./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p7.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/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_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p7.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/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 64bit --witnessprinter.graph.data.programhash 9624ba816941bfede66f01542dce3f33a9c079124b33387d166af076651564ba --- 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 02:08:21,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:08:21,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:08:21,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:08:21,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:08:21,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:08:21,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:08:21,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:08:21,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:08:21,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:08:21,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:08:21,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:08:21,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:08:21,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:08:21,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:08:21,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:08:21,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:08:21,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:08:21,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:08:21,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:08:21,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:08:21,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:08:21,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:08:21,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:08:21,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:08:21,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:08:21,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:08:21,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:08:21,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:08:21,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:08:21,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:08:21,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:08:21,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:08:21,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:08:21,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:08:21,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:08:21,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:08:21,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:08:21,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:08:21,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:08:21,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:08:21,314 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:08:21,366 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:08:21,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:08:21,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:08:21,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:08:21,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:08:21,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:08:21,369 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:08:21,369 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:08:21,369 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:08:21,369 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:08:21,370 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:08:21,371 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:08:21,371 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:08:21,371 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:08:21,372 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:08:21,372 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:08:21,372 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:08:21,372 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:08:21,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:08:21,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:08:21,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:08:21,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:08:21,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:08:21,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:08:21,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:08:21,377 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:08:21,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:08:21,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:08:21,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:08:21,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:08:21,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:08:21,378 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:08:21,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:08:21,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:08:21,379 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:08:21,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:08:21,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:08:21,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:08:21,380 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_1be8b476-d56b-4e60-8c4e-63207cc38687/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9624ba816941bfede66f01542dce3f33a9c079124b33387d166af076651564ba [2022-11-03 02:08:21,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:08:21,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:08:21,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:08:21,784 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:08:21,785 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:08:21,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p7.c [2022-11-03 02:08:21,898 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/data/a55ec23ef/f22ae32bf4574f0fa0cfba67162fb0bb/FLAG60cd1eed4 [2022-11-03 02:08:22,729 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:08:22,730 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p7.c [2022-11-03 02:08:22,751 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/data/a55ec23ef/f22ae32bf4574f0fa0cfba67162fb0bb/FLAG60cd1eed4 [2022-11-03 02:08:22,890 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/data/a55ec23ef/f22ae32bf4574f0fa0cfba67162fb0bb [2022-11-03 02:08:22,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:08:22,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:08:22,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:08:22,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:08:22,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:08:22,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:08:22" (1/1) ... [2022-11-03 02:08:22,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eee57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:22, skipping insertion in model container [2022-11-03 02:08:22,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:08:22" (1/1) ... [2022-11-03 02:08:22,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:08:23,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:08:23,287 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_1be8b476-d56b-4e60-8c4e-63207cc38687/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p7.c[1107,1120] [2022-11-03 02:08:23,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:08:23,914 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:08:23,931 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_1be8b476-d56b-4e60-8c4e-63207cc38687/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p7.c[1107,1120] [2022-11-03 02:08:24,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:08:24,166 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:08:24,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24 WrapperNode [2022-11-03 02:08:24,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:08:24,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:08:24,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:08:24,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:08:24,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24" (1/1) ... [2022-11-03 02:08:24,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24" (1/1) ... [2022-11-03 02:08:24,462 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2317 [2022-11-03 02:08:24,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:08:24,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:08:24,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:08:24,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:08:24,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24" (1/1) ... [2022-11-03 02:08:24,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24" (1/1) ... [2022-11-03 02:08:24,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24" (1/1) ... [2022-11-03 02:08:24,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24" (1/1) ... [2022-11-03 02:08:24,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24" (1/1) ... [2022-11-03 02:08:24,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24" (1/1) ... [2022-11-03 02:08:24,710 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24" (1/1) ... [2022-11-03 02:08:24,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24" (1/1) ... [2022-11-03 02:08:24,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:08:24,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:08:24,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:08:24,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:08:24,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24" (1/1) ... [2022-11-03 02:08:24,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:08:24,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:24,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:08:24,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:08:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:08:24,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:08:25,684 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:08:25,686 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:08:31,209 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:08:43,730 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:08:43,730 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:08:43,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:08:43 BoogieIcfgContainer [2022-11-03 02:08:43,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:08:43,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:08:43,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:08:43,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:08:43,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:08:22" (1/3) ... [2022-11-03 02:08:43,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65de52db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:08:43, skipping insertion in model container [2022-11-03 02:08:43,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:24" (2/3) ... [2022-11-03 02:08:43,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65de52db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:08:43, skipping insertion in model container [2022-11-03 02:08:43,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:08:43" (3/3) ... [2022-11-03 02:08:43,746 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsa16a_p7.c [2022-11-03 02:08:43,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:08:43,770 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:08:43,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:08:43,856 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;@c53a8fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:08:43,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:08:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:08:43,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:43,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:08:43,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:43,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:43,884 INFO L85 PathProgramCache]: Analyzing trace with hash 28728552, now seen corresponding path program 1 times [2022-11-03 02:08:43,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:43,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225422109] [2022-11-03 02:08:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:43,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:08:44,506 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:08:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:08:44,976 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:08:44,978 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:08:44,980 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:08:44,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:08:44,989 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:08:44,995 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:08:45,048 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:08:45,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:08:45 BoogieIcfgContainer [2022-11-03 02:08:45,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:08:45,079 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:08:45,079 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:08:45,080 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:08:45,081 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:08:43" (3/4) ... [2022-11-03 02:08:45,086 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:08:45,086 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:08:45,088 INFO L158 Benchmark]: Toolchain (without parser) took 22192.16ms. Allocated memory was 86.0MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 64.3MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 494.8MB. Max. memory is 16.1GB. [2022-11-03 02:08:45,089 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 86.0MB. Free memory was 64.2MB in the beginning and 64.1MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:08:45,090 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1270.63ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 64.1MB in the beginning and 57.8MB in the end (delta: 6.3MB). Peak memory consumption was 45.2MB. Max. memory is 16.1GB. [2022-11-03 02:08:45,091 INFO L158 Benchmark]: Boogie Procedure Inliner took 294.09ms. Allocated memory is still 104.9MB. Free memory was 57.8MB in the beginning and 42.6MB in the end (delta: 15.1MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. [2022-11-03 02:08:45,098 INFO L158 Benchmark]: Boogie Preprocessor took 310.35ms. Allocated memory is still 104.9MB. Free memory was 42.6MB in the beginning and 38.2MB in the end (delta: 4.4MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2022-11-03 02:08:45,099 INFO L158 Benchmark]: RCFGBuilder took 18960.21ms. Allocated memory was 104.9MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 38.2MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 784.1MB. Max. memory is 16.1GB. [2022-11-03 02:08:45,101 INFO L158 Benchmark]: TraceAbstraction took 1338.71ms. Allocated memory is still 2.3GB. Free memory was 1.9GB in the beginning and 1.8GB in the end (delta: 78.6MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. [2022-11-03 02:08:45,103 INFO L158 Benchmark]: Witness Printer took 6.96ms. Allocated memory is still 2.3GB. Free memory was 1.8GB in the beginning and 1.8GB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:08:45,113 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 86.0MB. Free memory was 64.2MB in the beginning and 64.1MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1270.63ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 64.1MB in the beginning and 57.8MB in the end (delta: 6.3MB). Peak memory consumption was 45.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 294.09ms. Allocated memory is still 104.9MB. Free memory was 57.8MB in the beginning and 42.6MB in the end (delta: 15.1MB). Peak memory consumption was 27.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 310.35ms. Allocated memory is still 104.9MB. Free memory was 42.6MB in the beginning and 38.2MB in the end (delta: 4.4MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. * RCFGBuilder took 18960.21ms. Allocated memory was 104.9MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 38.2MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 784.1MB. Max. memory is 16.1GB. * TraceAbstraction took 1338.71ms. Allocated memory is still 2.3GB. Free memory was 1.9GB in the beginning and 1.8GB in the end (delta: 78.6MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. * Witness Printer took 6.96ms. Allocated memory is still 2.3GB. Free memory was 1.8GB in the beginning and 1.8GB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 209, overapproximation of bitwiseOr at line 219, overapproximation of bitwiseAnd at line 183. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 16); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (16 - 1); [L31] const SORT_9 mask_SORT_9 = (SORT_9)-1 >> (sizeof(SORT_9) * 8 - 3); [L32] const SORT_9 msb_SORT_9 = (SORT_9)1 << (3 - 1); [L34] const SORT_13 mask_SORT_13 = (SORT_13)-1 >> (sizeof(SORT_13) * 8 - 2); [L35] const SORT_13 msb_SORT_13 = (SORT_13)1 << (2 - 1); [L37] const SORT_48 mask_SORT_48 = (SORT_48)-1 >> (sizeof(SORT_48) * 8 - 12); [L38] const SORT_48 msb_SORT_48 = (SORT_48)1 << (12 - 1); [L40] const SORT_86 mask_SORT_86 = (SORT_86)-1 >> (sizeof(SORT_86) * 8 - 17); [L41] const SORT_86 msb_SORT_86 = (SORT_86)1 << (17 - 1); [L43] const SORT_87 mask_SORT_87 = (SORT_87)-1 >> (sizeof(SORT_87) * 8 - 5); [L44] const SORT_87 msb_SORT_87 = (SORT_87)1 << (5 - 1); [L46] const SORT_90 mask_SORT_90 = (SORT_90)-1 >> (sizeof(SORT_90) * 8 - 9); [L47] const SORT_90 msb_SORT_90 = (SORT_90)1 << (9 - 1); [L49] const SORT_92 mask_SORT_92 = (SORT_92)-1 >> (sizeof(SORT_92) * 8 - 10); [L50] const SORT_92 msb_SORT_92 = (SORT_92)1 << (10 - 1); [L52] const SORT_95 mask_SORT_95 = (SORT_95)-1 >> (sizeof(SORT_95) * 8 - 11); [L53] const SORT_95 msb_SORT_95 = (SORT_95)1 << (11 - 1); [L55] const SORT_100 mask_SORT_100 = (SORT_100)-1 >> (sizeof(SORT_100) * 8 - 13); [L56] const SORT_100 msb_SORT_100 = (SORT_100)1 << (13 - 1); [L58] const SORT_103 mask_SORT_103 = (SORT_103)-1 >> (sizeof(SORT_103) * 8 - 14); [L59] const SORT_103 msb_SORT_103 = (SORT_103)1 << (14 - 1); [L61] const SORT_106 mask_SORT_106 = (SORT_106)-1 >> (sizeof(SORT_106) * 8 - 15); [L62] const SORT_106 msb_SORT_106 = (SORT_106)1 << (15 - 1); [L64] const SORT_139 mask_SORT_139 = (SORT_139)-1 >> (sizeof(SORT_139) * 8 - 7); [L65] const SORT_139 msb_SORT_139 = (SORT_139)1 << (7 - 1); [L67] const SORT_372 mask_SORT_372 = (SORT_372)-1 >> (sizeof(SORT_372) * 8 - 4); [L68] const SORT_372 msb_SORT_372 = (SORT_372)1 << (4 - 1); [L70] const SORT_375 mask_SORT_375 = (SORT_375)-1 >> (sizeof(SORT_375) * 8 - 6); [L71] const SORT_375 msb_SORT_375 = (SORT_375)1 << (6 - 1); [L73] const SORT_378 mask_SORT_378 = (SORT_378)-1 >> (sizeof(SORT_378) * 8 - 8); [L74] const SORT_378 msb_SORT_378 = (SORT_378)1 << (8 - 1); [L76] const SORT_3 var_6 = 0; [L77] const SORT_9 var_11 = 3; [L78] const SORT_13 var_15 = 1; [L79] const SORT_9 var_23 = 0; [L80] const SORT_1 var_37 = 1; [L81] const SORT_1 var_43 = 0; [L82] const SORT_48 var_49 = 0; [L83] const SORT_9 var_62 = 2; [L84] const SORT_9 var_66 = 1; [L85] const SORT_9 var_71 = 4; [L86] const SORT_9 var_73 = 5; [L87] const SORT_87 var_88 = 0; [L88] const SORT_139 var_141 = 5; [L89] const SORT_139 var_145 = 4; [L90] const SORT_139 var_149 = 3; [L91] const SORT_139 var_153 = 2; [L92] const SORT_139 var_157 = 1; [L93] const SORT_139 var_161 = 0; [L94] const SORT_48 var_200 = 2; [L95] const SORT_13 var_216 = 0; [L96] const SORT_3 var_223 = 65535; [L98] SORT_1 input_2; [L99] SORT_3 input_4; [L100] SORT_3 input_5; [L101] SORT_3 input_212; [L102] SORT_3 input_213; [L103] SORT_3 input_214; [L104] SORT_3 input_222; [L105] SORT_3 input_230; [L106] SORT_3 input_231; [L107] SORT_3 input_232; [L108] SORT_3 input_235; [L109] SORT_3 input_253; [L110] SORT_3 input_254; [L111] SORT_3 input_255; [L112] SORT_3 input_258; [L113] SORT_3 input_260; [L114] SORT_13 input_274; [L115] SORT_13 input_275; [L116] SORT_13 input_276; [L118] SORT_3 state_7 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L119] SORT_9 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_9; [L120] SORT_3 state_28 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L121] SORT_3 state_30 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L122] SORT_3 state_41 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L123] SORT_1 state_44 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L124] SORT_3 state_46 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L125] SORT_48 state_50 = __VERIFIER_nondet_ushort() & mask_SORT_48; [L126] SORT_48 state_52 = __VERIFIER_nondet_ushort() & mask_SORT_48; [L127] SORT_3 state_54 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L128] SORT_3 state_56 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L129] SORT_3 state_58 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L130] SORT_3 state_60 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L132] SORT_3 init_8_arg_1 = var_6; [L133] state_7 = init_8_arg_1 [L134] SORT_9 init_25_arg_1 = var_23; [L135] state_24 = init_25_arg_1 [L136] SORT_3 init_29_arg_1 = var_6; [L137] state_28 = init_29_arg_1 [L138] SORT_3 init_31_arg_1 = var_6; [L139] state_30 = init_31_arg_1 [L140] SORT_3 init_42_arg_1 = var_6; [L141] state_41 = init_42_arg_1 [L142] SORT_1 init_45_arg_1 = var_43; [L143] state_44 = init_45_arg_1 [L144] SORT_3 init_47_arg_1 = var_6; [L145] state_46 = init_47_arg_1 [L146] SORT_48 init_51_arg_1 = var_49; [L147] state_50 = init_51_arg_1 [L148] SORT_48 init_53_arg_1 = var_49; [L149] state_52 = init_53_arg_1 [L150] SORT_3 init_55_arg_1 = var_6; [L151] state_54 = init_55_arg_1 [L152] SORT_3 init_57_arg_1 = var_6; [L153] state_56 = init_57_arg_1 [L154] SORT_3 init_59_arg_1 = var_6; [L155] state_58 = init_59_arg_1 [L156] SORT_3 init_61_arg_1 = var_6; [L157] state_60 = init_61_arg_1 VAL [init_25_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_42_arg_1=0, init_45_arg_1=0, init_47_arg_1=0, init_51_arg_1=0, init_53_arg_1=0, init_55_arg_1=0, init_57_arg_1=0, init_59_arg_1=0, init_61_arg_1=0, init_8_arg_1=0, mask_SORT_1=1, mask_SORT_100=8191, mask_SORT_103=16383, mask_SORT_106=32767, mask_SORT_13=3, mask_SORT_139=127, mask_SORT_3=65535, mask_SORT_372=15, mask_SORT_375=63, mask_SORT_378=255, mask_SORT_48=4095, mask_SORT_86=4294967295, mask_SORT_87=31, mask_SORT_9=7, mask_SORT_90=511, mask_SORT_92=1023, mask_SORT_95=2047, msb_SORT_1=1, msb_SORT_100=4096, msb_SORT_103=8192, msb_SORT_106=16384, msb_SORT_13=2, msb_SORT_139=64, msb_SORT_3=32768, msb_SORT_372=8, msb_SORT_375=32, msb_SORT_378=128, msb_SORT_48=2048, msb_SORT_86=65536, msb_SORT_87=16, msb_SORT_9=4, msb_SORT_90=256, msb_SORT_92=512, msb_SORT_95=1024, state_24=0, state_28=0, state_30=0, state_41=0, state_44=0, state_46=0, state_50=0, state_52=0, state_54=0, state_56=0, state_58=0, state_60=0, state_7=0, var_11=3, var_141=5, var_145=4, var_149=3, var_15=1, var_153=2, var_157=1, var_161=0, var_200=2, var_216=0, var_223=65535, var_23=0, var_37=1, var_43=0, var_49=0, var_6=0, var_62=2, var_66=1, var_71=4, var_73=5, var_88=0] [L160] input_2 = __VERIFIER_nondet_uchar() [L161] input_4 = __VERIFIER_nondet_ushort() [L162] input_5 = __VERIFIER_nondet_ushort() [L163] input_212 = __VERIFIER_nondet_ushort() [L164] input_213 = __VERIFIER_nondet_ushort() [L165] input_214 = __VERIFIER_nondet_ushort() [L166] input_222 = __VERIFIER_nondet_ushort() [L167] input_230 = __VERIFIER_nondet_ushort() [L168] input_231 = __VERIFIER_nondet_ushort() [L169] input_232 = __VERIFIER_nondet_ushort() [L170] input_235 = __VERIFIER_nondet_ushort() [L171] input_253 = __VERIFIER_nondet_ushort() [L172] input_254 = __VERIFIER_nondet_ushort() [L173] input_255 = __VERIFIER_nondet_ushort() [L174] input_258 = __VERIFIER_nondet_ushort() [L175] input_260 = __VERIFIER_nondet_ushort() [L176] input_274 = __VERIFIER_nondet_uchar() [L177] input_275 = __VERIFIER_nondet_uchar() [L178] input_276 = __VERIFIER_nondet_uchar() [L181] SORT_3 var_10_arg_0 = state_7; [L182] SORT_9 var_10 = var_10_arg_0 >> 0; [L183] var_10 = var_10 & mask_SORT_9 [L184] SORT_9 var_12_arg_0 = var_10; [L185] SORT_9 var_12_arg_1 = var_11; [L186] SORT_1 var_12 = var_12_arg_0 == var_12_arg_1; [L187] SORT_3 var_14_arg_0 = state_7; [L188] SORT_13 var_14 = var_14_arg_0 >> 10; [L189] var_14 = var_14 & mask_SORT_13 [L190] SORT_13 var_16_arg_0 = var_14; [L191] SORT_13 var_16_arg_1 = var_15; [L192] SORT_1 var_16 = var_16_arg_0 == var_16_arg_1; [L193] SORT_1 var_17_arg_0 = var_12; [L194] SORT_1 var_17_arg_1 = var_16; [L195] SORT_1 var_17 = var_17_arg_0 & var_17_arg_1; [L196] SORT_3 var_18_arg_0 = state_7; [L197] SORT_13 var_18 = var_18_arg_0 >> 3; [L198] var_18 = var_18 & mask_SORT_13 [L199] SORT_3 var_19_arg_0 = state_7; [L200] SORT_13 var_19 = var_19_arg_0 >> 5; [L201] var_19 = var_19 & mask_SORT_13 [L202] SORT_13 var_20_arg_0 = var_18; [L203] SORT_13 var_20_arg_1 = var_19; [L204] SORT_1 var_20 = var_20_arg_0 == var_20_arg_1; [L205] SORT_1 var_21_arg_0 = var_17; [L206] SORT_1 var_21_arg_1 = var_20; [L207] SORT_1 var_21 = var_21_arg_0 & var_21_arg_1; [L208] SORT_1 var_22_arg_0 = var_21; [L209] SORT_1 var_22 = ~var_22_arg_0; [L210] SORT_9 var_26_arg_0 = state_24; [L211] SORT_1 var_26 = var_26_arg_0 >> 2; [L212] SORT_1 var_27_arg_0 = var_26; [L213] SORT_1 var_27 = ~var_27_arg_0; [L214] SORT_3 var_32_arg_0 = state_28; [L215] SORT_3 var_32_arg_1 = state_30; [L216] SORT_1 var_32 = var_32_arg_0 == var_32_arg_1; [L217] SORT_1 var_33_arg_0 = var_27; [L218] SORT_1 var_33_arg_1 = var_32; [L219] SORT_1 var_33 = var_33_arg_0 | var_33_arg_1; [L220] SORT_1 var_34_arg_0 = var_22; [L221] SORT_1 var_34_arg_1 = var_33; [L222] SORT_1 var_34 = var_34_arg_0 | var_34_arg_1; [L223] SORT_1 var_38_arg_0 = var_34; [L224] SORT_1 var_38 = ~var_38_arg_0; [L225] SORT_1 var_39_arg_0 = var_37; [L226] SORT_1 var_39_arg_1 = var_38; [L227] SORT_1 var_39 = var_39_arg_0 & var_39_arg_1; [L228] var_39 = var_39 & mask_SORT_1 [L229] SORT_1 bad_40_arg_0 = var_39; [L230] CALL __VERIFIER_assert(!(bad_40_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:08:45,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/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_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p7.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/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 64bit --witnessprinter.graph.data.programhash 9624ba816941bfede66f01542dce3f33a9c079124b33387d166af076651564ba --- 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 02:08:48,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:08:48,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:08:48,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:08:48,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:08:48,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:08:48,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:08:48,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:08:48,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:08:48,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:08:48,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:08:48,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:08:48,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:08:48,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:08:48,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:08:48,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:08:48,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:08:48,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:08:48,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:08:48,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:08:48,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:08:48,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:08:48,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:08:48,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:08:48,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:08:48,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:08:48,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:08:48,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:08:48,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:08:48,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:08:48,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:08:48,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:08:48,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:08:48,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:08:48,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:08:48,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:08:48,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:08:48,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:08:48,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:08:48,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:08:48,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:08:48,297 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:08:48,350 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:08:48,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:08:48,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:08:48,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:08:48,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:08:48,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:08:48,353 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:08:48,353 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:08:48,353 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:08:48,353 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:08:48,354 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:08:48,354 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:08:48,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:08:48,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:08:48,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:08:48,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:08:48,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:08:48,356 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:08:48,356 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:08:48,356 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:08:48,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:08:48,357 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:08:48,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:08:48,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:08:48,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:08:48,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:08:48,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:08:48,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:08:48,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:08:48,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:08:48,359 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:08:48,359 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:08:48,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:08:48,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:08:48,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:08:48,360 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_1be8b476-d56b-4e60-8c4e-63207cc38687/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9624ba816941bfede66f01542dce3f33a9c079124b33387d166af076651564ba [2022-11-03 02:08:48,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:08:48,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:08:48,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:08:48,892 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:08:48,894 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:08:48,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p7.c [2022-11-03 02:08:48,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/data/d189d4698/491a97a20746413889df8518325ca4e5/FLAG8fcd8a5e0 [2022-11-03 02:08:49,874 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:08:49,875 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p7.c [2022-11-03 02:08:49,908 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/data/d189d4698/491a97a20746413889df8518325ca4e5/FLAG8fcd8a5e0 [2022-11-03 02:08:50,007 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/data/d189d4698/491a97a20746413889df8518325ca4e5 [2022-11-03 02:08:50,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:08:50,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:08:50,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:08:50,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:08:50,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:08:50,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:08:50" (1/1) ... [2022-11-03 02:08:50,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54425b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:50, skipping insertion in model container [2022-11-03 02:08:50,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:08:50" (1/1) ... [2022-11-03 02:08:50,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:08:50,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:08:50,357 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_1be8b476-d56b-4e60-8c4e-63207cc38687/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p7.c[1107,1120] [2022-11-03 02:08:50,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:08:50,934 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:08:50,947 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_1be8b476-d56b-4e60-8c4e-63207cc38687/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsa16a_p7.c[1107,1120] [2022-11-03 02:08:51,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:08:51,151 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:08:51,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51 WrapperNode [2022-11-03 02:08:51,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:08:51,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:08:51,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:08:51,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:08:51,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51" (1/1) ... [2022-11-03 02:08:51,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51" (1/1) ... [2022-11-03 02:08:51,321 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2317 [2022-11-03 02:08:51,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:08:51,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:08:51,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:08:51,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:08:51,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51" (1/1) ... [2022-11-03 02:08:51,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51" (1/1) ... [2022-11-03 02:08:51,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51" (1/1) ... [2022-11-03 02:08:51,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51" (1/1) ... [2022-11-03 02:08:51,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51" (1/1) ... [2022-11-03 02:08:51,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51" (1/1) ... [2022-11-03 02:08:51,460 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51" (1/1) ... [2022-11-03 02:08:51,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51" (1/1) ... [2022-11-03 02:08:51,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:08:51,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:08:51,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:08:51,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:08:51,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51" (1/1) ... [2022-11-03 02:08:51,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:08:51,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:51,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:08:51,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:08:51,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:08:51,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:08:52,347 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:08:52,350 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:08:54,405 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:08:54,430 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:08:54,431 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:08:54,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:08:54 BoogieIcfgContainer [2022-11-03 02:08:54,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:08:54,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:08:54,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:08:54,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:08:54,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:08:50" (1/3) ... [2022-11-03 02:08:54,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217ae4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:08:54, skipping insertion in model container [2022-11-03 02:08:54,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:51" (2/3) ... [2022-11-03 02:08:54,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217ae4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:08:54, skipping insertion in model container [2022-11-03 02:08:54,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:08:54" (3/3) ... [2022-11-03 02:08:54,451 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsa16a_p7.c [2022-11-03 02:08:54,482 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:08:54,482 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:08:54,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:08:54,615 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;@3997a004, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:08:54,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:08:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 269 states, 267 states have (on average 1.4981273408239701) internal successors, (400), 268 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:08:54,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:54,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:08:54,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:54,650 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:08:54,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:54,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911674819] [2022-11-03 02:08:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:54,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:54,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:54,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:54,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:08:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:55,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:08:55,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:55,642 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 02:08:55,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:55,644 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:55,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911674819] [2022-11-03 02:08:55,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911674819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:55,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:55,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:55,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092957346] [2022-11-03 02:08:55,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:55,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:08:55,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:08:55,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:55,706 INFO L87 Difference]: Start difference. First operand has 269 states, 267 states have (on average 1.4981273408239701) internal successors, (400), 268 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:56,532 INFO L93 Difference]: Finished difference Result 794 states and 1191 transitions. [2022-11-03 02:08:56,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:08:56,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:08:56,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:56,563 INFO L225 Difference]: With dead ends: 794 [2022-11-03 02:08:56,564 INFO L226 Difference]: Without dead ends: 527 [2022-11-03 02:08:56,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 02:08:56,584 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 777 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:56,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 1028 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:08:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-11-03 02:08:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 267. [2022-11-03 02:08:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.4887218045112782) internal successors, (396), 266 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 396 transitions. [2022-11-03 02:08:56,673 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 396 transitions. Word has length 5 [2022-11-03 02:08:56,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:56,674 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 396 transitions. [2022-11-03 02:08:56,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:56,675 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 396 transitions. [2022-11-03 02:08:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:08:56,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:56,687 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:08:56,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 02:08:56,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:56,893 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash -464126881, now seen corresponding path program 1 times [2022-11-03 02:08:56,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:56,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371759998] [2022-11-03 02:08:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:56,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:56,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:56,898 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:56,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:08:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:58,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:08:58,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:58,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:58,489 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:08:58,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371759998] [2022-11-03 02:08:58,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371759998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:58,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:58,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:58,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811861217] [2022-11-03 02:08:58,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:58,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:08:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:58,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:08:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:58,495 INFO L87 Difference]: Start difference. First operand 267 states and 396 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:58,695 INFO L93 Difference]: Finished difference Result 1051 states and 1566 transitions. [2022-11-03 02:08:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:08:58,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:08:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:58,702 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 02:08:58,702 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 02:08:58,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 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 02:08:58,705 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 1151 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:58,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 1542 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:08:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 02:08:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 273. [2022-11-03 02:08:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.4852941176470589) internal successors, (404), 272 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 404 transitions. [2022-11-03 02:08:58,732 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 404 transitions. Word has length 266 [2022-11-03 02:08:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:58,733 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 404 transitions. [2022-11-03 02:08:58,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 404 transitions. [2022-11-03 02:08:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:08:58,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:58,741 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:08:58,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:58,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:58,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:58,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1252934559, now seen corresponding path program 1 times [2022-11-03 02:08:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:58,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742116304] [2022-11-03 02:08:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:58,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:58,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:58,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:58,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:09:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:00,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:09:00,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:00,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:00,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:00,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742116304] [2022-11-03 02:09:00,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742116304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:00,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:00,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:00,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199281809] [2022-11-03 02:09:00,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:00,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:00,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:00,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:00,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:00,454 INFO L87 Difference]: Start difference. First operand 273 states and 404 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:00,680 INFO L93 Difference]: Finished difference Result 1060 states and 1576 transitions. [2022-11-03 02:09:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:00,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:00,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:00,685 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 02:09:00,686 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 02:09:00,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:00,688 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 1546 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:00,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1546 Valid, 2314 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 02:09:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 275. [2022-11-03 02:09:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.4817518248175183) internal successors, (406), 274 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:00,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 406 transitions. [2022-11-03 02:09:00,706 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 406 transitions. Word has length 266 [2022-11-03 02:09:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:00,707 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 406 transitions. [2022-11-03 02:09:00,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 406 transitions. [2022-11-03 02:09:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:00,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:00,714 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:00,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:00,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:00,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:00,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:00,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1428056861, now seen corresponding path program 1 times [2022-11-03 02:09:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:00,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483344114] [2022-11-03 02:09:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:00,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:00,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:00,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:00,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:09:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:02,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:09:02,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:02,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:02,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:02,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483344114] [2022-11-03 02:09:02,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483344114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:02,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:02,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:02,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253549091] [2022-11-03 02:09:02,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:02,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:02,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:02,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:02,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:02,319 INFO L87 Difference]: Start difference. First operand 275 states and 406 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:02,548 INFO L93 Difference]: Finished difference Result 1060 states and 1575 transitions. [2022-11-03 02:09:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:02,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:02,553 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 02:09:02,553 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 02:09:02,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:02,556 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1539 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1539 SdHoareTripleChecker+Valid, 2310 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:02,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1539 Valid, 2310 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:02,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 02:09:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 277. [2022-11-03 02:09:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.4782608695652173) internal successors, (408), 276 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 408 transitions. [2022-11-03 02:09:02,571 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 408 transitions. Word has length 266 [2022-11-03 02:09:02,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:02,572 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 408 transitions. [2022-11-03 02:09:02,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:02,572 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 408 transitions. [2022-11-03 02:09:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:02,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:02,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:02,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:02,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:02,801 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:02,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1271814683, now seen corresponding path program 1 times [2022-11-03 02:09:02,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:02,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579868036] [2022-11-03 02:09:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:02,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:02,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:02,809 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:02,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:09:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:04,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:09:04,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:04,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:04,226 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:04,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579868036] [2022-11-03 02:09:04,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579868036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:04,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:04,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:04,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304259254] [2022-11-03 02:09:04,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:04,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:04,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:04,232 INFO L87 Difference]: Start difference. First operand 277 states and 408 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:04,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:04,470 INFO L93 Difference]: Finished difference Result 1060 states and 1574 transitions. [2022-11-03 02:09:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:04,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:04,477 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 02:09:04,477 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 02:09:04,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:04,480 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 1532 mSDsluCounter, 1906 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:04,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1532 Valid, 2306 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:04,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 02:09:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 279. [2022-11-03 02:09:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.474820143884892) internal successors, (410), 278 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 410 transitions. [2022-11-03 02:09:04,518 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 410 transitions. Word has length 266 [2022-11-03 02:09:04,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:04,518 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 410 transitions. [2022-11-03 02:09:04,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 410 transitions. [2022-11-03 02:09:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:04,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:04,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:04,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-03 02:09:04,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:04,749 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:04,749 INFO L85 PathProgramCache]: Analyzing trace with hash -587853977, now seen corresponding path program 1 times [2022-11-03 02:09:04,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:04,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478215746] [2022-11-03 02:09:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:04,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:04,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:04,753 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:04,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:09:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:05,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:09:05,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:05,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:05,990 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:05,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478215746] [2022-11-03 02:09:05,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478215746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:05,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:05,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:05,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735564136] [2022-11-03 02:09:05,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:05,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:05,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:05,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:05,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:05,995 INFO L87 Difference]: Start difference. First operand 279 states and 410 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:06,200 INFO L93 Difference]: Finished difference Result 1060 states and 1573 transitions. [2022-11-03 02:09:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:06,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:06,205 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 02:09:06,206 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 02:09:06,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:06,208 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 1525 mSDsluCounter, 1900 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 2302 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:06,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1525 Valid, 2302 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:09:06,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 02:09:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 281. [2022-11-03 02:09:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.4714285714285715) internal successors, (412), 280 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 412 transitions. [2022-11-03 02:09:06,221 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 412 transitions. Word has length 266 [2022-11-03 02:09:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:06,222 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 412 transitions. [2022-11-03 02:09:06,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 412 transitions. [2022-11-03 02:09:06,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:06,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:06,227 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:06,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:06,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:06,441 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:06,442 INFO L85 PathProgramCache]: Analyzing trace with hash -815074967, now seen corresponding path program 1 times [2022-11-03 02:09:06,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:06,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357167179] [2022-11-03 02:09:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:06,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:06,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:06,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:06,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:09:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:07,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:09:07,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:07,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:07,819 