./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI --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 32bit --witnessprinter.graph.data.programhash a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 --- 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-5e519f3 [2022-11-03 02:05:23,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:05:23,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:05:23,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:05:23,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:05:23,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:05:23,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:05:23,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:05:23,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:05:23,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:05:23,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:05:23,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:05:23,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:05:23,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:05:23,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:05:23,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:05:23,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:05:23,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:05:23,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:05:23,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:05:23,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:05:23,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:05:23,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:05:23,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:05:23,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:05:23,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:05:23,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:05:23,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:05:23,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:05:23,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:05:23,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:05:23,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:05:23,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:05:23,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:05:23,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:05:23,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:05:23,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:05:23,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:05:23,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:05:23,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:05:23,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:05:23,194 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:05:23,217 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:05:23,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:05:23,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:05:23,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:05:23,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:05:23,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:05:23,220 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:05:23,220 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:05:23,220 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:05:23,221 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:05:23,221 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:05:23,221 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:05:23,221 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:05:23,222 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:05:23,222 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:05:23,222 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:05:23,223 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:05:23,223 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:05:23,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:05:23,224 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:05:23,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:05:23,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:05:23,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:05:23,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:05:23,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:05:23,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:05:23,226 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:05:23,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:05:23,227 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:05:23,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:05:23,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:05:23,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:05:23,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:05:23,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:05:23,228 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:05:23,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:05:23,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:05:23,229 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:05:23,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:05:23,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:05:23,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:05:23,230 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_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 [2022-11-03 02:05:23,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:05:23,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:05:23,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:05:23,599 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:05:23,600 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:05:23,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2022-11-03 02:05:23,678 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/data/d61b62fb2/6ce6bbfade0c4a1d94958b6f65ab6df5/FLAG91b5ebfc6 [2022-11-03 02:05:24,398 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:05:24,398 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2022-11-03 02:05:24,419 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/data/d61b62fb2/6ce6bbfade0c4a1d94958b6f65ab6df5/FLAG91b5ebfc6 [2022-11-03 02:05:24,556 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/data/d61b62fb2/6ce6bbfade0c4a1d94958b6f65ab6df5 [2022-11-03 02:05:24,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:05:24,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:05:24,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:05:24,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:05:24,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:05:24,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:05:24" (1/1) ... [2022-11-03 02:05:24,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d4696d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:24, skipping insertion in model container [2022-11-03 02:05:24,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:05:24" (1/1) ... [2022-11-03 02:05:24,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:05:24,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:05:24,983 WARN L230 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_75641599-a40f-48ea-9db5-fcf3939de03d/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2022-11-03 02:05:25,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:05:25,303 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:05:25,362 WARN L230 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_75641599-a40f-48ea-9db5-fcf3939de03d/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2022-11-03 02:05:25,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:05:25,520 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:05:25,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25 WrapperNode [2022-11-03 02:05:25,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:05:25,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:05:25,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:05:25,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:05:25,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,624 INFO L138 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 905 [2022-11-03 02:05:25,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:05:25,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:05:25,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:05:25,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:05:25,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,714 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:05:25,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:05:25,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:05:25,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:05:25,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:05:25,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:25,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:05:25,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:05:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:05:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 02:05:25,857 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 02:05:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 02:05:25,858 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 02:05:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:05:25,858 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:05:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:05:25,859 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:05:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:05:25,859 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:05:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 02:05:25,860 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 02:05:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:05:25,860 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:05:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:05:25,861 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:05:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 02:05:25,861 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 02:05:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:05:25,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:05:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:05:25,862 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:05:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:05:25,862 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:05:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:05:25,863 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:05:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 02:05:25,863 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 02:05:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:05:25,864 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:05:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:05:25,864 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:05:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:05:25,864 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:05:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:05:25,865 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:05:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:05:25,865 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:05:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:05:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 02:05:25,866 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 02:05:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:05:25,867 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:05:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:05:25,868 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:05:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:05:25,869 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:05:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:05:25,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:05:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:05:25,871 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:05:26,114 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:05:26,117 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:05:27,408 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:05:28,336 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:05:28,336 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:05:28,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:28 BoogieIcfgContainer [2022-11-03 02:05:28,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:05:28,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:05:28,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:05:28,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:05:28,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:05:24" (1/3) ... [2022-11-03 02:05:28,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d37ea7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:05:28, skipping insertion in model container [2022-11-03 02:05:28,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25" (2/3) ... [2022-11-03 02:05:28,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d37ea7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:05:28, skipping insertion in model container [2022-11-03 02:05:28,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:28" (3/3) ... [2022-11-03 02:05:28,354 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product29.cil.c [2022-11-03 02:05:28,373 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:05:28,373 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:05:28,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:05:28,478 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;@2fdf9a8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:05:28,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:05:28,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-11-03 02:05:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:05:28,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:28,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:28,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:28,529 INFO L85 PathProgramCache]: Analyzing trace with hash -847922989, now seen corresponding path program 1 times [2022-11-03 02:05:28,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:28,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909901037] [2022-11-03 02:05:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:28,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:29,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:29,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909901037] [2022-11-03 02:05:29,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909901037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:29,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:29,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:05:29,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914551571] [2022-11-03 02:05:29,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:29,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:05:29,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:29,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:05:29,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:05:29,428 INFO L87 Difference]: Start difference. First operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:05:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:30,125 INFO L93 Difference]: Finished difference Result 844 states and 1368 transitions. [2022-11-03 02:05:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:05:30,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 65 [2022-11-03 02:05:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:30,163 INFO L225 Difference]: With dead ends: 844 [2022-11-03 02:05:30,163 INFO L226 Difference]: Without dead ends: 483 [2022-11-03 02:05:30,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:30,180 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 282 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2315 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:30,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2315 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:05:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-03 02:05:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 373. [2022-11-03 02:05:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 254 states have (on average 1.578740157480315) internal successors, (401), 273 states have internal predecessors, (401), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:05:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 586 transitions. [2022-11-03 02:05:30,276 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 586 transitions. Word has length 65 [2022-11-03 02:05:30,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:30,277 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 586 transitions. [2022-11-03 02:05:30,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:05:30,277 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 586 transitions. [2022-11-03 02:05:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:05:30,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:30,284 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:05:30,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:05:30,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:30,285 INFO L85 PathProgramCache]: Analyzing trace with hash 249604261, now seen corresponding path program 1 times [2022-11-03 02:05:30,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:30,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118834147] [2022-11-03 02:05:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:30,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:05:30,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:30,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118834147] [2022-11-03 02:05:30,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118834147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:30,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:30,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:05:30,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540361375] [2022-11-03 02:05:30,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:30,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:05:30,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:30,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:05:30,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:30,825 INFO L87 Difference]: Start difference. First operand 373 states and 586 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:05:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:34,448 INFO L93 Difference]: Finished difference Result 1280 states and 2045 transitions. [2022-11-03 02:05:34,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:05:34,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 68 [2022-11-03 02:05:34,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:34,460 INFO L225 Difference]: With dead ends: 1280 [2022-11-03 02:05:34,461 INFO L226 Difference]: Without dead ends: 923 [2022-11-03 02:05:34,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:05:34,471 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 1729 mSDsluCounter, 2261 mSDsCounter, 0 mSdLazyCounter, 3547 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 2903 