211 states and 44347 transitions. [2022-11-23 14:29:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:29:44,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 208 [2022-11-23 14:29:44,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:44,481 INFO L225 Difference]: With dead ends: 31211 [2022-11-23 14:29:44,481 INFO L226 Difference]: Without dead ends: 31208 [2022-11-23 14:29:44,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:29:44,494 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 651 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:44,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 837 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:29:44,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31208 states. [2022-11-23 14:29:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31208 to 17849. [2022-11-23 14:29:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17849 states, 13560 states have (on average 1.3841445427728614) internal successors, (18769), 13758 states have internal predecessors, (18769), 2931 states have call successors, (2931), 1333 states have call predecessors, (2931), 1357 states have return successors, (3035), 2757 states have call predecessors, (3035), 2930 states have call successors, (3035) [2022-11-23 14:29:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 24735 transitions. [2022-11-23 14:29:46,900 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 24735 transitions. Word has length 208 [2022-11-23 14:29:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:46,901 INFO L495 AbstractCegarLoop]: Abstraction has 17849 states and 24735 transitions. [2022-11-23 14:29:46,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-23 14:29:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 24735 transitions. [2022-11-23 14:29:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-23 14:29:46,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:46,916 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:46,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:47,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:47,117 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1921492187, now seen corresponding path program 1 times [2022-11-23 14:29:47,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:47,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217521393] [2022-11-23 14:29:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:47,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-23 14:29:47,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217521393] [2022-11-23 14:29:47,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217521393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201172333] [2022-11-23 14:29:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:47,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:47,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:47,776 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:47,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:29:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:29:48,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 14:29:48,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:29:48,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201172333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:29:48,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:29:48,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-23 14:29:48,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216745684] [2022-11-23 14:29:48,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:48,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:29:48,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:48,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:29:48,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:29:48,643 INFO L87 Difference]: Start difference. First operand 17849 states and 24735 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-23 14:29:52,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:52,149 INFO L93 Difference]: Finished difference Result 40174 states and 56145 transitions. [2022-11-23 14:29:52,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:29:52,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 207 [2022-11-23 14:29:52,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:52,195 INFO L225 Difference]: With dead ends: 40174 [2022-11-23 14:29:52,195 INFO L226 Difference]: Without dead ends: 22713 [2022-11-23 14:29:52,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:29:52,226 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 419 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:52,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 1773 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:29:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22713 states. [2022-11-23 14:29:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22713 to 19643. [2022-11-23 14:29:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19643 states, 14998 states have (on average 1.3837845046006134) internal successors, (20754), 15206 states have internal predecessors, (20754), 3154 states have call successors, (3154), 1458 states have call predecessors, (3154), 1490 states have return successors, (3266), 2978 states have call predecessors, (3266), 3153 states have call successors, (3266) [2022-11-23 14:29:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19643 states to 19643 states and 27174 transitions. [2022-11-23 14:29:54,664 INFO L78 Accepts]: Start accepts. Automaton has 19643 states and 27174 transitions. Word has length 207 [2022-11-23 14:29:54,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:54,665 INFO L495 AbstractCegarLoop]: Abstraction has 19643 states and 27174 transitions. [2022-11-23 14:29:54,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-23 14:29:54,665 INFO L276 IsEmpty]: Start isEmpty. Operand 19643 states and 27174 transitions. [2022-11-23 14:29:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-23 14:29:54,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:54,687 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:54,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:54,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 14:29:54,898 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:54,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:54,899 INFO L85 PathProgramCache]: Analyzing trace with hash -938764311, now seen corresponding path program 1 times [2022-11-23 14:29:54,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:54,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863773863] [2022-11-23 14:29:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:54,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-23 14:29:55,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:55,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863773863] [2022-11-23 14:29:55,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863773863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:55,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441296560] [2022-11-23 14:29:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:55,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:55,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:55,612 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:55,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:29:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:56,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-23 14:29:56,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 14:29:56,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-23 14:29:57,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441296560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:57,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1421409609] [2022-11-23 14:29:57,541 INFO L159 IcfgInterpreter]: Started Sifa with 146 locations of interest [2022-11-23 14:29:57,541 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:29:57,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:29:57,552 