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:07,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357167179] [2022-11-03 02:09:07,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357167179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:07,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:07,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:09:07,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786263146] [2022-11-03 02:09:07,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:07,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:09:07,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:07,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:09:07,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:09:07,822 INFO L87 Difference]: Start difference. First operand 281 states and 412 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:08,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:08,203 INFO L93 Difference]: Finished difference Result 1072 states and 1590 transitions. [2022-11-03 02:09:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:09:08,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:08,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:08,208 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 02:09:08,208 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 02:09:08,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:09:08,210 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 1915 mSDsluCounter, 2611 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:08,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1915 Valid, 3012 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:09:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 02:09:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 287. [2022-11-03 02:09:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.4685314685314685) internal successors, (420), 286 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 420 transitions. [2022-11-03 02:09:08,224 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 420 transitions. Word has length 266 [2022-11-03 02:09:08,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:08,224 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 420 transitions. [2022-11-03 02:09:08,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:08,225 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 420 transitions. [2022-11-03 02:09:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:08,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:08,229 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:08,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:08,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:08,449 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:08,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1806302443, now seen corresponding path program 1 times [2022-11-03 02:09:08,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:08,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35599025] [2022-11-03 02:09:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:08,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:08,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:08,454 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:08,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:09:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:09,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:09:09,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:09,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:09,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:09,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35599025] [2022-11-03 02:09:09,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35599025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:09,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:09,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:09,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585445954] [2022-11-03 02:09:09,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:09,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:09,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:09,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:09,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:09,811 INFO L87 Difference]: Start difference. First operand 287 states and 420 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:10,056 INFO L93 Difference]: Finished difference Result 1052 states and 1561 transitions. [2022-11-03 02:09:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:10,062 INFO L225 Difference]: With dead ends: 1052 [2022-11-03 02:09:10,062 INFO L226 Difference]: Without dead ends: 789 [2022-11-03 02:09:10,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:10,064 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1489 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:10,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 2267 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-11-03 02:09:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 289. [2022-11-03 02:09:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.4652777777777777) internal successors, (422), 288 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 422 transitions. [2022-11-03 02:09:10,077 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 422 transitions. Word has length 266 [2022-11-03 02:09:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:10,077 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 422 transitions. [2022-11-03 02:09:10,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:10,078 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 422 transitions. [2022-11-03 02:09:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:10,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:10,083 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:10,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:10,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:10,297 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1406796013, now seen corresponding path program 1 times [2022-11-03 02:09:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:10,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620170646] [2022-11-03 02:09:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:10,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:10,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:10,300 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:10,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:09:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:11,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:09:11,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:11,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:11,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:11,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620170646] [2022-11-03 02:09:11,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620170646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:11,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:11,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:09:11,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936053475] [2022-11-03 02:09:11,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:11,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:09:11,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:11,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:09:11,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:09:11,709 INFO L87 Difference]: Start difference. First operand 289 states and 422 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:12,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:12,907 INFO L93 Difference]: Finished difference Result 1072 states and 1588 transitions. [2022-11-03 02:09:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:09:12,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:12,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:12,913 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 02:09:12,913 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 02:09:12,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:09:12,915 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 1894 mSDsluCounter, 2324 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1894 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:12,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1894 Valid, 2659 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:09:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 02:09:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 291. [2022-11-03 02:09:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.4620689655172414) internal successors, (424), 290 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 424 transitions. [2022-11-03 02:09:12,929 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 424 transitions. Word has length 266 [2022-11-03 02:09:12,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:12,929 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 424 transitions. [2022-11-03 02:09:12,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 424 transitions. [2022-11-03 02:09:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:12,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:12,934 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:12,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:13,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:13,162 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:13,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:13,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1759452527, now seen corresponding path program 1 times [2022-11-03 02:09:13,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:13,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527926347] [2022-11-03 02:09:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:13,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:13,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:13,174 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:13,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:09:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:14,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:09:14,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:14,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:14,483 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:14,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527926347] [2022-11-03 02:09:14,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527926347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:14,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:14,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:09:14,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203983633] [2022-11-03 02:09:14,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:14,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:09:14,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:14,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:09:14,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:09:14,487 INFO L87 Difference]: Start difference. First operand 291 states and 424 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:14,824 INFO L93 Difference]: Finished difference Result 1060 states and 1569 transitions. [2022-11-03 02:09:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:09:14,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:14,828 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 02:09:14,829 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 02:09:14,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:09:14,831 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 1866 mSDsluCounter, 2575 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1866 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:14,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1866 Valid, 2978 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:14,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 02:09:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 293. [2022-11-03 02:09:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.4589041095890412) internal successors, (426), 292 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 426 transitions. [2022-11-03 02:09:14,844 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 426 transitions. Word has length 266 [2022-11-03 02:09:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:14,844 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 426 transitions. [2022-11-03 02:09:14,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 426 transitions. [2022-11-03 02:09:14,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:14,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:14,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:14,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:15,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:15,070 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:15,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1239059855, now seen corresponding path program 1 times [2022-11-03 02:09:15,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:15,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167585773] [2022-11-03 02:09:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:15,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:15,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:15,074 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:15,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:09:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:16,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:09:16,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:16,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:16,247 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:16,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167585773] [2022-11-03 02:09:16,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167585773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:16,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:16,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:16,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827445804] [2022-11-03 02:09:16,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:16,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:16,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:16,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:16,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:16,251 INFO L87 Difference]: Start difference. First operand 293 states and 426 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:16,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:16,552 INFO L93 Difference]: Finished difference Result 1060 states and 1568 transitions. [2022-11-03 02:09:16,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:16,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:16,557 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 02:09:16,557 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 02:09:16,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:16,559 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 1475 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 2239 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:16,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1475 Valid, 2239 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 02:09:16,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 297. [2022-11-03 02:09:16,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.4560810810810811) internal successors, (431), 296 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 431 transitions. [2022-11-03 02:09:16,574 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 431 transitions. Word has length 266 [2022-11-03 02:09:16,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:16,574 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 431 transitions. [2022-11-03 02:09:16,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 431 transitions. [2022-11-03 02:09:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:16,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:16,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:16,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:16,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:16,793 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:16,794 INFO L85 PathProgramCache]: Analyzing trace with hash -900556685, now seen corresponding path program 1 times [2022-11-03 02:09:16,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:16,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896990975] [2022-11-03 02:09:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:16,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:16,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:16,798 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:16,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:09:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:17,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:09:17,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:18,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:18,075 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:18,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896990975] [2022-11-03 02:09:18,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896990975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:18,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:18,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:09:18,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900242339] [2022-11-03 02:09:18,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:18,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:09:18,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:18,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:09:18,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:09:18,079 INFO L87 Difference]: Start difference. First operand 297 states and 431 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:18,791 INFO L93 Difference]: Finished difference Result 1051 states and 1556 transitions. [2022-11-03 02:09:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:09:18,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:18,795 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 02:09:18,795 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 02:09:18,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 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 02:09:18,796 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 1075 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:18,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 1330 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:09:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 02:09:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 299. [2022-11-03 02:09:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.4530201342281879) internal successors, (433), 298 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 433 transitions. [2022-11-03 02:09:18,811 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 433 transitions. Word has length 266 [2022-11-03 02:09:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:18,811 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 433 transitions. [2022-11-03 02:09:18,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 433 transitions. [2022-11-03 02:09:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:18,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:18,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:18,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:19,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:19,037 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:19,037 INFO L85 PathProgramCache]: Analyzing trace with hash -868919563, now seen corresponding path program 1 times [2022-11-03 02:09:19,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:19,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099461202] [2022-11-03 02:09:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:19,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:19,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:19,040 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:19,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:09:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:20,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:09:20,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:20,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:20,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:20,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099461202] [2022-11-03 02:09:20,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099461202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:20,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:20,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:20,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787274595] [2022-11-03 02:09:20,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:20,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:20,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:20,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:20,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:20,272 INFO L87 Difference]: Start difference. First operand 299 states and 433 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:21,035 INFO L93 Difference]: Finished difference Result 1086 states and 1605 transitions. [2022-11-03 02:09:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:21,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:21,040 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 02:09:21,040 INFO L226 Difference]: Without dead ends: 823 [2022-11-03 02:09:21,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:21,042 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 1508 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:21,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1508 Valid, 2099 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:09:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-11-03 02:09:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 301. [2022-11-03 02:09:21,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.45) internal successors, (435), 300 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:21,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 435 transitions. [2022-11-03 02:09:21,059 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 435 transitions. Word has length 266 [2022-11-03 02:09:21,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:21,060 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 435 transitions. [2022-11-03 02:09:21,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:21,061 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 435 transitions. [2022-11-03 02:09:21,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:21,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:21,063 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:21,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:21,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:21,289 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:21,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:21,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2057712137, now seen corresponding path program 1 times [2022-11-03 02:09:21,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:21,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158447868] [2022-11-03 02:09:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:21,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:21,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:21,292 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:21,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:09:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:22,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:09:22,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:22,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:22,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:22,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158447868] [2022-11-03 02:09:22,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158447868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:22,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:22,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:22,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542241304] [2022-11-03 02:09:22,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:22,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:22,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:22,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:22,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:22,488 INFO L87 Difference]: Start difference. First operand 301 states and 435 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:22,771 INFO L93 Difference]: Finished difference Result 1086 states and 1604 transitions. [2022-11-03 02:09:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:22,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:22,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:22,777 INFO L225 Difference]: With dead ends: 1086 [2022-11-03 02:09:22,777 INFO L226 Difference]: Without dead ends: 823 [2022-11-03 02:09:22,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:22,779 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 1498 mSDsluCounter, 1845 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:22,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 2265 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-11-03 02:09:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 305. [2022-11-03 02:09:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.4473684210526316) internal successors, (440), 304 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 440 transitions. [2022-11-03 02:09:22,811 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 440 transitions. Word has length 266 [2022-11-03 02:09:22,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:22,812 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 440 transitions. [2022-11-03 02:09:22,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 440 transitions. [2022-11-03 02:09:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:22,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:22,815 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:22,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:23,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:23,031 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:23,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:23,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1573262841, now seen corresponding path program 1 times [2022-11-03 02:09:23,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:23,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309174563] [2022-11-03 02:09:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:23,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:23,035 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:23,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:09:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:24,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:09:24,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:24,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:24,405 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:24,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309174563] [2022-11-03 02:09:24,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309174563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:24,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:24,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:09:24,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803775981] [2022-11-03 02:09:24,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:24,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:09:24,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:24,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:09:24,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:09:24,408 INFO L87 Difference]: Start difference. First operand 305 states and 440 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:25,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:25,097 INFO L93 Difference]: Finished difference Result 1051 states and 1553 transitions. [2022-11-03 02:09:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:09:25,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:25,101 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 02:09:25,102 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 02:09:25,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 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 02:09:25,103 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 1052 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:25,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 1327 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:09:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 02:09:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 307. [2022-11-03 02:09:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.4444444444444444) internal successors, (442), 306 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 442 transitions. [2022-11-03 02:09:25,116 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 442 transitions. Word has length 266 [2022-11-03 02:09:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:25,117 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 442 transitions. [2022-11-03 02:09:25,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 442 transitions. [2022-11-03 02:09:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:25,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:25,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:25,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:25,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:25,335 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash 222852731, now seen corresponding path program 1 times [2022-11-03 02:09:25,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:25,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761656879] [2022-11-03 02:09:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:25,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:25,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:25,340 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:25,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:09:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:26,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:09:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:26,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:26,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:26,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761656879] [2022-11-03 02:09:26,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761656879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:26,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:26,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:26,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844411582] [2022-11-03 02:09:26,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:26,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:26,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:26,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:26,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:26,607 INFO L87 Difference]: Start difference. First operand 307 states and 442 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:27,296 INFO L93 Difference]: Finished difference Result 1094 states and 1614 transitions. [2022-11-03 02:09:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:27,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:27,302 INFO L225 Difference]: With dead ends: 1094 [2022-11-03 02:09:27,302 INFO L226 Difference]: Without dead ends: 831 [2022-11-03 02:09:27,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:27,304 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1497 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:27,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1497 Valid, 2095 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:09:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-11-03 02:09:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 309. [2022-11-03 02:09:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.4415584415584415) internal successors, (444), 308 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 444 transitions. [2022-11-03 02:09:27,317 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 444 transitions. Word has length 266 [2022-11-03 02:09:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:27,317 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 444 transitions. [2022-11-03 02:09:27,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 444 transitions. [2022-11-03 02:09:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:27,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:27,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:27,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:27,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:27,545 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:27,545 INFO L85 PathProgramCache]: Analyzing trace with hash 999100285, now seen corresponding path program 1 times [2022-11-03 02:09:27,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:27,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391132979] [2022-11-03 02:09:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:27,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:27,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:27,549 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:27,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:09:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:09:28,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:28,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:28,820 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:28,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391132979] [2022-11-03 02:09:28,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391132979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:28,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:28,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:28,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10168119] [2022-11-03 02:09:28,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:28,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:28,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:28,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:28,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:28,825 INFO L87 Difference]: Start difference. First operand 309 states and 444 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:29,560 INFO L93 Difference]: Finished difference Result 1094 states and 1613 transitions. [2022-11-03 02:09:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:29,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:29,565 INFO L225 Difference]: With dead ends: 1094 [2022-11-03 02:09:29,565 INFO L226 Difference]: Without dead ends: 831 [2022-11-03 02:09:29,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:29,567 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 1490 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 2091 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:29,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1490 Valid, 2091 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:09:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-11-03 02:09:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 311. [2022-11-03 02:09:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.4387096774193548) internal successors, (446), 310 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:29,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 446 transitions. [2022-11-03 02:09:29,581 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 446 transitions. Word has length 266 [2022-11-03 02:09:29,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:29,581 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 446 transitions. [2022-11-03 02:09:29,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:29,582 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 446 transitions. [2022-11-03 02:09:29,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:29,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:29,584 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:29,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:29,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:29,798 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:29,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:29,798 INFO L85 PathProgramCache]: Analyzing trace with hash -859307777, now seen corresponding path program 1 times [2022-11-03 02:09:29,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:29,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437297719] [2022-11-03 02:09:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:29,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:29,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:29,801 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:29,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:09:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:30,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:09:30,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:31,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:31,006 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437297719] [2022-11-03 02:09:31,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437297719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:31,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:31,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:31,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600521695] [2022-11-03 02:09:31,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:31,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:31,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:31,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:31,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:31,010 INFO L87 Difference]: Start difference. First operand 311 states and 446 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:31,280 INFO L93 Difference]: Finished difference Result 1094 states and 1612 transitions. [2022-11-03 02:09:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:31,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:31,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:31,284 INFO L225 Difference]: With dead ends: 1094 [2022-11-03 02:09:31,285 INFO L226 Difference]: Without dead ends: 831 [2022-11-03 02:09:31,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:31,286 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1485 mSDsluCounter, 1832 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:31,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 2260 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-11-03 02:09:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 313. [2022-11-03 02:09:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.435897435897436) internal successors, (448), 312 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:31,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 448 transitions. [2022-11-03 02:09:31,298 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 448 transitions. Word has length 266 [2022-11-03 02:09:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:31,299 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 448 transitions. [2022-11-03 02:09:31,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:31,299 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 448 transitions. [2022-11-03 02:09:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:31,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:31,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:31,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:31,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:31,530 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:31,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1672833793, now seen corresponding path program 1 times [2022-11-03 02:09:31,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:31,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478597594] [2022-11-03 02:09:31,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:31,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:31,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:31,533 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:31,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:09:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:32,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:09:32,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:32,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:32,677 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:32,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478597594] [2022-11-03 02:09:32,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478597594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:32,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:32,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:09:32,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960222205] [2022-11-03 02:09:32,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:32,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:09:32,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:32,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:09:32,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:09:32,681 INFO L87 Difference]: Start difference. First operand 313 states and 448 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:32,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:32,948 INFO L93 Difference]: Finished difference Result 1076 states and 1584 transitions. [2022-11-03 02:09:32,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:09:32,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:32,953 INFO L225 Difference]: With dead ends: 1076 [2022-11-03 02:09:32,953 INFO L226 Difference]: Without dead ends: 813 [2022-11-03 02:09:32,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:09:32,955 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 1816 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1816 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:32,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1816 Valid, 2952 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:32,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-11-03 02:09:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 315. [2022-11-03 02:09:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.4331210191082802) internal successors, (450), 314 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 450 transitions. [2022-11-03 02:09:32,966 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 450 transitions. Word has length 266 [2022-11-03 02:09:32,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:32,967 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 450 transitions. [2022-11-03 02:09:32,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 450 transitions. [2022-11-03 02:09:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:32,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:32,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:33,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:33,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:33,185 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:33,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:33,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1670999427, now seen corresponding path program 1 times [2022-11-03 02:09:33,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:33,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358543426] [2022-11-03 02:09:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:33,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:33,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:33,191 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:33,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:09:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:34,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:09:34,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:34,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:34,376 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:34,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358543426] [2022-11-03 02:09:34,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358543426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:34,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:34,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:09:34,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175358915] [2022-11-03 02:09:34,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:34,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:09:34,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:34,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:09:34,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:09:34,379 INFO L87 Difference]: Start difference. First operand 315 states and 450 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:34,705 INFO L93 Difference]: Finished difference Result 1060 states and 1559 transitions. [2022-11-03 02:09:34,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:09:34,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:34,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:34,712 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 02:09:34,713 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 02:09:34,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:09:34,715 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 1771 mSDsluCounter, 2458 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1771 SdHoareTripleChecker+Valid, 2890 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:34,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1771 Valid, 2890 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 02:09:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 319. [2022-11-03 02:09:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.430817610062893) internal successors, (455), 318 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 455 transitions. [2022-11-03 02:09:34,727 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 455 transitions. Word has length 266 [2022-11-03 02:09:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:34,728 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 455 transitions. [2022-11-03 02:09:34,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:34,728 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 455 transitions. [2022-11-03 02:09:34,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:34,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:34,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:34,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:34,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:34,949 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1800864005, now seen corresponding path program 1 times [2022-11-03 02:09:34,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:34,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829709655] [2022-11-03 02:09:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:34,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:34,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:34,952 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:34,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:09:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:09:35,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:36,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:36,195 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:36,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829709655] [2022-11-03 02:09:36,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829709655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:36,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:36,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:36,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088333607] [2022-11-03 02:09:36,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:36,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:36,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:36,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:36,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:36,198 INFO L87 Difference]: Start difference. First operand 319 states and 455 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:36,504 INFO L93 Difference]: Finished difference Result 1102 states and 1621 transitions. [2022-11-03 02:09:36,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:36,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:36,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:36,509 INFO L225 Difference]: With dead ends: 1102 [2022-11-03 02:09:36,510 INFO L226 Difference]: Without dead ends: 839 [2022-11-03 02:09:36,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:36,512 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 1470 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1470 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:36,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1470 Valid, 2249 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:09:36,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-11-03 02:09:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 323. [2022-11-03 02:09:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.4285714285714286) internal successors, (460), 322 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 460 transitions. [2022-11-03 02:09:36,529 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 460 transitions. Word has length 266 [2022-11-03 02:09:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:36,529 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 460 transitions. [2022-11-03 02:09:36,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:36,530 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 460 transitions. [2022-11-03 02:09:36,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:36,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:36,532 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:36,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:36,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:36,756 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:36,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:36,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1079944583, now seen corresponding path program 1 times [2022-11-03 02:09:36,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:36,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099958753] [2022-11-03 02:09:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:36,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:36,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:36,760 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:36,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:09:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:09:37,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:38,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:38,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:38,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099958753] [2022-11-03 02:09:38,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099958753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:38,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:38,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:38,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413284893] [2022-11-03 02:09:38,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:38,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:38,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:38,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:38,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:38,046 INFO L87 Difference]: Start difference. First operand 323 states and 460 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:38,300 INFO L93 Difference]: Finished difference Result 1112 states and 1635 transitions. [2022-11-03 02:09:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:38,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:38,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:38,307 INFO L225 Difference]: With dead ends: 1112 [2022-11-03 02:09:38,307 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 02:09:38,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:38,309 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 1471 mSDsluCounter, 1809 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:38,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1471 Valid, 2257 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 02:09:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 329. [2022-11-03 02:09:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.4268292682926829) internal successors, (468), 328 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 468 transitions. [2022-11-03 02:09:38,321 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 468 transitions. Word has length 266 [2022-11-03 02:09:38,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:38,322 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 468 transitions. [2022-11-03 02:09:38,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:38,323 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 468 transitions. [2022-11-03 02:09:38,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:38,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:38,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:38,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 02:09:38,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:38,532 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:38,533 INFO L85 PathProgramCache]: Analyzing trace with hash -887860343, now seen corresponding path program 1 times [2022-11-03 02:09:38,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:38,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802825401] [2022-11-03 02:09:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:38,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:38,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:38,537 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:38,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:09:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:39,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:09:39,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:39,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:39,639 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:39,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802825401] [2022-11-03 02:09:39,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802825401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:39,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:39,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:09:39,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114685886] [2022-11-03 02:09:39,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:39,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:09:39,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:39,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:09:39,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:09:39,643 INFO L87 Difference]: Start difference. First operand 329 states and 468 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:39,720 INFO L93 Difference]: Finished difference Result 1051 states and 1545 transitions. [2022-11-03 02:09:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:09:39,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:39,725 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 02:09:39,725 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 02:09:39,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 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 02:09:39,732 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 980 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:39,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1524 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:09:39,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 02:09:39,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 333. [2022-11-03 02:09:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.4246987951807228) internal successors, (473), 332 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 473 transitions. [2022-11-03 02:09:39,746 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 473 transitions. Word has length 266 [2022-11-03 02:09:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:39,746 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 473 transitions. [2022-11-03 02:09:39,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 473 transitions. [2022-11-03 02:09:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:39,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:39,749 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:39,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:39,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:39,973 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:39,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1682264715, now seen corresponding path program 1 times [2022-11-03 02:09:39,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:39,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650516543] [2022-11-03 02:09:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:39,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:39,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:39,981 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:39,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:09:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:40,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:09:40,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:41,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:41,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:41,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650516543] [2022-11-03 02:09:41,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650516543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:41,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:41,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:41,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268640017] [2022-11-03 02:09:41,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:41,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:41,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:41,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:41,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:41,276 