SdHoareTripleChecker+Invalid, 4137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 3547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:34,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1794 Valid, 2903 Invalid, 4137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 3547 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-03 02:05:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-11-03 02:05:34,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 867. [2022-11-03 02:05:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 611 states have (on average 1.5973813420621932) internal successors, (976), 642 states have internal predecessors, (976), 203 states have call successors, (203), 48 states have call predecessors, (203), 52 states have return successors, (210), 201 states have call predecessors, (210), 198 states have call successors, (210) [2022-11-03 02:05:34,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1389 transitions. [2022-11-03 02:05:34,619 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1389 transitions. Word has length 68 [2022-11-03 02:05:34,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:34,621 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1389 transitions. [2022-11-03 02:05:34,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 02:05:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1389 transitions. [2022-11-03 02:05:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:05:34,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:34,632 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:05:34,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:05:34,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1662862818, now seen corresponding path program 1 times [2022-11-03 02:05:34,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:34,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891053479] [2022-11-03 02:05:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:34,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:05:36,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:36,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891053479] [2022-11-03 02:05:36,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891053479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:36,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:36,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:05:36,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565063416] [2022-11-03 02:05:36,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:36,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:05:36,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:36,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:05:36,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:36,049 INFO L87 Difference]: Start difference. First operand 867 states and 1389 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 02:05:40,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:40,752 INFO L93 Difference]: Finished difference Result 3774 states and 6176 transitions. [2022-11-03 02:05:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:05:40,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2022-11-03 02:05:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:40,773 INFO L225 Difference]: With dead ends: 3774 [2022-11-03 02:05:40,774 INFO L226 Difference]: Without dead ends: 2924 [2022-11-03 02:05:40,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:05:40,780 INFO L413 NwaCegarLoop]: 983 mSDtfsCounter, 2588 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 1192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2695 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 3647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1192 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:40,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2695 Valid, 2070 Invalid, 3647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1192 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-03 02:05:40,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2022-11-03 02:05:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2652. [2022-11-03 02:05:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 1862 states have (on average 1.5918367346938775) internal successors, (2964), 1975 states have internal predecessors, (2964), 645 states have call successors, (645), 128 states have call predecessors, (645), 144 states have return successors, (696), 619 states have call predecessors, (696), 640 states have call successors, (696) [2022-11-03 02:05:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 4305 transitions. [2022-11-03 02:05:41,071 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 4305 transitions. Word has length 73 [2022-11-03 02:05:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:41,072 INFO L495 AbstractCegarLoop]: Abstraction has 2652 states and 4305 transitions. [2022-11-03 02:05:41,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 02:05:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 4305 transitions. [2022-11-03 02:05:41,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 02:05:41,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:41,075 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:05:41,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:05:41,075 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:41,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:41,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2120546044, now seen corresponding path program 1 times [2022-11-03 02:05:41,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:41,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824794937] [2022-11-03 02:05:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:41,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:05:41,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:41,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824794937] [2022-11-03 02:05:41,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824794937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:41,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:41,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:05:41,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314415476] [2022-11-03 02:05:41,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:41,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:05:41,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:41,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:05:41,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:41,368 INFO L87 Difference]: Start difference. First operand 2652 states and 4305 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:05:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:41,884 INFO L93 Difference]: Finished difference Result 4528 states and 7355 transitions. [2022-11-03 02:05:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:05:41,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2022-11-03 02:05:41,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:41,909 INFO L225 Difference]: With dead ends: 4528 [2022-11-03 02:05:41,909 INFO L226 Difference]: Without dead ends: 2919 [2022-11-03 02:05:41,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:41,925 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 42 mSDsluCounter, 3067 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:41,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3479 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:05:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2022-11-03 02:05:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2725. [2022-11-03 02:05:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 1913 states have (on average 1.5760585467851542) internal successors, (3015), 2028 states have internal predecessors, (3015), 645 states have call successors, (645), 128 states have call predecessors, (645), 166 states have return successors, (743), 639 states have call predecessors, (743), 640 states have call successors, (743) [2022-11-03 02:05:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 4403 transitions. [2022-11-03 02:05:42,233 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 4403 transitions. Word has length 72 [2022-11-03 02:05:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:42,241 INFO L495 AbstractCegarLoop]: Abstraction has 2725 states and 4403 transitions. [2022-11-03 02:05:42,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:05:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 4403 transitions. [2022-11-03 02:05:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:05:42,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:42,244 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:05:42,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:05:42,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:42,246 INFO L85 PathProgramCache]: Analyzing trace with hash 460163070, now seen corresponding path program 1 times [2022-11-03 02:05:42,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:42,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019990039] [2022-11-03 02:05:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:42,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:05:42,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:42,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019990039] [2022-11-03 02:05:42,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019990039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:42,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:42,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:05:42,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536627441] [2022-11-03 02:05:42,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:42,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:05:42,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:42,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:05:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:42,540 INFO L87 Difference]: Start difference. First operand 2725 states and 4403 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:05:43,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:43,019 INFO L93 Difference]: Finished difference Result 4626 states and 7478 transitions. [2022-11-03 02:05:43,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:05:43,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-11-03 02:05:43,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:43,047 INFO L225 Difference]: With dead ends: 4626 [2022-11-03 02:05:43,048 INFO L226 Difference]: Without dead ends: 2970 [2022-11-03 02:05:43,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:43,059 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 41 mSDsluCounter, 3082 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3498 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:43,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3498 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:05:43,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2022-11-03 02:05:43,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2736. [2022-11-03 02:05:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1924 states have (on average 1.5727650727650728) internal successors, (3026), 2028 states have internal predecessors, (3026), 645 states have call successors, (645), 128 states have call predecessors, (645), 166 states have return successors, (743), 650 states have call predecessors, (743), 640 states have call successors, (743) [2022-11-03 02:05:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4414 transitions. [2022-11-03 02:05:43,372 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4414 transitions. Word has length 73 [2022-11-03 02:05:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:43,373 INFO L495 AbstractCegarLoop]: Abstraction has 2736 states and 4414 transitions. [2022-11-03 02:05:43,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:05:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4414 transitions. [2022-11-03 02:05:43,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:05:43,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:43,376 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:05:43,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:05:43,377 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:43,377 INFO L85 PathProgramCache]: Analyzing trace with hash -407194107, now seen corresponding path program 1 times [2022-11-03 02:05:43,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:43,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241126351] [2022-11-03 02:05:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:43,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:05:43,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:43,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241126351] [2022-11-03 02:05:43,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241126351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:43,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:43,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:05:43,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261338344] [2022-11-03 02:05:43,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:43,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:05:43,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:43,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:05:43,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:05:43,697 INFO L87 Difference]: Start difference. First operand 2736 states and 4414 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-03 02:05:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:46,717 INFO L93 Difference]: Finished difference Result 6186 states and 10031 transitions. [2022-11-03 02:05:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:05:46,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 79 [2022-11-03 02:05:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:46,745 INFO L225 Difference]: With dead ends: 6186 [2022-11-03 02:05:46,745 INFO L226 Difference]: Without dead ends: 4163 [2022-11-03 02:05:46,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:46,760 INFO L413 NwaCegarLoop]: 854 mSDtfsCounter, 1926 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2090 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 3228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 844 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:46,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2090 Valid, 1767 Invalid, 3228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [844 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:05:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2022-11-03 02:05:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 3987. [2022-11-03 02:05:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3987 states, 2754 states have (on average 1.532316630355846) internal successors, (4220), 2918 states have internal predecessors, (4220), 970 states have call successors, (970), 210 states have call predecessors, (970), 262 states have return successors, (1138), 964 states have call predecessors, (1138), 965 states have call successors, (1138) [2022-11-03 02:05:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3987 states to 3987 states and 6328 transitions. [2022-11-03 02:05:47,208 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 6328 transitions. Word has length 79 [2022-11-03 02:05:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:47,208 INFO L495 AbstractCegarLoop]: Abstraction has 3987 states and 6328 transitions. [2022-11-03 02:05:47,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-03 02:05:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 6328 transitions. [2022-11-03 02:05:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 02:05:47,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:47,217 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:05:47,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:05:47,217 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:47,218 INFO L85 PathProgramCache]: Analyzing trace with hash -403940076, now seen corresponding path program 1 times [2022-11-03 02:05:47,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:47,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956394916] [2022-11-03 02:05:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:47,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:05:47,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:47,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956394916] [2022-11-03 02:05:47,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956394916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:47,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:47,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:05:47,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7712929] [2022-11-03 02:05:47,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:47,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:05:47,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:47,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:05:47,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:47,503 INFO L87 Difference]: Start difference. First operand 3987 states and 6328 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 02:05:50,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:50,123 INFO L93 Difference]: Finished difference Result 7540 states and 12021 transitions. [2022-11-03 02:05:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:05:50,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2022-11-03 02:05:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:50,166 INFO L225 Difference]: With dead ends: 7540 [2022-11-03 02:05:50,167 INFO L226 Difference]: Without dead ends: 4493 [2022-11-03 02:05:50,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:05:50,181 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 974 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 1843 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:50,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 1843 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:05:50,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2022-11-03 02:05:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 4068. [2022-11-03 02:05:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4068 states, 2808 states have (on average 1.5263532763532763) internal successors, (4286), 2984 states have internal predecessors, (4286), 973 states have call successors, (973), 225 states have call predecessors, (973), 286 states have return successors, (1172), 964 states have call predecessors, (1172), 968 states have call successors, (1172) [2022-11-03 02:05:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4068 states to 4068 states and 6431 transitions. [2022-11-03 02:05:50,681 INFO L78 Accepts]: Start accepts. Automaton has 4068 states and 6431 transitions. Word has length 82 [2022-11-03 02:05:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:50,682 INFO L495 AbstractCegarLoop]: Abstraction has 4068 states and 6431 transitions. [2022-11-03 02:05:50,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 02:05:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 4068 states and 6431 transitions. [2022-11-03 02:05:50,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:05:50,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:50,686 