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:29:57,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:30:15,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:16,429 INFO L321 Elim1Store]: treesize reduction 250, result has 47.5 percent of original size [2022-11-23 14:30:16,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 26 select indices, 26 select index equivalence classes, 327 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 25 case distinctions, treesize of input 137 treesize of output 314 [2022-11-23 14:30:16,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:17,576 INFO L321 Elim1Store]: treesize reduction 450, result has 33.4 percent of original size [2022-11-23 14:30:17,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 28 select indices, 28 select index equivalence classes, 353 disjoint index pairs (out of 378 index pairs), introduced 28 new quantified variables, introduced 50 case distinctions, treesize of input 147 treesize of output 325 [2022-11-23 14:30:20,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 85 select indices, 85 select index equivalence classes, 879 disjoint index pairs (out of 3570 index pairs), introduced 85 new quantified variables, introduced 0 case distinctions, treesize of input 710 treesize of output 256 [2022-11-23 14:30:20,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 27 select indices, 27 select index equivalence classes, 352 disjoint index pairs (out of 351 index pairs), introduced 27 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 82 [2022-11-23 14:30:20,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:20,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 28 select indices, 28 select index equivalence classes, 378 disjoint index pairs (out of 378 index pairs), introduced 28 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 85 [2022-11-23 14:30:22,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 85 select indices, 85 select index equivalence classes, 879 disjoint index pairs (out of 3570 index pairs), introduced 85 new quantified variables, introduced 0 case distinctions, treesize of input 710 treesize of output 256 [2022-11-23 14:30:22,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 27 select indices, 27 select index equivalence classes, 352 disjoint index pairs (out of 351 index pairs), introduced 27 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 82 [2022-11-23 14:30:22,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:30:22,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 28 select indices, 28 select index equivalence classes, 378 disjoint index pairs (out of 378 index pairs), introduced 28 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 85 [2022-11-23 14:30:29,405 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 130 for LOIs [2022-11-23 14:30:29,442 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:30:44,817 WARN L233 SmtUtils]: Spent 14.96s on a formula simplification. DAG size of input: 1041 DAG size of output: 989 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:30:52,733 WARN L233 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 652 DAG size of output: 649 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:30:59,883 WARN L233 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 656 DAG size of output: 653 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:31:07,381 WARN L233 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 664 DAG size of output: 658 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:31:15,667 WARN L233 SmtUtils]: Spent 7.85s on a formula simplification. DAG size of input: 690 DAG size of output: 684 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:31:24,210 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 707 DAG size of output: 690 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:31:33,135 WARN L233 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 721 DAG size of output: 704 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:31:33,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1421409609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:31:33,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:31:33,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 10, 8] total 30 [2022-11-23 14:31:33,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373970893] [2022-11-23 14:31:33,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:31:33,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 14:31:33,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:31:33,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 14:31:33,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:31:33,148 INFO L87 Difference]: Start difference. First operand 19643 states and 27174 transitions. Second operand has 12 states, 9 states have (on average 11.777777777777779) internal successors, (106), 7 states have internal predecessors, (106), 4 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-23 14:31:40,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:31:40,839 INFO L93 Difference]: Finished difference Result 39290 states and 54358 transitions. [2022-11-23 14:31:40,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:31:40,840 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 11.777777777777779) internal successors, (106), 7 states have internal predecessors, (106), 4 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 207 [2022-11-23 14:31:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:31:40,957 INFO L225 Difference]: With dead ends: 39290 [2022-11-23 14:31:40,957 INFO L226 Difference]: Without dead ends: 19663 [2022-11-23 14:31:40,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 64.0s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:31:40,990 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 17 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:31:40,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1345 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-23 14:31:41,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19663 states. [2022-11-23 14:31:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19663 to 19659. [2022-11-23 14:31:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19659 states, 15008 states have (on average 1.3835954157782515) internal successors, (20765), 15216 states have internal predecessors, (20765), 3158 states have call successors, (3158), 1459 states have call predecessors, (3158), 1492 states have return successors, (3274), 2983 states have call predecessors, (3274), 3157 states have call successors, (3274) [2022-11-23 14:31:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19659 states to 19659 states and 27197 transitions. [2022-11-23 14:31:43,812 INFO L78 Accepts]: Start accepts. Automaton has 19659 states and 27197 transitions. Word has length 207 [2022-11-23 14:31:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:31:43,812 INFO L495 AbstractCegarLoop]: Abstraction has 19659 states and 27197 transitions. [2022-11-23 14:31:43,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 11.777777777777779) internal successors, (106), 7 states have internal predecessors, (106), 4 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-23 14:31:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 19659 states and 27197 transitions. [2022-11-23 14:31:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-23 14:31:43,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:31:43,830 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:31:43,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:31:44,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 14:31:44,047 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:31:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:31:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1990026330, now seen corresponding path program 1 times [2022-11-23 14:31:44,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:31:44,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480446908] [2022-11-23 