INFO L87 Difference]: Start difference. First operand 333 states and 473 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:41,552 INFO L93 Difference]: Finished difference Result 1120 states and 1645 transitions. [2022-11-03 02:09:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:41,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:41,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:41,557 INFO L225 Difference]: With dead ends: 1120 [2022-11-03 02:09:41,557 INFO L226 Difference]: Without dead ends: 857 [2022-11-03 02:09:41,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:41,559 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 1460 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 2253 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:41,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1460 Valid, 2253 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-11-03 02:09:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 337. [2022-11-03 02:09:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.4226190476190477) internal successors, (478), 336 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2022-11-03 02:09:41,571 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 266 [2022-11-03 02:09:41,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:41,572 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2022-11-03 02:09:41,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2022-11-03 02:09:41,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:41,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:41,576 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:41,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:41,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:41,796 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:41,797 INFO L85 PathProgramCache]: Analyzing trace with hash -398318963, now seen corresponding path program 1 times [2022-11-03 02:09:41,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:41,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534276538] [2022-11-03 02:09:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:41,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:41,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:41,802 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:41,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:09:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:42,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:09:42,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:43,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:43,334 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:43,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534276538] [2022-11-03 02:09:43,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534276538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:43,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:43,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:43,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335356068] [2022-11-03 02:09:43,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:43,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:43,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:43,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:43,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:43,338 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:43,625 INFO L93 Difference]: Finished difference Result 1052 states and 1544 transitions. [2022-11-03 02:09:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:43,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:43,628 INFO L225 Difference]: With dead ends: 1052 [2022-11-03 02:09:43,628 INFO L226 Difference]: Without dead ends: 789 [2022-11-03 02:09:43,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:43,630 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 1328 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1328 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:43,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1328 Valid, 2167 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-11-03 02:09:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 339. [2022-11-03 02:09:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.4201183431952662) internal successors, (480), 338 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:43,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 480 transitions. [2022-11-03 02:09:43,642 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 480 transitions. Word has length 266 [2022-11-03 02:09:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:43,643 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 480 transitions. [2022-11-03 02:09:43,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 480 transitions. [2022-11-03 02:09:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:43,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:43,645 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:43,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 02:09:43,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:43,875 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:43,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2111245071, now seen corresponding path program 1 times [2022-11-03 02:09:43,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:43,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124243101] [2022-11-03 02:09:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:43,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:43,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:43,879 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:43,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:09:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:44,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:09:44,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:45,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:45,215 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:45,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124243101] [2022-11-03 02:09:45,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124243101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:45,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:45,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:09:45,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402129186] [2022-11-03 02:09:45,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:45,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:09:45,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:45,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:09:45,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:09:45,220 INFO L87 Difference]: Start difference. First operand 339 states and 480 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:46,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:46,327 INFO L93 Difference]: Finished difference Result 1072 states and 1571 transitions. [2022-11-03 02:09:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:09:46,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:46,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:46,332 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 02:09:46,332 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 02:09:46,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:09:46,334 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1718 mSDsluCounter, 2103 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 2496 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:46,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 2496 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:09:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 02:09:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 341. [2022-11-03 02:09:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.4176470588235295) internal successors, (482), 340 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 482 transitions. [2022-11-03 02:09:46,347 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 482 transitions. Word has length 266 [2022-11-03 02:09:46,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:46,347 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 482 transitions. [2022-11-03 02:09:46,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 482 transitions. [2022-11-03 02:09:46,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:46,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:46,350 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:46,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 02:09:46,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:46,572 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:46,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2060440559, now seen corresponding path program 1 times [2022-11-03 02:09:46,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:46,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666662906] [2022-11-03 02:09:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:46,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:46,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:46,579 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:46,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:09:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:47,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:09:47,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:47,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:47,785 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:47,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666662906] [2022-11-03 02:09:47,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666662906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:47,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:47,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:09:47,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750980506] [2022-11-03 02:09:47,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:47,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:09:47,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:47,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:09:47,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:09:47,789 INFO L87 Difference]: Start difference. First operand 341 states and 482 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:48,121 INFO L93 Difference]: Finished difference Result 1060 states and 1552 transitions. [2022-11-03 02:09:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:09:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:48,125 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 02:09:48,125 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 02:09:48,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:09:48,127 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 1690 mSDsluCounter, 2352 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:48,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1690 Valid, 2813 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 02:09:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 343. [2022-11-03 02:09:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.4152046783625731) internal successors, (484), 342 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 484 transitions. [2022-11-03 02:09:48,139 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 484 transitions. Word has length 266 [2022-11-03 02:09:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:48,140 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 484 transitions. [2022-11-03 02:09:48,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 484 transitions. [2022-11-03 02:09:48,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:48,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:48,143 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:48,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-03 02:09:48,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:48,356 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:48,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:48,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1157519981, now seen corresponding path program 1 times [2022-11-03 02:09:48,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:48,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060710319] [2022-11-03 02:09:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:48,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:48,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:48,361 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:48,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:09:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:49,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:09:49,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:49,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:49,673 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:49,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060710319] [2022-11-03 02:09:49,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060710319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:49,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:49,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:49,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654664536] [2022-11-03 02:09:49,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:49,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:49,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:49,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:49,675 INFO L87 Difference]: Start difference. First operand 343 states and 484 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:49,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:49,947 INFO L93 Difference]: Finished difference Result 1126 states and 1650 transitions. [2022-11-03 02:09:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:49,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:49,951 INFO L225 Difference]: With dead ends: 1126 [2022-11-03 02:09:49,952 INFO L226 Difference]: Without dead ends: 863 [2022-11-03 02:09:49,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:49,953 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 1443 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2241 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:49,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1443 Valid, 2241 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-03 02:09:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 345. [2022-11-03 02:09:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.4127906976744187) internal successors, (486), 344 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 486 transitions. [2022-11-03 02:09:49,965 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 486 transitions. Word has length 266 [2022-11-03 02:09:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:49,965 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 486 transitions. [2022-11-03 02:09:49,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 486 transitions. [2022-11-03 02:09:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:49,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:49,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:49,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 02:09:50,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:50,192 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1165518955, now seen corresponding path program 1 times [2022-11-03 02:09:50,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:50,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122324412] [2022-11-03 02:09:50,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:50,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:50,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:50,196 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:50,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:09:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:51,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:09:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:51,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:51,513 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:51,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122324412] [2022-11-03 02:09:51,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122324412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:51,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:51,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:51,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595872559] [2022-11-03 02:09:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:51,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:51,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:51,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:51,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:51,516 INFO L87 Difference]: Start difference. First operand 345 states and 486 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:51,803 INFO L93 Difference]: Finished difference Result 1052 states and 1540 transitions. [2022-11-03 02:09:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:51,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:51,806 INFO L225 Difference]: With dead ends: 1052 [2022-11-03 02:09:51,806 INFO L226 Difference]: Without dead ends: 789 [2022-11-03 02:09:51,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:51,807 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 1300 mSDsluCounter, 1680 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:51,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1300 Valid, 2152 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-11-03 02:09:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 347. [2022-11-03 02:09:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.4104046242774566) internal successors, (488), 346 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 488 transitions. [2022-11-03 02:09:51,819 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 488 transitions. Word has length 266 [2022-11-03 02:09:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:51,824 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 488 transitions. [2022-11-03 02:09:51,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 488 transitions. [2022-11-03 02:09:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:51,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:51,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:51,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-03 02:09:52,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:52,049 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:52,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:52,049 INFO L85 PathProgramCache]: Analyzing trace with hash -7986665, now seen corresponding path program 1 times [2022-11-03 02:09:52,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:52,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983827572] [2022-11-03 02:09:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:52,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:52,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:52,052 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:52,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:09:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:53,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:09:53,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:53,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:53,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:53,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983827572] [2022-11-03 02:09:53,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983827572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:53,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:53,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:09:53,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439840593] [2022-11-03 02:09:53,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:53,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:09:53,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:53,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:09:53,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:09:53,416 INFO L87 Difference]: Start difference. First operand 347 states and 488 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:53,769 INFO L93 Difference]: Finished difference Result 874 states and 1273 transitions. [2022-11-03 02:09:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:09:53,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:53,772 INFO L225 Difference]: With dead ends: 874 [2022-11-03 02:09:53,772 INFO L226 Difference]: Without dead ends: 611 [2022-11-03 02:09:53,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:09:53,773 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 1416 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:53,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1416 Valid, 1991 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:09:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-03 02:09:53,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 349. [2022-11-03 02:09:53,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4080459770114941) internal successors, (490), 348 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 490 transitions. [2022-11-03 02:09:53,783 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 490 transitions. Word has length 266 [2022-11-03 02:09:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:53,784 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 490 transitions. [2022-11-03 02:09:53,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 490 transitions. [2022-11-03 02:09:53,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:53,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:53,786 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:53,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 02:09:54,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:54,001 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:54,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1765613803, now seen corresponding path program 1 times [2022-11-03 02:09:54,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:54,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956224172] [2022-11-03 02:09:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:54,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:54,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:54,004 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:54,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:09:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:54,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:09:54,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:55,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:55,271 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:55,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956224172] [2022-11-03 02:09:55,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956224172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:55,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:55,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:09:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086291335] [2022-11-03 02:09:55,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:55,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:09:55,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:09:55,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:09:55,273 INFO L87 Difference]: Start difference. First operand 349 states and 490 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:56,362 INFO L93 Difference]: Finished difference Result 1072 states and 1566 transitions. [2022-11-03 02:09:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:09:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:56,366 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 02:09:56,367 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 02:09:56,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:09:56,368 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 1678 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 2462 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:56,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1678 Valid, 2462 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:09:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 02:09:56,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 351. [2022-11-03 02:09:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.4057142857142857) internal successors, (492), 350 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 492 transitions. [2022-11-03 02:09:56,380 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 492 transitions. Word has length 266 [2022-11-03 02:09:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:56,380 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 492 transitions. [2022-11-03 02:09:56,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:56,381 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 492 transitions. [2022-11-03 02:09:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:56,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:56,383 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:56,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:56,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:56,596 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:56,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1713306263, now seen corresponding path program 1 times [2022-11-03 02:09:56,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:56,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581214183] [2022-11-03 02:09:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:56,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:56,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:56,601 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:56,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:09:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:57,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:09:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:57,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:57,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:57,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581214183] [2022-11-03 02:09:57,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581214183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:57,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:57,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:09:57,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578007889] [2022-11-03 02:09:57,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:57,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:09:57,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:57,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:09:57,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:09:57,841 INFO L87 Difference]: Start difference. First operand 351 states and 492 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:58,136 INFO L93 Difference]: Finished difference Result 1060 states and 1547 transitions. [2022-11-03 02:09:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:09:58,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:58,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:58,140 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 02:09:58,140 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 02:09:58,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:09:58,142 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 1650 mSDsluCounter, 2307 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 2778 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:58,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1650 Valid, 2778 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 02:09:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 353. [2022-11-03 02:09:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.4034090909090908) internal successors, (494), 352 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 494 transitions. [2022-11-03 02:09:58,154 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 494 transitions. Word has length 266 [2022-11-03 02:09:58,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:58,154 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 494 transitions. [2022-11-03 02:09:58,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 494 transitions. [2022-11-03 02:09:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:58,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:58,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:58,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-03 02:09:58,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:09:58,366 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:58,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:58,367 INFO L85 PathProgramCache]: Analyzing trace with hash -982511975, now seen corresponding path program 1 times [2022-11-03 02:09:58,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:58,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050851481] [2022-11-03 02:09:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:58,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:58,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:58,370 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:58,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:09:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:59,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:09:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:09:59,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:09:59,688 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:59,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050851481] [2022-11-03 02:09:59,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050851481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:59,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:59,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:09:59,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869518800] [2022-11-03 02:09:59,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:59,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:09:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:09:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:09:59,690 INFO L87 Difference]: Start difference. First operand 353 states and 494 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:59,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:59,938 INFO L93 Difference]: Finished difference Result 1134 states and 1657 transitions. [2022-11-03 02:09:59,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:09:59,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:09:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:59,940 INFO L225 Difference]: With dead ends: 1134 [2022-11-03 02:09:59,941 INFO L226 Difference]: Without dead ends: 871 [2022-11-03 02:09:59,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:09:59,942 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1424 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:59,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1424 Valid, 2232 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:09:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-11-03 02:09:59,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 355. [2022-11-03 02:09:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.4011299435028248) internal successors, (496), 354 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 496 transitions. [2022-11-03 02:09:59,953 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 496 transitions. Word has length 266 [2022-11-03 02:09:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:59,953 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 496 transitions. [2022-11-03 02:09:59,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 496 transitions. [2022-11-03 02:09:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:09:59,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:59,956 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:59,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:00,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:00,179 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:00,179 INFO L85 PathProgramCache]: Analyzing trace with hash -962970853, now seen corresponding path program 1 times [2022-11-03 02:10:00,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:00,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039107330] [2022-11-03 02:10:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:00,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:00,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:00,182 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:00,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:10:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:01,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:10:01,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:01,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:01,760 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:01,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039107330] [2022-11-03 02:10:01,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039107330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:01,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:01,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:10:01,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661247768] [2022-11-03 02:10:01,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:01,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:10:01,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:01,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:10:01,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:10:01,762 INFO L87 Difference]: Start difference. First operand 355 states and 496 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:02,000 INFO L93 Difference]: Finished difference Result 1051 states and 1534 transitions. [2022-11-03 02:10:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:10:02,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:02,003 INFO L225 Difference]: With dead ends: 1051 [2022-11-03 02:10:02,003 INFO L226 Difference]: Without dead ends: 788 [2022-11-03 02:10:02,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 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 02:10:02,005 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 908 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:02,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1494 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:10:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-03 02:10:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 357. [2022-11-03 02:10:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.398876404494382) internal successors, (498), 356 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 498 transitions. [2022-11-03 02:10:02,016 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 498 transitions. Word has length 266 [2022-11-03 02:10:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:02,017 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 498 transitions. [2022-11-03 02:10:02,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 498 transitions. [2022-11-03 02:10:02,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:02,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:02,019 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:02,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 02:10:02,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:02,236 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash -435576803, now seen corresponding path program 1 times [2022-11-03 02:10:02,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:02,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051050046] [2022-11-03 02:10:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:02,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:02,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:02,240 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:02,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:10:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:03,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:10:03,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:03,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:03,459 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:03,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051050046] [2022-11-03 02:10:03,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051050046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:03,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:03,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:10:03,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013369471] [2022-11-03 02:10:03,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:03,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:10:03,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:03,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:10:03,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:03,462 INFO L87 Difference]: Start difference. First operand 357 states and 498 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:03,764 INFO L93 Difference]: Finished difference Result 1060 states and 1544 transitions. [2022-11-03 02:10:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:10:03,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:03,770 INFO L225 Difference]: With dead ends: 1060 [2022-11-03 02:10:03,770 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 02:10:03,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:10:03,772 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 1626 mSDsluCounter, 2280 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1626 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:03,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1626 Valid, 2757 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:10:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 02:10:03,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 359. [2022-11-03 02:10:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.3966480446927374) internal successors, (500), 358 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 500 transitions. [2022-11-03 02:10:03,794 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 500 transitions. Word has length 266 [2022-11-03 02:10:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:03,795 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 500 transitions. [2022-11-03 02:10:03,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 500 transitions. [2022-11-03 02:10:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:03,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:03,798 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:03,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:04,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:04,026 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:04,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:04,026 INFO L85 PathProgramCache]: Analyzing trace with hash 213015967, now seen corresponding path program 1 times [2022-11-03 02:10:04,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:04,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120838643] [2022-11-03 02:10:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:04,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:04,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:04,029 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:04,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:10:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:04,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:10:04,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:05,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:05,405 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:05,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120838643] [2022-11-03 02:10:05,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120838643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:05,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:05,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:10:05,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265957561] [2022-11-03 02:10:05,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:05,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:10:05,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:05,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:10:05,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:10:05,408 INFO L87 Difference]: Start difference. First operand 359 states and 500 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:05,689 INFO L93 Difference]: Finished difference Result 1144 states and 1669 transitions. [2022-11-03 02:10:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:05,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:05,693 INFO L225 Difference]: With dead ends: 1144 [2022-11-03 02:10:05,693 INFO L226 Difference]: Without dead ends: 881 [2022-11-03 02:10:05,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:05,697 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 1423 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 2234 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:05,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1423 Valid, 2234 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:10:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-11-03 02:10:05,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 361. [2022-11-03 02:10:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.3944444444444444) internal successors, (502), 360 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 502 transitions. [2022-11-03 02:10:05,707 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 502 transitions. Word has length 266 [2022-11-03 02:10:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:05,708 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 502 transitions. [2022-11-03 02:10:05,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 502 transitions. [2022-11-03 02:10:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:05,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:05,710 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:05,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:05,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:05,938 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:05,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:05,939 INFO L85 PathProgramCache]: Analyzing trace with hash 303076257, now seen corresponding path program 1 times [2022-11-03 02:10:05,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:05,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445725924] [2022-11-03 02:10:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:05,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:05,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:05,943 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:05,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:10:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:06,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:10:06,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:07,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:07,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:07,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445725924] [2022-11-03 02:10:07,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445725924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:07,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:07,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:10:07,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755153820] [2022-11-03 02:10:07,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:07,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:10:07,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:07,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:10:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:10:07,190 INFO L87 Difference]: Start difference. First operand 361 states and 502 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:08,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:08,216 INFO L93 Difference]: Finished difference Result 1714 states and 2514 transitions. [2022-11-03 02:10:08,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:10:08,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:08,220 INFO L225 Difference]: With dead ends: 1714 [2022-11-03 02:10:08,220 INFO L226 Difference]: Without dead ends: 1451 [2022-11-03 02:10:08,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:10:08,222 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 3510 mSDsluCounter, 5131 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3510 SdHoareTripleChecker+Valid, 5629 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:08,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3510 Valid, 5629 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-11-03 02:10:08,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 379. [2022-11-03 02:10:08,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.3968253968253967) internal successors, (528), 378 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 528 transitions. [2022-11-03 02:10:08,239 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 528 transitions. Word has length 266 [2022-11-03 02:10:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:08,239 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 528 transitions. [2022-11-03 02:10:08,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 528 transitions. [2022-11-03 02:10:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:08,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:08,242 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:08,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:08,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:08,456 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:08,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:08,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1104649693, now seen corresponding path program 1 times [2022-11-03 02:10:08,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:08,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235858828] [2022-11-03 02:10:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:08,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:08,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:08,461 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:08,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:10:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:09,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:10:09,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:10,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:10,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:10,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235858828] [2022-11-03 02:10:10,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235858828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:10,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:10,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:10:10,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452656857] [2022-11-03 02:10:10,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:10,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:10:10,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:10,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:10:10,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:10:10,290 INFO L87 Difference]: Start difference. First operand 379 states and 528 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:10,612 INFO L93 Difference]: Finished difference Result 1209 states and 1761 transitions. [2022-11-03 02:10:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:10,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:10,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:10,615 INFO L225 Difference]: With dead ends: 1209 [2022-11-03 02:10:10,615 INFO L226 Difference]: Without dead ends: 928 [2022-11-03 02:10:10,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:10,616 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 1407 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2245 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:10,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2245 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:10:10,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-11-03 02:10:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 383. [2022-11-03 02:10:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.3926701570680629) internal successors, (532), 382 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 532 transitions. [2022-11-03 02:10:10,629 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 532 transitions. Word has length 266 [2022-11-03 02:10:10,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:10,629 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 532 transitions. [2022-11-03 02:10:10,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:10,630 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 532 transitions. [2022-11-03 02:10:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:10,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:10,631 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:10,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 02:10:10,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:10,832 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1267067173, now seen corresponding path program 1 times [2022-11-03 02:10:10,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:10,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459212909] [2022-11-03 02:10:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:10,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:10,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:10,836 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:10,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:10:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:11,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:10:11,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:12,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:12,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:12,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459212909] [2022-11-03 02:10:12,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459212909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:12,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:12,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:10:12,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989955152] [2022-11-03 02:10:12,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:12,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:10:12,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:12,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:10:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:10:12,194 INFO L87 Difference]: Start difference. First operand 383 states and 532 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:12,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:12,457 INFO L93 Difference]: Finished difference Result 1224 states and 1782 transitions. [2022-11-03 02:10:12,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:12,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:12,460 INFO L225 Difference]: With dead ends: 1224 [2022-11-03 02:10:12,460 INFO L226 Difference]: Without dead ends: 943 [2022-11-03 02:10:12,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:12,462 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 1413 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:12,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 2230 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:10:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-11-03 02:10:12,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 387. [2022-11-03 02:10:12,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.3911917098445596) internal successors, (537), 386 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 537 transitions. [2022-11-03 02:10:12,474 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 537 transitions. Word has length 266 [2022-11-03 02:10:12,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:12,475 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 537 transitions. [2022-11-03 02:10:12,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:12,476 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 537 transitions. [2022-11-03 02:10:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:12,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:12,478 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:12,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 02:10:12,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:12,697 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1624030937, now seen corresponding path program 1 times [2022-11-03 02:10:12,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:12,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178758982] [2022-11-03 02:10:12,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:12,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:12,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:12,700 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:12,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:10:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:13,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:10:13,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:13,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:13,945 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:13,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178758982] [2022-11-03 02:10:13,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178758982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:13,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:13,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:10:13,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578770869] [2022-11-03 02:10:13,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:13,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:10:13,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:13,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:10:13,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:10:13,948 INFO L87 Difference]: Start difference. First operand 387 states and 537 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:14,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:14,813 INFO L93 Difference]: Finished difference Result 1748 states and 2559 transitions. [2022-11-03 02:10:14,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:10:14,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:14,817 INFO L225 Difference]: With dead ends: 1748 [2022-11-03 02:10:14,817 INFO L226 Difference]: Without dead ends: 1467 [2022-11-03 02:10:14,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:10:14,819 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 4141 mSDsluCounter, 5134 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4141 SdHoareTripleChecker+Valid, 5654 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:14,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4141 Valid, 5654 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-11-03 02:10:14,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 395. [2022-11-03 02:10:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.3908629441624365) internal successors, (548), 394 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 548 transitions. [2022-11-03 02:10:14,834 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 548 transitions. Word has length 266 [2022-11-03 02:10:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:14,834 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 548 transitions. [2022-11-03 02:10:14,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:14,835 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 548 transitions. [2022-11-03 02:10:14,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:14,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:14,837 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:14,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 02:10:15,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:15,053 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:15,053 INFO L85 PathProgramCache]: Analyzing trace with hash -956649047, now seen corresponding path program 1 times [2022-11-03 02:10:15,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:15,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085450095] [2022-11-03 02:10:15,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:15,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:15,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:15,057 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:15,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:10:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:15,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:10:15,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:16,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:16,302 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:16,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085450095] [2022-11-03 02:10:16,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085450095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:16,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:16,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:10:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583908472] [2022-11-03 02:10:16,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:16,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:10:16,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:16,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:10:16,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:16,304 INFO L87 Difference]: Start difference. First operand 395 states and 548 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:16,645 INFO L93 Difference]: Finished difference Result 1204 states and 1748 transitions. [2022-11-03 02:10:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:10:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:16,648 INFO L225 Difference]: With dead ends: 1204 [2022-11-03 02:10:16,648 INFO L226 Difference]: Without dead ends: 915 [2022-11-03 02:10:16,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:10:16,649 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 1694 mSDsluCounter, 2325 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 2823 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:16,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1694 Valid, 2823 