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:05:50,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:05:50,687 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:50,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:50,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1278460408, now seen corresponding path program 1 times [2022-11-03 02:05:50,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:50,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394898558] [2022-11-03 02:05:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:50,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:05:50,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:50,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394898558] [2022-11-03 02:05:50,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394898558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:50,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:50,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:05:50,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487152140] [2022-11-03 02:05:50,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:50,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:05:50,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:50,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:05:50,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:50,925 INFO L87 Difference]: Start difference. First operand 4068 states and 6431 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:05:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:51,981 INFO L93 Difference]: Finished difference Result 4172 states and 6593 transitions. [2022-11-03 02:05:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:05:51,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2022-11-03 02:05:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:52,012 INFO L225 Difference]: With dead ends: 4172 [2022-11-03 02:05:52,012 INFO L226 Difference]: Without dead ends: 4157 [2022-11-03 02:05:52,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:05:52,017 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 676 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:52,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1808 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:05:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2022-11-03 02:05:52,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 4074. [2022-11-03 02:05:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4074 states, 2814 states have (on average 1.5252309879175552) internal successors, (4292), 2990 states have internal predecessors, (4292), 973 states have call successors, (973), 225 states have call predecessors, (973), 286 states have return successors, (1172), 964 states have call predecessors, (1172), 968 states have call successors, (1172) [2022-11-03 02:05:52,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6437 transitions. [2022-11-03 02:05:52,447 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6437 transitions. Word has length 86 [2022-11-03 02:05:52,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:52,448 INFO L495 AbstractCegarLoop]: Abstraction has 4074 states and 6437 transitions. [2022-11-03 02:05:52,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:05:52,448 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6437 transitions. [2022-11-03 02:05:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 02:05:52,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:52,451 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:05:52,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:05:52,452 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1192687189, now seen corresponding path program 1 times [2022-11-03 02:05:52,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:52,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008737655] [2022-11-03 02:05:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:52,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:05:53,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:53,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008737655] [2022-11-03 02:05:53,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008737655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:53,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270565725] [2022-11-03 02:05:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:53,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:53,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:53,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:53,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:05:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:53,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:05:53,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:05:53,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:53,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270565725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:53,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:53,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2022-11-03 02:05:53,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927013851] [2022-11-03 02:05:53,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:53,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:05:53,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:53,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:05:53,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:05:53,984 INFO L87 Difference]: Start difference. First operand 4074 states and 6437 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 02:05:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:54,445 INFO L93 Difference]: Finished difference Result 4095 states and 6464 transitions. [2022-11-03 02:05:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:05:54,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 91 [2022-11-03 02:05:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:54,468 INFO L225 Difference]: With dead ends: 4095 [2022-11-03 02:05:54,468 INFO L226 Difference]: Without dead ends: 4080 [2022-11-03 02:05:54,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:05:54,471 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 30 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:54,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2158 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2022-11-03 02:05:54,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 4074. [2022-11-03 02:05:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4074 states, 2814 states have (on average 1.5223880597014925) internal successors, (4284), 2990 states have internal predecessors, (4284), 973 states have call successors, (973), 225 states have call predecessors, (973), 286 states have return successors, (1172), 964 states have call predecessors, (1172), 968 states have call successors, (1172) [2022-11-03 02:05:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6429 transitions. [2022-11-03 02:05:54,890 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6429 transitions. Word has length 91 [2022-11-03 02:05:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:54,891 INFO L495 AbstractCegarLoop]: Abstraction has 4074 states and 6429 transitions. [2022-11-03 02:05:54,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-03 02:05:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6429 transitions. [2022-11-03 02:05:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 02:05:54,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:54,894 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:05:54,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:55,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:55,118 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:55,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1661371554, now seen corresponding path program 1 times [2022-11-03 02:05:55,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:55,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573299437] [2022-11-03 02:05:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:55,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:05:57,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:57,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573299437] [2022-11-03 02:05:57,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573299437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:57,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045079473] [2022-11-03 02:05:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:57,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:57,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:57,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:57,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:05:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:57,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:05:57,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:05:58,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:58,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045079473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:58,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:58,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [24] total 29 [2022-11-03 02:05:58,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849262088] [2022-11-03 02:05:58,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:58,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:05:58,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:05:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:05:58,420 INFO L87 Difference]: Start difference. First operand 4074 states and 6429 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:06:01,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:01,359 INFO L93 Difference]: Finished difference Result 9411 states and 14818 transitions. [2022-11-03 02:06:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:06:01,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 98 [2022-11-03 02:06:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:01,411 INFO L225 Difference]: With dead ends: 9411 [2022-11-03 02:06:01,412 INFO L226 Difference]: Without dead ends: 5353 [2022-11-03 02:06:01,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:06:01,438 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 851 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:01,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 1659 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:06:01,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2022-11-03 02:06:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 5302. [2022-11-03 02:06:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5302 states, 3692 states have (on average 1.5159804983748646) internal successors, (5597), 3896 states have internal predecessors, (5597), 1235 states have call successors, (1235), 298 states have call predecessors, (1235), 374 states have return successors, (1487), 1214 states have call predecessors, (1487), 1230 states have call successors, (1487) [2022-11-03 02:06:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5302 states to 5302 states and 8319 transitions. [2022-11-03 02:06:02,098 INFO L78 Accepts]: Start accepts. Automaton has 5302 states and 8319 transitions. Word has length 98 [2022-11-03 02:06:02,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:02,098 INFO L495 AbstractCegarLoop]: Abstraction has 5302 states and 8319 transitions. [2022-11-03 02:06:02,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:06:02,099 INFO L276 IsEmpty]: Start isEmpty. Operand 5302 states and 8319 transitions. [2022-11-03 02:06:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:06:02,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:02,103 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:06:02,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:02,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:02,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash -179589231, now seen corresponding path program 1 times [2022-11-03 02:06:02,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:02,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025552747] [2022-11-03 02:06:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:02,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:06:03,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:03,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025552747] [2022-11-03 02:06:03,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025552747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:03,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781859647] [2022-11-03 02:06:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:03,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:03,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:03,029 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:03,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:06:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:03,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:06:03,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:06,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:06:09,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781859647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:09,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [792914459] [2022-11-03 02:06:09,155 INFO L159 IcfgInterpreter]: Started Sifa with 94 locations of interest [2022-11-03 02:06:09,155 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:06:09,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:06:09,165 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:06:09,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:06:16,132 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2022-11-03 02:07:03,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:03,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:03,560 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:07:03,563 INFO L158 Benchmark]: Toolchain (without parser) took 99002.62ms. Allocated memory was 109.1MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 73.7MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2022-11-03 02:07:03,563 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 77.6MB. Free memory was 52.4MB in the beginning and 52.4MB in the end (delta: 29.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:07:03,563 INFO L158 Benchmark]: CACSL2BoogieTranslator took 959.18ms. Allocated memory is still 109.1MB. Free memory was 73.5MB in the beginning and 58.9MB in the end (delta: 14.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 02:07:03,563 INFO L158 Benchmark]: Boogie Procedure Inliner took 103.23ms. Allocated memory is still 109.1MB. Free memory was 58.9MB in the beginning and 53.8MB in the end (delta: 5.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:07:03,564 INFO L158 Benchmark]: Boogie Preprocessor took 112.89ms. Allocated memory is still 109.1MB. Free memory was 53.8MB in the beginning and 48.6MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:07:03,564 INFO L158 Benchmark]: RCFGBuilder took 2594.62ms. Allocated memory was 109.1MB in the beginning and 155.2MB in the end (delta: 46.1MB). Free memory was 48.0MB in the beginning and 111.4MB in the end (delta: -63.4MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. [2022-11-03 02:07:03,565 INFO L158 Benchmark]: TraceAbstraction took 95216.07ms. Allocated memory was 155.2MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 111.4MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2022-11-03 02:07:03,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 77.6MB. Free memory was 52.4MB in the beginning and 52.4MB in the end (delta: 29.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 959.18ms. Allocated memory is still 109.1MB. Free memory was 73.5MB in the beginning and 58.9MB in the end (delta: 14.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 103.23ms. Allocated memory is still 109.1MB. Free memory was 58.9MB in the beginning and 53.8MB in the end (delta: 5.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 112.89ms. Allocated memory is still 109.1MB. Free memory was 53.8MB in the beginning and 48.6MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 2594.62ms. Allocated memory was 109.1MB in the beginning and 155.2MB in the end (delta: 46.1MB). Free memory was 48.0MB in the beginning and 111.4MB in the end (delta: -63.4MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. * TraceAbstraction took 95216.07ms. Allocated memory was 155.2MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 111.4MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:07:03,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI --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 32bit --witnessprinter.graph.data.programhash a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 --- 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-5e519f3 [2022-11-03 02:07:06,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:07:06,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:07:06,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:07:06,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:07:06,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:07:06,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:07:06,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:07:06,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:07:06,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:07:06,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:07:06,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:07:06,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:07:06,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:07:06,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:07:06,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:07:06,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:07:06,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:07:06,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:07:06,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:07:06,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:07:06,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:07:06,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:07:06,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:07:06,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:07:06,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:07:06,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:07:06,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:07:06,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:07:06,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:07:06,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:07:06,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:07:06,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:07:06,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:07:06,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:07:06,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:07:06,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:07:06,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:07:06,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:07:06,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:07:06,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:07:06,479 