14:31:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:31:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:31:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:31:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 14:31:44,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:31:44,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480446908] [2022-11-23 14:31:44,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480446908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:31:44,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250603500] [2022-11-23 14:31:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:31:44,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:31:44,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:31:44,771 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:31:44,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:31:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:31:45,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 2169 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 14:31:45,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:31:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-23 14:31:45,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:31:45,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250603500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:31:45,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:31:45,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-23 14:31:45,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657176220] [2022-11-23 14:31:45,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:31:45,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:31:45,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:31:45,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:31:45,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:31:45,929 INFO L87 Difference]: Start difference. First operand 19659 states and 27197 transitions. Second operand has 8 states, 7 states have (on average 16.714285714285715) internal successors, (117), 5 states have internal predecessors, (117), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 14:31:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:31:50,387 INFO L93 Difference]: Finished difference Result 44128 states and 61498 transitions. [2022-11-23 14:31:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:31:50,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.714285714285715) internal successors, (117), 5 states have internal predecessors, (117), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) Word has length 208 [2022-11-23 14:31:50,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:31:50,436 INFO L225 Difference]: With dead ends: 44128 [2022-11-23 14:31:50,436 INFO L226 Difference]: Without dead ends: 24515 [2022-11-23 14:31:50,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:31:50,460 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 515 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:31:50,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1914 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:31:50,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24515 states. [2022-11-23 14:31:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24515 to 19987. [2022-11-23 14:31:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19987 states, 15232 states have (on average 1.3779543067226891) internal successors, (20989), 15424 states have internal predecessors, (20989), 3158 states have call successors, (3158), 1459 states have call predecessors, (3158), 1596 states have return successors, (3482), 3103 states have call predecessors, (3482), 3157 states have call successors, (3482) [2022-11-23 14:31:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19987 states to 19987 states and 27629 transitions. [2022-11-23 14:31:53,769 INFO L78 Accepts]: Start accepts. Automaton has 19987 states and 27629 transitions. Word has length 208 [2022-11-23 14:31:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:31:53,770 INFO L495 AbstractCegarLoop]: Abstraction has 19987 states and 27629 transitions. [2022-11-23 14:31:53,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.714285714285715) internal successors, (117), 5 states have internal predecessors, (117), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 14:31:53,770 INFO L276 IsEmpty]: Start isEmpty. Operand 19987 states and 27629 transitions. [2022-11-23 14:31:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-23 14:31:53,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:31:53,784 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:31:53,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:31:53,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 14:31:53,985 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:31:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:31:53,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1196121099, now seen corresponding path program 2 times [2022-11-23 14:31:53,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:31:53,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525762723] [2022-11-23 14:31:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:31:53,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:31:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:31:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-23 14:31:54,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:31:54,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525762723] [2022-11-23 14:31:54,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525762723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:31:54,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749301887] [2022-11-23 14:31:54,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:31:54,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:31:54,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:31:54,823 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:31:54,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:31:55,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:31:55,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:31:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1925 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:31:55,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:31:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 14:31:56,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:31:56,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749301887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:31:56,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:31:56,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-11-23 14:31:56,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282116863] [2022-11-23 14:31:56,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:31:56,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:31:56,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:31:56,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:31:56,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:31:56,284 INFO L87 Difference]: Start difference. First operand 19987 states and 27629 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 5 states have internal predecessors, (117), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-23 14:32:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:00,293 INFO L93 Difference]: Finished difference Result 29028 states and 40366 transitions. [2022-11-23 14:32:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:32:00,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 5 states have internal predecessors, (117), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) Word has length 212 [2022-11-23 14:32:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:00,345 INFO L225 Difference]: With dead ends: 29028 [2022-11-23 14:32:00,345 INFO L226 Difference]: Without dead ends: 20004 [2022-11-23 14:32:00,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:32:00,361 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 356 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:00,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1138 