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:10:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-11-03 02:10:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 399. [2022-11-03 02:10:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.3869346733668342) internal successors, (552), 398 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 552 transitions. [2022-11-03 02:10:16,660 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 552 transitions. Word has length 266 [2022-11-03 02:10:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:16,661 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 552 transitions. [2022-11-03 02:10:16,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 552 transitions. [2022-11-03 02:10:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:16,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:16,663 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:16,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 02:10:16,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:16,880 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:16,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash -611820885, now seen corresponding path program 1 times [2022-11-03 02:10:16,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:16,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055340496] [2022-11-03 02:10:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:16,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:16,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:16,884 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:16,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 02:10:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:17,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:10:17,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:18,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:18,211 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:18,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055340496] [2022-11-03 02:10:18,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055340496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:18,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:18,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:10:18,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707029958] [2022-11-03 02:10:18,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:18,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:10:18,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:10:18,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:18,213 INFO L87 Difference]: Start difference. First operand 399 states and 552 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:19,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:19,203 INFO L93 Difference]: Finished difference Result 1150 states and 1666 transitions. [2022-11-03 02:10:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:10:19,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:19,206 INFO L225 Difference]: With dead ends: 1150 [2022-11-03 02:10:19,206 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 02:10:19,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:10:19,207 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1585 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 2382 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:19,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1585 Valid, 2382 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:10:19,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 02:10:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 401. [2022-11-03 02:10:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.385) internal successors, (554), 400 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 554 transitions. [2022-11-03 02:10:19,231 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 554 transitions. Word has length 266 [2022-11-03 02:10:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:19,232 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 554 transitions. [2022-11-03 02:10:19,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 554 transitions. [2022-11-03 02:10:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:19,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:19,234 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:19,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:19,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:19,456 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1913674797, now seen corresponding path program 1 times [2022-11-03 02:10:19,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:19,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530157814] [2022-11-03 02:10:19,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:19,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:19,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:19,460 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:19,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:10:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:20,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:10:20,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:20,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:20,625 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:20,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530157814] [2022-11-03 02:10:20,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530157814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:20,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:20,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:10:20,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094609261] [2022-11-03 02:10:20,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:20,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:10:20,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:20,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:10:20,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:20,628 INFO L87 Difference]: Start difference. First operand 401 states and 554 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:20,957 INFO L93 Difference]: Finished difference Result 1138 states and 1647 transitions. [2022-11-03 02:10:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:10:20,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:20,960 INFO L225 Difference]: With dead ends: 1138 [2022-11-03 02:10:20,960 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 02:10:20,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:10:20,961 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 1557 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 2695 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:20,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1557 Valid, 2695 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:10:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 02:10:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 403. [2022-11-03 02:10:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.3830845771144278) internal successors, (556), 402 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 556 transitions. [2022-11-03 02:10:20,975 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 556 transitions. Word has length 266 [2022-11-03 02:10:20,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:20,975 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 556 transitions. [2022-11-03 02:10:20,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:20,976 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 556 transitions. [2022-11-03 02:10:20,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:20,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:20,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:21,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:21,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:21,192 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:21,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:21,193 INFO L85 PathProgramCache]: Analyzing trace with hash 508483119, now seen corresponding path program 1 times [2022-11-03 02:10:21,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:21,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492956509] [2022-11-03 02:10:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:21,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:21,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:21,196 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:21,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:10:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:22,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:10:22,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:22,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:22,516 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:22,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492956509] [2022-11-03 02:10:22,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492956509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:22,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:22,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:10:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642868571] [2022-11-03 02:10:22,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:22,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:10:22,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:10:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:10:22,519 INFO L87 Difference]: Start difference. First operand 403 states and 556 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:22,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:22,784 INFO L93 Difference]: Finished difference Result 1264 states and 1833 transitions. [2022-11-03 02:10:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:22,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:22,786 INFO L225 Difference]: With dead ends: 1264 [2022-11-03 02:10:22,786 INFO L226 Difference]: Without dead ends: 975 [2022-11-03 02:10:22,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:22,787 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 1393 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 2221 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:22,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 2221 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:10:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-11-03 02:10:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 405. [2022-11-03 02:10:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.381188118811881) internal successors, (558), 404 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 558 transitions. [2022-11-03 02:10:22,799 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 558 transitions. Word has length 266 [2022-11-03 02:10:22,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:22,799 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 558 transitions. [2022-11-03 02:10:22,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 558 transitions. [2022-11-03 02:10:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:22,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:22,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:22,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-03 02:10:23,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:23,025 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1955063985, now seen corresponding path program 1 times [2022-11-03 02:10:23,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:23,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390946616] [2022-11-03 02:10:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:23,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:23,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:23,028 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:23,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 02:10:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:23,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:10:23,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:24,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:24,339 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:24,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390946616] [2022-11-03 02:10:24,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390946616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:24,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:24,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:10:24,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410181701] [2022-11-03 02:10:24,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:24,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:10:24,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:10:24,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:24,341 INFO L87 Difference]: Start difference. First operand 405 states and 558 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:25,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:25,278 INFO L93 Difference]: Finished difference Result 1150 states and 1663 transitions. [2022-11-03 02:10:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:10:25,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:25,280 INFO L225 Difference]: With dead ends: 1150 [2022-11-03 02:10:25,280 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 02:10:25,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:10:25,281 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 1551 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 2350 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:25,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1551 Valid, 2350 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:10:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 02:10:25,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 411. [2022-11-03 02:10:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.3804878048780487) internal successors, (566), 410 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 566 transitions. [2022-11-03 02:10:25,293 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 566 transitions. Word has length 266 [2022-11-03 02:10:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:25,294 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 566 transitions. [2022-11-03 02:10:25,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 566 transitions. [2022-11-03 02:10:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:25,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:25,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:25,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:25,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:25,512 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:25,513 INFO L85 PathProgramCache]: Analyzing trace with hash -442923853, now seen corresponding path program 1 times [2022-11-03 02:10:25,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:25,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663474580] [2022-11-03 02:10:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:25,515 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:25,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:25,516 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:25,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 02:10:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:10:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:26,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:26,673 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:26,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663474580] [2022-11-03 02:10:26,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663474580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:26,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:26,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:10:26,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914126977] [2022-11-03 02:10:26,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:26,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:10:26,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:10:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:26,675 INFO L87 Difference]: Start difference. First operand 411 states and 566 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:26,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:26,973 INFO L93 Difference]: Finished difference Result 1138 states and 1644 transitions. [2022-11-03 02:10:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:10:26,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:26,975 INFO L225 Difference]: With dead ends: 1138 [2022-11-03 02:10:26,975 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 02:10:26,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:10:26,976 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 1523 mSDsluCounter, 2154 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 2662 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:26,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 2662 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:10:26,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 02:10:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 413. [2022-11-03 02:10:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.3786407766990292) internal successors, (568), 412 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 568 transitions. [2022-11-03 02:10:26,985 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 568 transitions. Word has length 266 [2022-11-03 02:10:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:26,986 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 568 transitions. [2022-11-03 02:10:26,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 568 transitions. [2022-11-03 02:10:26,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:26,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:26,989 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:27,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:27,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:27,203 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash -16369355, now seen corresponding path program 1 times [2022-11-03 02:10:27,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:27,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434527242] [2022-11-03 02:10:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:27,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:27,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:27,206 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:27,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:10:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:28,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:10:28,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:28,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:28,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:28,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434527242] [2022-11-03 02:10:28,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434527242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:28,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:28,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:10:28,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772352397] [2022-11-03 02:10:28,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:28,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:10:28,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:28,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:10:28,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:10:28,667 INFO L87 Difference]: Start difference. First operand 413 states and 568 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:28,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:28,937 INFO L93 Difference]: Finished difference Result 1272 states and 1842 transitions. [2022-11-03 02:10:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:28,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:28,939 INFO L225 Difference]: With dead ends: 1272 [2022-11-03 02:10:28,940 INFO L226 Difference]: Without dead ends: 983 [2022-11-03 02:10:28,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:28,941 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 1378 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:28,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1378 Valid, 2214 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:10:28,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-11-03 02:10:28,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 415. [2022-11-03 02:10:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.3768115942028984) internal successors, (570), 414 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 570 transitions. [2022-11-03 02:10:28,955 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 570 transitions. Word has length 266 [2022-11-03 02:10:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:28,955 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 570 transitions. [2022-11-03 02:10:28,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 570 transitions. [2022-11-03 02:10:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:28,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:28,958 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:28,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:29,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:29,172 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:29,172 INFO L85 PathProgramCache]: Analyzing trace with hash -172349897, now seen corresponding path program 1 times [2022-11-03 02:10:29,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:29,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411325909] [2022-11-03 02:10:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:29,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:29,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:29,176 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:29,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 02:10:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:30,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:10:30,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:30,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:30,832 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:30,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411325909] [2022-11-03 02:10:30,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411325909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:30,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:30,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:10:30,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336066393] [2022-11-03 02:10:30,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:30,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:10:30,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:30,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:10:30,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:10:30,836 INFO L87 Difference]: Start difference. First operand 415 states and 570 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:31,148 INFO L93 Difference]: Finished difference Result 1233 states and 1784 transitions. [2022-11-03 02:10:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:31,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:31,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:31,151 INFO L225 Difference]: With dead ends: 1233 [2022-11-03 02:10:31,151 INFO L226 Difference]: Without dead ends: 944 [2022-11-03 02:10:31,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:31,152 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1322 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:31,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 2196 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:10:31,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-11-03 02:10:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 417. [2022-11-03 02:10:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.375) internal successors, (572), 416 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:31,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 572 transitions. [2022-11-03 02:10:31,164 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 572 transitions. Word has length 266 [2022-11-03 02:10:31,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:31,164 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 572 transitions. [2022-11-03 02:10:31,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:31,165 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 572 transitions. [2022-11-03 02:10:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:31,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:31,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:31,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-03 02:10:31,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:31,367 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:31,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1960219719, now seen corresponding path program 1 times [2022-11-03 02:10:31,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:31,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714182048] [2022-11-03 02:10:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:31,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:31,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:31,371 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:31,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 02:10:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:32,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:10:32,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:32,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:32,535 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714182048] [2022-11-03 02:10:32,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714182048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:32,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:32,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:10:32,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8375142] [2022-11-03 02:10:32,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:32,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:10:32,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:32,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:10:32,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:10:32,537 INFO L87 Difference]: Start difference. First operand 417 states and 572 transitions. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:32,828 INFO L93 Difference]: Finished difference Result 1138 states and 1641 transitions. [2022-11-03 02:10:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:10:32,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:32,831 INFO L225 Difference]: With dead ends: 1138 [2022-11-03 02:10:32,831 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 02:10:32,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:10:32,833 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 1499 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:32,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1499 Valid, 2641 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:10:32,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 02:10:32,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 419. [2022-11-03 02:10:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.3732057416267942) internal successors, (574), 418 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 574 transitions. [2022-11-03 02:10:32,846 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 574 transitions. Word has length 266 [2022-11-03 02:10:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:32,847 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 574 transitions. [2022-11-03 02:10:32,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 574 transitions. [2022-11-03 02:10:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:32,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:32,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:32,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:33,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:33,073 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:33,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1890571845, now seen corresponding path program 1 times [2022-11-03 02:10:33,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:33,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747958647] [2022-11-03 02:10:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:33,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:33,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:33,077 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:33,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 02:10:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:34,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:10:34,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:34,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:34,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:34,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747958647] [2022-11-03 02:10:34,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747958647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:34,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:34,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:10:34,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192479757] [2022-11-03 02:10:34,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:34,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:10:34,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:34,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:10:34,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:10:34,601 INFO L87 Difference]: Start difference. First operand 419 states and 574 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:34,870 INFO L93 Difference]: Finished difference Result 1282 states and 1854 transitions. [2022-11-03 02:10:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:34,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:34,872 INFO L225 Difference]: With dead ends: 1282 [2022-11-03 02:10:34,872 INFO L226 Difference]: Without dead ends: 993 [2022-11-03 02:10:34,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:10:34,873 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1375 mSDsluCounter, 1698 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 2216 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:34,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1375 Valid, 2216 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:10:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-11-03 02:10:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 421. [2022-11-03 02:10:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.3714285714285714) internal successors, (576), 420 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 576 transitions. [2022-11-03 02:10:34,886 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 576 transitions. Word has length 266 [2022-11-03 02:10:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:34,886 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 576 transitions. [2022-11-03 02:10:34,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 576 transitions. [2022-11-03 02:10:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:34,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:34,889 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:34,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:35,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:35,112 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:35,113 INFO L85 PathProgramCache]: Analyzing trace with hash -491618243, now seen corresponding path program 1 times [2022-11-03 02:10:35,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:35,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638743877] [2022-11-03 02:10:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:35,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:35,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:35,117 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:35,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 02:10:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:10:36,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:36,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:36,359 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:36,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638743877] [2022-11-03 02:10:36,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638743877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:36,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:36,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:10:36,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159634095] [2022-11-03 02:10:36,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:36,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:10:36,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:10:36,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:10:36,361 INFO L87 Difference]: Start difference. First operand 421 states and 576 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:37,264 INFO L93 Difference]: Finished difference Result 1808 states and 2635 transitions. [2022-11-03 02:10:37,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:10:37,265 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:37,268 INFO L225 Difference]: With dead ends: 1808 [2022-11-03 02:10:37,268 INFO L226 Difference]: Without dead ends: 1519 [2022-11-03 02:10:37,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:10:37,270 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 3546 mSDsluCounter, 5169 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 5791 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:37,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3546 Valid, 5791 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2022-11-03 02:10:37,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 447. [2022-11-03 02:10:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.3766816143497758) internal successors, (614), 446 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 614 transitions. [2022-11-03 02:10:37,284 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 614 transitions. Word has length 266 [2022-11-03 02:10:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:37,284 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 614 transitions. [2022-11-03 02:10:37,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 614 transitions. [2022-11-03 02:10:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:37,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:37,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:37,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 02:10:37,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:37,496 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:37,496 INFO L85 PathProgramCache]: Analyzing trace with hash -128151745, now seen corresponding path program 1 times [2022-11-03 02:10:37,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:37,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529155925] [2022-11-03 02:10:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:37,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:37,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:37,499 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:37,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 02:10:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:38,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:10:38,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:39,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:39,085 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:39,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529155925] [2022-11-03 02:10:39,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529155925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:39,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:39,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:10:39,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234611630] [2022-11-03 02:10:39,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:39,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:10:39,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:39,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:10:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:10:39,088 INFO L87 Difference]: Start difference. First operand 447 states and 614 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:41,084 INFO L93 Difference]: Finished difference Result 2040 states and 2968 transitions. [2022-11-03 02:10:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:10:41,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:41,088 INFO L225 Difference]: With dead ends: 2040 [2022-11-03 02:10:41,089 INFO L226 Difference]: Without dead ends: 1725 [2022-11-03 02:10:41,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:10:41,091 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 3319 mSDsluCounter, 3716 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4235 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:41,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4235 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:10:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2022-11-03 02:10:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 507. [2022-11-03 02:10:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.3853754940711462) internal successors, (701), 506 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 701 transitions. [2022-11-03 02:10:41,107 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 701 transitions. Word has length 266 [2022-11-03 02:10:41,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:41,108 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 701 transitions. [2022-11-03 02:10:41,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:41,108 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 701 transitions. [2022-11-03 02:10:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:41,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:41,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:41,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-03 02:10:41,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:41,332 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:41,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:41,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1076203711, now seen corresponding path program 1 times [2022-11-03 02:10:41,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:41,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503130210] [2022-11-03 02:10:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:41,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:41,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:41,337 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:41,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:10:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:42,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:10:42,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:42,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:42,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:42,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503130210] [2022-11-03 02:10:42,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503130210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:42,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:42,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:10:42,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753994017] [2022-11-03 02:10:42,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:42,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:10:42,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:42,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:10:42,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:10:42,893 INFO L87 Difference]: Start difference. First operand 507 states and 701 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:44,797 INFO L93 Difference]: Finished difference Result 2102 states and 3056 transitions. [2022-11-03 02:10:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:10:44,798 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:44,799 INFO L225 Difference]: With dead ends: 2102 [2022-11-03 02:10:44,799 INFO L226 Difference]: Without dead ends: 1727 [2022-11-03 02:10:44,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:10:44,800 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 3319 mSDsluCounter, 3717 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4240 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:44,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4240 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:10:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-11-03 02:10:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 509. [2022-11-03 02:10:44,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.3838582677165354) internal successors, (703), 508 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 703 transitions. [2022-11-03 02:10:44,811 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 703 transitions. Word has length 266 [2022-11-03 02:10:44,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:44,811 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 703 transitions. [2022-11-03 02:10:44,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 703 transitions. [2022-11-03 02:10:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:44,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:44,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:44,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:45,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:45,014 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:45,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:45,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1510709309, now seen corresponding path program 1 times [2022-11-03 02:10:45,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:45,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197769136] [2022-11-03 02:10:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:45,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:45,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:45,017 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:45,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 02:10:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:45,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:10:45,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:46,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:46,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:46,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197769136] [2022-11-03 02:10:46,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197769136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:46,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:46,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:10:46,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312491560] [2022-11-03 02:10:46,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:46,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:10:46,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:46,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:10:46,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:10:46,567 INFO L87 Difference]: Start difference. First operand 509 states and 703 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:48,471 INFO L93 Difference]: Finished difference Result 2106 states and 3059 transitions. [2022-11-03 02:10:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:10:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:48,473 INFO L225 Difference]: With dead ends: 2106 [2022-11-03 02:10:48,473 INFO L226 Difference]: Without dead ends: 1729 [2022-11-03 02:10:48,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:10:48,475 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 3319 mSDsluCounter, 3718 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4245 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:48,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4245 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:10:48,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-11-03 02:10:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 511. [2022-11-03 02:10:48,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.3823529411764706) internal successors, (705), 510 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 705 transitions. [2022-11-03 02:10:48,491 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 705 transitions. Word has length 266 [2022-11-03 02:10:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:48,491 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 705 transitions. [2022-11-03 02:10:48,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:48,492 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 705 transitions. [2022-11-03 02:10:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:48,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:48,494 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:48,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:48,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:48,716 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:48,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:48,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2077661381, now seen corresponding path program 1 times [2022-11-03 02:10:48,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:48,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513931167] [2022-11-03 02:10:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:48,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:48,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:48,721 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:48,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 02:10:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:49,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:10:49,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:50,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:50,549 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:50,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513931167] [2022-11-03 02:10:50,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513931167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:50,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:50,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:10:50,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510241998] [2022-11-03 02:10:50,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:50,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:10:50,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:50,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:10:50,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:10:50,553 INFO L87 Difference]: Start difference. First operand 511 states and 705 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:52,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:52,453 INFO L93 Difference]: Finished difference Result 2110 states and 3062 transitions. [2022-11-03 02:10:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:10:52,453 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:52,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:52,455 INFO L225 Difference]: With dead ends: 2110 [2022-11-03 02:10:52,455 INFO L226 Difference]: Without dead ends: 1731 [2022-11-03 02:10:52,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:10:52,456 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 3319 mSDsluCounter, 3719 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4250 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:52,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4250 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:10:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-11-03 02:10:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 513. [2022-11-03 02:10:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.380859375) internal successors, (707), 512 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 707 transitions. [2022-11-03 02:10:52,466 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 707 transitions. Word has length 266 [2022-11-03 02:10:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:52,467 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 707 transitions. [2022-11-03 02:10:52,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 707 transitions. [2022-11-03 02:10:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:52,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:52,469 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:52,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-03 02:10:52,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:52,669 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:52,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:52,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1355472313, now seen corresponding path program 1 times [2022-11-03 02:10:52,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:52,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872532434] [2022-11-03 02:10:52,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:52,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:52,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:52,673 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:52,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 02:10:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:53,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:10:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:54,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:54,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:54,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872532434] [2022-11-03 02:10:54,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872532434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:54,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:54,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:10:54,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304549367] [2022-11-03 02:10:54,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:54,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:10:54,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:54,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:10:54,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:10:54,121 INFO L87 Difference]: Start difference. First operand 513 states and 707 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:56,061 INFO L93 Difference]: Finished difference Result 2114 states and 3065 transitions. [2022-11-03 02:10:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:10:56,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:56,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:56,063 INFO L225 Difference]: With dead ends: 2114 [2022-11-03 02:10:56,063 INFO L226 Difference]: Without dead ends: 1733 [2022-11-03 02:10:56,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:10:56,064 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 3319 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4255 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:56,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4255 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:10:56,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-11-03 02:10:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 515. [2022-11-03 02:10:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.3793774319066148) internal successors, (709), 514 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:56,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 709 transitions. [2022-11-03 02:10:56,075 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 709 transitions. Word has length 266 [2022-11-03 02:10:56,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:56,075 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 709 transitions. [2022-11-03 02:10:56,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:56,076 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 709 transitions. [2022-11-03 02:10:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:56,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:56,077 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:56,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-03 02:10:56,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:56,277 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:56,278 INFO L85 PathProgramCache]: Analyzing trace with hash -867425207, now seen corresponding path program 1 times [2022-11-03 02:10:56,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:56,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268511258] [2022-11-03 02:10:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:56,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:56,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:56,281 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:56,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 02:10:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:57,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:10:57,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:57,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:57,771 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:57,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268511258] [2022-11-03 02:10:57,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268511258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:57,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:57,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:10:57,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610252364] [2022-11-03 02:10:57,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:57,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:10:57,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:57,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:10:57,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:10:57,773 INFO L87 Difference]: Start difference. First operand 515 states and 709 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:59,709 INFO L93 Difference]: Finished difference Result 2118 states and 3068 transitions. [2022-11-03 02:10:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:10:59,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:10:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:59,711 INFO L225 Difference]: With dead ends: 2118 [2022-11-03 02:10:59,711 INFO L226 Difference]: Without dead ends: 1735 [2022-11-03 02:10:59,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:10:59,712 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 3319 mSDsluCounter, 3721 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3319 SdHoareTripleChecker+Valid, 4260 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:59,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3319 Valid, 4260 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:10:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2022-11-03 02:10:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 517. [2022-11-03 02:10:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.377906976744186) internal successors, (711), 516 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 711 transitions. [2022-11-03 02:10:59,723 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 711 transitions. Word has length 266 [2022-11-03 02:10:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:59,723 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 711 transitions. [2022-11-03 02:10:59,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 711 transitions. [2022-11-03 02:10:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:10:59,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:59,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:59,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:59,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:59,926 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:59,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2145369803, now seen corresponding path program 1 times [2022-11-03 02:10:59,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:59,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636806514] [2022-11-03 02:10:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:59,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:59,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:59,934 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:59,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 02:11:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:00,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:01,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:01,429 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:01,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636806514] [2022-11-03 02:11:01,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636806514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:01,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:01,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:11:01,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213749781] [2022-11-03 02:11:01,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:01,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:11:01,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:01,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:11:01,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:11:01,431 INFO L87 Difference]: Start difference. First operand 517 states and 711 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:03,443 INFO L93 Difference]: Finished difference Result 2124 states and 3074 transitions. [2022-11-03 02:11:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:11:03,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:03,445 INFO L225 Difference]: With dead ends: 2124 [2022-11-03 02:11:03,445 INFO L226 Difference]: Without dead ends: 1739 [2022-11-03 02:11:03,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:11:03,446 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 3323 mSDsluCounter, 3726 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4275 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:03,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4275 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:11:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-11-03 02:11:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 521. [2022-11-03 02:11:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.376923076923077) internal successors, (716), 520 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 716 transitions. [2022-11-03 02:11:03,458 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 716 transitions. Word has length 266 [2022-11-03 02:11:03,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:03,458 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 716 transitions. [2022-11-03 02:11:03,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:03,459 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 716 transitions. [2022-11-03 02:11:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:03,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:03,460 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:03,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:03,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:03,680 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:03,681 INFO L85 PathProgramCache]: Analyzing trace with hash -220665267, now seen corresponding path program 1 times [2022-11-03 02:11:03,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:03,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072336330] [2022-11-03 02:11:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:03,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:03,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:03,685 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:03,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 02:11:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:04,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:04,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:05,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:05,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:05,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072336330] [2022-11-03 02:11:05,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072336330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:05,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:05,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:11:05,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071879003] [2022-11-03 02:11:05,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:05,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:11:05,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:05,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:11:05,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:11:05,293 INFO L87 Difference]: Start difference. First operand 521 states and 716 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:07,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:07,202 INFO L93 Difference]: Finished difference Result 2130 states and 3080 transitions. [2022-11-03 02:11:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:11:07,203 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:07,204 INFO L225 Difference]: With dead ends: 2130 [2022-11-03 02:11:07,204 INFO L226 Difference]: Without dead ends: 1741 [2022-11-03 02:11:07,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:11:07,206 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 3323 mSDsluCounter, 3727 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4280 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:07,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4280 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:11:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-11-03 02:11:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 523. [2022-11-03 02:11:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.3754789272030652) internal successors, (718), 522 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 718 transitions. [2022-11-03 02:11:07,218 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 718 transitions. Word has length 266 [2022-11-03 02:11:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:07,218 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 718 transitions. [2022-11-03 02:11:07,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 718 transitions. [2022-11-03 02:11:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:07,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:07,219 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:07,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-03 02:11:07,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:07,420 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:07,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1506479695, now seen corresponding path program 1 times [2022-11-03 02:11:07,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:07,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675158771] [2022-11-03 02:11:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:07,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:07,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:07,424 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:07,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 02:11:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:08,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:08,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:08,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:08,928 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:08,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675158771] [2022-11-03 02:11:08,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675158771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:08,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:08,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:11:08,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983560394] [2022-11-03 02:11:08,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:08,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:11:08,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:11:08,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:11:08,931 INFO L87 Difference]: Start difference. First operand 523 states and 718 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:10,811 INFO L93 Difference]: Finished difference Result 2134 states and 3083 transitions. [2022-11-03 02:11:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:11:10,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:10,814 INFO L225 Difference]: With dead ends: 2134 [2022-11-03 02:11:10,814 INFO L226 Difference]: Without dead ends: 1743 [2022-11-03 02:11:10,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:11:10,815 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 3323 mSDsluCounter, 3728 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4285 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:10,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4285 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:11:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-11-03 02:11:10,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 525. [2022-11-03 02:11:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.3740458015267176) internal successors, (720), 524 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 720 transitions. [2022-11-03 02:11:10,825 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 720 transitions. Word has length 266 [2022-11-03 02:11:10,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:10,825 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 720 transitions. [2022-11-03 02:11:10,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 720 transitions. [2022-11-03 02:11:10,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:10,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:10,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:10,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-03 02:11:11,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:11,028 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash -140883247, now seen corresponding path program 1 times [2022-11-03 02:11:11,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:11,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838734086] [2022-11-03 02:11:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:11,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:11,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:11,031 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:11,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 02:11:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:11,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:11,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:12,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:12,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:12,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838734086] [2022-11-03 02:11:12,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838734086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:12,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:12,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:11:12,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966488453] [2022-11-03 02:11:12,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:12,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:11:12,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:12,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:11:12,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:11:12,531 INFO L87 Difference]: Start difference. First operand 525 states and 720 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:14,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:14,416 INFO L93 Difference]: Finished difference Result 2138 states and 3086 transitions. [2022-11-03 02:11:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:11:14,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:14,418 INFO L225 Difference]: With dead ends: 2138 [2022-11-03 02:11:14,418 INFO L226 Difference]: Without dead ends: 1745 [2022-11-03 02:11:14,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:11:14,422 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 3323 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4290 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:14,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4290 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:11:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2022-11-03 02:11:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 527. [2022-11-03 02:11:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.3726235741444868) internal successors, (722), 526 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 722 transitions. [2022-11-03 02:11:14,435 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 722 transitions. Word has length 266 [2022-11-03 02:11:14,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:14,436 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 722 transitions. [2022-11-03 02:11:14,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 722 transitions. [2022-11-03 02:11:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:14,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:14,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:14,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:14,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:14,651 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:14,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:14,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1179467821, now seen corresponding path program 1 times [2022-11-03 02:11:14,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:14,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852861683] [2022-11-03 02:11:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:14,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:14,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:14,654 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:14,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 02:11:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:15,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:15,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:16,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:16,096 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:16,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852861683] [2022-11-03 02:11:16,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852861683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:16,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:16,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:11:16,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522834096] [2022-11-03 02:11:16,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:16,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:11:16,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:16,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:11:16,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:11:16,098 INFO L87 Difference]: Start difference. First operand 527 states and 722 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:17,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:17,895 INFO L93 Difference]: Finished difference Result 2142 states and 3089 transitions. [2022-11-03 02:11:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:11:17,895 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:17,897 INFO L225 Difference]: With dead ends: 2142 [2022-11-03 02:11:17,897 INFO L226 Difference]: Without dead ends: 1747 [2022-11-03 02:11:17,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:11:17,899 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 3323 mSDsluCounter, 3730 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4295 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:17,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4295 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:11:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-11-03 02:11:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 529. [2022-11-03 02:11:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.371212121212121) internal successors, (724), 528 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:17,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 724 transitions. [2022-11-03 02:11:17,915 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 724 transitions. Word has length 266 [2022-11-03 02:11:17,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:17,916 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 724 transitions. [2022-11-03 02:11:17,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:17,916 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 724 transitions. [2022-11-03 02:11:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:17,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:17,918 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:17,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-03 02:11:18,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:18,133 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:18,133 INFO L85 PathProgramCache]: Analyzing trace with hash 973638997, now seen corresponding path program 1 times [2022-11-03 02:11:18,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:18,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666426887] [2022-11-03 02:11:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:18,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:18,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:18,136 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:18,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 02:11:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:18,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:18,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:19,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:19,609 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:19,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666426887] [2022-11-03 02:11:19,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666426887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:19,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:19,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:11:19,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687176307] [2022-11-03 02:11:19,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:19,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:11:19,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:19,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:11:19,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:11:19,611 INFO L87 Difference]: Start difference. First operand 529 states and 724 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:21,563 INFO L93 Difference]: Finished difference Result 2146 states and 3092 transitions. [2022-11-03 02:11:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:11:21,563 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:21,564 INFO L225 Difference]: With dead ends: 2146 [2022-11-03 02:11:21,564 INFO L226 Difference]: Without dead ends: 1749 [2022-11-03 02:11:21,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:11:21,565 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 3323 mSDsluCounter, 3731 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4300 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:21,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4300 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:11:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2022-11-03 02:11:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 531. [2022-11-03 02:11:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.369811320754717) internal successors, (726), 530 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 726 transitions. [2022-11-03 02:11:21,579 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 726 transitions. Word has length 266 [2022-11-03 02:11:21,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:21,579 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 726 transitions. [2022-11-03 02:11:21,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:21,579 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 726 transitions. [2022-11-03 02:11:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:21,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:21,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:21,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:21,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:21,784 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:21,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:21,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1092080471, now seen corresponding path program 1 times [2022-11-03 02:11:21,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:21,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463324611] [2022-11-03 02:11:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:21,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:21,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:21,789 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:21,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 02:11:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:22,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:22,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:23,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:23,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:23,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463324611] [2022-11-03 02:11:23,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463324611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:23,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:23,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:11:23,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499375867] [2022-11-03 02:11:23,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:23,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:11:23,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:23,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:11:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:11:23,317 INFO L87 Difference]: Start difference. First operand 531 states and 726 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:25,179 INFO L93 Difference]: Finished difference Result 2150 states and 3095 transitions. [2022-11-03 02:11:25,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:11:25,179 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:25,181 INFO L225 Difference]: With dead ends: 2150 [2022-11-03 02:11:25,181 INFO L226 Difference]: Without dead ends: 1751 [2022-11-03 02:11:25,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:11:25,183 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 3323 mSDsluCounter, 3732 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4305 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:25,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4305 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:11:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-11-03 02:11:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 533. [2022-11-03 02:11:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.368421052631579) internal successors, (728), 532 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 728 transitions. [2022-11-03 02:11:25,198 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 728 transitions. Word has length 266 [2022-11-03 02:11:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:25,198 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 728 transitions. [2022-11-03 02:11:25,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 728 transitions. [2022-11-03 02:11:25,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:25,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:25,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:25,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-03 02:11:25,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:25,401 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:25,402 INFO L85 PathProgramCache]: Analyzing trace with hash -941313575, now seen corresponding path program 1 times [2022-11-03 02:11:25,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:25,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61022766] [2022-11-03 02:11:25,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:25,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:25,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:25,405 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:25,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 02:11:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:26,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:26,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:26,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:26,935 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:26,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61022766] [2022-11-03 02:11:26,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61022766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:26,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:26,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:11:26,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973969994] [2022-11-03 02:11:26,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:26,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:11:26,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:26,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:11:26,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:11:26,937 INFO L87 Difference]: Start difference. First operand 533 states and 728 transitions. Second operand has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:28,840 INFO L93 Difference]: Finished difference Result 2154 states and 3098 transitions. [2022-11-03 02:11:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:11:28,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:28,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:28,841 INFO L225 Difference]: With dead ends: 2154 [2022-11-03 02:11:28,841 INFO L226 Difference]: Without dead ends: 1753 [2022-11-03 02:11:28,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:11:28,842 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 3323 mSDsluCounter, 3733 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3323 SdHoareTripleChecker+Valid, 4310 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:28,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3323 Valid, 4310 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:11:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2022-11-03 02:11:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 535. [2022-11-03 02:11:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.3670411985018727) internal successors, (730), 534 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 730 transitions. [2022-11-03 02:11:28,853 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 730 transitions. Word has length 266 [2022-11-03 02:11:28,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:28,853 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 730 transitions. [2022-11-03 02:11:28,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 730 transitions. [2022-11-03 02:11:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:28,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:28,855 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:28,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:29,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:29,056 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2046511323, now seen corresponding path program 1 times [2022-11-03 02:11:29,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:29,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518527467] [2022-11-03 02:11:29,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:29,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:29,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:29,059 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:29,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 02:11:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:29,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:30,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:30,553 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:30,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518527467] [2022-11-03 02:11:30,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518527467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:30,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:30,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:11:30,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765609493] [2022-11-03 02:11:30,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:30,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:11:30,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:11:30,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:11:30,554 INFO L87 Difference]: Start difference. First operand 535 states and 730 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:32,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:32,852 INFO L93 Difference]: Finished difference Result 2294 states and 3304 transitions. [2022-11-03 02:11:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:11:32,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:32,854 INFO L225 Difference]: With dead ends: 2294 [2022-11-03 02:11:32,854 INFO L226 Difference]: Without dead ends: 1891 [2022-11-03 02:11:32,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:11:32,855 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 3740 mSDsluCounter, 5014 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3740 SdHoareTripleChecker+Valid, 5601 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:32,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3740 Valid, 5601 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:11:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-11-03 02:11:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 539. [2022-11-03 02:11:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.3661710037174721) internal successors, (735), 538 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 735 transitions. [2022-11-03 02:11:32,867 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 735 transitions. Word has length 266 [2022-11-03 02:11:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:32,867 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 735 transitions. [2022-11-03 02:11:32,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 735 transitions. [2022-11-03 02:11:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:32,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:32,869 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:32,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:33,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:33,070 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash -647384867, now seen corresponding path program 1 times [2022-11-03 02:11:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:33,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405725457] [2022-11-03 02:11:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:33,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:33,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:33,073 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:33,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 02:11:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:33,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:33,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:34,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:34,624 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:34,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405725457] [2022-11-03 02:11:34,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405725457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:34,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:34,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:11:34,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183496389] [2022-11-03 02:11:34,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:34,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:11:34,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:34,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:11:34,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:11:34,626 INFO L87 Difference]: Start difference. First operand 539 states and 735 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:36,911 INFO L93 Difference]: Finished difference Result 2306 states and 3318 transitions. [2022-11-03 02:11:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:11:36,911 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:36,913 INFO L225 Difference]: With dead ends: 2306 [2022-11-03 02:11:36,913 INFO L226 Difference]: Without dead ends: 1899 [2022-11-03 02:11:36,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:11:36,914 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 3743 mSDsluCounter, 5015 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 5606 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:36,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 5606 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:11:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-11-03 02:11:36,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 541. [2022-11-03 02:11:36,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.364814814814815) internal successors, (737), 540 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 737 transitions. [2022-11-03 02:11:36,928 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 737 transitions. Word has length 266 [2022-11-03 02:11:36,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:36,928 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 737 transitions. [2022-11-03 02:11:36,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:36,929 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 737 transitions. [2022-11-03 02:11:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:36,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:36,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:36,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-03 02:11:37,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:37,132 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:37,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:37,133 INFO L85 PathProgramCache]: Analyzing trace with hash 704000351, now seen corresponding path program 1 times [2022-11-03 02:11:37,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:37,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858630803] [2022-11-03 02:11:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:37,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:37,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:37,136 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:37,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 02:11:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:38,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:38,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:38,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:38,665 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858630803] [2022-11-03 02:11:38,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858630803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:38,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:38,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:11:38,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849520930] [2022-11-03 02:11:38,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:38,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:11:38,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:38,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:11:38,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:11:38,667 INFO L87 Difference]: Start difference. First operand 541 states and 737 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:40,977 INFO L93 Difference]: Finished difference Result 2316 states and 3329 transitions. [2022-11-03 02:11:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:11:40,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:40,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:40,979 INFO L225 Difference]: With dead ends: 2316 [2022-11-03 02:11:40,979 INFO L226 Difference]: Without dead ends: 1907 [2022-11-03 02:11:40,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:11:40,980 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 3746 mSDsluCounter, 5016 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3746 SdHoareTripleChecker+Valid, 5611 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:40,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3746 Valid, 5611 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:11:40,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2022-11-03 02:11:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 543. [2022-11-03 02:11:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 1.363468634686347) internal successors, (739), 542 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 739 transitions. [2022-11-03 02:11:41,006 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 739 transitions. Word has length 266 [2022-11-03 02:11:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:41,006 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 739 transitions. [2022-11-03 02:11:41,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 739 transitions. [2022-11-03 02:11:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:41,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:41,008 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:41,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 02:11:41,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:41,233 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:41,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:41,233 INFO L85 PathProgramCache]: Analyzing trace with hash -179508639, now seen corresponding path program 1 times [2022-11-03 02:11:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:41,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615080889] [2022-11-03 02:11:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:41,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:41,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:41,237 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:41,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 02:11:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:42,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:42,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:42,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:42,809 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:42,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615080889] [2022-11-03 02:11:42,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615080889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:42,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:42,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:11:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358003592] [2022-11-03 02:11:42,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:42,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:11:42,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:11:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:11:42,812 INFO L87 Difference]: Start difference. First operand 543 states and 739 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:45,096 INFO L93 Difference]: Finished difference Result 2326 states and 3340 transitions. [2022-11-03 02:11:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:11:45,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:45,098 INFO L225 Difference]: With dead ends: 2326 [2022-11-03 02:11:45,098 INFO L226 Difference]: Without dead ends: 1915 [2022-11-03 02:11:45,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:11:45,099 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 3749 mSDsluCounter, 5017 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3749 SdHoareTripleChecker+Valid, 5616 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:45,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3749 Valid, 5616 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:11:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2022-11-03 02:11:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 545. [2022-11-03 02:11:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.3621323529411764) internal successors, (741), 544 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 741 transitions. [2022-11-03 02:11:45,113 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 741 transitions. Word has length 266 [2022-11-03 02:11:45,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:45,114 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 741 transitions. [2022-11-03 02:11:45,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:45,114 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 741 transitions. [2022-11-03 02:11:45,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:45,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:45,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:45,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-03 02:11:45,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:45,316 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:45,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:45,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2120090653, now seen corresponding path program 1 times [2022-11-03 02:11:45,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:45,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372595537] [2022-11-03 02:11:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:45,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:45,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:45,320 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:45,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 02:11:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:46,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:46,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:46,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:46,863 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:46,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372595537] [2022-11-03 02:11:46,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372595537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:46,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:46,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:11:46,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182622820] [2022-11-03 02:11:46,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:46,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:11:46,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:11:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:11:46,865 INFO L87 Difference]: Start difference. First operand 545 states and 741 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:49,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:49,180 INFO L93 Difference]: Finished difference Result 2336 states and 3351 transitions. [2022-11-03 02:11:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:11:49,180 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:49,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:49,182 INFO L225 Difference]: With dead ends: 2336 [2022-11-03 02:11:49,182 INFO L226 Difference]: Without dead ends: 1923 [2022-11-03 02:11:49,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:11:49,183 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 3752 mSDsluCounter, 5018 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3752 SdHoareTripleChecker+Valid, 5621 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:49,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3752 Valid, 5621 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:11:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2022-11-03 02:11:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 547. [2022-11-03 02:11:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.3608058608058609) internal successors, (743), 546 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 743 transitions. [2022-11-03 02:11:49,199 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 743 transitions. Word has length 266 [2022-11-03 02:11:49,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:49,199 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 743 transitions. [2022-11-03 02:11:49,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 743 transitions. [2022-11-03 02:11:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:49,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:49,201 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:49,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-03 02:11:49,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:49,401 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:49,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1404143077, now seen corresponding path program 1 times [2022-11-03 02:11:49,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:49,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244190326] [2022-11-03 02:11:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:49,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:49,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:49,404 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:49,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 02:11:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:50,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:50,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:50,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:50,975 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:50,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244190326] [2022-11-03 02:11:50,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244190326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:50,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:50,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:11:50,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689663791] [2022-11-03 02:11:50,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:50,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:11:50,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:50,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:11:50,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:11:50,977 INFO L87 Difference]: Start difference. First operand 547 states and 743 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:53,290 INFO L93 Difference]: Finished difference Result 2346 states and 3362 transitions. [2022-11-03 02:11:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:11:53,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:53,293 INFO L225 Difference]: With dead ends: 2346 [2022-11-03 02:11:53,293 INFO L226 Difference]: Without dead ends: 1931 [2022-11-03 02:11:53,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:11:53,295 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 3755 mSDsluCounter, 5019 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 5626 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:53,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3755 Valid, 5626 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:11:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-11-03 02:11:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 549. [2022-11-03 02:11:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.3594890510948905) internal successors, (745), 548 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 745 transitions. [2022-11-03 02:11:53,312 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 745 transitions. Word has length 266 [2022-11-03 02:11:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:53,312 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 745 transitions. [2022-11-03 02:11:53,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 745 transitions. [2022-11-03 02:11:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:53,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:53,314 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:53,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:53,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:53,515 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:53,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:53,515 INFO L85 PathProgramCache]: Analyzing trace with hash 817866855, now seen corresponding path program 1 times [2022-11-03 02:11:53,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:53,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977183142] [2022-11-03 02:11:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:53,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:53,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:53,518 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:53,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 02:11:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:54,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:54,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:55,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:55,052 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:55,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977183142] [2022-11-03 02:11:55,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977183142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:55,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:55,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:11:55,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080105656] [2022-11-03 02:11:55,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:55,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:11:55,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:55,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:11:55,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:11:55,053 INFO L87 Difference]: Start difference. First operand 549 states and 745 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:57,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:57,348 INFO L93 Difference]: Finished difference Result 2364 states and 3385 transitions. [2022-11-03 02:11:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:11:57,349 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:11:57,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:57,350 INFO L225 Difference]: With dead ends: 2364 [2022-11-03 02:11:57,350 INFO L226 Difference]: Without dead ends: 1947 [2022-11-03 02:11:57,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:11:57,351 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 3765 mSDsluCounter, 5024 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3765 SdHoareTripleChecker+Valid, 5641 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:57,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3765 Valid, 5641 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:11:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-11-03 02:11:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 553. [2022-11-03 02:11:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.358695652173913) internal successors, (750), 552 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 750 transitions. [2022-11-03 02:11:57,369 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 750 transitions. Word has length 266 [2022-11-03 02:11:57,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:57,369 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 750 transitions. [2022-11-03 02:11:57,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:57,369 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 750 transitions. [2022-11-03 02:11:57,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:11:57,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:57,371 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:57,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-03 02:11:57,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:57,573 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:57,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2142723049, now seen corresponding path program 1 times [2022-11-03 02:11:57,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:57,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998582720] [2022-11-03 02:11:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:57,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:57,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:57,576 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:57,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 02:11:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:11:58,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:59,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:59,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:59,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998582720] [2022-11-03 02:11:59,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998582720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:59,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:59,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:11:59,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108170371] [2022-11-03 02:11:59,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:59,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:11:59,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:11:59,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:11:59,116 INFO L87 Difference]: Start difference. First operand 553 states and 750 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:01,570 INFO L93 Difference]: Finished difference Result 2376 states and 3399 transitions. [2022-11-03 02:12:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:01,570 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:01,572 INFO L225 Difference]: With dead ends: 2376 [2022-11-03 02:12:01,574 INFO L226 Difference]: Without dead ends: 1955 [2022-11-03 02:12:01,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:01,575 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 3768 mSDsluCounter, 5025 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3768 SdHoareTripleChecker+Valid, 5646 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:01,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3768 Valid, 5646 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:12:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-11-03 02:12:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 555. [2022-11-03 02:12:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.3574007220216606) internal successors, (752), 554 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 752 transitions. [2022-11-03 02:12:01,595 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 752 transitions. Word has length 266 [2022-11-03 02:12:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:01,595 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 752 transitions. [2022-11-03 02:12:01,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:01,596 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 752 transitions. [2022-11-03 02:12:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:01,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:01,598 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:01,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 02:12:01,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:01,820 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:01,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:01,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1084884971, now seen corresponding path program 1 times [2022-11-03 02:12:01,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:01,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436608470] [2022-11-03 02:12:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:01,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:01,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:01,824 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:01,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-03 02:12:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:02,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:02,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:03,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:03,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:03,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436608470] [2022-11-03 02:12:03,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436608470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:03,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:03,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:03,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098954471] [2022-11-03 02:12:03,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:03,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:03,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:03,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:03,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:03,380 INFO L87 Difference]: Start difference. First operand 555 states and 752 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:05,669 INFO L93 Difference]: Finished difference Result 2386 states and 3410 transitions. [2022-11-03 02:12:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:05,669 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:05,671 INFO L225 Difference]: With dead ends: 2386 [2022-11-03 02:12:05,671 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 02:12:05,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:05,672 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 3771 mSDsluCounter, 5026 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 5651 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:05,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3771 Valid, 5651 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:12:05,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 02:12:05,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 557. [2022-11-03 02:12:05,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.356115107913669) internal successors, (754), 556 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:05,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 754 transitions. [2022-11-03 02:12:05,684 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 754 transitions. Word has length 266 [2022-11-03 02:12:05,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:05,684 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 754 transitions. [2022-11-03 02:12:05,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 754 transitions. [2022-11-03 02:12:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:05,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:05,686 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:05,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:05,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:05,887 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:05,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:05,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1325124717, now seen corresponding path program 1 times [2022-11-03 02:12:05,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:05,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417398324] [2022-11-03 02:12:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:05,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:05,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:05,890 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:05,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 02:12:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:06,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:06,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:07,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:07,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417398324] [2022-11-03 02:12:07,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417398324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:07,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:07,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:07,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737466732] [2022-11-03 02:12:07,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:07,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:07,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:07,475 INFO L87 Difference]: Start difference. First operand 557 states and 754 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:10,002 INFO L93 Difference]: Finished difference Result 2396 states and 3421 transitions. [2022-11-03 02:12:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:10,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:10,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:10,004 INFO L225 Difference]: With dead ends: 2396 [2022-11-03 02:12:10,005 INFO L226 Difference]: Without dead ends: 1971 [2022-11-03 02:12:10,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:10,006 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 3774 mSDsluCounter, 5027 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3774 SdHoareTripleChecker+Valid, 5656 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:10,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3774 Valid, 5656 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:12:10,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-11-03 02:12:10,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 559. [2022-11-03 02:12:10,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.3548387096774193) internal successors, (756), 558 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 756 transitions. [2022-11-03 02:12:10,026 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 756 transitions. Word has length 266 [2022-11-03 02:12:10,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:10,026 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 756 transitions. [2022-11-03 02:12:10,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 756 transitions. [2022-11-03 02:12:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:10,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:10,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:10,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:10,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:10,244 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:10,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:10,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1352190319, now seen corresponding path program 1 times [2022-11-03 02:12:10,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:10,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152152357] [2022-11-03 02:12:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:10,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:10,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:10,249 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:10,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 02:12:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:11,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:11,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:12,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:12,048 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:12,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152152357] [2022-11-03 02:12:12,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152152357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:12,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:12,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:12,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289335547] [2022-11-03 02:12:12,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:12,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:12,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:12,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:12,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:12,050 INFO L87 Difference]: Start difference. First operand 559 states and 756 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:14,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:14,776 INFO L93 Difference]: Finished difference Result 2406 states and 3432 transitions. [2022-11-03 02:12:14,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:14,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:14,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:14,778 INFO L225 Difference]: With dead ends: 2406 [2022-11-03 02:12:14,778 INFO L226 Difference]: Without dead ends: 1979 [2022-11-03 02:12:14,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:14,779 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 3777 mSDsluCounter, 5028 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3777 SdHoareTripleChecker+Valid, 5661 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:14,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3777 Valid, 5661 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:12:14,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-03 02:12:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 561. [2022-11-03 02:12:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.3535714285714286) internal successors, (758), 560 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 758 transitions. [2022-11-03 02:12:14,799 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 758 transitions. Word has length 266 [2022-11-03 02:12:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:14,800 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 758 transitions. [2022-11-03 02:12:14,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 758 transitions. [2022-11-03 02:12:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:14,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:14,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:14,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:15,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:15,020 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:15,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1208672527, now seen corresponding path program 1 times [2022-11-03 02:12:15,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:15,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310147290] [2022-11-03 02:12:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:15,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:15,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:15,024 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:15,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 02:12:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:15,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:16,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:16,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:16,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310147290] [2022-11-03 02:12:16,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310147290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:16,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:16,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922282944] [2022-11-03 02:12:16,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:16,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:16,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:16,784 INFO L87 Difference]: Start difference. First operand 561 states and 758 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:19,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:19,481 INFO L93 Difference]: Finished difference Result 2416 states and 3443 transitions. [2022-11-03 02:12:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:19,483 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:19,485 INFO L225 Difference]: With dead ends: 2416 [2022-11-03 02:12:19,485 INFO L226 Difference]: Without dead ends: 1987 [2022-11-03 02:12:19,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:19,486 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 3780 mSDsluCounter, 5029 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3780 SdHoareTripleChecker+Valid, 5666 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:19,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3780 Valid, 5666 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:12:19,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-11-03 02:12:19,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 563. [2022-11-03 02:12:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.3523131672597866) internal successors, (760), 562 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 760 transitions. [2022-11-03 02:12:19,500 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 760 transitions. Word has length 266 [2022-11-03 02:12:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:19,501 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 760 transitions. [2022-11-03 02:12:19,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 760 transitions. [2022-11-03 02:12:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:19,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:19,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:19,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:19,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:19,703 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:19,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1175252211, now seen corresponding path program 1 times [2022-11-03 02:12:19,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:19,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015781156] [2022-11-03 02:12:19,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:19,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:19,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:19,707 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:19,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 02:12:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:20,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:20,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:21,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:21,523 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:21,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015781156] [2022-11-03 02:12:21,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015781156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:21,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:21,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:21,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677459364] [2022-11-03 02:12:21,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:21,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:21,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:21,526 INFO L87 Difference]: Start difference. First operand 563 states and 760 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:24,242 INFO L93 Difference]: Finished difference Result 2426 states and 3454 transitions. [2022-11-03 02:12:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:24,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:24,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:24,244 INFO L225 Difference]: With dead ends: 2426 [2022-11-03 02:12:24,244 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 02:12:24,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:24,246 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 3783 mSDsluCounter, 5030 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3783 SdHoareTripleChecker+Valid, 5671 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:24,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3783 Valid, 5671 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:12:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 02:12:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 565. [2022-11-03 02:12:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.351063829787234) internal successors, (762), 564 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 762 transitions. [2022-11-03 02:12:24,260 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 762 transitions. Word has length 266 [2022-11-03 02:12:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:24,260 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 762 transitions. [2022-11-03 02:12:24,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 762 transitions. [2022-11-03 02:12:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:24,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:24,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:24,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 02:12:24,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:24,462 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:24,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:24,462 INFO L85 PathProgramCache]: Analyzing trace with hash 207901557, now seen corresponding path program 1 times [2022-11-03 02:12:24,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:24,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314407162] [2022-11-03 02:12:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:24,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:24,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:24,466 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:24,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 02:12:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:25,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:25,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:26,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:26,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314407162] [2022-11-03 02:12:26,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314407162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:26,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:26,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66525481] [2022-11-03 02:12:26,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:26,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:26,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:26,263 INFO L87 Difference]: Start difference. First operand 565 states and 762 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:28,940 INFO L93 Difference]: Finished difference Result 2436 states and 3465 transitions. [2022-11-03 02:12:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:28,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:28,943 INFO L225 Difference]: With dead ends: 2436 [2022-11-03 02:12:28,943 INFO L226 Difference]: Without dead ends: 2003 [2022-11-03 02:12:28,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:28,944 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 3786 mSDsluCounter, 5031 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3786 SdHoareTripleChecker+Valid, 5676 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:28,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3786 Valid, 5676 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:12:28,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-11-03 02:12:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 567. [2022-11-03 02:12:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 1.3498233215547704) internal successors, (764), 566 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 764 transitions. [2022-11-03 02:12:28,958 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 764 transitions. Word has length 266 [2022-11-03 02:12:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:28,958 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 764 transitions. [2022-11-03 02:12:28,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:28,958 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 764 transitions. [2022-11-03 02:12:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:28,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:28,959 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:28,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-03 02:12:29,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:29,160 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash -284724617, now seen corresponding path program 1 times [2022-11-03 02:12:29,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:29,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846252799] [2022-11-03 02:12:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:29,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:29,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:29,165 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:29,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 02:12:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:30,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:30,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:30,972 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:30,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846252799] [2022-11-03 02:12:30,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846252799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:30,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:30,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:30,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25808503] [2022-11-03 02:12:30,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:30,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:30,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:30,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:30,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:30,974 INFO L87 Difference]: Start difference. First operand 567 states and 764 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:33,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:33,603 INFO L93 Difference]: Finished difference Result 2358 states and 3358 transitions. [2022-11-03 02:12:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:33,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:33,605 INFO L225 Difference]: With dead ends: 2358 [2022-11-03 02:12:33,605 INFO L226 Difference]: Without dead ends: 1923 [2022-11-03 02:12:33,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:33,606 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 3734 mSDsluCounter, 4972 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3734 SdHoareTripleChecker+Valid, 5627 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:33,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3734 Valid, 5627 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:12:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2022-11-03 02:12:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 571. [2022-11-03 02:12:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.3491228070175438) internal successors, (769), 570 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:33,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 769 transitions. [2022-11-03 02:12:33,626 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 769 transitions. Word has length 266 [2022-11-03 02:12:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:33,627 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 769 transitions. [2022-11-03 02:12:33,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 769 transitions. [2022-11-03 02:12:33,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:33,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:33,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:33,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:33,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:33,844 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:33,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1970904455, now seen corresponding path program 1 times [2022-11-03 02:12:33,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:33,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748647895] [2022-11-03 02:12:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:33,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:33,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:33,849 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:33,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 02:12:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:34,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:34,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:35,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:35,661 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:35,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748647895] [2022-11-03 02:12:35,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748647895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:35,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:35,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:35,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617130661] [2022-11-03 02:12:35,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:35,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:35,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:35,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:35,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:35,663 INFO L87 Difference]: Start difference. First operand 571 states and 769 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:38,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:38,266 INFO L93 Difference]: Finished difference Result 2370 states and 3372 transitions. [2022-11-03 02:12:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:38,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:38,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:38,268 INFO L225 Difference]: With dead ends: 2370 [2022-11-03 02:12:38,269 INFO L226 Difference]: Without dead ends: 1931 [2022-11-03 02:12:38,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:38,270 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 3737 mSDsluCounter, 4973 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3737 SdHoareTripleChecker+Valid, 5632 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:38,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3737 Valid, 5632 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:12:38,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-11-03 02:12:38,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 573. [2022-11-03 02:12:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 1.347902097902098) internal successors, (771), 572 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 771 transitions. [2022-11-03 02:12:38,283 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 771 transitions. Word has length 266 [2022-11-03 02:12:38,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:38,283 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 771 transitions. [2022-11-03 02:12:38,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 771 transitions. [2022-11-03 02:12:38,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:38,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:38,285 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:38,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-03 02:12:38,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:38,485 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1906666235, now seen corresponding path program 1 times [2022-11-03 02:12:38,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:38,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453511998] [2022-11-03 02:12:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:38,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:38,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:38,490 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:38,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 02:12:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:39,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:39,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:40,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:40,269 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:40,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453511998] [2022-11-03 02:12:40,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453511998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:40,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:40,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:40,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098874984] [2022-11-03 02:12:40,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:40,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:40,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:40,271 INFO L87 Difference]: Start difference. First operand 573 states and 771 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:42,960 INFO L93 Difference]: Finished difference Result 2380 states and 3383 transitions. [2022-11-03 02:12:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:42,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:42,963 INFO L225 Difference]: With dead ends: 2380 [2022-11-03 02:12:42,963 INFO L226 Difference]: Without dead ends: 1939 [2022-11-03 02:12:42,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:42,965 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 3740 mSDsluCounter, 4974 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3740 SdHoareTripleChecker+Valid, 5637 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:42,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3740 Valid, 5637 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:12:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2022-11-03 02:12:42,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 575. [2022-11-03 02:12:42,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3466898954703832) internal successors, (773), 574 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 773 transitions. [2022-11-03 02:12:42,986 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 773 transitions. Word has length 266 [2022-11-03 02:12:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:42,987 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 773 transitions. [2022-11-03 02:12:42,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:42,987 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 773 transitions. [2022-11-03 02:12:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:42,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:42,989 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:43,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-03 02:12:43,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:43,190 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:43,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash -426726403, now seen corresponding path program 1 times [2022-11-03 02:12:43,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:43,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122111926] [2022-11-03 02:12:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:43,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:43,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:43,193 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:43,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 02:12:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:44,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:44,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:44,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:44,993 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:44,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122111926] [2022-11-03 02:12:44,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122111926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:44,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:44,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:44,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009719356] [2022-11-03 02:12:44,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:44,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:44,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:44,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:44,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:44,995 INFO L87 Difference]: Start difference. First operand 575 states and 773 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:47,433 INFO L93 Difference]: Finished difference Result 2390 states and 3394 transitions. [2022-11-03 02:12:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:47,434 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:47,436 INFO L225 Difference]: With dead ends: 2390 [2022-11-03 02:12:47,436 INFO L226 Difference]: Without dead ends: 1947 [2022-11-03 02:12:47,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:47,437 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 3743 mSDsluCounter, 4975 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 5642 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:47,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 5642 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:12:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-11-03 02:12:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 577. [2022-11-03 02:12:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.3454861111111112) internal successors, (775), 576 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 775 transitions. [2022-11-03 02:12:47,449 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 775 transitions. Word has length 266 [2022-11-03 02:12:47,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:47,449 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 775 transitions. [2022-11-03 02:12:47,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 775 transitions. [2022-11-03 02:12:47,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:47,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:47,451 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:47,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:47,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:47,651 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash 133973375, now seen corresponding path program 1 times [2022-11-03 02:12:47,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:47,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905981622] [2022-11-03 02:12:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:47,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:47,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:47,655 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:47,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 02:12:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:48,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:48,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:49,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:49,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:49,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905981622] [2022-11-03 02:12:49,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905981622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:49,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:49,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:49,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080096088] [2022-11-03 02:12:49,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:49,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:49,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:49,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:49,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:49,346 INFO L87 Difference]: Start difference. First operand 577 states and 775 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:51,776 INFO L93 Difference]: Finished difference Result 2400 states and 3405 transitions. [2022-11-03 02:12:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:51,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:51,779 INFO L225 Difference]: With dead ends: 2400 [2022-11-03 02:12:51,779 INFO L226 Difference]: Without dead ends: 1955 [2022-11-03 02:12:51,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:51,780 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 3746 mSDsluCounter, 4976 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3746 SdHoareTripleChecker+Valid, 5647 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:51,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3746 Valid, 5647 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:12:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-11-03 02:12:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 579. [2022-11-03 02:12:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 1.3442906574394464) internal successors, (777), 578 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 777 transitions. [2022-11-03 02:12:51,793 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 777 transitions. Word has length 266 [2022-11-03 02:12:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:51,793 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 777 transitions. [2022-11-03 02:12:51,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 777 transitions. [2022-11-03 02:12:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:51,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:51,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:51,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-03 02:12:51,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:51,995 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:51,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:51,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1394890625, now seen corresponding path program 1 times [2022-11-03 02:12:51,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:51,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338529676] [2022-11-03 02:12:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:51,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:51,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:51,999 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:52,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 02:12:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:52,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:52,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:53,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:53,677 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:53,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338529676] [2022-11-03 02:12:53,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338529676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:53,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:53,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:53,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416596765] [2022-11-03 02:12:53,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:53,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:53,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:53,679 INFO L87 Difference]: Start difference. First operand 579 states and 777 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:56,083 INFO L93 Difference]: Finished difference Result 2410 states and 3416 transitions. [2022-11-03 02:12:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:12:56,084 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:12:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:56,086 INFO L225 Difference]: With dead ends: 2410 [2022-11-03 02:12:56,086 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 02:12:56,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:12:56,087 INFO L413 NwaCegarLoop]: 675 mSDtfsCounter, 3749 mSDsluCounter, 4977 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3749 SdHoareTripleChecker+Valid, 5652 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:56,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3749 Valid, 5652 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:12:56,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 02:12:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 581. [2022-11-03 02:12:56,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.3431034482758621) internal successors, (779), 580 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 779 transitions. [2022-11-03 02:12:56,100 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 779 transitions. Word has length 266 [2022-11-03 02:12:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:56,100 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 779 transitions. [2022-11-03 02:12:56,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 779 transitions. [2022-11-03 02:12:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:12:56,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:56,102 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:56,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:56,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:56,304 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:56,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1513291261, now seen corresponding path program 1 times [2022-11-03 02:12:56,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:56,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480241110] [2022-11-03 02:12:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:56,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:56,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:56,308 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:56,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 02:12:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:57,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:12:57,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:58,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:58,004 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:58,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480241110] [2022-11-03 02:12:58,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480241110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:58,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:58,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:12:58,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294332968] [2022-11-03 02:12:58,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:58,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:12:58,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:58,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:12:58,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:58,007 INFO L87 Difference]: Start difference. First operand 581 states and 779 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:00,423 INFO L93 Difference]: Finished difference Result 2428 states and 3439 transitions. [2022-11-03 02:13:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:00,426 INFO L225 Difference]: With dead ends: 2428 [2022-11-03 02:13:00,426 INFO L226 Difference]: Without dead ends: 1979 [2022-11-03 02:13:00,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:00,427 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 3759 mSDsluCounter, 4982 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3759 SdHoareTripleChecker+Valid, 5667 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:00,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3759 Valid, 5667 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-03 02:13:00,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 585. [2022-11-03 02:13:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 1.3424657534246576) internal successors, (784), 584 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 784 transitions. [2022-11-03 02:13:00,442 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 784 transitions. Word has length 266 [2022-11-03 02:13:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:00,443 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 784 transitions. [2022-11-03 02:13:00,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 784 transitions. [2022-11-03 02:13:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:00,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:00,445 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:00,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-03 02:13:00,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:00,645 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:00,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash 753089925, now seen corresponding path program 1 times [2022-11-03 02:13:00,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:00,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816325211] [2022-11-03 02:13:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:00,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:00,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:00,648 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:00,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 02:13:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:01,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:01,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:02,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:02,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:02,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816325211] [2022-11-03 02:13:02,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816325211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:02,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:02,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:02,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008671383] [2022-11-03 02:13:02,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:02,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:02,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:02,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:02,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:02,346 INFO L87 Difference]: Start difference. First operand 585 states and 784 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:04,765 INFO L93 Difference]: Finished difference Result 2440 states and 3453 transitions. [2022-11-03 02:13:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:04,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:04,767 INFO L225 Difference]: With dead ends: 2440 [2022-11-03 02:13:04,767 INFO L226 Difference]: Without dead ends: 1987 [2022-11-03 02:13:04,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:04,769 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 3762 mSDsluCounter, 4983 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3762 SdHoareTripleChecker+Valid, 5672 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:04,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3762 Valid, 5672 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-11-03 02:13:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 587. [2022-11-03 02:13:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.341296928327645) internal successors, (786), 586 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 786 transitions. [2022-11-03 02:13:04,782 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 786 transitions. Word has length 266 [2022-11-03 02:13:04,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:04,782 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 786 transitions. [2022-11-03 02:13:04,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:04,782 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 786 transitions. [2022-11-03 02:13:04,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:04,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:04,784 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:04,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-03 02:13:04,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:04,984 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:04,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:04,985 INFO L85 PathProgramCache]: Analyzing trace with hash 737571207, now seen corresponding path program 1 times [2022-11-03 02:13:04,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:04,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814849080] [2022-11-03 02:13:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:04,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:04,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:04,987 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:04,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 02:13:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:05,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:05,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:06,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:06,684 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:06,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814849080] [2022-11-03 02:13:06,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814849080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:06,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:06,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:06,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992368829] [2022-11-03 02:13:06,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:06,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:06,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:06,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:06,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:06,686 INFO L87 Difference]: Start difference. First operand 587 states and 786 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:09,103 INFO L93 Difference]: Finished difference Result 2450 states and 3464 transitions. [2022-11-03 02:13:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:09,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:09,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:09,115 INFO L225 Difference]: With dead ends: 2450 [2022-11-03 02:13:09,115 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 02:13:09,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:09,116 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 3765 mSDsluCounter, 4984 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3765 SdHoareTripleChecker+Valid, 5677 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:09,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3765 Valid, 5677 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 02:13:09,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 589. [2022-11-03 02:13:09,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 1.3401360544217686) internal successors, (788), 588 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 788 transitions. [2022-11-03 02:13:09,135 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 788 transitions. Word has length 266 [2022-11-03 02:13:09,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:09,136 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 788 transitions. [2022-11-03 02:13:09,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:09,136 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 788 transitions. [2022-11-03 02:13:09,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:09,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:09,138 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:09,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:09,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:09,360 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:09,361 INFO L85 PathProgramCache]: Analyzing trace with hash 384482825, now seen corresponding path program 1 times [2022-11-03 02:13:09,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:09,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690443187] [2022-11-03 02:13:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:09,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:09,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:09,364 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:09,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-03 02:13:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:10,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:11,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:11,078 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:11,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690443187] [2022-11-03 02:13:11,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690443187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:11,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:11,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:11,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615868180] [2022-11-03 02:13:11,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:11,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:11,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:11,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:11,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:11,080 INFO L87 Difference]: Start difference. First operand 589 states and 788 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:13,524 INFO L93 Difference]: Finished difference Result 2460 states and 3475 transitions. [2022-11-03 02:13:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:13,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:13,527 INFO L225 Difference]: With dead ends: 2460 [2022-11-03 02:13:13,527 INFO L226 Difference]: Without dead ends: 2003 [2022-11-03 02:13:13,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:13,528 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 3768 mSDsluCounter, 4985 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3768 SdHoareTripleChecker+Valid, 5682 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:13,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3768 Valid, 5682 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-11-03 02:13:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 591. [2022-11-03 02:13:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.3389830508474576) internal successors, (790), 590 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 790 transitions. [2022-11-03 02:13:13,541 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 790 transitions. Word has length 266 [2022-11-03 02:13:13,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:13,542 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 790 transitions. [2022-11-03 02:13:13,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:13,542 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 790 transitions. [2022-11-03 02:13:13,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:13,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:13,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:13,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-03 02:13:13,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:13,744 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1277969163, now seen corresponding path program 1 times [2022-11-03 02:13:13,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:13,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525179254] [2022-11-03 02:13:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:13,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:13,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:13,747 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:13,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-03 02:13:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:14,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:14,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:15,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:15,466 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:15,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525179254] [2022-11-03 02:13:15,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525179254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:15,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:15,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487987445] [2022-11-03 02:13:15,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:15,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:15,468 INFO L87 Difference]: Start difference. First operand 591 states and 790 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:17,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:17,933 INFO L93 Difference]: Finished difference Result 2470 states and 3486 transitions. [2022-11-03 02:13:17,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:17,934 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:17,936 INFO L225 Difference]: With dead ends: 2470 [2022-11-03 02:13:17,936 INFO L226 Difference]: Without dead ends: 2011 [2022-11-03 02:13:17,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:17,937 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 3771 mSDsluCounter, 4986 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 5687 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:17,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3771 Valid, 5687 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-11-03 02:13:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 593. [2022-11-03 02:13:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 1.337837837837838) internal successors, (792), 592 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 792 transitions. [2022-11-03 02:13:17,953 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 792 transitions. Word has length 266 [2022-11-03 02:13:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:17,953 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 792 transitions. [2022-11-03 02:13:17,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 792 transitions. [2022-11-03 02:13:17,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:17,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:17,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:17,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-03 02:13:18,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:18,155 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash 380575885, now seen corresponding path program 1 times [2022-11-03 02:13:18,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:18,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994536337] [2022-11-03 02:13:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:18,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:18,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:18,158 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:18,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 02:13:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:19,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:19,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:19,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:19,901 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:19,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994536337] [2022-11-03 02:13:19,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994536337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:19,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:19,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:19,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698838194] [2022-11-03 02:13:19,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:19,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:19,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:19,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:19,903 INFO L87 Difference]: Start difference. First operand 593 states and 792 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:22,361 INFO L93 Difference]: Finished difference Result 2480 states and 3497 transitions. [2022-11-03 02:13:22,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:22,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:22,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:22,363 INFO L225 Difference]: With dead ends: 2480 [2022-11-03 02:13:22,364 INFO L226 Difference]: Without dead ends: 2019 [2022-11-03 02:13:22,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:22,365 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 3774 mSDsluCounter, 4987 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3774 SdHoareTripleChecker+Valid, 5692 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:22,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3774 Valid, 5692 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1636 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:22,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-11-03 02:13:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 595. [2022-11-03 02:13:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.3367003367003367) internal successors, (794), 594 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 794 transitions. [2022-11-03 02:13:22,377 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 794 transitions. Word has length 266 [2022-11-03 02:13:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:22,378 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 794 transitions. [2022-11-03 02:13:22,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 794 transitions. [2022-11-03 02:13:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:22,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:22,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:22,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-03 02:13:22,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:22,580 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash 804222607, now seen corresponding path program 1 times [2022-11-03 02:13:22,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:22,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19402205] [2022-11-03 02:13:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:22,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:22,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:22,583 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:22,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-03 02:13:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:23,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:23,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:24,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:24,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:24,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19402205] [2022-11-03 02:13:24,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19402205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:24,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:24,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:24,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329731569] [2022-11-03 02:13:24,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:24,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:24,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:24,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:24,451 INFO L87 Difference]: Start difference. First operand 595 states and 794 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:26,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:26,929 INFO L93 Difference]: Finished difference Result 2490 states and 3508 transitions. [2022-11-03 02:13:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:26,930 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:26,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:26,932 INFO L225 Difference]: With dead ends: 2490 [2022-11-03 02:13:26,932 INFO L226 Difference]: Without dead ends: 2027 [2022-11-03 02:13:26,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:26,933 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 3777 mSDsluCounter, 4988 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3777 SdHoareTripleChecker+Valid, 5697 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:26,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3777 Valid, 5697 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-11-03 02:13:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 597. [2022-11-03 02:13:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 1.3355704697986577) internal successors, (796), 596 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 796 transitions. [2022-11-03 02:13:26,945 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 796 transitions. Word has length 266 [2022-11-03 02:13:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:26,945 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 796 transitions. [2022-11-03 02:13:26,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 796 transitions. [2022-11-03 02:13:26,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:26,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:26,947 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:26,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-03 02:13:27,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:27,148 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:27,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:27,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1041144559, now seen corresponding path program 1 times [2022-11-03 02:13:27,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:27,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000581029] [2022-11-03 02:13:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:27,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:27,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:27,151 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:27,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 02:13:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:28,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:28,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:28,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:28,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:28,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000581029] [2022-11-03 02:13:28,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000581029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:28,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:28,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:28,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223058793] [2022-11-03 02:13:28,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:28,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:28,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:28,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:28,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:28,908 INFO L87 Difference]: Start difference. First operand 597 states and 796 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:31,405 INFO L93 Difference]: Finished difference Result 2500 states and 3519 transitions. [2022-11-03 02:13:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:31,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:31,407 INFO L225 Difference]: With dead ends: 2500 [2022-11-03 02:13:31,407 INFO L226 Difference]: Without dead ends: 2035 [2022-11-03 02:13:31,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:31,408 INFO L413 NwaCegarLoop]: 713 mSDtfsCounter, 3780 mSDsluCounter, 4989 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3780 SdHoareTripleChecker+Valid, 5702 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:31,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3780 Valid, 5702 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:13:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-11-03 02:13:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 599. [2022-11-03 02:13:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.334448160535117) internal successors, (798), 598 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 798 transitions. [2022-11-03 02:13:31,421 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 798 transitions. Word has length 266 [2022-11-03 02:13:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:31,421 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 798 transitions. [2022-11-03 02:13:31,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:31,421 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 798 transitions. [2022-11-03 02:13:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:31,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:31,422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:31,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-03 02:13:31,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:31,623 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:31,623 INFO L85 PathProgramCache]: Analyzing trace with hash -381613037, now seen corresponding path program 1 times [2022-11-03 02:13:31,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:31,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376866204] [2022-11-03 02:13:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:31,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:31,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:31,626 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:31,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 02:13:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:32,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:33,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:33,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:33,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376866204] [2022-11-03 02:13:33,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376866204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:33,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:33,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:33,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340628532] [2022-11-03 02:13:33,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:33,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:33,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:33,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:33,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:33,381 INFO L87 Difference]: Start difference. First operand 599 states and 798 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:35,793 INFO L93 Difference]: Finished difference Result 2422 states and 3412 transitions. [2022-11-03 02:13:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:35,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:35,795 INFO L225 Difference]: With dead ends: 2422 [2022-11-03 02:13:35,795 INFO L226 Difference]: Without dead ends: 1955 [2022-11-03 02:13:35,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:35,797 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 3728 mSDsluCounter, 4930 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3728 SdHoareTripleChecker+Valid, 5653 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:35,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3728 Valid, 5653 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-11-03 02:13:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 603. [2022-11-03 02:13:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 1.3338870431893688) internal successors, (803), 602 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 803 transitions. [2022-11-03 02:13:35,810 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 803 transitions. Word has length 266 [2022-11-03 02:13:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:35,810 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 803 transitions. [2022-11-03 02:13:35,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 803 transitions. [2022-11-03 02:13:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:35,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:35,812 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:35,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-03 02:13:36,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:36,012 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash -453999595, now seen corresponding path program 1 times [2022-11-03 02:13:36,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:36,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343230144] [2022-11-03 02:13:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:36,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:36,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:36,015 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:36,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 02:13:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:36,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:36,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:37,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:37,756 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:37,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343230144] [2022-11-03 02:13:37,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343230144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:37,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:37,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:37,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544732171] [2022-11-03 02:13:37,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:37,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:37,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:37,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:37,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:37,758 INFO L87 Difference]: Start difference. First operand 603 states and 803 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:40,158 INFO L93 Difference]: Finished difference Result 2434 states and 3426 transitions. [2022-11-03 02:13:40,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:40,159 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:40,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:40,161 INFO L225 Difference]: With dead ends: 2434 [2022-11-03 02:13:40,161 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 02:13:40,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:40,162 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 3731 mSDsluCounter, 4931 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3731 SdHoareTripleChecker+Valid, 5658 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:40,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3731 Valid, 5658 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:40,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 02:13:40,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 605. [2022-11-03 02:13:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.3327814569536425) internal successors, (805), 604 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 805 transitions. [2022-11-03 02:13:40,176 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 805 transitions. Word has length 266 [2022-11-03 02:13:40,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:40,176 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 805 transitions. [2022-11-03 02:13:40,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 805 transitions. [2022-11-03 02:13:40,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:40,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:40,178 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:40,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-03 02:13:40,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:40,378 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:40,379 INFO L85 PathProgramCache]: Analyzing trace with hash 247600279, now seen corresponding path program 1 times [2022-11-03 02:13:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:40,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892336796] [2022-11-03 02:13:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:40,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:40,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:40,381 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:40,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 02:13:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:41,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:42,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:42,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:42,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892336796] [2022-11-03 02:13:42,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892336796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:42,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:42,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:42,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463341134] [2022-11-03 02:13:42,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:42,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:42,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:42,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:42,173 INFO L87 Difference]: Start difference. First operand 605 states and 805 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:44,608 INFO L93 Difference]: Finished difference Result 2444 states and 3437 transitions. [2022-11-03 02:13:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:44,611 INFO L225 Difference]: With dead ends: 2444 [2022-11-03 02:13:44,611 INFO L226 Difference]: Without dead ends: 1971 [2022-11-03 02:13:44,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:44,612 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 3734 mSDsluCounter, 4932 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3734 SdHoareTripleChecker+Valid, 5663 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:44,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3734 Valid, 5663 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-11-03 02:13:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 607. [2022-11-03 02:13:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 1.3316831683168318) internal successors, (807), 606 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 807 transitions. [2022-11-03 02:13:44,627 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 807 transitions. Word has length 266 [2022-11-03 02:13:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:44,627 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 807 transitions. [2022-11-03 02:13:44,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 807 transitions. [2022-11-03 02:13:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:44,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:44,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:44,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-03 02:13:44,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:44,829 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1633803673, now seen corresponding path program 1 times [2022-11-03 02:13:44,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:44,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239701186] [2022-11-03 02:13:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:44,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:44,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:44,832 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:44,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 02:13:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:45,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:45,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:46,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:46,526 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:46,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239701186] [2022-11-03 02:13:46,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239701186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:46,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:46,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:46,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627761628] [2022-11-03 02:13:46,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:46,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:46,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:46,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:46,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:46,528 INFO L87 Difference]: Start difference. First operand 607 states and 807 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:48,888 INFO L93 Difference]: Finished difference Result 2454 states and 3448 transitions. [2022-11-03 02:13:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:48,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:48,890 INFO L225 Difference]: With dead ends: 2454 [2022-11-03 02:13:48,890 INFO L226 Difference]: Without dead ends: 1979 [2022-11-03 02:13:48,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:48,891 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 3737 mSDsluCounter, 4933 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3737 SdHoareTripleChecker+Valid, 5668 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:48,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3737 Valid, 5668 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-03 02:13:48,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 609. [2022-11-03 02:13:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.330592105263158) internal successors, (809), 608 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 809 transitions. [2022-11-03 02:13:48,905 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 809 transitions. Word has length 266 [2022-11-03 02:13:48,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:48,905 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 809 transitions. [2022-11-03 02:13:48,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 809 transitions. [2022-11-03 02:13:48,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:48,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:48,907 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:48,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:49,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:49,107 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash -737935589, now seen corresponding path program 1 times [2022-11-03 02:13:49,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:49,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127128559] [2022-11-03 02:13:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:49,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:49,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:49,111 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:49,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-03 02:13:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:50,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:50,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:50,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:50,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127128559] [2022-11-03 02:13:50,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127128559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:50,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:50,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:50,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603200758] [2022-11-03 02:13:50,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:50,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:50,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:50,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:50,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:50,928 INFO L87 Difference]: Start difference. First operand 609 states and 809 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:53,403 INFO L93 Difference]: Finished difference Result 2464 states and 3459 transitions. [2022-11-03 02:13:53,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:53,404 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:53,405 INFO L225 Difference]: With dead ends: 2464 [2022-11-03 02:13:53,405 INFO L226 Difference]: Without dead ends: 1987 [2022-11-03 02:13:53,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:53,406 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 3740 mSDsluCounter, 4934 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3740 SdHoareTripleChecker+Valid, 5673 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:53,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3740 Valid, 5673 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-11-03 02:13:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 611. [2022-11-03 02:13:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 1.3295081967213114) internal successors, (811), 610 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 811 transitions. [2022-11-03 02:13:53,421 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 811 transitions. Word has length 266 [2022-11-03 02:13:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:53,421 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 811 transitions. [2022-11-03 02:13:53,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 811 transitions. [2022-11-03 02:13:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:53,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:53,423 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:53,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2022-11-03 02:13:53,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:53,623 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:53,624 INFO L85 PathProgramCache]: Analyzing trace with hash -597386979, now seen corresponding path program 1 times [2022-11-03 02:13:53,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:53,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819324794] [2022-11-03 02:13:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:53,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:53,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:53,627 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:53,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 02:13:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:54,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:54,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:55,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:55,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819324794] [2022-11-03 02:13:55,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819324794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:55,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:55,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:55,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965213720] [2022-11-03 02:13:55,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:55,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:55,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:55,440 INFO L87 Difference]: Start difference. First operand 611 states and 811 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:57,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:57,905 INFO L93 Difference]: Finished difference Result 2474 states and 3470 transitions. [2022-11-03 02:13:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:13:57,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:13:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:57,907 INFO L225 Difference]: With dead ends: 2474 [2022-11-03 02:13:57,907 INFO L226 Difference]: Without dead ends: 1995 [2022-11-03 02:13:57,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:13:57,908 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 3743 mSDsluCounter, 4935 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 5678 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:57,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 5678 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1649 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:13:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-03 02:13:57,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 613. [2022-11-03 02:13:57,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 1.3284313725490196) internal successors, (813), 612 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 813 transitions. [2022-11-03 02:13:57,922 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 813 transitions. Word has length 266 [2022-11-03 02:13:57,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:57,922 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 813 transitions. [2022-11-03 02:13:57,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 813 transitions. [2022-11-03 02:13:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:13:57,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:57,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:57,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:58,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:58,128 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:58,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:58,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1892141983, now seen corresponding path program 1 times [2022-11-03 02:13:58,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:58,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896256115] [2022-11-03 02:13:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:58,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:58,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:58,132 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:58,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-03 02:13:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:59,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:13:59,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:59,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:59,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:59,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896256115] [2022-11-03 02:13:59,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896256115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:59,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:59,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:13:59,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286632842] [2022-11-03 02:13:59,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:59,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:13:59,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:59,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:13:59,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:59,999 INFO L87 Difference]: Start difference. First operand 613 states and 813 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:02,447 INFO L93 Difference]: Finished difference Result 2492 states and 3493 transitions. [2022-11-03 02:14:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:14:02,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:14:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:02,450 INFO L225 Difference]: With dead ends: 2492 [2022-11-03 02:14:02,450 INFO L226 Difference]: Without dead ends: 2011 [2022-11-03 02:14:02,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:14:02,452 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 3753 mSDsluCounter, 4940 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3753 SdHoareTripleChecker+Valid, 5693 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:02,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3753 Valid, 5693 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:14:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-11-03 02:14:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 617. [2022-11-03 02:14:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 1.327922077922078) internal successors, (818), 616 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 818 transitions. [2022-11-03 02:14:02,477 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 818 transitions. Word has length 266 [2022-11-03 02:14:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:02,478 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 818 transitions. [2022-11-03 02:14:02,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 818 transitions. [2022-11-03 02:14:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:14:02,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:02,479 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:02,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:02,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:02,680 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash 203198241, now seen corresponding path program 1 times [2022-11-03 02:14:02,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:02,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366820056] [2022-11-03 02:14:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:02,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:02,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:02,684 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:02,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-03 02:14:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:03,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:14:03,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:04,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:04,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:04,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366820056] [2022-11-03 02:14:04,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366820056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:04,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:04,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:14:04,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589176981] [2022-11-03 02:14:04,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:04,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:14:04,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:04,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:14:04,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:14:04,634 INFO L87 Difference]: Start difference. First operand 617 states and 818 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:07,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:07,244 INFO L93 Difference]: Finished difference Result 2504 states and 3507 transitions. [2022-11-03 02:14:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:14:07,245 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:14:07,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:07,247 INFO L225 Difference]: With dead ends: 2504 [2022-11-03 02:14:07,247 INFO L226 Difference]: Without dead ends: 2019 [2022-11-03 02:14:07,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:14:07,249 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 3756 mSDsluCounter, 4941 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3756 SdHoareTripleChecker+Valid, 5698 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:07,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3756 Valid, 5698 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:14:07,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-11-03 02:14:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 619. [2022-11-03 02:14:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 1.3268608414239482) internal successors, (820), 618 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 820 transitions. [2022-11-03 02:14:07,268 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 820 transitions. Word has length 266 [2022-11-03 02:14:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:07,269 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 820 transitions. [2022-11-03 02:14:07,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 820 transitions. [2022-11-03 02:14:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:14:07,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:07,270 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:07,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Ended with exit code 0 [2022-11-03 02:14:07,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:07,476 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1385149661, now seen corresponding path program 1 times [2022-11-03 02:14:07,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:07,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596228915] [2022-11-03 02:14:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:07,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:07,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:07,484 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:07,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-03 02:14:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:08,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:14:08,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:09,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:09,279 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:09,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596228915] [2022-11-03 02:14:09,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596228915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:09,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:09,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:14:09,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938502376] [2022-11-03 02:14:09,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:09,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:14:09,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:09,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:14:09,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:14:09,281 INFO L87 Difference]: Start difference. First operand 619 states and 820 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:11,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:11,727 INFO L93 Difference]: Finished difference Result 2514 states and 3518 transitions. [2022-11-03 02:14:11,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:14:11,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:14:11,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:11,730 INFO L225 Difference]: With dead ends: 2514 [2022-11-03 02:14:11,730 INFO L226 Difference]: Without dead ends: 2027 [2022-11-03 02:14:11,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:14:11,731 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 3759 mSDsluCounter, 4942 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3759 SdHoareTripleChecker+Valid, 5703 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:11,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3759 Valid, 5703 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:14:11,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-11-03 02:14:11,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 621. [2022-11-03 02:14:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 1.3258064516129033) internal successors, (822), 620 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 822 transitions. [2022-11-03 02:14:11,747 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 822 transitions. Word has length 266 [2022-11-03 02:14:11,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:11,747 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 822 transitions. [2022-11-03 02:14:11,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 822 transitions. [2022-11-03 02:14:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:14:11,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:11,749 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:11,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:11,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:11,952 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:11,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1629953957, now seen corresponding path program 1 times [2022-11-03 02:14:11,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:11,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093523798] [2022-11-03 02:14:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:11,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:11,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:11,956 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:11,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 02:14:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:12,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:14:12,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:13,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:13,776 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:13,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093523798] [2022-11-03 02:14:13,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093523798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:13,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:13,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:14:13,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343525000] [2022-11-03 02:14:13,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:13,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:14:13,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:13,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:14:13,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:14:13,778 INFO L87 Difference]: Start difference. First operand 621 states and 822 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:16,188 INFO L93 Difference]: Finished difference Result 2524 states and 3529 transitions. [2022-11-03 02:14:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:14:16,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:14:16,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:16,191 INFO L225 Difference]: With dead ends: 2524 [2022-11-03 02:14:16,191 INFO L226 Difference]: Without dead ends: 2035 [2022-11-03 02:14:16,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:14:16,192 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 3762 mSDsluCounter, 4943 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3762 SdHoareTripleChecker+Valid, 5708 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:16,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3762 Valid, 5708 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:14:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-11-03 02:14:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 623. [2022-11-03 02:14:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 1.32475884244373) internal successors, (824), 622 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 824 transitions. [2022-11-03 02:14:16,207 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 824 transitions. Word has length 266 [2022-11-03 02:14:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:16,207 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 824 transitions. [2022-11-03 02:14:16,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 824 transitions. [2022-11-03 02:14:16,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:14:16,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:16,209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:16,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:16,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:16,413 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:16,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1043147943, now seen corresponding path program 1 times [2022-11-03 02:14:16,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:16,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368084419] [2022-11-03 02:14:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:16,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:16,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:16,416 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:16,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-03 02:14:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:17,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:14:17,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:18,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:18,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:18,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368084419] [2022-11-03 02:14:18,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368084419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:18,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:18,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:14:18,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626761290] [2022-11-03 02:14:18,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:18,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:14:18,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:18,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:14:18,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:14:18,389 INFO L87 Difference]: Start difference. First operand 623 states and 824 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:20,975 INFO L93 Difference]: Finished difference Result 2534 states and 3540 transitions. [2022-11-03 02:14:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:14:20,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:14:20,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:20,978 INFO L225 Difference]: With dead ends: 2534 [2022-11-03 02:14:20,978 INFO L226 Difference]: Without dead ends: 2043 [2022-11-03 02:14:20,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:14:20,979 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 3765 mSDsluCounter, 4944 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3765 SdHoareTripleChecker+Valid, 5713 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:20,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3765 Valid, 5713 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:14:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2022-11-03 02:14:20,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 625. [2022-11-03 02:14:20,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 1.3237179487179487) internal successors, (826), 624 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 826 transitions. [2022-11-03 02:14:20,995 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 826 transitions. Word has length 266 [2022-11-03 02:14:20,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:20,995 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 826 transitions. [2022-11-03 02:14:20,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 826 transitions. [2022-11-03 02:14:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:14:20,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:20,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:21,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Ended with exit code 0 [2022-11-03 02:14:21,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:21,197 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:21,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1744212521, now seen corresponding path program 1 times [2022-11-03 02:14:21,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:21,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527414903] [2022-11-03 02:14:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:21,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:21,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:21,201 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:21,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-03 02:14:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:22,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:14:22,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:23,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:23,103 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:23,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527414903] [2022-11-03 02:14:23,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527414903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:23,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:23,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:14:23,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315277332] [2022-11-03 02:14:23,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:23,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:14:23,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:23,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:14:23,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:14:23,105 INFO L87 Difference]: Start difference. First operand 625 states and 826 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:25,625 INFO L93 Difference]: Finished difference Result 2544 states and 3551 transitions. [2022-11-03 02:14:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:14:25,625 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:14:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:25,627 INFO L225 Difference]: With dead ends: 2544 [2022-11-03 02:14:25,628 INFO L226 Difference]: Without dead ends: 2051 [2022-11-03 02:14:25,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:14:25,629 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 3768 mSDsluCounter, 4945 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3768 SdHoareTripleChecker+Valid, 5718 SdHoareTripleChecker+Invalid, 1708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:25,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3768 Valid, 5718 Invalid, 1708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:14:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2022-11-03 02:14:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 627. [2022-11-03 02:14:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 1.3226837060702876) internal successors, (828), 626 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:25,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 828 transitions. [2022-11-03 02:14:25,642 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 828 transitions. Word has length 266 [2022-11-03 02:14:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:25,642 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 828 transitions. [2022-11-03 02:14:25,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 828 transitions. [2022-11-03 02:14:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:14:25,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:25,644 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:25,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-03 02:14:25,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:25,860 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:25,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:25,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1870696405, now seen corresponding path program 1 times [2022-11-03 02:14:25,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:25,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475028104] [2022-11-03 02:14:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:25,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:25,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:25,863 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:25,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 02:14:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:26,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:14:26,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:27,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:27,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:27,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475028104] [2022-11-03 02:14:27,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475028104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:27,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:27,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:14:27,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887334079] [2022-11-03 02:14:27,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:27,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:14:27,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:27,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:14:27,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:14:27,706 INFO L87 Difference]: Start difference. First operand 627 states and 828 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:30,318 INFO L93 Difference]: Finished difference Result 2554 states and 3562 transitions. [2022-11-03 02:14:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:14:30,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:14:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:30,321 INFO L225 Difference]: With dead ends: 2554 [2022-11-03 02:14:30,321 INFO L226 Difference]: Without dead ends: 2059 [2022-11-03 02:14:30,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:14:30,322 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 3771 mSDsluCounter, 4946 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 5723 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:30,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3771 Valid, 5723 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:14:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2022-11-03 02:14:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 629. [2022-11-03 02:14:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.321656050955414) internal successors, (830), 628 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 830 transitions. [2022-11-03 02:14:30,337 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 830 transitions. Word has length 266 [2022-11-03 02:14:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:30,337 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 830 transitions. [2022-11-03 02:14:30,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 830 transitions. [2022-11-03 02:14:30,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:14:30,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:30,338 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:30,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-03 02:14:30,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:30,539 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:30,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash -95689043, now seen corresponding path program 1 times [2022-11-03 02:14:30,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:30,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578074736] [2022-11-03 02:14:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:30,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:30,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:30,542 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:30,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-03 02:14:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:31,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:14:31,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:32,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:32,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:32,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578074736] [2022-11-03 02:14:32,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578074736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:32,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:32,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:14:32,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250879999] [2022-11-03 02:14:32,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:32,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:14:32,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:32,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:14:32,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:14:32,387 INFO L87 Difference]: Start difference. First operand 629 states and 830 transitions. Second operand has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:35,108 INFO L93 Difference]: Finished difference Result 2564 states and 3573 transitions. [2022-11-03 02:14:35,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:14:35,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:14:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:35,110 INFO L225 Difference]: With dead ends: 2564 [2022-11-03 02:14:35,110 INFO L226 Difference]: Without dead ends: 2067 [2022-11-03 02:14:35,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:14:35,111 INFO L413 NwaCegarLoop]: 781 mSDtfsCounter, 3774 mSDsluCounter, 4947 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3774 SdHoareTripleChecker+Valid, 5728 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:35,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3774 Valid, 5728 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 02:14:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2022-11-03 02:14:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 631. [2022-11-03 02:14:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 1.3206349206349206) internal successors, (832), 630 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 832 transitions. [2022-11-03 02:14:35,135 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 832 transitions. Word has length 266 [2022-11-03 02:14:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:35,136 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 832 transitions. [2022-11-03 02:14:35,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.6) internal successors, (266), 10 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 832 transitions. [2022-11-03 02:14:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:14:35,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:35,138 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:35,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Ended with exit code 0 [2022-11-03 02:14:35,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:35,365 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:35,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:35,366 INFO L85 PathProgramCache]: Analyzing trace with hash -93842001, now seen corresponding path program 1 times [2022-11-03 02:14:35,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:35,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053032436] [2022-11-03 02:14:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:35,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:35,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:35,369 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:35,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-03 02:14:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:36,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:14:36,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:37,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:39,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:39,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053032436] [2022-11-03 02:14:39,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053032436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [692162417] [2022-11-03 02:14:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:39,612 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:39,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:39,620 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:39,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-03 02:14:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:41,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:14:41,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:42,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:44,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [692162417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:44,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371317351] [2022-11-03 02:14:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:44,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:44,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:44,483 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:44,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-03 02:14:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:14:45,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:46,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:48,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371317351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:48,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:14:48,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 02:14:48,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605986931] [2022-11-03 02:14:48,474 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:14:48,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:14:48,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:48,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:14:48,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:14:48,477 INFO L87 Difference]: Start difference. First operand 631 states and 832 transitions. Second operand has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:48,833 INFO L93 Difference]: Finished difference Result 907 states and 1137 transitions. [2022-11-03 02:14:48,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:14:48,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:14:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:48,835 INFO L225 Difference]: With dead ends: 907 [2022-11-03 02:14:48,835 INFO L226 Difference]: Without dead ends: 905 [2022-11-03 02:14:48,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1595 GetRequests, 1574 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:14:48,836 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 274 mSDsluCounter, 3126 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:48,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 3444 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 196 Unchecked, 0.1s Time] [2022-11-03 02:14:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-11-03 02:14:48,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 888. [2022-11-03 02:14:48,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 1.2514092446448704) internal successors, (1110), 887 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1110 transitions. [2022-11-03 02:14:48,870 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1110 transitions. Word has length 266 [2022-11-03 02:14:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:48,871 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1110 transitions. [2022-11-03 02:14:48,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1110 transitions. [2022-11-03 02:14:48,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 02:14:48,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:48,873 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:48,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:49,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-11-03 02:14:49,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-11-03 02:14:49,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:49,489 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:49,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2036092461, now seen corresponding path program 1 times [2022-11-03 02:14:49,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:49,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486908036] [2022-11-03 02:14:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:49,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:49,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:49,492 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:49,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-03 02:14:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:50,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:14:50,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:50,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:50,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:50,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486908036] [2022-11-03 02:14:50,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486908036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:50,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:50,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:50,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291072154] [2022-11-03 02:14:50,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:50,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:50,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:50,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:50,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:50,789 INFO L87 Difference]: Start difference. First operand 888 states and 1110 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:51,030 INFO L93 Difference]: Finished difference Result 1885 states and 2478 transitions. [2022-11-03 02:14:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:51,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-03 02:14:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:51,033 INFO L225 Difference]: With dead ends: 1885 [2022-11-03 02:14:51,033 INFO L226 Difference]: Without dead ends: 1262 [2022-11-03 02:14:51,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 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 02:14:51,034 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 944 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:51,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 1143 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:14:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-11-03 02:14:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 764. [2022-11-03 02:14:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 1.2739187418086502) internal successors, (972), 763 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 972 transitions. [2022-11-03 02:14:51,066 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 972 transitions. Word has length 266 [2022-11-03 02:14:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:51,067 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 972 transitions. [2022-11-03 02:14:51,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 972 transitions. [2022-11-03 02:14:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:14:51,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:51,072 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:51,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:51,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:51,299 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:51,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:51,299 INFO L85 PathProgramCache]: Analyzing trace with hash -95889671, now seen corresponding path program 1 times [2022-11-03 02:14:51,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:51,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457408083] [2022-11-03 02:14:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:51,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:51,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:51,303 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:51,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-03 02:14:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:52,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:14:52,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:54,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:55,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:55,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457408083] [2022-11-03 02:14:55,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457408083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:55,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [585307415] [2022-11-03 02:14:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:55,363 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:55,365 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:55,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Waiting until timeout for monitored process [2022-11-03 02:14:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:14:57,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:14:57,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:58,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [585307415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:58,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:14:58,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:14:58,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747202966] [2022-11-03 02:14:58,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:58,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:58,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:58,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:58,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:14:58,003 INFO L87 Difference]: Start difference. First operand 764 states and 972 transitions. Second operand has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:58,217 INFO L93 Difference]: Finished difference Result 2489 states and 3278 transitions. [2022-11-03 02:14:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:14:58,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2022-11-03 02:14:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:58,221 INFO L225 Difference]: With dead ends: 2489 [2022-11-03 02:14:58,221 INFO L226 Difference]: Without dead ends: 1990 [2022-11-03 02:14:58,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:14:58,223 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 1352 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:58,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 2228 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:14:58,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2022-11-03 02:14:58,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 790. [2022-11-03 02:14:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 1.2801013941698351) internal successors, (1010), 789 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1010 transitions. [2022-11-03 02:14:58,258 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1010 transitions. Word has length 527 [2022-11-03 02:14:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:58,258 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 1010 transitions. [2022-11-03 02:14:58,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1010 transitions. [2022-11-03 02:14:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:14:58,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:58,263 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:58,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:58,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:58,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:58,677 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:58,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:58,678 INFO L85 PathProgramCache]: Analyzing trace with hash -341697545, now seen corresponding path program 1 times [2022-11-03 02:14:58,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:58,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135659420] [2022-11-03 02:14:58,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:58,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:58,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:58,682 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:58,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-03 02:15:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:00,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:15:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:01,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:02,370 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:02,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135659420] [2022-11-03 02:15:02,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135659420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:02,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [344552740] [2022-11-03 02:15:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:02,371 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:02,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:02,373 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:02,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-11-03 02:15:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:04,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:04,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:15:04,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:04,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [344552740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:04,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:04,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:15:04,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894002511] [2022-11-03 02:15:04,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:04,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:04,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:04,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:04,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:15:04,936 INFO L87 Difference]: Start difference. First operand 790 states and 1010 transitions. Second operand has 5 states, 5 states have (on average 102.2) internal successors, (511), 5 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:05,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:05,129 INFO L93 Difference]: Finished difference Result 2627 states and 3484 transitions. [2022-11-03 02:15:05,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:15:05,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 102.2) internal successors, (511), 5 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2022-11-03 02:15:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:05,133 INFO L225 Difference]: With dead ends: 2627 [2022-11-03 02:15:05,133 INFO L226 Difference]: Without dead ends: 2102 [2022-11-03 02:15:05,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:15:05,135 INFO L413 NwaCegarLoop]: 1001 mSDtfsCounter, 1377 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:05,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1377 Valid, 2288 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2022-11-03 02:15:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 862. [2022-11-03 02:15:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.2961672473867596) internal successors, (1116), 861 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1116 transitions. [2022-11-03 02:15:05,170 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1116 transitions. Word has length 527 [2022-11-03 02:15:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:05,170 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1116 transitions. [2022-11-03 02:15:05,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.2) internal successors, (511), 5 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1116 transitions. [2022-11-03 02:15:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:15:05,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:05,174 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:05,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-03 02:15:05,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Ended with exit code 0 [2022-11-03 02:15:05,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:05,594 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:05,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1939424373, now seen corresponding path program 1 times [2022-11-03 02:15:05,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:05,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414566201] [2022-11-03 02:15:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:05,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:05,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:05,599 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:05,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-03 02:15:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:15:07,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:08,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:09,374 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:09,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414566201] [2022-11-03 02:15:09,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414566201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:09,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [568779782] [2022-11-03 02:15:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:09,375 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:09,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:09,376 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:09,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (118)] Waiting until timeout for monitored process [2022-11-03 02:15:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:11,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:11,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:15:12,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:12,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [568779782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:12,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:12,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:15:12,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236278798] [2022-11-03 02:15:12,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:12,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:12,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:12,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:15:12,083 INFO L87 Difference]: Start difference. First operand 862 states and 1116 transitions. Second operand has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:12,333 INFO L93 Difference]: Finished difference Result 2967 states and 3997 transitions. [2022-11-03 02:15:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:15:12,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2022-11-03 02:15:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:12,338 INFO L225 Difference]: With dead ends: 2967 [2022-11-03 02:15:12,338 INFO L226 Difference]: Without dead ends: 2370 [2022-11-03 02:15:12,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:15:12,341 INFO L413 NwaCegarLoop]: 952 mSDtfsCounter, 1314 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:12,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1314 Valid, 2249 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:12,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2022-11-03 02:15:12,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1048. [2022-11-03 02:15:12,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 1.326647564469914) internal successors, (1389), 1047 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1389 transitions. [2022-11-03 02:15:12,375 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1389 transitions. Word has length 527 [2022-11-03 02:15:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:12,376 INFO L495 AbstractCegarLoop]: Abstraction has 1048 states and 1389 transitions. [2022-11-03 02:15:12,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1389 transitions. [2022-11-03 02:15:12,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:15:12,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:12,380 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:12,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Ended with exit code 0 [2022-11-03 02:15:12,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (118)] Ended with exit code 0 [2022-11-03 02:15:12,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:12,781 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:12,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1440867571, now seen corresponding path program 1 times [2022-11-03 02:15:12,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:12,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538990112] [2022-11-03 02:15:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:12,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:12,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:12,785 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:12,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-03 02:15:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:14,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:15:14,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:15,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:16,477 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:16,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538990112] [2022-11-03 02:15:16,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538990112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:16,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1967735076] [2022-11-03 02:15:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:16,478 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:16,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:16,479 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:16,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (120)] Waiting until timeout for monitored process [2022-11-03 02:15:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:19,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:19,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 02:15:19,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:19,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1967735076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:19,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:19,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:15:19,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756957744] [2022-11-03 02:15:19,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:19,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:19,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:19,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:19,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:15:19,138 INFO L87 Difference]: Start difference. First operand 1048 states and 1389 transitions. Second operand has 5 states, 5 states have (on average 95.2) internal successors, (476), 5 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:19,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:19,303 INFO L93 Difference]: Finished difference Result 3664 states and 5019 transitions. [2022-11-03 02:15:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:15:19,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 95.2) internal successors, (476), 5 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2022-11-03 02:15:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:19,307 INFO L225 Difference]: With dead ends: 3664 [2022-11-03 02:15:19,307 INFO L226 Difference]: Without dead ends: 2881 [2022-11-03 02:15:19,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:15:19,309 INFO L413 NwaCegarLoop]: 1112 mSDtfsCounter, 1329 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:19,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 2583 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2022-11-03 02:15:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 1180. [2022-11-03 02:15:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 1.3375742154368109) internal successors, (1577), 1179 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:19,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1577 transitions. [2022-11-03 02:15:19,352 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1577 transitions. Word has length 527 [2022-11-03 02:15:19,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:19,353 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 1577 transitions. [2022-11-03 02:15:19,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.2) internal successors, (476), 5 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1577 transitions. [2022-11-03 02:15:19,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:15:19,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:19,358 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:19,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (119)] Ended with exit code 0 [2022-11-03 02:15:19,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (120)] Ended with exit code 0 [2022-11-03 02:15:19,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:19,785 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:19,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1055005169, now seen corresponding path program 1 times [2022-11-03 02:15:19,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:19,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057136243] [2022-11-03 02:15:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:19,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:19,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:19,789 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:19,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-03 02:15:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:21,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:15:21,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:22,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:23,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:23,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057136243] [2022-11-03 02:15:23,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057136243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:23,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1814461109] [2022-11-03 02:15:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:23,465 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:23,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:23,466 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:23,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (122)] Waiting until timeout for monitored process [2022-11-03 02:15:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:25,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:25,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-03 02:15:26,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:26,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1814461109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:26,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:26,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 02:15:26,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440662568] [2022-11-03 02:15:26,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:26,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:26,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:26,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:26,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:15:26,013 INFO L87 Difference]: Start difference. First operand 1180 states and 1577 transitions. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:26,264 INFO L93 Difference]: Finished difference Result 4298 states and 5920 transitions. [2022-11-03 02:15:26,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:15:26,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2022-11-03 02:15:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:26,268 INFO L225 Difference]: With dead ends: 4298 [2022-11-03 02:15:26,269 INFO L226 Difference]: Without dead ends: 3383 [2022-11-03 02:15:26,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1567 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:15:26,271 INFO L413 NwaCegarLoop]: 1110 mSDtfsCounter, 1322 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 2584 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:26,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 2584 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2022-11-03 02:15:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 1436. [2022-11-03 02:15:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 1.3526132404181184) internal successors, (1941), 1435 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 1941 transitions. [2022-11-03 02:15:26,328 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 1941 transitions. Word has length 527 [2022-11-03 02:15:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:26,329 INFO L495 AbstractCegarLoop]: Abstraction has 1436 states and 1941 transitions. [2022-11-03 02:15:26,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 1941 transitions. [2022-11-03 02:15:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:15:26,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:26,336 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:26,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (121)] Ended with exit code 0 [2022-11-03 02:15:26,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (122)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:26,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:26,737 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:26,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1308836493, now seen corresponding path program 1 times [2022-11-03 02:15:26,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:26,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015125905] [2022-11-03 02:15:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:26,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:26,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:26,743 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:26,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-03 02:15:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:28,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:15:28,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:29,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 261 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:30,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:30,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015125905] [2022-11-03 02:15:30,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015125905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:30,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1920357097] [2022-11-03 02:15:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:30,663 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:30,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:30,664 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:30,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (124)] Waiting until timeout for monitored process [2022-11-03 02:15:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:34,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:34,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 197 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:34,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 254 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:35,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1920357097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:35,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795925957] [2022-11-03 02:15:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:35,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:35,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:35,538 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:35,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-11-03 02:15:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:36,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:15:36,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:15:38,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 255 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:15:40,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795925957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:40,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:15:40,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 28 [2022-11-03 02:15:40,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926011106] [2022-11-03 02:15:40,618 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:40,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:15:40,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:40,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:15:40,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:15:40,622 INFO L87 Difference]: Start difference. First operand 1436 states and 1941 transitions. Second operand has 28 states, 28 states have (on average 61.142857142857146) internal successors, (1712), 28 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:03,228 INFO L93 Difference]: Finished difference Result 54658 states and 76766 transitions. [2022-11-03 02:16:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-03 02:16:03,229 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 61.142857142857146) internal successors, (1712), 28 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2022-11-03 02:16:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:03,254 INFO L225 Difference]: With dead ends: 54658 [2022-11-03 02:16:03,255 INFO L226 Difference]: Without dead ends: 53487 [2022-11-03 02:16:03,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3284 GetRequests, 3130 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9093 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=4623, Invalid=19557, Unknown=0, NotChecked=0, Total=24180 [2022-11-03 02:16:03,261 INFO L413 NwaCegarLoop]: 919 mSDtfsCounter, 30901 mSDsluCounter, 18337 mSDsCounter, 0 mSdLazyCounter, 5077 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30901 SdHoareTripleChecker+Valid, 19256 SdHoareTripleChecker+Invalid, 5485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 5077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:03,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30901 Valid, 19256 Invalid, 5485 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [408 Valid, 5077 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-03 02:16:03,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53487 states. [2022-11-03 02:16:03,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53487 to 4743. [2022-11-03 02:16:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4742 states have (on average 1.388021931674399) internal successors, (6582), 4742 states have internal predecessors, (6582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:03,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 6582 transitions. [2022-11-03 02:16:03,641 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 6582 transitions. Word has length 527 [2022-11-03 02:16:03,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:03,642 INFO L495 AbstractCegarLoop]: Abstraction has 4743 states and 6582 transitions. [2022-11-03 02:16:03,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 61.142857142857146) internal successors, (1712), 28 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:03,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 6582 transitions. [2022-11-03 02:16:03,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:16:03,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:03,650 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:03,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:03,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:04,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (124)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:04,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:16:04,277 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1376418823, now seen corresponding path program 1 times [2022-11-03 02:16:04,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:04,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777401760] [2022-11-03 02:16:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:04,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:04,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:04,282 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:04,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-03 02:16:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:05,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:16:05,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 253 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:16:06,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 253 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:16:08,624 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:08,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777401760] [2022-11-03 02:16:08,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777401760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:08,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1633877254] [2022-11-03 02:16:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:08,625 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:16:08,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:16:08,629 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:16:08,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (127)] Waiting until timeout for monitored process [2022-11-03 02:16:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:11,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:16:11,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 139 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:16:13,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 139 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:16:15,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1633877254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:15,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274852481] [2022-11-03 02:16:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:15,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:15,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:15,904 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:15,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-11-03 02:16:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:16:17,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 253 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:16:18,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 253 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:16:19,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274852481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:19,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:16:19,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17, 17, 6, 6] total 37 [2022-11-03 02:16:19,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422421740] [2022-11-03 02:16:19,364 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:16:19,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:16:19,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:19,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:16:19,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:16:19,367 INFO L87 Difference]: Start difference. First operand 4743 states and 6582 transitions. Second operand has 37 states, 37 states have (on average 40.054054054054056) internal successors, (1482), 37 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:57,419 INFO L93 Difference]: Finished difference Result 81845 states and 116634 transitions. [2022-11-03 02:16:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-11-03 02:16:57,422 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 40.054054054054056) internal successors, (1482), 37 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2022-11-03 02:16:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:57,539 INFO L225 Difference]: With dead ends: 81845 [2022-11-03 02:16:57,539 INFO L226 Difference]: Without dead ends: 77379 [2022-11-03 02:16:57,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3348 GetRequests, 3125 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17176 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=8025, Invalid=41927, Unknown=0, NotChecked=0, Total=49952 [2022-11-03 02:16:57,561 INFO L413 NwaCegarLoop]: 1260 mSDtfsCounter, 28674 mSDsluCounter, 22955 mSDsCounter, 0 mSdLazyCounter, 3419 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28674 SdHoareTripleChecker+Valid, 24215 SdHoareTripleChecker+Invalid, 14369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 3419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10578 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:57,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28674 Valid, 24215 Invalid, 14369 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [372 Valid, 3419 Invalid, 0 Unknown, 10578 Unchecked, 7.1s Time] [2022-11-03 02:16:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77379 states. [2022-11-03 02:16:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77379 to 5733. [2022-11-03 02:16:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5733 states, 5732 states have (on average 1.4012561060711795) internal successors, (8032), 5732 states have internal predecessors, (8032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5733 states to 5733 states and 8032 transitions. [2022-11-03 02:16:58,508 INFO L78 Accepts]: Start accepts. Automaton has 5733 states and 8032 transitions. Word has length 527 [2022-11-03 02:16:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:58,508 INFO L495 AbstractCegarLoop]: Abstraction has 5733 states and 8032 transitions. [2022-11-03 02:16:58,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 40.054054054054056) internal successors, (1482), 37 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 5733 states and 8032 transitions. [2022-11-03 02:16:58,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:16:58,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:58,518 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:58,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (127)] Ended with exit code 0 [2022-11-03 02:16:58,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:58,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:59,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:59,121 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2126738685, now seen corresponding path program 1 times [2022-11-03 02:16:59,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:59,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006073538] [2022-11-03 02:16:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:59,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:59,128 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:59,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2022-11-03 02:17:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:00,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:17:00,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:17:02,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:17:05,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:05,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006073538] [2022-11-03 02:17:05,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006073538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:05,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1997282244] [2022-11-03 02:17:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:05,338 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:05,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:17:05,339 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:17:05,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (130)] Waiting until timeout for monitored process [2022-11-03 02:17:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:09,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:17:09,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 137 proven. 51 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:17:11,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 137 proven. 51 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:17:15,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1997282244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:15,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126655691] [2022-11-03 02:17:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:15,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:15,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:15,237 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:15,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-11-03 02:17:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:17:16,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:17:18,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 251 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:17:20,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126655691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:20,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:17:20,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17, 17, 6, 6] total 37 [2022-11-03 02:17:20,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345904899] [2022-11-03 02:17:20,857 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:17:20,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:17:20,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:20,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:17:20,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:17:20,859 INFO L87 Difference]: Start difference. First operand 5733 states and 8032 transitions. Second operand has 37 states, 37 states have (on average 40.108108108108105) internal successors, (1484), 37 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:22,656 INFO L93 Difference]: Finished difference Result 104503 states and 149031 transitions. [2022-11-03 02:18:22,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2022-11-03 02:18:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 40.108108108108105) internal successors, (1484), 37 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2022-11-03 02:18:22,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:22,829 INFO L225 Difference]: With dead ends: 104503 [2022-11-03 02:18:22,830 INFO L226 Difference]: Without dead ends: 99051 [2022-11-03 02:18:22,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3463 GetRequests, 3134 SyntacticMatches, 1 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42385 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=14920, Invalid=93650, Unknown=0, NotChecked=0, Total=108570 [2022-11-03 02:18:22,876 INFO L413 NwaCegarLoop]: 1125 mSDtfsCounter, 30471 mSDsluCounter, 25654 mSDsCounter, 0 mSdLazyCounter, 4490 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30471 SdHoareTripleChecker+Valid, 26779 SdHoareTripleChecker+Invalid, 16342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 4490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11414 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:22,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30471 Valid, 26779 Invalid, 16342 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [438 Valid, 4490 Invalid, 0 Unknown, 11414 Unchecked, 10.3s Time] [2022-11-03 02:18:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99051 states. [2022-11-03 02:18:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99051 to 5747. [2022-11-03 02:18:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5747 states, 5746 states have (on average 1.4002784545770972) internal successors, (8046), 5746 states have internal predecessors, (8046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5747 states to 5747 states and 8046 transitions. [2022-11-03 02:18:23,977 INFO L78 Accepts]: Start accepts. Automaton has 5747 states and 8046 transitions. Word has length 527 [2022-11-03 02:18:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:23,977 INFO L495 AbstractCegarLoop]: Abstraction has 5747 states and 8046 transitions. [2022-11-03 02:18:23,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 40.108108108108105) internal successors, (1484), 37 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5747 states and 8046 transitions. [2022-11-03 02:18:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:18:23,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:23,985 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:18:24,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:24,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (129)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:24,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (130)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:24,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:18:24,587 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:24,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:24,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1918773503, now seen corresponding path program 1 times [2022-11-03 02:18:24,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:24,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784285098] [2022-11-03 02:18:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:24,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:24,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:24,594 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:24,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-03 02:18:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:26,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:18:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 249 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:18:28,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 249 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:18:30,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:30,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784285098] [2022-11-03 02:18:30,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784285098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:30,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [35431930] [2022-11-03 02:18:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:30,410 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:18:30,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:18:30,412 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:18:30,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (133)] Waiting until timeout for monitored process [2022-11-03 02:18:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:34,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:18:34,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 135 proven. 53 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:18:37,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 135 proven. 53 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:18:41,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [35431930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:41,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133759073] [2022-11-03 02:18:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:41,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:41,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:41,932 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:41,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-11-03 02:18:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:43,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:18:43,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 249 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:18:45,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 249 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:18:47,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133759073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:47,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:18:47,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17, 17, 6, 6] total 37 [2022-11-03 02:18:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317475057] [2022-11-03 02:18:47,583 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:47,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:18:47,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:18:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:18:47,586 INFO L87 Difference]: Start difference. First operand 5747 states and 8046 transitions. Second operand has 37 states, 37 states have (on average 40.16216216216216) internal successors, (1486), 37 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:29,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:29,570 INFO L93 Difference]: Finished difference Result 87839 states and 124672 transitions. [2022-11-03 02:19:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-11-03 02:19:29,571 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 40.16216216216216) internal successors, (1486), 37 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2022-11-03 02:19:29,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:29,640 INFO L225 Difference]: With dead ends: 87839 [2022-11-03 02:19:29,640 INFO L226 Difference]: Without dead ends: 82377 [2022-11-03 02:19:29,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3358 GetRequests, 3121 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20025 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=9257, Invalid=47149, Unknown=0, NotChecked=0, Total=56406 [2022-11-03 02:19:29,660 INFO L413 NwaCegarLoop]: 746 mSDtfsCounter, 34410 mSDsluCounter, 17775 mSDsCounter, 0 mSdLazyCounter, 2972 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34410 SdHoareTripleChecker+Valid, 18521 SdHoareTripleChecker+Invalid, 12624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 2972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9178 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:29,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34410 Valid, 18521 Invalid, 12624 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [474 Valid, 2972 Invalid, 0 Unknown, 9178 Unchecked, 7.1s Time] [2022-11-03 02:19:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82377 states. [2022-11-03 02:19:30,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82377 to 5761. [2022-11-03 02:19:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 5760 states have (on average 1.3993055555555556) internal successors, (8060), 5760 states have internal predecessors, (8060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 8060 transitions. [2022-11-03 02:19:30,548 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 8060 transitions. Word has length 527 [2022-11-03 02:19:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:30,549 INFO L495 AbstractCegarLoop]: Abstraction has 5761 states and 8060 transitions. [2022-11-03 02:19:30,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 40.16216216216216) internal successors, (1486), 37 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 8060 transitions. [2022-11-03 02:19:30,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:19:30,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:30,558 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:30,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (133)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:30,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-11-03 02:19:30,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (132)] Ended with exit code 0 [2022-11-03 02:19:31,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:19:31,160 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:31,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1442376197, now seen corresponding path program 1 times [2022-11-03 02:19:31,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:19:31,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695721959] [2022-11-03 02:19:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:31,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:19:31,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:19:31,164 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:19:31,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-03 02:19:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:19:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 247 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:19:34,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 247 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:19:36,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:19:36,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695721959] [2022-11-03 02:19:36,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695721959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:36,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [545080041] [2022-11-03 02:19:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:36,285 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:19:36,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:19:36,286 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:19:36,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (136)] Waiting until timeout for monitored process [2022-11-03 02:19:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:39,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:19:39,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 55 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:19:42,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 55 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:19:46,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [545080041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:46,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911936216] [2022-11-03 02:19:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:46,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:46,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:46,282 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:46,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-11-03 02:19:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:47,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:19:47,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 247 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:19:49,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 247 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:19:51,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911936216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:51,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:19:51,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17, 17, 6, 6] total 37 [2022-11-03 02:19:51,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53060323] [2022-11-03 02:19:51,255 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:51,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:19:51,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:19:51,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:19:51,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:19:51,258 INFO L87 Difference]: Start difference. First operand 5761 states and 8060 transitions. Second operand has 37 states, 37 states have (on average 40.21621621621622) internal successors, (1488), 37 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:37,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:37,472 INFO L93 Difference]: Finished difference Result 96716 states and 137175 transitions. [2022-11-03 02:20:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-11-03 02:20:37,474 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 40.21621621621622) internal successors, (1488), 37 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2022-11-03 02:20:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:37,698 INFO L225 Difference]: With dead ends: 96716 [2022-11-03 02:20:37,698 INFO L226 Difference]: Without dead ends: 91244 [2022-11-03 02:20:37,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3462 GetRequests, 3125 SyntacticMatches, 76 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33464 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=10545, Invalid=58361, Unknown=0, NotChecked=0, Total=68906 [2022-11-03 02:20:37,711 INFO L413 NwaCegarLoop]: 1442 mSDtfsCounter, 34305 mSDsluCounter, 26531 mSDsCounter, 0 mSdLazyCounter, 4232 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34305 SdHoareTripleChecker+Valid, 27973 SdHoareTripleChecker+Invalid, 13768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 4232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9304 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:37,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34305 Valid, 27973 Invalid, 13768 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [232 Valid, 4232 Invalid, 0 Unknown, 9304 Unchecked, 8.6s Time] [2022-11-03 02:20:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91244 states. [2022-11-03 02:20:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91244 to 5775. [2022-11-03 02:20:38,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 5774 states have (on average 1.398337374437132) internal successors, (8074), 5774 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 8074 transitions. [2022-11-03 02:20:38,126 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 8074 transitions. Word has length 527 [2022-11-03 02:20:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:38,126 INFO L495 AbstractCegarLoop]: Abstraction has 5775 states and 8074 transitions. [2022-11-03 02:20:38,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 40.21621621621622) internal successors, (1488), 37 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 8074 transitions. [2022-11-03 02:20:38,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-03 02:20:38,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:38,135 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:38,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (135)] Ended with exit code 0 [2022-11-03 02:20:38,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (136)] Ended with exit code 0 [2022-11-03 02:20:38,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:38,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:38,736 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:38,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1874792951, now seen corresponding path program 1 times [2022-11-03 02:20:38,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:20:38,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415562767] [2022-11-03 02:20:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:38,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:20:38,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:20:38,742 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:20:38,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-03 02:20:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:20:40,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:20:41,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 241 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:20:43,778 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:20:43,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415562767] [2022-11-03 02:20:43,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415562767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:43,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1861961004] [2022-11-03 02:20:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:43,780 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:20:43,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:20:43,781 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:20:43,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1be8b476-d56b-4e60-8c4e-63207cc38687/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (139)] Waiting until timeout for monitored process [2022-11-03 02:20:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:47,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 3637 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:20:47,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 131 proven. 57 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 02:20:49,805 INFO L328 TraceCheckSpWp]: Computing backward predicates...