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:07:06,528 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:07:06,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:07:06,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:07:06,538 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:07:06,539 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:07:06,539 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:07:06,539 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:07:06,540 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:07:06,540 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:07:06,540 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:07:06,541 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:07:06,542 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:07:06,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:07:06,544 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:07:06,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:07:06,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:07:06,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:07:06,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:07:06,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:07:06,545 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:07:06,546 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:07:06,546 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:07:06,546 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:07:06,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:07:06,547 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:07:06,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:07:06,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:07:06,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:07:06,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:07:06,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:06,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:07:06,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:07:06,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:07:06,550 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:07:06,550 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:06,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:07:06,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:07:06,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:07:06,551 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 [2022-11-03 02:07:06,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:07:07,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:07:07,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:07:07,020 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:07:07,021 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:07:07,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2022-11-03 02:07:07,111 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/data/8778c9dae/6e3c8db9f4a64f7ba959756bba44e046/FLAGed1e37872 [2022-11-03 02:07:08,016 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:07:08,017 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2022-11-03 02:07:08,040 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/data/8778c9dae/6e3c8db9f4a64f7ba959756bba44e046/FLAGed1e37872 [2022-11-03 02:07:08,181 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/data/8778c9dae/6e3c8db9f4a64f7ba959756bba44e046 [2022-11-03 02:07:08,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:07:08,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:07:08,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:08,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:07:08,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:07:08,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:08" (1/1) ... [2022-11-03 02:07:08,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34661c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:08, skipping insertion in model container [2022-11-03 02:07:08,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:08" (1/1) ... [2022-11-03 02:07:08,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:07:08,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:07:08,651 WARN L230 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_75641599-a40f-48ea-9db5-fcf3939de03d/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2022-11-03 02:07:08,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:08,923 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:07:08,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:07:09,027 WARN L230 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_75641599-a40f-48ea-9db5-fcf3939de03d/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2022-11-03 02:07:09,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:09,246 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:07:09,290 WARN L230 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_75641599-a40f-48ea-9db5-fcf3939de03d/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2022-11-03 02:07:09,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:09,423 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:07:09,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09 WrapperNode [2022-11-03 02:07:09,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:09,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:09,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:07:09,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:07:09,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09" (1/1) ... [2022-11-03 02:07:09,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09" (1/1) ... [2022-11-03 02:07:09,519 INFO L138 Inliner]: procedures = 95, calls = 341, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 855 [2022-11-03 02:07:09,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:09,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:07:09,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:07:09,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:07:09,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09" (1/1) ... [2022-11-03 02:07:09,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09" (1/1) ... [2022-11-03 02:07:09,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09" (1/1) ... [2022-11-03 02:07:09,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09" (1/1) ... [2022-11-03 02:07:09,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09" (1/1) ... [2022-11-03 02:07:09,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09" (1/1) ... [2022-11-03 02:07:09,638 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09" (1/1) ... [2022-11-03 02:07:09,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09" (1/1) ... [2022-11-03 02:07:09,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:07:09,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:07:09,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:07:09,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:07:09,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09" (1/1) ... [2022-11-03 02:07:09,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:09,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:07:09,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:07:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:07:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 02:07:09,774 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 02:07:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 02:07:09,775 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 02:07:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:07:09,775 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:07:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:07:09,776 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:07:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:07:09,776 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:07:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 02:07:09,777 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 02:07:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:07:09,777 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:07:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:07:09,777 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:07:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 02:07:09,778 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 02:07:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:07:09,778 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:07:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:07:09,779 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:07:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:07:09,779 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:07:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:07:09,780 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:07:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:07:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 02:07:09,780 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 02:07:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:07:09,781 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:07:09,781 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:07:09,781 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:07:09,781 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:07:09,782 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:07:09,782 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:07:09,782 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:07:09,782 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:07:09,782 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:07:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 02:07:09,783 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 02:07:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:07:09,783 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:07:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:07:09,784 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:07:09,784 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:07:09,784 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:07:09,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:07:09,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:07:09,785 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:07:09,785 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:07:10,061 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:07:10,064 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:07:12,001 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:07:12,016 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:07:12,016 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:07:12,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:12 BoogieIcfgContainer [2022-11-03 02:07:12,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:07:12,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:07:12,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:07:12,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:07:12,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:07:08" (1/3) ... [2022-11-03 02:07:12,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28646a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:12, skipping insertion in model container [2022-11-03 02:07:12,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:09" (2/3) ... [2022-11-03 02:07:12,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28646a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:12, skipping insertion in model container [2022-11-03 02:07:12,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:12" (3/3) ... [2022-11-03 02:07:12,030 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product29.cil.c [2022-11-03 02:07:12,056 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:07:12,056 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:07:12,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:07:12,142 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;@35a44a39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:07:12,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:07:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 572 states, 451 states have (on average 1.6962305986696231) internal successors, (765), 472 states have internal predecessors, (765), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-11-03 02:07:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:07:12,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:12,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:12,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:12,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:12,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2058097453, now seen corresponding path program 1 times [2022-11-03 02:07:12,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:12,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779748485] [2022-11-03 02:07:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:12,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:12,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:12,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:12,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:07:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:12,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:07:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:12,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:12,948 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:12,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779748485] [2022-11-03 02:07:12,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779748485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:12,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:12,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:07:12,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298774238] [2022-11-03 02:07:12,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:12,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:07:12,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:13,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:07:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:07:13,011 INFO L87 Difference]: Start difference. First operand has 572 states, 451 states have (on average 1.6962305986696231) internal successors, (765), 472 states have internal predecessors, (765), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-03 02:07:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:13,106 INFO L93 Difference]: Finished difference Result 593 states and 985 transitions. [2022-11-03 02:07:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:07:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 88 [2022-11-03 02:07:13,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:13,136 INFO L225 Difference]: With dead ends: 593 [2022-11-03 02:07:13,136 INFO L226 Difference]: Without dead ends: 564 [2022-11-03 02:07:13,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:07:13,145 INFO L413 NwaCegarLoop]: 946 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:13,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:07:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-03 02:07:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2022-11-03 02:07:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 445 states have (on average 1.6943820224719102) internal successors, (754), 464 states have internal predecessors, (754), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 939 transitions. [2022-11-03 02:07:13,253 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 939 transitions. Word has length 88 [2022-11-03 02:07:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:13,256 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 939 transitions. [2022-11-03 02:07:13,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-03 02:07:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 939 transitions. [2022-11-03 02:07:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-03 02:07:13,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:13,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:13,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 02:07:13,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:13,479 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:13,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:13,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1168063617, now seen corresponding path program 1 times [2022-11-03 02:07:13,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:13,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753591510] [2022-11-03 02:07:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:13,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:13,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:13,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:13,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:07:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:14,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:07:14,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:14,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:14,220 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:14,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753591510] [2022-11-03 02:07:14,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753591510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:14,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:14,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:14,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826107239] [2022-11-03 02:07:14,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:14,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:14,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:14,225 INFO L87 Difference]: Start difference. First operand 564 states and 939 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:14,439 INFO L93 Difference]: Finished difference Result 1110 states and 1854 transitions. [2022-11-03 02:07:14,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:14,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 90 [2022-11-03 02:07:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:14,456 INFO L225 Difference]: With dead ends: 1110 [2022-11-03 02:07:14,456 INFO L226 Difference]: Without dead ends: 564 [2022-11-03 02:07:14,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:14,467 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 14 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2773 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:14,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2773 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-03 02:07:14,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2022-11-03 02:07:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 445 states have (on average 1.6921348314606741) internal successors, (753), 464 states have internal predecessors, (753), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 938 transitions. [2022-11-03 02:07:14,536 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 938 transitions. Word has length 90 [2022-11-03 02:07:14,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:14,538 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 938 transitions. [2022-11-03 02:07:14,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 938 transitions. [2022-11-03 02:07:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 02:07:14,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:14,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:14,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-03 02:07:14,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:14,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash -879875022, now seen corresponding path program 1 times [2022-11-03 02:07:14,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:14,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534628663] [2022-11-03 02:07:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:14,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:14,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:14,774 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:14,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:07:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:15,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:07:15,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:15,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:15,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:15,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534628663] [2022-11-03 02:07:15,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534628663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:15,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:15,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:15,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11213269] [2022-11-03 02:07:15,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:15,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:15,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:15,444 INFO L87 Difference]: Start difference. First operand 564 states and 938 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:15,556 INFO L93 Difference]: Finished difference Result 1110 states and 1853 transitions. [2022-11-03 02:07:15,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:15,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 91 [2022-11-03 02:07:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:15,565 INFO L225 Difference]: With dead ends: 1110 [2022-11-03 02:07:15,566 INFO L226 Difference]: Without dead ends: 564 [2022-11-03 02:07:15,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:15,575 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 12 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2773 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:15,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2773 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:07:15,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-03 02:07:15,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2022-11-03 02:07:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 445 states have (on average 1.6898876404494383) internal successors, (752), 464 states have internal predecessors, (752), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 937 transitions. [2022-11-03 02:07:15,630 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 937 transitions. Word has length 91 [2022-11-03 02:07:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:15,631 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 937 transitions. [2022-11-03 02:07:15,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 937 transitions. [2022-11-03 02:07:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:07:15,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:15,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:15,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:15,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:15,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:15,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1736603933, now seen corresponding path program 1 times [2022-11-03 02:07:15,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:15,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901019277] [2022-11-03 02:07:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:15,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:15,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:15,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:15,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:07:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:16,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:07:16,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:16,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:16,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:16,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901019277] [2022-11-03 02:07:16,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901019277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:16,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:16,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:16,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725744098] [2022-11-03 02:07:16,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:16,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:16,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:16,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:16,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:16,374 INFO L87 Difference]: Start difference. First operand 564 states and 937 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:16,461 INFO L93 Difference]: Finished difference Result 1110 states and 1852 transitions. [2022-11-03 02:07:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:16,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 92 [2022-11-03 02:07:16,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:16,466 INFO L225 Difference]: With dead ends: 1110 [2022-11-03 02:07:16,467 INFO L226 Difference]: Without dead ends: 564 [2022-11-03 02:07:16,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:16,471 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 10 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2773 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:16,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2773 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:07:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-03 02:07:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2022-11-03 02:07:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 445 states have (on average 1.6876404494382022) internal successors, (751), 464 states have internal predecessors, (751), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 936 transitions. [2022-11-03 02:07:16,497 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 936 transitions. Word has length 92 [2022-11-03 02:07:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:16,498 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 936 transitions. [2022-11-03 02:07:16,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 936 transitions. [2022-11-03 02:07:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 02:07:16,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:16,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:16,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:16,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:16,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1373827058, now seen corresponding path program 1 times [2022-11-03 02:07:16,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:16,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936592744] [2022-11-03 02:07:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:16,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:16,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:16,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:16,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:07:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:17,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:07:17,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:17,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:17,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:17,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936592744] [2022-11-03 02:07:17,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936592744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:17,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:17,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:17,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074505226] [2022-11-03 02:07:17,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:17,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:17,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:17,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:17,233 INFO L87 Difference]: Start difference. First operand 564 states and 936 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:17,313 INFO L93 Difference]: Finished difference Result 1110 states and 1851 transitions. [2022-11-03 02:07:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2022-11-03 02:07:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:17,320 INFO L225 Difference]: With dead ends: 1110 [2022-11-03 02:07:17,320 INFO L226 Difference]: Without dead ends: 564 [2022-11-03 02:07:17,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:17,324 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 8 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2773 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:17,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2773 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:07:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-03 02:07:17,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2022-11-03 02:07:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 445 states have (on average 1.6853932584269662) internal successors, (750), 464 states have internal predecessors, (750), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 935 transitions. [2022-11-03 02:07:17,354 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 935 transitions. Word has length 93 [2022-11-03 02:07:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:17,354 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 935 transitions. [2022-11-03 02:07:17,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 935 transitions. [2022-11-03 02:07:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:07:17,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:17,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:17,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:17,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:17,592 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:17,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:17,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1629839943, now seen corresponding path program 1 times [2022-11-03 02:07:17,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:17,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19865894] [2022-11-03 02:07:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:17,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:17,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:17,596 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:17,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:07:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:07:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:18,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:18,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:18,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19865894] [2022-11-03 02:07:18,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19865894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:18,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:18,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:18,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389863301] [2022-11-03 02:07:18,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:18,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:18,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:18,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:18,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:18,133 INFO L87 Difference]: Start difference. First operand 564 states and 935 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:18,209 INFO L93 Difference]: Finished difference Result 1110 states and 1850 transitions. [2022-11-03 02:07:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:18,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 94 [2022-11-03 02:07:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:18,216 INFO L225 Difference]: With dead ends: 1110 [2022-11-03 02:07:18,216 INFO L226 Difference]: Without dead ends: 564 [2022-11-03 02:07:18,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:18,221 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 6 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2773 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:18,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2773 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:07:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-03 02:07:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2022-11-03 02:07:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 445 states have (on average 1.6831460674157304) internal successors, (749), 464 states have internal predecessors, (749), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 934 transitions. [2022-11-03 02:07:18,246 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 934 transitions. Word has length 94 [2022-11-03 02:07:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:18,246 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 934 transitions. [2022-11-03 02:07:18,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 934 transitions. [2022-11-03 02:07:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 02:07:18,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:18,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:18,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-03 02:07:18,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:18,477 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:18,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:18,477 INFO L85 PathProgramCache]: Analyzing trace with hash 701762538, now seen corresponding path program 1 times [2022-11-03 02:07:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:18,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814181571] [2022-11-03 02:07:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:18,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:18,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:18,480 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:18,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:07:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:18,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:07:18,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:18,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:18,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:18,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814181571] [2022-11-03 02:07:18,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814181571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:18,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:18,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:07:18,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179193015] [2022-11-03 02:07:18,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:18,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:18,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:18,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:18,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:18,998 INFO L87 Difference]: Start difference. First operand 564 states and 934 transitions. Second operand has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:07:19,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:19,186 INFO L93 Difference]: Finished difference Result 1076 states and 1782 transitions. [2022-11-03 02:07:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:07:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2022-11-03 02:07:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:19,192 INFO L225 Difference]: With dead ends: 1076 [2022-11-03 02:07:19,193 INFO L226 Difference]: Without dead ends: 579 [2022-11-03 02:07:19,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:07:19,196 INFO L413 NwaCegarLoop]: 923 mSDtfsCounter, 117 mSDsluCounter, 4519 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5442 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:19,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 5442 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-11-03 02:07:19,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 577. [2022-11-03 02:07:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 455 states have (on average 1.6791208791208792) internal successors, (764), 476 states have internal predecessors, (764), 96 states have call successors, (96), 24 states have call predecessors, (96), 25 states have return successors, (93), 89 states have call predecessors, (93), 91 states have call successors, (93) [2022-11-03 02:07:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 953 transitions. [2022-11-03 02:07:19,240 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 953 transitions. Word has length 95 [2022-11-03 02:07:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:19,241 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 953 transitions. [2022-11-03 02:07:19,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:07:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 953 transitions. [2022-11-03 02:07:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 02:07:19,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:19,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:19,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:19,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:19,470 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:19,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:19,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1121279369, now seen corresponding path program 1 times [2022-11-03 02:07:19,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:19,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089618780] [2022-11-03 02:07:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:19,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:19,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:19,473 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:19,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:07:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:19,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:07:19,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:19,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:19,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:19,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089618780] [2022-11-03 02:07:19,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089618780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:19,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:19,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:19,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878495209] [2022-11-03 02:07:19,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:19,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:19,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:19,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:19,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:19,998 INFO L87 Difference]: Start difference. First operand 577 states and 953 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:20,066 INFO L93 Difference]: Finished difference Result 1128 states and 1876 transitions. [2022-11-03 02:07:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:20,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 95 [2022-11-03 02:07:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:20,073 INFO L225 Difference]: With dead ends: 1128 [2022-11-03 02:07:20,073 INFO L226 Difference]: Without dead ends: 558 [2022-11-03 02:07:20,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:20,077 INFO L413 NwaCegarLoop]: 927 mSDtfsCounter, 3 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:20,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2774 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:07:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-11-03 02:07:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2022-11-03 02:07:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 439 states have (on average 1.674259681093394) internal successors, (735), 458 states have internal predecessors, (735), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 920 transitions. [2022-11-03 02:07:20,100 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 920 transitions. Word has length 95 [2022-11-03 02:07:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:20,101 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 920 transitions. [2022-11-03 02:07:20,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 920 transitions. [2022-11-03 02:07:20,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-03 02:07:20,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:20,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:20,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:20,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:20,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 479775754, now seen corresponding path program 1 times [2022-11-03 02:07:20,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:20,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671327862] [2022-11-03 02:07:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:20,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:20,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:20,340 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:20,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:07:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:20,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:07:20,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:20,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:20,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:20,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671327862] [2022-11-03 02:07:20,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671327862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:20,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:20,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:20,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200278375] [2022-11-03 02:07:20,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:20,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:20,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:20,838 INFO L87 Difference]: Start difference. First operand 558 states and 920 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:21,032 INFO L93 Difference]: Finished difference Result 1064 states and 1760 transitions. [2022-11-03 02:07:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:21,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 96 [2022-11-03 02:07:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:21,040 INFO L225 Difference]: With dead ends: 1064 [2022-11-03 02:07:21,040 INFO L226 Difference]: Without dead ends: 558 [2022-11-03 02:07:21,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:21,046 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 90 mSDsluCounter, 1716 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:21,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 2587 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-11-03 02:07:21,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2022-11-03 02:07:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 439 states have (on average 1.6651480637813212) internal successors, (731), 458 states have internal predecessors, (731), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 916 transitions. [2022-11-03 02:07:21,071 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 916 transitions. Word has length 96 [2022-11-03 02:07:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:21,071 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 916 transitions. [2022-11-03 02:07:21,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 916 transitions. [2022-11-03 02:07:21,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 02:07:21,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:21,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:21,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:21,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:21,291 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:21,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2102271475, now seen corresponding path program 1 times [2022-11-03 02:07:21,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:21,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316628953] [2022-11-03 02:07:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:21,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:21,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:21,294 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:21,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:07:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:21,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:07:21,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:21,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:21,784 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:21,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316628953] [2022-11-03 02:07:21,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316628953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:21,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:21,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:21,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141540722] [2022-11-03 02:07:21,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:21,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:21,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:21,787 INFO L87 Difference]: Start difference. First operand 558 states and 916 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:21,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:21,973 INFO L93 Difference]: Finished difference Result 1064 states and 1756 transitions. [2022-11-03 02:07:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:21,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 97 [2022-11-03 02:07:21,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:21,978 INFO L225 Difference]: With dead ends: 1064 [2022-11-03 02:07:21,978 INFO L226 Difference]: Without dead ends: 558 [2022-11-03 02:07:21,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:21,982 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 85 mSDsluCounter, 1716 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:21,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 2587 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:21,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-11-03 02:07:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2022-11-03 02:07:21,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 439 states have (on average 1.6560364464692483) internal successors, (727), 458 states have internal predecessors, (727), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 912 transitions. [2022-11-03 02:07:22,005 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 912 transitions. Word has length 97 [2022-11-03 02:07:22,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:22,005 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 912 transitions. [2022-11-03 02:07:22,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:22,006 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 912 transitions. [2022-11-03 02:07:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 02:07:22,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:22,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:22,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:22,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:22,233 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:22,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1335233711, now seen corresponding path program 1 times [2022-11-03 02:07:22,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:22,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098033621] [2022-11-03 02:07:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:22,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:22,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:22,235 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:22,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:07:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:22,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:07:22,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:22,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:22,716 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:22,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098033621] [2022-11-03 02:07:22,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098033621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:22,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:22,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:22,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385512459] [2022-11-03 02:07:22,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:22,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:22,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:22,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:22,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:22,719 INFO L87 Difference]: Start difference. First operand 558 states and 912 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:22,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:22,880 INFO L93 Difference]: Finished difference Result 1064 states and 1752 transitions. [2022-11-03 02:07:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:22,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 98 [2022-11-03 02:07:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:22,885 INFO L225 Difference]: With dead ends: 1064 [2022-11-03 02:07:22,886 INFO L226 Difference]: Without dead ends: 558 [2022-11-03 02:07:22,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:22,890 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 80 mSDsluCounter, 1716 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:22,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 2587 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-11-03 02:07:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2022-11-03 02:07:22,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 439 states have (on average 1.6469248291571754) internal successors, (723), 458 states have internal predecessors, (723), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 908 transitions. [2022-11-03 02:07:22,912 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 908 transitions. Word has length 98 [2022-11-03 02:07:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:22,912 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 908 transitions. [2022-11-03 02:07:22,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 908 transitions. [2022-11-03 02:07:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 02:07:22,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:22,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:22,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:23,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:23,141 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:23,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:23,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1790093615, now seen corresponding path program 1 times [2022-11-03 02:07:23,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:23,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045952671] [2022-11-03 02:07:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:23,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:23,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:23,144 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:23,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:07:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:23,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:07:23,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:23,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:23,674 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:23,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045952671] [2022-11-03 02:07:23,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045952671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:23,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:23,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:07:23,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169032156] [2022-11-03 02:07:23,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:23,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:23,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:23,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:23,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:23,677 INFO L87 Difference]: Start difference. First operand 558 states and 908 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:07:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:23,811 INFO L93 Difference]: Finished difference Result 1064 states and 1748 transitions. [2022-11-03 02:07:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:07:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 98 [2022-11-03 02:07:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:23,816 INFO L225 Difference]: With dead ends: 1064 [2022-11-03 02:07:23,817 INFO L226 Difference]: Without dead ends: 537 [2022-11-03 02:07:23,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:07:23,821 INFO L413 NwaCegarLoop]: 896 mSDtfsCounter, 110 mSDsluCounter, 4392 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5288 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:23,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 5288 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-03 02:07:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2022-11-03 02:07:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 418 states have (on average 1.6483253588516746) internal successors, (689), 437 states have internal predecessors, (689), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 874 transitions. [2022-11-03 02:07:23,840 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 874 transitions. Word has length 98 [2022-11-03 02:07:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:23,840 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 874 transitions. [2022-11-03 02:07:23,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:07:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 874 transitions. [2022-11-03 02:07:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:07:23,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:23,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:23,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:24,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:24,071 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:24,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:24,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1894664558, now seen corresponding path program 1 times [2022-11-03 02:07:24,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:24,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028855180] [2022-11-03 02:07:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:24,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:24,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:24,075 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:24,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:07:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:24,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:07:24,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:24,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:24,563 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:24,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028855180] [2022-11-03 02:07:24,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028855180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:24,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:24,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:24,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929228490] [2022-11-03 02:07:24,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:24,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:24,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:24,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:24,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:24,567 INFO L87 Difference]: Start difference. First operand 537 states and 874 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:24,652 INFO L93 Difference]: Finished difference Result 1043 states and 1714 transitions. [2022-11-03 02:07:24,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:24,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2022-11-03 02:07:24,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:24,661 INFO L225 Difference]: With dead ends: 1043 [2022-11-03 02:07:24,662 INFO L226 Difference]: Without dead ends: 537 [2022-11-03 02:07:24,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:24,667 INFO L413 NwaCegarLoop]: 864 mSDtfsCounter, 41 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2573 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:24,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2573 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:07:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-03 02:07:24,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2022-11-03 02:07:24,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 418 states have (on average 1.645933014354067) internal successors, (688), 437 states have internal predecessors, (688), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 873 transitions. [2022-11-03 02:07:24,697 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 873 transitions. Word has length 99 [2022-11-03 02:07:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:24,697 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 873 transitions. [2022-11-03 02:07:24,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:24,698 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 873 transitions. [2022-11-03 02:07:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:07:24,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:24,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:24,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:24,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:24,927 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:24,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:24,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1360672428, now seen corresponding path program 1 times [2022-11-03 02:07:24,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:24,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579039332] [2022-11-03 02:07:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:24,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:24,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:24,930 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:24,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:07:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:25,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:07:25,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:25,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:25,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:25,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579039332] [2022-11-03 02:07:25,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579039332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:25,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:25,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:25,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22659871] [2022-11-03 02:07:25,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:25,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:25,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:25,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:25,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:25,482 INFO L87 Difference]: Start difference. First operand 537 states and 873 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:25,562 INFO L93 Difference]: Finished difference Result 1043 states and 1713 transitions. [2022-11-03 02:07:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:25,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 100 [2022-11-03 02:07:25,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:25,568 INFO L225 Difference]: With dead ends: 1043 [2022-11-03 02:07:25,569 INFO L226 Difference]: Without dead ends: 537 [2022-11-03 02:07:25,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:25,573 INFO L413 NwaCegarLoop]: 864 mSDtfsCounter, 39 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2573 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:25,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2573 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:07:25,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-03 02:07:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2022-11-03 02:07:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 418 states have (on average 1.6435406698564594) internal successors, (687), 437 states have internal predecessors, (687), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 872 transitions. [2022-11-03 02:07:25,615 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 872 transitions. Word has length 100 [2022-11-03 02:07:25,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:25,615 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 872 transitions. [2022-11-03 02:07:25,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 02:07:25,616 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 872 transitions. [2022-11-03 02:07:25,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 02:07:25,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:25,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:25,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:25,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:25,850 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:25,851 INFO L85 PathProgramCache]: Analyzing trace with hash -110194921, now seen corresponding path program 1 times [2022-11-03 02:07:25,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:25,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018102358] [2022-11-03 02:07:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:25,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:25,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:25,853 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:25,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:07:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:26,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:07:26,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:26,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:26,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018102358] [2022-11-03 02:07:26,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018102358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:26,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:26,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:07:26,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319330054] [2022-11-03 02:07:26,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:26,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:07:26,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:26,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:07:26,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:07:26,482 INFO L87 Difference]: Start difference. First operand 537 states and 872 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:07:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:26,681 INFO L93 Difference]: Finished difference Result 1037 states and 1701 transitions. [2022-11-03 02:07:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:07:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2022-11-03 02:07:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:26,687 INFO L225 Difference]: With dead ends: 1037 [2022-11-03 02:07:26,687 INFO L226 Difference]: Without dead ends: 537 [2022-11-03 02:07:26,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:07:26,692 INFO L413 NwaCegarLoop]: 857 mSDtfsCounter, 31 mSDsluCounter, 5116 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 5973 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:26,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 5973 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-03 02:07:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2022-11-03 02:07:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 418 states have (on average 1.6411483253588517) internal successors, (686), 437 states have internal predecessors, (686), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 02:07:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 871 transitions. [2022-11-03 02:07:26,715 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 871 transitions. Word has length 101 [2022-11-03 02:07:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:26,715 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 871 transitions. [2022-11-03 02:07:26,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:07:26,716 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 871 transitions. [2022-11-03 02:07:26,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:07:26,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:26,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:26,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:26,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:26,937 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:26,937 INFO L85 PathProgramCache]: Analyzing trace with hash -620474679, now seen corresponding path program 1 times [2022-11-03 02:07:26,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:26,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799588487] [2022-11-03 02:07:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:26,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:26,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:26,940 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:26,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:07:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:27,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:07:27,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:27,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:27,956 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:27,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799588487] [2022-11-03 02:07:27,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799588487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:27,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:27,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:07:27,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994497042] [2022-11-03 02:07:27,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:27,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:07:27,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:27,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:07:27,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:07:27,958 INFO L87 Difference]: Start difference. First operand 537 states and 871 transitions. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 02:07:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:32,651 INFO L93 Difference]: Finished difference Result 1168 states and 1947 transitions. [2022-11-03 02:07:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:07:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2022-11-03 02:07:32,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:32,665 INFO L225 Difference]: With dead ends: 1168 [2022-11-03 02:07:32,665 INFO L226 Difference]: Without dead ends: 676 [2022-11-03 02:07:32,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:07:32,673 INFO L413 NwaCegarLoop]: 954 mSDtfsCounter, 1454 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 2857 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1454 SdHoareTripleChecker+Valid, 2505 SdHoareTripleChecker+Invalid, 3362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 2857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:32,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1454 Valid, 2505 Invalid, 3362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 2857 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 02:07:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-11-03 02:07:32,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 541. [2022-11-03 02:07:32,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 421 states have (on average 1.6365795724465557) internal successors, (689), 440 states have internal predecessors, (689), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (106), 89 states have call predecessors, (106), 90 states have call successors, (106) [2022-11-03 02:07:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 890 transitions. [2022-11-03 02:07:32,738 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 890 transitions. Word has length 102 [2022-11-03 02:07:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:32,739 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 890 transitions. [2022-11-03 02:07:32,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 5 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 02:07:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 890 transitions. [2022-11-03 02:07:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 02:07:32,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:32,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:32,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:32,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:32,970 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:32,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:32,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2088900271, now seen corresponding path program 1 times [2022-11-03 02:07:32,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:32,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076191377] [2022-11-03 02:07:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:32,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:32,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:32,974 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:32,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:07:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:33,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:07:33,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:33,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:33,673 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:33,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076191377] [2022-11-03 02:07:33,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076191377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:33,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:33,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:07:33,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134719390] [2022-11-03 02:07:33,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:33,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:33,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:33,677 INFO L87 Difference]: Start difference. First operand 541 states and 890 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 02:07:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:41,302 INFO L93 Difference]: Finished difference Result 1947 states and 3312 transitions. [2022-11-03 02:07:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:07:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 103 [2022-11-03 02:07:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:41,324 INFO L225 Difference]: With dead ends: 1947 [2022-11-03 02:07:41,325 INFO L226 Difference]: Without dead ends: 1451 [2022-11-03 02:07:41,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:07:41,330 INFO L413 NwaCegarLoop]: 1413 mSDtfsCounter, 2429 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 4535 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2508 SdHoareTripleChecker+Valid, 3349 SdHoareTripleChecker+Invalid, 5229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 4535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:41,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2508 Valid, 3349 Invalid, 5229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 4535 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-03 02:07:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-11-03 02:07:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1393. [2022-11-03 02:07:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1080 states have (on average 1.6481481481481481) internal successors, (1780), 1128 states have internal predecessors, (1780), 249 states have call successors, (249), 63 states have call predecessors, (249), 63 states have return successors, (270), 238 states have call predecessors, (270), 244 states have call successors, (270) [2022-11-03 02:07:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2299 transitions. [2022-11-03 02:07:41,448 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2299 transitions. Word has length 103 [2022-11-03 02:07:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:41,449 INFO L495 AbstractCegarLoop]: Abstraction has 1393 states and 2299 transitions. [2022-11-03 02:07:41,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 02:07:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2299 transitions. [2022-11-03 02:07:41,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 02:07:41,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:41,454 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:07:41,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:41,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:41,667 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:41,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:41,668 INFO L85 PathProgramCache]: Analyzing trace with hash -481112270, now seen corresponding path program 1 times [2022-11-03 02:07:41,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:41,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163156027] [2022-11-03 02:07:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:41,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:41,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:41,670 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:41,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:07:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:42,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:07:42,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:07:44,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:44,431 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:44,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163156027] [2022-11-03 02:07:44,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163156027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:44,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:44,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:07:44,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127620198] [2022-11-03 02:07:44,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:44,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:44,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:44,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:44,433 INFO L87 Difference]: Start difference. First operand 1393 states and 2299 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:07:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:49,284 INFO L93 Difference]: Finished difference Result 4041 states and 6735 transitions. [2022-11-03 02:07:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:07:49,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 105 [2022-11-03 02:07:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:49,308 INFO L225 Difference]: With dead ends: 4041 [2022-11-03 02:07:49,308 INFO L226 Difference]: Without dead ends: 2693 [2022-11-03 02:07:49,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:07:49,318 INFO L413 NwaCegarLoop]: 877 mSDtfsCounter, 1280 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:49,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1280 Valid, 2918 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 02:07:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2022-11-03 02:07:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 2477. [2022-11-03 02:07:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 1942 states have (on average 1.6611740473738414) internal successors, (3226), 2016 states have internal predecessors, (3226), 424 states have call successors, (424), 109 states have call predecessors, (424), 110 states have return successors, (473), 389 states have call predecessors, (473), 419 states have call successors, (473) [2022-11-03 02:07:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 4123 transitions. [2022-11-03 02:07:49,625 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 4123 transitions. Word has length 105 [2022-11-03 02:07:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:49,626 INFO L495 AbstractCegarLoop]: Abstraction has 2477 states and 4123 transitions. [2022-11-03 02:07:49,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:07:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 4123 transitions. [2022-11-03 02:07:49,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:07:49,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:49,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:49,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:49,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:49,854 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:49,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:49,855 INFO L85 PathProgramCache]: Analyzing trace with hash 414569373, now seen corresponding path program 1 times [2022-11-03 02:07:49,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:49,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554514820] [2022-11-03 02:07:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:49,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:49,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:49,856 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:49,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:07:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:50,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:07:50,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:50,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:50,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:50,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554514820] [2022-11-03 02:07:50,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554514820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:50,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:50,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:07:50,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527809067] [2022-11-03 02:07:50,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:50,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:07:50,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:50,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:07:50,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:07:50,666 INFO L87 Difference]: Start difference. First operand 2477 states and 4123 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 8 states have internal predecessors, (86), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:08:01,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:01,342 INFO L93 Difference]: Finished difference Result 8116 states and 13908 transitions. [2022-11-03 02:08:01,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:08:01,344 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 8 states have internal predecessors, (86), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 109 [2022-11-03 02:08:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:01,400 INFO L225 Difference]: With dead ends: 8116 [2022-11-03 02:08:01,400 INFO L226 Difference]: Without dead ends: 5684 [2022-11-03 02:08:01,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:08:01,421 INFO L413 NwaCegarLoop]: 1794 mSDtfsCounter, 3289 mSDsluCounter, 2663 mSDsCounter, 0 mSdLazyCounter, 6979 mSolverCounterSat, 1174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3426 SdHoareTripleChecker+Valid, 4457 SdHoareTripleChecker+Invalid, 8153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1174 IncrementalHoareTripleChecker+Valid, 6979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:01,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3426 Valid, 4457 Invalid, 8153 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1174 Valid, 6979 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-03 02:08:01,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2022-11-03 02:08:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 4382. [2022-11-03 02:08:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 3298 states have (on average 1.638872043662826) internal successors, (5405), 3470 states have internal predecessors, (5405), 895 states have call successors, (895), 167 states have call predecessors, (895), 188 states have return successors, (1079), 867 states have call predecessors, (1079), 890 states have call successors, (1079) [2022-11-03 02:08:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 7379 transitions. [2022-11-03 02:08:02,052 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 7379 transitions. Word has length 109 [2022-11-03 02:08:02,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:02,053 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 7379 transitions. [2022-11-03 02:08:02,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 8 states have internal predecessors, (86), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:08:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 7379 transitions. [2022-11-03 02:08:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:08:02,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:02,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:02,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:02,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:02,283 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:02,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1558028429, now seen corresponding path program 1 times [2022-11-03 02:08:02,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:02,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721797516] [2022-11-03 02:08:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:02,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:02,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:02,286 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:02,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:08:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:02,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:08:02,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:03,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:03,004 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:03,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721797516] [2022-11-03 02:08:03,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721797516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:03,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:03,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:03,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286600612] [2022-11-03 02:08:03,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:03,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:03,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:03,006 INFO L87 Difference]: Start difference. First operand 4382 states and 7379 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:08:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:08,236 INFO L93 Difference]: Finished difference Result 13706 states and 23720 transitions. [2022-11-03 02:08:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:08:08,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 110 [2022-11-03 02:08:08,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:08,307 INFO L225 Difference]: With dead ends: 13706 [2022-11-03 02:08:08,307 INFO L226 Difference]: Without dead ends: 9372 [2022-11-03 02:08:08,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:08,333 INFO L413 NwaCegarLoop]: 1602 mSDtfsCounter, 2222 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 2497 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2358 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 2497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:08,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2358 Valid, 2732 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 2497 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 02:08:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2022-11-03 02:08:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 9259. [2022-11-03 02:08:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9259 states, 6655 states have (on average 1.6211870773854244) internal successors, (10789), 7089 states have internal predecessors, (10789), 2256 states have call successors, (2256), 283 states have call predecessors, (2256), 347 states have return successors, (2985), 2236 states have call predecessors, (2985), 2251 states have call successors, (2985) [2022-11-03 02:08:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9259 states to 9259 states and 16030 transitions. [2022-11-03 02:08:09,849 INFO L78 Accepts]: Start accepts. Automaton has 9259 states and 16030 transitions. Word has length 110 [2022-11-03 02:08:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:09,849 INFO L495 AbstractCegarLoop]: Abstraction has 9259 states and 16030 transitions. [2022-11-03 02:08:09,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:08:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 9259 states and 16030 transitions. [2022-11-03 02:08:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 02:08:09,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:09,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:09,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:10,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:10,071 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2007114976, now seen corresponding path program 1 times [2022-11-03 02:08:10,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:10,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15502534] [2022-11-03 02:08:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:10,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:10,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:10,074 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:10,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:08:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:10,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:08:10,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:10,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:10,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:10,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15502534] [2022-11-03 02:08:10,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15502534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:10,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:10,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:10,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724884568] [2022-11-03 02:08:10,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:10,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:10,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:10,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:10,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:10,707 INFO L87 Difference]: Start difference. First operand 9259 states and 16030 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:08:18,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:18,043 INFO L93 Difference]: Finished difference Result 31877 states and 57028 transitions. [2022-11-03 02:08:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:08:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 111 [2022-11-03 02:08:18,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:18,244 INFO L225 Difference]: With dead ends: 31877 [2022-11-03 02:08:18,244 INFO L226 Difference]: Without dead ends: 22668 [2022-11-03 02:08:18,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:18,302 INFO L413 NwaCegarLoop]: 1610 mSDtfsCounter, 3330 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 828 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3467 SdHoareTripleChecker+Valid, 2406 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:18,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3467 Valid, 2406 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [828 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 02:08:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22668 states. [2022-11-03 02:08:21,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22668 to 22483. [2022-11-03 02:08:21,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22483 states, 15559 states have (on average 1.6072369689568737) internal successors, (25007), 16706 states have internal predecessors, (25007), 6210 states have call successors, (6210), 515 states have call predecessors, (6210), 713 states have return successors, (9108), 6221 states have call predecessors, (9108), 6205 states have call successors, (9108) [2022-11-03 02:08:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22483 states to 22483 states and 40325 transitions. [2022-11-03 02:08:21,926 INFO L78 Accepts]: Start accepts. Automaton has 22483 states and 40325 transitions. Word has length 111 [2022-11-03 02:08:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:21,927 INFO L495 AbstractCegarLoop]: Abstraction has 22483 states and 40325 transitions. [2022-11-03 02:08:21,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:08:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 22483 states and 40325 transitions. [2022-11-03 02:08:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:08:21,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:21,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:21,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-03 02:08:22,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:22,159 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:22,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:22,159 INFO L85 PathProgramCache]: Analyzing trace with hash -771178638, now seen corresponding path program 1 times [2022-11-03 02:08:22,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:22,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770824890] [2022-11-03 02:08:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:22,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:22,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:22,163 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:22,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:08:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:22,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:08:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:23,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:23,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770824890] [2022-11-03 02:08:23,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770824890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:23,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:23,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:23,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25604700] [2022-11-03 02:08:23,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:23,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:23,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:23,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:23,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:23,074 INFO L87 Difference]: Start difference. First operand 22483 states and 40325 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:08:37,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:37,526 INFO L93 Difference]: Finished difference Result 82465 states and 153311 transitions. [2022-11-03 02:08:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:08:37,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 112 [2022-11-03 02:08:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:38,542 INFO L225 Difference]: With dead ends: 82465 [2022-11-03 02:08:38,543 INFO L226 Difference]: Without dead ends: 60036 [2022-11-03 02:08:38,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:38,704 INFO L413 NwaCegarLoop]: 1618 mSDtfsCounter, 2777 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1820 mSolverCounterSat, 668 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2915 SdHoareTripleChecker+Valid, 2538 SdHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 668 IncrementalHoareTripleChecker+Valid, 1820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:38,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2915 Valid, 2538 Invalid, 2488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [668 Valid, 1820 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 02:08:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60036 states. [2022-11-03 02:08:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60036 to 59699. [2022-11-03 02:08:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59699 states, 40355 states have (on average 1.598438855160451) internal successors, (64505), 43471 states have internal predecessors, (64505), 17744 states have call successors, (17744), 979 states have call predecessors, (17744), 1599 states have return successors, (28851), 17854 states have call predecessors, (28851), 17739 states have call successors, (28851) [2022-11-03 02:08:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59699 states to 59699 states and 111100 transitions. [2022-11-03 02:08:50,175 INFO L78 Accepts]: Start accepts. Automaton has 59699 states and 111100 transitions. Word has length 112 [2022-11-03 02:08:50,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:50,176 INFO L495 AbstractCegarLoop]: Abstraction has 59699 states and 111100 transitions. [2022-11-03 02:08:50,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 02:08:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 59699 states and 111100 transitions. [2022-11-03 02:08:50,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 02:08:50,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:50,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:50,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:50,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:50,395 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:50,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1025625627, now seen corresponding path program 1 times [2022-11-03 02:08:50,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:50,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935487298] [2022-11-03 02:08:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:50,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:50,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:50,398 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:50,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75641599-a40f-48ea-9db5-fcf3939de03d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:08:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:50,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:08:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:51,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:51,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:51,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935487298] [2022-11-03 02:08:51,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935487298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:51,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:51,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:51,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984264705] [2022-11-03 02:08:51,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:51,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:51,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:51,252 INFO L87 Difference]: Start difference. First operand 59699 states and 111100 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11)