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:32:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20004 states. [2022-11-23 14:32:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20004 to 20004. [2022-11-23 14:32:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20004 states, 15249 states have (on average 1.3775329529805234) internal successors, (21006), 15441 states have internal predecessors, (21006), 3158 states have call successors, (3158), 1459 states have call predecessors, (3158), 1596 states have return successors, (3482), 3103 states have call predecessors, (3482), 3157 states have call successors, (3482) [2022-11-23 14:32:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20004 states to 20004 states and 27646 transitions. [2022-11-23 14:32:03,384 INFO L78 Accepts]: Start accepts. Automaton has 20004 states and 27646 transitions. Word has length 212 [2022-11-23 14:32:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:03,385 INFO L495 AbstractCegarLoop]: Abstraction has 20004 states and 27646 transitions. [2022-11-23 14:32:03,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 5 states have internal predecessors, (117), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-23 14:32:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 20004 states and 27646 transitions. [2022-11-23 14:32:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-23 14:32:03,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:03,401 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:03,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:03,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:03,616 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:03,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:03,616 INFO L85 PathProgramCache]: Analyzing trace with hash 142501473, now seen corresponding path program 1 times [2022-11-23 14:32:03,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:03,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066216739] [2022-11-23 14:32:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:03,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-23 14:32:04,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:04,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066216739] [2022-11-23 14:32:04,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066216739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:04,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361568205] [2022-11-23 14:32:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:04,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:04,431 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:04,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:32:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:05,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 2289 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:32:05,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 14:32:05,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-23 14:32:05,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361568205] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:05,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:32:05,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 9 [2022-11-23 14:32:05,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339924193] [2022-11-23 14:32:05,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:05,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:32:05,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:05,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:32:05,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:32:05,390 INFO L87 Difference]: Start difference. First operand 20004 states and 27646 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 14:32:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:08,856 INFO L93 Difference]: Finished difference Result 29028 states and 40349 transitions. [2022-11-23 14:32:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:32:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 213 [2022-11-23 14:32:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:08,914 INFO L225 Difference]: With dead ends: 29028 [2022-11-23 14:32:08,915 INFO L226 Difference]: Without dead ends: 20021 [2022-11-23 14:32:08,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:32:08,935 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 4 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:08,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 953 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:32:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20021 states. [2022-11-23 14:32:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20021 to 20021. [2022-11-23 14:32:12,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20021 states, 15266 states have (on average 1.3771125376654003) internal successors, (21023), 15458 states have internal predecessors, (21023), 3158 states have call successors, (3158), 1459 states have call predecessors, (3158), 1596 states have return successors, (3482), 3103 states have call predecessors, (3482), 3157 states have call successors, (3482) [2022-11-23 14:32:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20021 states to 20021 states and 27663 transitions. [2022-11-23 14:32:12,052 INFO L78 Accepts]: Start accepts. Automaton has 20021 states and 27663 transitions. Word has length 213 [2022-11-23 14:32:12,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:12,053 INFO L495 AbstractCegarLoop]: Abstraction has 20021 states and 27663 transitions. [2022-11-23 14:32:12,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 14:32:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 20021 states and 27663 transitions. [2022-11-23 14:32:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-23 14:32:12,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:12,067 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:12,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-23 14:32:12,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 14:32:12,268 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:12,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1178008461, now seen corresponding path program 1 times [2022-11-23 14:32:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:12,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205898343] [2022-11-23 14:32:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:12,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-23 14:32:12,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:12,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205898343] [2022-11-23 14:32:12,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205898343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:12,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358668321] [2022-11-23 14:32:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:12,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:12,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:12,967 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:12,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23dbd3b2-0672-4d51-9211-d407556af907/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:32:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:13,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 2308 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:32:13,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 14:32:13,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-23 14:32:14,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358668321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:32:14,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809510622] [2022-11-23 14:32:14,278 INFO L159 IcfgInterpreter]: Started Sifa with 146 locations of interest [2022-11-23 14:32:14,278 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:32:14,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:32:14,279 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:32:14,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs