./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.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_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/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_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/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_d6443719-77dd-4e6b-8425-aac1f2052f61/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 ae46bcb394adf58b21d8fc659f42f4a26db695f383dcf5eb3d4a1be07cccf305 --- 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 02:17:35,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:17:35,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:17:35,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:17:35,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:17:35,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:17:35,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:17:35,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:17:35,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:17:35,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:17:35,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:17:35,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:17:35,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:17:35,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:17:35,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:17:35,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:17:35,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:17:35,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:17:35,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:17:35,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:17:35,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:17:35,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:17:35,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:17:35,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:17:35,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:17:35,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:17:35,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:17:35,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:17:35,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:17:35,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:17:35,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:17:35,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:17:35,197 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:17:35,198 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:17:35,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:17:35,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:17:35,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:17:35,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:17:35,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:17:35,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:17:35,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:17:35,208 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:17:35,242 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:17:35,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:17:35,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:17:35,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:17:35,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:17:35,250 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:17:35,250 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:17:35,251 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:17:35,251 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:17:35,251 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:17:35,252 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:17:35,252 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:17:35,253 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:17:35,253 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:17:35,253 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:17:35,253 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:17:35,253 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:17:35,254 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:17:35,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:17:35,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:17:35,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:17:35,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:17:35,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:17:35,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:17:35,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:17:35,257 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:17:35,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:17:35,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:17:35,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:17:35,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:17:35,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:17:35,259 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:17:35,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:17:35,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:17:35,259 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:17:35,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:17:35,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:17:35,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:17:35,261 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_d6443719-77dd-4e6b-8425-aac1f2052f61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae46bcb394adf58b21d8fc659f42f4a26db695f383dcf5eb3d4a1be07cccf305 [2022-11-03 02:17:35,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:17:35,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:17:35,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:17:35,603 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:17:35,603 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:17:35,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c [2022-11-03 02:17:35,703 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/data/a082ce5a2/3e9c45678f9a48f7b460af5610984242/FLAG05b867eae [2022-11-03 02:17:36,324 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:17:36,325 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c [2022-11-03 02:17:36,347 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/data/a082ce5a2/3e9c45678f9a48f7b460af5610984242/FLAG05b867eae [2022-11-03 02:17:36,553 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/data/a082ce5a2/3e9c45678f9a48f7b460af5610984242 [2022-11-03 02:17:36,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:17:36,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:17:36,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:17:36,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:17:36,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:17:36,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:17:36" (1/1) ... [2022-11-03 02:17:36,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2d4777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:36, skipping insertion in model container [2022-11-03 02:17:36,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:17:36" (1/1) ... [2022-11-03 02:17:36,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:17:36,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:17:36,885 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_d6443719-77dd-4e6b-8425-aac1f2052f61/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c[1014,1027] [2022-11-03 02:17:37,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:17:37,249 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:17:37,275 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_d6443719-77dd-4e6b-8425-aac1f2052f61/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c[1014,1027] [2022-11-03 02:17:37,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:17:37,456 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:17:37,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37 WrapperNode [2022-11-03 02:17:37,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:17:37,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:17:37,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:17:37,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:17:37,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37" (1/1) ... [2022-11-03 02:17:37,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37" (1/1) ... [2022-11-03 02:17:37,783 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1784 [2022-11-03 02:17:37,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:17:37,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:17:37,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:17:37,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:17:37,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37" (1/1) ... [2022-11-03 02:17:37,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37" (1/1) ... [2022-11-03 02:17:37,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37" (1/1) ... [2022-11-03 02:17:37,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37" (1/1) ... [2022-11-03 02:17:37,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37" (1/1) ... [2022-11-03 02:17:38,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37" (1/1) ... [2022-11-03 02:17:38,026 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37" (1/1) ... [2022-11-03 02:17:38,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37" (1/1) ... [2022-11-03 02:17:38,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:17:38,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:17:38,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:17:38,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:17:38,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37" (1/1) ... [2022-11-03 02:17:38,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:17:38,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:38,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:17:38,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:17:38,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:17:38,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:17:38,637 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:17:38,640 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:18:08,379 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:18:23,990 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:18:23,990 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:18:23,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:23 BoogieIcfgContainer [2022-11-03 02:18:23,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:18:23,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:18:23,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:18:23,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:18:23,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:17:36" (1/3) ... [2022-11-03 02:18:23,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac2497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:23, skipping insertion in model container [2022-11-03 02:18:23,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:37" (2/3) ... [2022-11-03 02:18:24,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac2497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:24, skipping insertion in model container [2022-11-03 02:18:24,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:23" (3/3) ... [2022-11-03 02:18:24,001 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.bakery.4.prop1-func-interl.c [2022-11-03 02:18:24,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:18:24,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:18:24,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:18:24,067 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;@4d4c7a04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:18:24,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:18:24,072 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 02:18:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:18:24,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:24,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:18:24,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash 12315344, now seen corresponding path program 1 times [2022-11-03 02:18:24,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:24,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686997690] [2022-11-03 02:18:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:24,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:18:24,683 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:18:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:18:24,934 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:18:24,937 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:18:24,939 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:18:24,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:18:24,945 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:18:24,949 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:18:24,991 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:18:25,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:18:25 BoogieIcfgContainer [2022-11-03 02:18:25,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:18:25,016 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:18:25,017 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:18:25,017 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:18:25,018 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:23" (3/4) ... [2022-11-03 02:18:25,022 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:18:25,022 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:18:25,024 INFO L158 Benchmark]: Toolchain (without parser) took 48464.88ms. Allocated memory was 104.9MB in the beginning and 2.6GB in the end (delta: 2.5GB). Free memory was 67.3MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2022-11-03 02:18:25,025 INFO L158 Benchmark]: CDTParser took 13.32ms. Allocated memory was 79.7MB in the beginning and 104.9MB in the end (delta: 25.2MB). Free memory was 53.8MB in the beginning and 86.6MB in the end (delta: -32.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:18:25,026 INFO L158 Benchmark]: CACSL2BoogieTranslator took 894.16ms. Allocated memory is still 104.9MB. Free memory was 67.1MB in the beginning and 69.3MB in the end (delta: -2.2MB). Peak memory consumption was 40.1MB. Max. memory is 16.1GB. [2022-11-03 02:18:25,027 INFO L158 Benchmark]: Boogie Procedure Inliner took 326.04ms. Allocated memory is still 104.9MB. Free memory was 69.3MB in the beginning and 47.9MB in the end (delta: 21.4MB). Peak memory consumption was 44.6MB. Max. memory is 16.1GB. [2022-11-03 02:18:25,032 INFO L158 Benchmark]: Boogie Preprocessor took 289.69ms. Allocated memory was 104.9MB in the beginning and 169.9MB in the end (delta: 65.0MB). Free memory was 47.9MB in the beginning and 105.0MB in the end (delta: -57.2MB). Peak memory consumption was 25.9MB. Max. memory is 16.1GB. [2022-11-03 02:18:25,033 INFO L158 Benchmark]: RCFGBuilder took 45917.96ms. Allocated memory was 169.9MB in the beginning and 2.6GB in the end (delta: 2.5GB). Free memory was 104.4MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2022-11-03 02:18:25,034 INFO L158 Benchmark]: TraceAbstraction took 1019.15ms. Allocated memory is still 2.6GB. Free memory was 1.6GB in the beginning and 1.5GB in the end (delta: 78.6MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. [2022-11-03 02:18:25,034 INFO L158 Benchmark]: Witness Printer took 5.71ms. Allocated memory is still 2.6GB. Free memory is still 1.5GB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:18:25,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 13.32ms. Allocated memory was 79.7MB in the beginning and 104.9MB in the end (delta: 25.2MB). Free memory was 53.8MB in the beginning and 86.6MB in the end (delta: -32.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 894.16ms. Allocated memory is still 104.9MB. Free memory was 67.1MB in the beginning and 69.3MB in the end (delta: -2.2MB). Peak memory consumption was 40.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 326.04ms. Allocated memory is still 104.9MB. Free memory was 69.3MB in the beginning and 47.9MB in the end (delta: 21.4MB). Peak memory consumption was 44.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 289.69ms. Allocated memory was 104.9MB in the beginning and 169.9MB in the end (delta: 65.0MB). Free memory was 47.9MB in the beginning and 105.0MB in the end (delta: -57.2MB). Peak memory consumption was 25.9MB. Max. memory is 16.1GB. * RCFGBuilder took 45917.96ms. Allocated memory was 169.9MB in the beginning and 2.6GB in the end (delta: 2.5GB). Free memory was 104.4MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * TraceAbstraction took 1019.15ms. Allocated memory is still 2.6GB. Free memory was 1.6GB in the beginning and 1.5GB in the end (delta: 78.6MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. * Witness Printer took 5.71ms. Allocated memory is still 2.6GB. Free memory is still 1.5GB. There was no memory consumed. 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 227, overapproximation of bitwiseAnd at line 162. 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_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_30 = 0; [L39] const SORT_4 var_63 = 1; [L40] const SORT_4 var_64 = 0; [L41] const SORT_2 var_74 = 0; [L42] const SORT_2 var_76 = 1; [L43] const SORT_3 var_91 = 0; [L44] const SORT_4 var_227 = 3; [L45] const SORT_2 var_239 = 3; [L46] const SORT_4 var_241 = 6; [L47] const SORT_4 var_343 = 2; [L49] SORT_1 input_73; [L50] SORT_1 input_75; [L51] SORT_1 input_80; [L52] SORT_1 input_81; [L53] SORT_1 input_85; [L54] SORT_1 input_86; [L55] SORT_1 input_90; [L56] SORT_1 input_98; [L57] SORT_1 input_105; [L58] SORT_1 input_112; [L59] SORT_1 input_116; [L60] SORT_1 input_117; [L61] SORT_1 input_131; [L62] SORT_1 input_135; [L63] SORT_1 input_136; [L64] SORT_1 input_150; [L65] SORT_1 input_154; [L66] SORT_1 input_155; [L67] SORT_1 input_176; [L68] SORT_1 input_179; [L69] SORT_1 input_195; [L70] SORT_1 input_198; [L71] SORT_1 input_214; [L72] SORT_1 input_217; [L74] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L75] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L76] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L77] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L78] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L79] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L80] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L81] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L82] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L83] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L84] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L85] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L86] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L88] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L89] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L90] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L91] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L92] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L93] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L94] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L95] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L96] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L97] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L98] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L99] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L100] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L101] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L103] SORT_2 init_7_arg_1 = var_5; [L104] state_6 = init_7_arg_1 [L105] SORT_2 init_9_arg_1 = var_5; [L106] state_8 = init_9_arg_1 [L107] SORT_2 init_11_arg_1 = var_5; [L108] state_10 = init_11_arg_1 [L109] SORT_2 init_13_arg_1 = var_5; [L110] state_12 = init_13_arg_1 [L111] SORT_2 init_15_arg_1 = var_5; [L112] state_14 = init_15_arg_1 [L113] SORT_2 init_17_arg_1 = var_5; [L114] state_16 = init_17_arg_1 [L115] SORT_2 init_19_arg_1 = var_5; [L116] state_18 = init_19_arg_1 [L117] SORT_2 init_21_arg_1 = var_5; [L118] state_20 = init_21_arg_1 [L119] SORT_2 init_23_arg_1 = var_5; [L120] state_22 = init_23_arg_1 [L121] SORT_2 init_25_arg_1 = var_5; [L122] state_24 = init_25_arg_1 [L123] SORT_2 init_27_arg_1 = var_5; [L124] state_26 = init_27_arg_1 [L125] SORT_2 init_29_arg_1 = var_5; [L126] state_28 = init_29_arg_1 [L127] SORT_1 init_32_arg_1 = var_30; [L128] state_31 = init_32_arg_1 [L129] SORT_1 init_34_arg_1 = var_30; [L130] state_33 = init_34_arg_1 [L131] SORT_1 init_36_arg_1 = var_30; [L132] state_35 = init_36_arg_1 [L133] SORT_1 init_38_arg_1 = var_30; [L134] state_37 = init_38_arg_1 [L135] SORT_1 init_40_arg_1 = var_30; [L136] state_39 = init_40_arg_1 [L137] SORT_1 init_42_arg_1 = var_30; [L138] state_41 = init_42_arg_1 [L139] SORT_1 init_44_arg_1 = var_30; [L140] state_43 = init_44_arg_1 [L141] SORT_1 init_46_arg_1 = var_30; [L142] state_45 = init_46_arg_1 [L143] SORT_1 init_48_arg_1 = var_30; [L144] state_47 = init_48_arg_1 [L145] SORT_1 init_50_arg_1 = var_30; [L146] state_49 = init_50_arg_1 [L147] SORT_1 init_52_arg_1 = var_30; [L148] state_51 = init_52_arg_1 [L149] SORT_1 init_54_arg_1 = var_30; [L150] state_53 = init_54_arg_1 [L151] SORT_1 init_56_arg_1 = var_30; [L152] state_55 = init_56_arg_1 [L153] SORT_1 init_58_arg_1 = var_30; [L154] state_57 = init_58_arg_1 [L155] SORT_1 init_60_arg_1 = var_30; [L156] state_59 = init_60_arg_1 [L157] SORT_1 init_62_arg_1 = var_30; [L158] state_61 = init_62_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_59=0, state_6=0, state_61=0, state_8=0, var_227=3, var_239=3, var_241=6, var_30=0, var_343=2, var_5=0, var_63=1, var_64=0, var_74=0, var_76=1, var_91=0] [L161] input_73 = __VERIFIER_nondet_uchar() [L162] input_73 = input_73 & mask_SORT_1 [L163] input_75 = __VERIFIER_nondet_uchar() [L164] input_75 = input_75 & mask_SORT_1 [L165] input_80 = __VERIFIER_nondet_uchar() [L166] input_80 = input_80 & mask_SORT_1 [L167] input_81 = __VERIFIER_nondet_uchar() [L168] input_81 = input_81 & mask_SORT_1 [L169] input_85 = __VERIFIER_nondet_uchar() [L170] input_85 = input_85 & mask_SORT_1 [L171] input_86 = __VERIFIER_nondet_uchar() [L172] input_86 = input_86 & mask_SORT_1 [L173] input_90 = __VERIFIER_nondet_uchar() [L174] input_90 = input_90 & mask_SORT_1 [L175] input_98 = __VERIFIER_nondet_uchar() [L176] input_98 = input_98 & mask_SORT_1 [L177] input_105 = __VERIFIER_nondet_uchar() [L178] input_105 = input_105 & mask_SORT_1 [L179] input_112 = __VERIFIER_nondet_uchar() [L180] input_112 = input_112 & mask_SORT_1 [L181] input_116 = __VERIFIER_nondet_uchar() [L182] input_116 = input_116 & mask_SORT_1 [L183] input_117 = __VERIFIER_nondet_uchar() [L184] input_117 = input_117 & mask_SORT_1 [L185] input_131 = __VERIFIER_nondet_uchar() [L186] input_131 = input_131 & mask_SORT_1 [L187] input_135 = __VERIFIER_nondet_uchar() [L188] input_135 = input_135 & mask_SORT_1 [L189] input_136 = __VERIFIER_nondet_uchar() [L190] input_136 = input_136 & mask_SORT_1 [L191] input_150 = __VERIFIER_nondet_uchar() [L192] input_150 = input_150 & mask_SORT_1 [L193] input_154 = __VERIFIER_nondet_uchar() [L194] input_154 = input_154 & mask_SORT_1 [L195] input_155 = __VERIFIER_nondet_uchar() [L196] input_155 = input_155 & mask_SORT_1 [L197] input_176 = __VERIFIER_nondet_uchar() [L198] input_179 = __VERIFIER_nondet_uchar() [L199] input_195 = __VERIFIER_nondet_uchar() [L200] input_198 = __VERIFIER_nondet_uchar() [L201] input_214 = __VERIFIER_nondet_uchar() [L202] input_217 = __VERIFIER_nondet_uchar() [L205] SORT_1 var_65_arg_0 = state_39; [L206] SORT_4 var_65_arg_1 = var_63; [L207] SORT_4 var_65_arg_2 = var_64; [L208] EXPR var_65_arg_0 ? var_65_arg_1 : var_65_arg_2 [L208] SORT_4 var_65 = var_65_arg_0 ? var_65_arg_1 : var_65_arg_2; [L209] SORT_1 var_66_arg_0 = state_49; [L210] SORT_4 var_66_arg_1 = var_63; [L211] SORT_4 var_66_arg_2 = var_64; [L212] EXPR var_66_arg_0 ? var_66_arg_1 : var_66_arg_2 [L212] SORT_4 var_66 = var_66_arg_0 ? var_66_arg_1 : var_66_arg_2; [L213] SORT_4 var_67_arg_0 = var_65; [L214] SORT_4 var_67_arg_1 = var_66; [L215] SORT_4 var_67 = var_67_arg_0 + var_67_arg_1; [L216] SORT_1 var_68_arg_0 = state_59; [L217] SORT_4 var_68_arg_1 = var_63; [L218] SORT_4 var_68_arg_2 = var_64; [L219] EXPR var_68_arg_0 ? var_68_arg_1 : var_68_arg_2 [L219] SORT_4 var_68 = var_68_arg_0 ? var_68_arg_1 : var_68_arg_2; [L220] SORT_4 var_69_arg_0 = var_67; [L221] SORT_4 var_69_arg_1 = var_68; [L222] SORT_4 var_69 = var_69_arg_0 + var_69_arg_1; [L223] var_69 = var_69 & mask_SORT_4 [L224] SORT_4 var_70_arg_0 = var_69; [L225] SORT_4 var_70_arg_1 = var_63; [L226] SORT_1 var_70 = var_70_arg_0 <= var_70_arg_1; [L227] SORT_1 var_71_arg_0 = ~state_61; [L228] var_71_arg_0 = var_71_arg_0 & mask_SORT_1 [L229] SORT_1 var_71_arg_1 = ~var_70; [L230] var_71_arg_1 = var_71_arg_1 & mask_SORT_1 [L231] SORT_1 var_71 = var_71_arg_0 & var_71_arg_1; [L232] var_71 = var_71 & mask_SORT_1 [L233] SORT_1 bad_72_arg_0 = var_71; [L234] CALL __VERIFIER_assert(!(bad_72_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: 0.9s, 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 02:18:25,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/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_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/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_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/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_d6443719-77dd-4e6b-8425-aac1f2052f61/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 ae46bcb394adf58b21d8fc659f42f4a26db695f383dcf5eb3d4a1be07cccf305 --- 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 02:18:27,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:18:27,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:18:27,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:18:27,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:18:27,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:18:27,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:18:27,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:18:27,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:18:27,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:18:27,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:18:27,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:18:27,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:18:27,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:18:27,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:18:27,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:18:27,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:18:27,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:18:27,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:18:27,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:18:27,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:18:27,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:18:27,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:18:27,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:18:27,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:18:27,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:18:27,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:18:27,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:18:27,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:18:27,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:18:27,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:18:27,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:18:27,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:18:27,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:18:27,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:18:27,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:18:27,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:18:27,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:18:27,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:18:27,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:18:27,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:18:27,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:18:27,653 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:18:27,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:18:27,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:18:27,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:18:27,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:18:27,659 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:18:27,659 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:18:27,660 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:18:27,660 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:18:27,660 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:18:27,660 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:18:27,660 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:18:27,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:18:27,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:18:27,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:18:27,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:18:27,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:18:27,662 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:18:27,662 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:18:27,662 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:18:27,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:18:27,663 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:18:27,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:18:27,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:18:27,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:18:27,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:18:27,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:18:27,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:18:27,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:18:27,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:18:27,664 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:18:27,664 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:18:27,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:18:27,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:18:27,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:18:27,665 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_d6443719-77dd-4e6b-8425-aac1f2052f61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae46bcb394adf58b21d8fc659f42f4a26db695f383dcf5eb3d4a1be07cccf305 [2022-11-03 02:18:28,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:18:28,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:18:28,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:18:28,029 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:18:28,030 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:18:28,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c [2022-11-03 02:18:28,095 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/data/92dcbf94b/94ea28395cdb409ba702f1e53263f14c/FLAGbf3d9b7eb [2022-11-03 02:18:28,871 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:18:28,871 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c [2022-11-03 02:18:28,889 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/data/92dcbf94b/94ea28395cdb409ba702f1e53263f14c/FLAGbf3d9b7eb [2022-11-03 02:18:29,019 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/data/92dcbf94b/94ea28395cdb409ba702f1e53263f14c [2022-11-03 02:18:29,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:18:29,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:18:29,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:18:29,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:18:29,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:18:29,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:29,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@218ec30d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29, skipping insertion in model container [2022-11-03 02:18:29,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:29,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:18:29,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:18:29,289 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_d6443719-77dd-4e6b-8425-aac1f2052f61/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c[1014,1027] [2022-11-03 02:18:29,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:18:29,598 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:18:29,617 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_d6443719-77dd-4e6b-8425-aac1f2052f61/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.4.prop1-func-interl.c[1014,1027] [2022-11-03 02:18:29,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:18:29,855 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:18:29,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29 WrapperNode [2022-11-03 02:18:29,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:18:29,857 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:18:29,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:18:29,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:18:29,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:29,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:30,042 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1784 [2022-11-03 02:18:30,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:18:30,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:18:30,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:18:30,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:18:30,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:30,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:30,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:30,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:30,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:30,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:30,119 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:30,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:30,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:18:30,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:18:30,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:18:30,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:18:30,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29" (1/1) ... [2022-11-03 02:18:30,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:18:30,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:30,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:18:30,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:18:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:18:30,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:18:30,759 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:18:30,761 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:18:32,372 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:18:32,383 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:18:32,384 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:18:32,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:32 BoogieIcfgContainer [2022-11-03 02:18:32,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:18:32,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:18:32,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:18:32,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:18:32,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:18:29" (1/3) ... [2022-11-03 02:18:32,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1edca065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:32, skipping insertion in model container [2022-11-03 02:18:32,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:29" (2/3) ... [2022-11-03 02:18:32,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1edca065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:32, skipping insertion in model container [2022-11-03 02:18:32,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:32" (3/3) ... [2022-11-03 02:18:32,397 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.bakery.4.prop1-func-interl.c [2022-11-03 02:18:32,420 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:18:32,420 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:18:32,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:18:32,495 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;@2aba5ecc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:18:32,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:18:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 105 states have (on average 1.4952380952380953) internal successors, (157), 106 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:32,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:18:32,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:32,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:32,508 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:32,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1473645707, now seen corresponding path program 1 times [2022-11-03 02:18:32,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:32,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978035508] [2022-11-03 02:18:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:32,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:32,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:32,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:32,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:18:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:32,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:18:32,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:33,032 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 02:18:33,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:33,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:33,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978035508] [2022-11-03 02:18:33,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978035508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:33,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:33,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:33,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946528360] [2022-11-03 02:18:33,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:33,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:33,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:33,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:33,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:33,070 INFO L87 Difference]: Start difference. First operand has 107 states, 105 states have (on average 1.4952380952380953) internal successors, (157), 106 states have internal predecessors, (157), 0 states have call successors, (0), 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 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:33,334 INFO L93 Difference]: Finished difference Result 409 states and 611 transitions. [2022-11-03 02:18:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:33,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 02:18:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:33,349 INFO L225 Difference]: With dead ends: 409 [2022-11-03 02:18:33,349 INFO L226 Difference]: Without dead ends: 304 [2022-11-03 02:18:33,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 02:18:33,356 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 439 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:33,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 583 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:18:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-03 02:18:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 105. [2022-11-03 02:18:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 153 transitions. [2022-11-03 02:18:33,398 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 153 transitions. Word has length 11 [2022-11-03 02:18:33,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:33,399 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 153 transitions. [2022-11-03 02:18:33,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:33,399 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 153 transitions. [2022-11-03 02:18:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:18:33,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:33,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:33,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 02:18:33,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:33,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:33,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2011974963, now seen corresponding path program 1 times [2022-11-03 02:18:33,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:33,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085449897] [2022-11-03 02:18:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:33,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:33,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:33,615 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:33,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:18:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:18:33,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:34,008 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 02:18:34,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:34,009 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:34,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085449897] [2022-11-03 02:18:34,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085449897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:34,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:34,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:34,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070391783] [2022-11-03 02:18:34,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:34,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:34,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:34,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:34,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:34,016 INFO L87 Difference]: Start difference. First operand 105 states and 153 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:34,249 INFO L93 Difference]: Finished difference Result 405 states and 595 transitions. [2022-11-03 02:18:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:34,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 02:18:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:34,254 INFO L225 Difference]: With dead ends: 405 [2022-11-03 02:18:34,254 INFO L226 Difference]: Without dead ends: 304 [2022-11-03 02:18:34,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 02:18:34,256 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 433 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:34,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 582 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:18:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-03 02:18:34,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 107. [2022-11-03 02:18:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.4622641509433962) internal successors, (155), 106 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 155 transitions. [2022-11-03 02:18:34,282 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 155 transitions. Word has length 11 [2022-11-03 02:18:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:34,282 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 155 transitions. [2022-11-03 02:18:34,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 155 transitions. [2022-11-03 02:18:34,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:18:34,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:34,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:34,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:34,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:34,497 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2069233265, now seen corresponding path program 1 times [2022-11-03 02:18:34,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:34,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854669927] [2022-11-03 02:18:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:34,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:34,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:34,506 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:34,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:18:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:18:34,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:34,872 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 02:18:34,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:34,873 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:34,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854669927] [2022-11-03 02:18:34,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854669927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:34,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:34,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:34,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624141810] [2022-11-03 02:18:34,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:34,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:34,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:34,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:34,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:34,875 INFO L87 Difference]: Start difference. First operand 107 states and 155 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:35,022 INFO L93 Difference]: Finished difference Result 405 states and 594 transitions. [2022-11-03 02:18:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 02:18:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:35,026 INFO L225 Difference]: With dead ends: 405 [2022-11-03 02:18:35,026 INFO L226 Difference]: Without dead ends: 304 [2022-11-03 02:18:35,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 02:18:35,028 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 427 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:35,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 584 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-03 02:18:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 109. [2022-11-03 02:18:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4537037037037037) internal successors, (157), 108 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-11-03 02:18:35,037 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 11 [2022-11-03 02:18:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:35,037 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-11-03 02:18:35,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-11-03 02:18:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:18:35,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:35,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:35,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:35,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:35,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2069292847, now seen corresponding path program 1 times [2022-11-03 02:18:35,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:35,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081877168] [2022-11-03 02:18:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:35,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:35,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:35,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:35,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:18:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:35,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:18:35,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:35,903 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 02:18:35,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:35,903 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:35,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081877168] [2022-11-03 02:18:35,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081877168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:35,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:35,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:18:35,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274564953] [2022-11-03 02:18:35,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:35,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:18:35,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:18:35,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:18:35,909 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:37,045 INFO L93 Difference]: Finished difference Result 429 states and 625 transitions. [2022-11-03 02:18:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:18:37,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-03 02:18:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:37,047 INFO L225 Difference]: With dead ends: 429 [2022-11-03 02:18:37,047 INFO L226 Difference]: Without dead ends: 427 [2022-11-03 02:18:37,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:18:37,049 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1014 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:37,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1014 Valid, 1414 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:18:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-11-03 02:18:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 115. [2022-11-03 02:18:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4473684210526316) internal successors, (165), 114 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 165 transitions. [2022-11-03 02:18:37,060 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 165 transitions. Word has length 11 [2022-11-03 02:18:37,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:37,060 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 165 transitions. [2022-11-03 02:18:37,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:37,061 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 165 transitions. [2022-11-03 02:18:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:18:37,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:37,064 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:37,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:37,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:37,275 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:37,276 INFO L85 PathProgramCache]: Analyzing trace with hash 877884095, now seen corresponding path program 1 times [2022-11-03 02:18:37,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:37,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967082848] [2022-11-03 02:18:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:37,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:37,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:37,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:37,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:18:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:38,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:18:38,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:38,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:38,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967082848] [2022-11-03 02:18:38,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967082848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:38,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:38,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:18:38,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026111160] [2022-11-03 02:18:38,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:38,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:18:38,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:38,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:18:38,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:18:38,384 INFO L87 Difference]: Start difference. First operand 115 states and 165 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:38,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:38,673 INFO L93 Difference]: Finished difference Result 422 states and 616 transitions. [2022-11-03 02:18:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:18:38,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-11-03 02:18:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:38,675 INFO L225 Difference]: With dead ends: 422 [2022-11-03 02:18:38,675 INFO L226 Difference]: Without dead ends: 315 [2022-11-03 02:18:38,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:18:38,677 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 379 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:38,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 1197 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-03 02:18:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-03 02:18:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 139. [2022-11-03 02:18:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.4420289855072463) internal successors, (199), 138 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 199 transitions. [2022-11-03 02:18:38,684 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 199 transitions. Word has length 110 [2022-11-03 02:18:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:38,685 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 199 transitions. [2022-11-03 02:18:38,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 199 transitions. [2022-11-03 02:18:38,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:18:38,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:38,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:38,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:38,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:38,902 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1118123841, now seen corresponding path program 1 times [2022-11-03 02:18:38,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:38,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860935075] [2022-11-03 02:18:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:38,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:38,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:38,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:38,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:18:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:39,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:18:39,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:39,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:39,977 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:39,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860935075] [2022-11-03 02:18:39,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860935075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:39,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:39,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:39,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413092448] [2022-11-03 02:18:39,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:39,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:39,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:39,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:39,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:39,980 INFO L87 Difference]: Start difference. First operand 139 states and 199 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:40,162 INFO L93 Difference]: Finished difference Result 431 states and 629 transitions. [2022-11-03 02:18:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:40,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-11-03 02:18:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:40,166 INFO L225 Difference]: With dead ends: 431 [2022-11-03 02:18:40,166 INFO L226 Difference]: Without dead ends: 324 [2022-11-03 02:18:40,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 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 02:18:40,167 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 329 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:40,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 564 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:18:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-03 02:18:40,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 163. [2022-11-03 02:18:40,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.4444444444444444) internal successors, (234), 162 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 234 transitions. [2022-11-03 02:18:40,175 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 234 transitions. Word has length 110 [2022-11-03 02:18:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:40,175 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 234 transitions. [2022-11-03 02:18:40,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 234 transitions. [2022-11-03 02:18:40,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:18:40,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:40,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:40,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:40,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:40,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:40,379 INFO L85 PathProgramCache]: Analyzing trace with hash -568055997, now seen corresponding path program 1 times [2022-11-03 02:18:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:40,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934160130] [2022-11-03 02:18:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:40,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:40,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:40,382 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:40,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:18:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:41,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:18:41,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:41,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:41,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:41,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934160130] [2022-11-03 02:18:41,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934160130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:41,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:41,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:18:41,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604797540] [2022-11-03 02:18:41,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:41,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:18:41,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:18:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:18:41,521 INFO L87 Difference]: Start difference. First operand 163 states and 234 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:41,658 INFO L93 Difference]: Finished difference Result 318 states and 461 transitions. [2022-11-03 02:18:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:18:41,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-11-03 02:18:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:41,661 INFO L225 Difference]: With dead ends: 318 [2022-11-03 02:18:41,661 INFO L226 Difference]: Without dead ends: 211 [2022-11-03 02:18:41,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:41,662 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 78 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:41,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 715 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-03 02:18:41,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-03 02:18:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-11-03 02:18:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.4428571428571428) internal successors, (303), 210 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:41,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 303 transitions. [2022-11-03 02:18:41,669 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 303 transitions. Word has length 110 [2022-11-03 02:18:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:41,670 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 303 transitions. [2022-11-03 02:18:41,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:41,670 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 303 transitions. [2022-11-03 02:18:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:18:41,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:41,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:41,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:41,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:41,895 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:41,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1828973247, now seen corresponding path program 1 times [2022-11-03 02:18:41,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:41,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832224513] [2022-11-03 02:18:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:41,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:41,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:41,899 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:41,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:18:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:42,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:18:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:42,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:42,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832224513] [2022-11-03 02:18:42,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832224513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:42,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:42,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:42,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197009367] [2022-11-03 02:18:42,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:42,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:42,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:42,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:42,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:42,958 INFO L87 Difference]: Start difference. First operand 211 states and 303 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:43,105 INFO L93 Difference]: Finished difference Result 479 states and 697 transitions. [2022-11-03 02:18:43,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:43,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-11-03 02:18:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:43,109 INFO L225 Difference]: With dead ends: 479 [2022-11-03 02:18:43,109 INFO L226 Difference]: Without dead ends: 372 [2022-11-03 02:18:43,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 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 02:18:43,111 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 283 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:43,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 563 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-11-03 02:18:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 229. [2022-11-03 02:18:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.4429824561403508) internal successors, (329), 228 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 329 transitions. [2022-11-03 02:18:43,118 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 329 transitions. Word has length 110 [2022-11-03 02:18:43,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:43,119 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 329 transitions. [2022-11-03 02:18:43,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 329 transitions. [2022-11-03 02:18:43,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:18:43,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:43,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:43,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:43,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:43,346 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2112905667, now seen corresponding path program 1 times [2022-11-03 02:18:43,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:43,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233172198] [2022-11-03 02:18:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:43,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:43,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:43,349 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:43,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:18:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:44,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:18:44,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:44,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:44,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:44,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233172198] [2022-11-03 02:18:44,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233172198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:44,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:44,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:18:44,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566695866] [2022-11-03 02:18:44,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:44,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:18:44,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:44,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:18:44,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:18:44,489 INFO L87 Difference]: Start difference. First operand 229 states and 329 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:44,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:44,623 INFO L93 Difference]: Finished difference Result 442 states and 639 transitions. [2022-11-03 02:18:44,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:18:44,624 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-11-03 02:18:44,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:44,626 INFO L225 Difference]: With dead ends: 442 [2022-11-03 02:18:44,626 INFO L226 Difference]: Without dead ends: 335 [2022-11-03 02:18:44,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:44,627 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 83 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:44,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 795 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-11-03 02:18:44,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-03 02:18:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-11-03 02:18:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.4401197604790419) internal successors, (481), 334 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 481 transitions. [2022-11-03 02:18:44,636 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 481 transitions. Word has length 110 [2022-11-03 02:18:44,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:44,636 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 481 transitions. [2022-11-03 02:18:44,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:44,637 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 481 transitions. [2022-11-03 02:18:44,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:18:44,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:44,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:44,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:44,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:44,867 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash -336694463, now seen corresponding path program 1 times [2022-11-03 02:18:44,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:44,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556173381] [2022-11-03 02:18:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:44,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:44,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:44,871 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:44,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:18:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:45,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:18:45,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:45,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:45,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:45,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556173381] [2022-11-03 02:18:45,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556173381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:45,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:45,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:18:45,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721874895] [2022-11-03 02:18:45,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:45,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:18:45,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:45,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:18:45,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:18:45,853 INFO L87 Difference]: Start difference. First operand 335 states and 481 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:46,113 INFO L93 Difference]: Finished difference Result 702 states and 1014 transitions. [2022-11-03 02:18:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:18:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-11-03 02:18:46,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:46,115 INFO L225 Difference]: With dead ends: 702 [2022-11-03 02:18:46,116 INFO L226 Difference]: Without dead ends: 595 [2022-11-03 02:18:46,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:18:46,117 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 306 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:46,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1390 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-11-03 02:18:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-11-03 02:18:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 465. [2022-11-03 02:18:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.4353448275862069) internal successors, (666), 464 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 666 transitions. [2022-11-03 02:18:46,126 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 666 transitions. Word has length 110 [2022-11-03 02:18:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:46,127 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 666 transitions. [2022-11-03 02:18:46,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 666 transitions. [2022-11-03 02:18:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:18:46,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:46,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:46,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:46,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:46,351 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:46,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:46,352 INFO L85 PathProgramCache]: Analyzing trace with hash -409081021, now seen corresponding path program 1 times [2022-11-03 02:18:46,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:46,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546073038] [2022-11-03 02:18:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:46,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:46,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:46,354 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:46,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:18:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:47,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:18:47,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:47,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:47,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:47,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546073038] [2022-11-03 02:18:47,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546073038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:47,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:47,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:47,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42645975] [2022-11-03 02:18:47,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:47,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:47,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:47,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:47,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:47,465 INFO L87 Difference]: Start difference. First operand 465 states and 666 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:47,618 INFO L93 Difference]: Finished difference Result 715 states and 1033 transitions. [2022-11-03 02:18:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:47,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-11-03 02:18:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:47,623 INFO L225 Difference]: With dead ends: 715 [2022-11-03 02:18:47,623 INFO L226 Difference]: Without dead ends: 608 [2022-11-03 02:18:47,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 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 02:18:47,624 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 237 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:47,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 562 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-03 02:18:47,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 483. [2022-11-03 02:18:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.4356846473029046) internal successors, (692), 482 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 692 transitions. [2022-11-03 02:18:47,636 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 692 transitions. Word has length 110 [2022-11-03 02:18:47,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:47,637 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 692 transitions. [2022-11-03 02:18:47,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:47,637 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 692 transitions. [2022-11-03 02:18:47,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:18:47,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:47,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:47,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-03 02:18:47,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:47,865 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:47,866 INFO L85 PathProgramCache]: Analyzing trace with hash 977122373, now seen corresponding path program 1 times [2022-11-03 02:18:47,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:47,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419244914] [2022-11-03 02:18:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:47,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:47,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:47,869 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:47,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:18:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:18:48,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:49,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:49,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:49,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419244914] [2022-11-03 02:18:49,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419244914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:49,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:49,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:18:49,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930078158] [2022-11-03 02:18:49,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:49,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:18:49,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:18:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:18:49,026 INFO L87 Difference]: Start difference. First operand 483 states and 692 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:49,169 INFO L93 Difference]: Finished difference Result 610 states and 877 transitions. [2022-11-03 02:18:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:18:49,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-11-03 02:18:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:49,173 INFO L225 Difference]: With dead ends: 610 [2022-11-03 02:18:49,173 INFO L226 Difference]: Without dead ends: 503 [2022-11-03 02:18:49,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:49,175 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 129 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:49,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 718 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-03 02:18:49,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-11-03 02:18:49,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2022-11-03 02:18:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.4322709163346614) internal successors, (719), 502 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 719 transitions. [2022-11-03 02:18:49,192 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 719 transitions. Word has length 110 [2022-11-03 02:18:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:49,193 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 719 transitions. [2022-11-03 02:18:49,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 719 transitions. [2022-11-03 02:18:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:18:49,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:49,195 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:49,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:49,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:49,423 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:49,423 INFO L85 PathProgramCache]: Analyzing trace with hash 836573763, now seen corresponding path program 1 times [2022-11-03 02:18:49,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:49,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15124470] [2022-11-03 02:18:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:49,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:49,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:49,425 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:49,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:18:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:50,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:18:50,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:50,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:50,342 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:50,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15124470] [2022-11-03 02:18:50,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15124470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:50,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:50,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:50,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406012685] [2022-11-03 02:18:50,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:50,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:50,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:50,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:50,344 INFO L87 Difference]: Start difference. First operand 503 states and 719 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:50,568 INFO L93 Difference]: Finished difference Result 786 states and 1132 transitions. [2022-11-03 02:18:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:50,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-11-03 02:18:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:50,571 INFO L225 Difference]: With dead ends: 786 [2022-11-03 02:18:50,572 INFO L226 Difference]: Without dead ends: 679 [2022-11-03 02:18:50,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 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 02:18:50,573 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 426 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:50,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 785 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:18:50,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-11-03 02:18:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 511. [2022-11-03 02:18:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.4313725490196079) internal successors, (730), 510 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 02:18:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 730 transitions. [2022-11-03 02:18:50,586 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 730 transitions. Word has length 110 [2022-11-03 02:18:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:50,587 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 730 transitions. [2022-11-03 02:18:50,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 730 transitions. [2022-11-03 02:18:50,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:18:50,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:50,589 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:50,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:50,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:50,804 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:50,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1259275589, now seen corresponding path program 1 times [2022-11-03 02:18:50,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:50,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753492905] [2022-11-03 02:18:50,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:50,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:50,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:50,807 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:50,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:18:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:51,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:18:51,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:51,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:51,789 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:51,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753492905] [2022-11-03 02:18:51,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753492905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:51,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:51,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:51,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807384255] [2022-11-03 02:18:51,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:51,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:51,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:51,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:51,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:51,791 INFO L87 Difference]: Start difference. First operand 511 states and 730 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:51,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:51,976 INFO L93 Difference]: Finished difference Result 804 states and 1158 transitions. [2022-11-03 02:18:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:51,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-11-03 02:18:51,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:51,979 INFO L225 Difference]: With dead ends: 804 [2022-11-03 02:18:51,979 INFO L226 Difference]: Without dead ends: 697 [2022-11-03 02:18:51,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 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 02:18:51,981 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 442 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:51,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 804 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:51,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-11-03 02:18:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 515. [2022-11-03 02:18:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.4299610894941635) internal successors, (735), 514 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 02:18:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 735 transitions. [2022-11-03 02:18:51,996 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 735 transitions. Word has length 110 [2022-11-03 02:18:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:51,997 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 735 transitions. [2022-11-03 02:18:51,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 735 transitions. [2022-11-03 02:18:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:18:51,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:51,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:52,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:52,226 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:52,227 INFO L85 PathProgramCache]: Analyzing trace with hash -329072313, now seen corresponding path program 1 times [2022-11-03 02:18:52,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:52,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368782563] [2022-11-03 02:18:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:52,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:52,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:52,229 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:52,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:18:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:52,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:18:52,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:53,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:53,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:53,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368782563] [2022-11-03 02:18:53,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368782563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:53,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:53,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:53,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405201103] [2022-11-03 02:18:53,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:53,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:53,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:53,261 INFO L87 Difference]: Start difference. First operand 515 states and 735 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:53,458 INFO L93 Difference]: Finished difference Result 822 states and 1184 transitions. [2022-11-03 02:18:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:53,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-11-03 02:18:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:53,462 INFO L225 Difference]: With dead ends: 822 [2022-11-03 02:18:53,462 INFO L226 Difference]: Without dead ends: 715 [2022-11-03 02:18:53,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 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 02:18:53,466 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 458 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:53,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 823 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-11-03 02:18:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 519. [2022-11-03 02:18:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.4285714285714286) internal successors, (740), 518 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 740 transitions. [2022-11-03 02:18:53,480 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 740 transitions. Word has length 110 [2022-11-03 02:18:53,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:53,480 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 740 transitions. [2022-11-03 02:18:53,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:53,481 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 740 transitions. [2022-11-03 02:18:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:18:53,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:53,483 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:53,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:53,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:53,705 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:53,705 INFO L85 PathProgramCache]: Analyzing trace with hash -915878327, now seen corresponding path program 1 times [2022-11-03 02:18:53,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:53,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653987918] [2022-11-03 02:18:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:53,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:53,708 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:53,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:18:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:54,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:18:54,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:55,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:55,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:55,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653987918] [2022-11-03 02:18:55,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653987918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:55,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [950853613] [2022-11-03 02:18:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:55,824 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:18:55,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:18:55,830 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:18:55,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:18:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:57,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:18:57,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:57,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:58,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [950853613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:58,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992338081] [2022-11-03 02:18:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:58,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:58,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:58,135 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:58,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:18:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:58,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:18:58,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:59,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:00,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992338081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:00,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:19:00,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 02:19:00,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082807243] [2022-11-03 02:19:00,432 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:00,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:19:00,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:19:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:19:00,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:19:00,435 INFO L87 Difference]: Start difference. First operand 519 states and 740 transitions. Second operand has 28 states, 28 states have (on average 14.964285714285714) internal successors, (419), 28 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:01,049 INFO L93 Difference]: Finished difference Result 982 states and 1400 transitions. [2022-11-03 02:19:01,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:19:01,050 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 14.964285714285714) internal successors, (419), 28 states have internal predecessors, (419), 0 states have call successors, (0), 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 110 [2022-11-03 02:19:01,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:01,052 INFO L225 Difference]: With dead ends: 982 [2022-11-03 02:19:01,053 INFO L226 Difference]: Without dead ends: 875 [2022-11-03 02:19:01,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 628 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:19:01,060 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 664 mSDsluCounter, 2046 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:01,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 2189 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-11-03 02:19:01,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-11-03 02:19:01,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 872. [2022-11-03 02:19:01,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 1.4213547646383466) internal successors, (1238), 871 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1238 transitions. [2022-11-03 02:19:01,079 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1238 transitions. Word has length 110 [2022-11-03 02:19:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:01,081 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1238 transitions. [2022-11-03 02:19:01,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 14.964285714285714) internal successors, (419), 28 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1238 transitions. [2022-11-03 02:19:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:19:01,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:01,084 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:19:01,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:01,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:01,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-11-03 02:19:01,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:19:01,699 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:01,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:01,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1725224953, now seen corresponding path program 1 times [2022-11-03 02:19:01,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:19:01,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335420447] [2022-11-03 02:19:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:01,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:19:01,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:19:01,701 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:19:01,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:19:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:02,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:19:02,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:03,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:03,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:19:03,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335420447] [2022-11-03 02:19:03,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335420447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:03,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1984753939] [2022-11-03 02:19:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:03,807 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:19:03,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:19:03,808 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:19:03,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:19:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:19:05,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:05,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:06,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1984753939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:06,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705381606] [2022-11-03 02:19:06,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:06,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:06,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:06,130 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:06,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:19:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:06,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:19:06,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:07,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:07,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705381606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:07,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:19:07,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:19:07,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440999043] [2022-11-03 02:19:07,710 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:07,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:19:07,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:19:07,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:19:07,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:19:07,712 INFO L87 Difference]: Start difference. First operand 872 states and 1238 transitions. Second operand has 16 states, 16 states have (on average 13.4375) internal successors, (215), 16 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:07,840 INFO L93 Difference]: Finished difference Result 1393 states and 1982 transitions. [2022-11-03 02:19:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:19:07,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.4375) internal successors, (215), 16 states have internal predecessors, (215), 0 states have call successors, (0), 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 110 [2022-11-03 02:19:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:07,845 INFO L225 Difference]: With dead ends: 1393 [2022-11-03 02:19:07,845 INFO L226 Difference]: Without dead ends: 1286 [2022-11-03 02:19:07,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 636 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:19:07,846 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 520 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:07,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 1796 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2022-11-03 02:19:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2022-11-03 02:19:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1197. [2022-11-03 02:19:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 1.415551839464883) internal successors, (1693), 1196 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1693 transitions. [2022-11-03 02:19:07,873 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1693 transitions. Word has length 110 [2022-11-03 02:19:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:07,874 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1693 transitions. [2022-11-03 02:19:07,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.4375) internal successors, (215), 16 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1693 transitions. [2022-11-03 02:19:07,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:19:07,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:07,877 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:19:07,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:08,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:08,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-03 02:19:08,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:08,501 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:08,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:08,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1667966651, now seen corresponding path program 1 times [2022-11-03 02:19:08,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:19:08,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649151262] [2022-11-03 02:19:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:08,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:19:08,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:19:08,504 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:19:08,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:19:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:09,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:19:09,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:09,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:10,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:19:10,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649151262] [2022-11-03 02:19:10,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649151262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:10,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1374397534] [2022-11-03 02:19:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:10,495 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:19:10,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:19:10,498 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:19:10,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 02:19:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:11,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:19:11,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:12,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:12,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1374397534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:12,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833788078] [2022-11-03 02:19:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:12,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:12,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:12,654 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:12,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 02:19:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:13,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:19:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:13,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:14,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833788078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:14,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:19:14,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:19:14,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165049951] [2022-11-03 02:19:14,276 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:14,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:19:14,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:19:14,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:19:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:19:14,278 INFO L87 Difference]: Start difference. First operand 1197 states and 1693 transitions. Second operand has 16 states, 16 states have (on average 13.5625) internal successors, (217), 16 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:14,542 INFO L93 Difference]: Finished difference Result 2185 states and 3088 transitions. [2022-11-03 02:19:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:19:14,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.5625) internal successors, (217), 16 states have internal predecessors, (217), 0 states have call successors, (0), 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 110 [2022-11-03 02:19:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:14,549 INFO L225 Difference]: With dead ends: 2185 [2022-11-03 02:19:14,549 INFO L226 Difference]: Without dead ends: 2078 [2022-11-03 02:19:14,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 636 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:19:14,551 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 234 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:14,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1543 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-11-03 02:19:14,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2022-11-03 02:19:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 2076. [2022-11-03 02:19:14,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 1.4106024096385543) internal successors, (2927), 2075 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2927 transitions. [2022-11-03 02:19:14,596 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2927 transitions. Word has length 110 [2022-11-03 02:19:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:14,596 INFO L495 AbstractCegarLoop]: Abstraction has 2076 states and 2927 transitions. [2022-11-03 02:19:14,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.5625) internal successors, (217), 16 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2927 transitions. [2022-11-03 02:19:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:19:14,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:14,601 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:19:14,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:14,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-11-03 02:19:15,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:15,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:19:15,214 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:15,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:15,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1640901049, now seen corresponding path program 1 times [2022-11-03 02:19:15,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:19:15,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225813368] [2022-11-03 02:19:15,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:15,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:19:15,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:19:15,217 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:19:15,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:19:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:15,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:19:15,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:17,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:26,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:19:26,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225813368] [2022-11-03 02:19:26,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225813368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:26,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2010162038] [2022-11-03 02:19:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:26,475 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:19:26,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:19:26,476 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:19:26,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:19:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:27,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:19:27,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:28,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:28,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2010162038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:28,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679779501] [2022-11-03 02:20:28,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:28,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:28,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:28,578 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:28,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:20:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:20:29,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:20:32,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:20:40,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679779501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:40,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:20:40,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 02:20:40,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512985267] [2022-11-03 02:20:40,402 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:20:40,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:20:40,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:20:40,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:20:40,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1328, Unknown=29, NotChecked=0, Total=1560 [2022-11-03 02:20:40,405 INFO L87 Difference]: Start difference. First operand 2076 states and 2927 transitions. Second operand has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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 02:20:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:45,071 INFO L93 Difference]: Finished difference Result 2337 states and 3273 transitions. [2022-11-03 02:20:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:20:45,072 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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) Word has length 110 [2022-11-03 02:20:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:45,079 INFO L225 Difference]: With dead ends: 2337 [2022-11-03 02:20:45,080 INFO L226 Difference]: Without dead ends: 2335 [2022-11-03 02:20:45,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 621 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 76.6s TimeCoverageRelationStatistics Valid=518, Invalid=2993, Unknown=29, NotChecked=0, Total=3540 [2022-11-03 02:20:45,082 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 816 mSDsluCounter, 3408 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 3538 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:45,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 3538 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time] [2022-11-03 02:20:45,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2022-11-03 02:20:45,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 2316. [2022-11-03 02:20:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.403023758099352) internal successors, (3248), 2315 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3248 transitions. [2022-11-03 02:20:45,145 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3248 transitions. Word has length 110 [2022-11-03 02:20:45,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:45,145 INFO L495 AbstractCegarLoop]: Abstraction has 2316 states and 3248 transitions. [2022-11-03 02:20:45,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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 02:20:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3248 transitions. [2022-11-03 02:20:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:20:45,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:45,151 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:20:45,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-11-03 02:20:45,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:45,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:45,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:45,763 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:45,763 INFO L85 PathProgramCache]: Analyzing trace with hash -939301175, now seen corresponding path program 1 times [2022-11-03 02:20:45,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:20:45,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488162360] [2022-11-03 02:20:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:45,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:20:45,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:20:45,766 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:20:45,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:20:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:46,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:20:46,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:49,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:00,584 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:00,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488162360] [2022-11-03 02:21:00,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488162360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:00,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [546837795] [2022-11-03 02:21:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:00,585 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:00,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:00,590 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:00,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:21:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:01,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:21:01,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:04,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:06,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [546837795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:06,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252775348] [2022-11-03 02:22:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:06,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:06,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:06,175 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:06,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 02:22:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:06,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:22:06,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:22:09,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:22:16,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252775348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:16,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:22:16,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 02:22:16,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859934116] [2022-11-03 02:22:16,988 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:16,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:22:16,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:22:16,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:22:16,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1328, Unknown=29, NotChecked=0, Total=1560 [2022-11-03 02:22:16,990 INFO L87 Difference]: Start difference. First operand 2316 states and 3248 transitions. Second operand has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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 02:22:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:21,420 INFO L93 Difference]: Finished difference Result 2871 states and 3984 transitions. [2022-11-03 02:22:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:22:21,421 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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) Word has length 110 [2022-11-03 02:22:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:21,428 INFO L225 Difference]: With dead ends: 2871 [2022-11-03 02:22:21,429 INFO L226 Difference]: Without dead ends: 2869 [2022-11-03 02:22:21,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 621 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 79.4s TimeCoverageRelationStatistics Valid=518, Invalid=2993, Unknown=29, NotChecked=0, Total=3540 [2022-11-03 02:22:21,431 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 796 mSDsluCounter, 3047 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:21,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 3177 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-11-03 02:22:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2869 states. [2022-11-03 02:22:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2869 to 2832. [2022-11-03 02:22:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2831 states have (on average 1.3910279053338044) internal successors, (3938), 2831 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3938 transitions. [2022-11-03 02:22:21,519 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3938 transitions. Word has length 110 [2022-11-03 02:22:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:21,519 INFO L495 AbstractCegarLoop]: Abstraction has 2832 states and 3938 transitions. [2022-11-03 02:22:21,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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 02:22:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3938 transitions. [2022-11-03 02:22:21,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:22:21,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:21,526 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:22:21,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:21,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 02:22:21,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-03 02:22:22,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:22:22,147 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:22,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:22,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1783306677, now seen corresponding path program 1 times [2022-11-03 02:22:22,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:22:22,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110095746] [2022-11-03 02:22:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:22,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:22:22,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:22:22,150 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:22:22,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:22:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:22,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:22:22,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:25,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:31,861 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:22:31,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110095746] [2022-11-03 02:22:31,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110095746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:31,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1621062301] [2022-11-03 02:22:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:31,861 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:22:31,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:22:31,862 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:22:31,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 02:22:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:33,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:22:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:35,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:23:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:34,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1621062301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:23:34,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038765054] [2022-11-03 02:23:34,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:34,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:23:34,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:23:34,040 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:23:34,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 02:23:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:34,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:23:34,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:23:37,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:23:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:23:45,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038765054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:23:45,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:23:45,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 02:23:45,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994132793] [2022-11-03 02:23:45,789 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:23:45,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:23:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:23:45,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:23:45,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1332, Unknown=25, NotChecked=0, Total=1560 [2022-11-03 02:23:45,792 INFO L87 Difference]: Start difference. First operand 2832 states and 3938 transitions. Second operand has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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 02:23:51,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:23:51,409 INFO L93 Difference]: Finished difference Result 5697 states and 7914 transitions. [2022-11-03 02:23:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:23:51,410 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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) Word has length 110 [2022-11-03 02:23:51,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:23:51,424 INFO L225 Difference]: With dead ends: 5697 [2022-11-03 02:23:51,425 INFO L226 Difference]: Without dead ends: 5695 [2022-11-03 02:23:51,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 622 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 72.2s TimeCoverageRelationStatistics Valid=518, Invalid=2997, Unknown=25, NotChecked=0, Total=3540 [2022-11-03 02:23:51,428 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 597 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 3352 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:23:51,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 3352 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-11-03 02:23:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2022-11-03 02:23:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 5628. [2022-11-03 02:23:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5628 states, 5627 states have (on average 1.3918606717611517) internal successors, (7832), 5627 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 7832 transitions. [2022-11-03 02:23:51,601 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 7832 transitions. Word has length 110 [2022-11-03 02:23:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:23:51,602 INFO L495 AbstractCegarLoop]: Abstraction has 5628 states and 7832 transitions. [2022-11-03 02:23:51,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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 02:23:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 7832 transitions. [2022-11-03 02:23:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:23:51,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:51,611 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:23:51,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:51,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-03 02:23:52,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:52,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:23:52,235 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:23:52,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:52,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1798825395, now seen corresponding path program 1 times [2022-11-03 02:23:52,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:23:52,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94434276] [2022-11-03 02:23:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:52,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:23:52,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:23:52,238 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:23:52,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:23:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:53,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:23:53,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:23:56,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:14,548 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:24:14,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94434276] [2022-11-03 02:24:14,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94434276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:14,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1811038063] [2022-11-03 02:24:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:14,549 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:24:14,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:24:14,550 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:24:14,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 02:24:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:15,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:24:15,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:24:19,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:16,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1811038063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:25:16,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748462243] [2022-11-03 02:25:16,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:16,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:16,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:16,183 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:16,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 02:25:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:16,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:25:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:25:20,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:25:28,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748462243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:25:28,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:25:28,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 02:25:28,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545960343] [2022-11-03 02:25:28,685 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:25:28,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:25:28,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:25:28,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:25:28,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1328, Unknown=27, NotChecked=0, Total=1560 [2022-11-03 02:25:28,687 INFO L87 Difference]: Start difference. First operand 5628 states and 7832 transitions. Second operand has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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 02:25:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:34,703 INFO L93 Difference]: Finished difference Result 7245 states and 10058 transitions. [2022-11-03 02:25:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:25:34,704 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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) Word has length 110 [2022-11-03 02:25:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:34,724 INFO L225 Difference]: With dead ends: 7245 [2022-11-03 02:25:34,724 INFO L226 Difference]: Without dead ends: 7243 [2022-11-03 02:25:34,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 622 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 83.9s TimeCoverageRelationStatistics Valid=520, Invalid=2993, Unknown=27, NotChecked=0, Total=3540 [2022-11-03 02:25:34,727 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 740 mSDsluCounter, 3494 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 3624 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:34,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 3624 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-11-03 02:25:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7243 states. [2022-11-03 02:25:34,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7243 to 7140. [2022-11-03 02:25:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 1.391791567446421) internal successors, (9936), 7139 states have internal predecessors, (9936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 9936 transitions. [2022-11-03 02:25:35,024 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 9936 transitions. Word has length 110 [2022-11-03 02:25:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:35,024 INFO L495 AbstractCegarLoop]: Abstraction has 7140 states and 9936 transitions. [2022-11-03 02:25:35,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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 02:25:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 9936 transitions. [2022-11-03 02:25:35,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:25:35,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:35,035 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:25:35,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:35,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-03 02:25:35,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:35,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:25:35,660 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:35,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2131581169, now seen corresponding path program 1 times [2022-11-03 02:25:35,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:25:35,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139287448] [2022-11-03 02:25:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:35,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:25:35,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:25:35,664 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:25:35,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:25:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:36,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:25:36,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:38,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:39,452 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:25:39,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139287448] [2022-11-03 02:25:39,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139287448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:25:39,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1842865315] [2022-11-03 02:25:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:39,453 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:25:39,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:25:39,454 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:25:39,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:25:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:40,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:25:40,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:42,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:43,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1842865315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:25:43,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124099932] [2022-11-03 02:25:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:43,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:43,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:43,171 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:43,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 02:25:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:43,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:25:43,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:45,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:46,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124099932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:25:46,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:25:46,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:25:46,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660593156] [2022-11-03 02:25:46,159 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:25:46,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:25:46,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:25:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:25:46,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:25:46,161 INFO L87 Difference]: Start difference. First operand 7140 states and 9936 transitions. Second operand has 16 states, 16 states have (on average 13.3125) internal successors, (213), 16 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:46,519 INFO L93 Difference]: Finished difference Result 10940 states and 15363 transitions. [2022-11-03 02:25:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:25:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.3125) internal successors, (213), 16 states have internal predecessors, (213), 0 states have call successors, (0), 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 110 [2022-11-03 02:25:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:46,542 INFO L225 Difference]: With dead ends: 10940 [2022-11-03 02:25:46,542 INFO L226 Difference]: Without dead ends: 10108 [2022-11-03 02:25:46,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 636 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:25:46,546 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 389 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 2409 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:46,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 2409 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2022-11-03 02:25:46,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10108 states. [2022-11-03 02:25:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10108 to 8660. [2022-11-03 02:25:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8660 states, 8659 states have (on average 1.3876891095969512) internal successors, (12016), 8659 states have internal predecessors, (12016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8660 states to 8660 states and 12016 transitions. [2022-11-03 02:25:46,836 INFO L78 Accepts]: Start accepts. Automaton has 8660 states and 12016 transitions. Word has length 110 [2022-11-03 02:25:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:46,836 INFO L495 AbstractCegarLoop]: Abstraction has 8660 states and 12016 transitions. [2022-11-03 02:25:46,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.3125) internal successors, (213), 16 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 8660 states and 12016 transitions. [2022-11-03 02:25:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:25:46,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:46,849 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:25:46,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:47,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-03 02:25:47,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-03 02:25:47,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:25:47,471 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:47,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1354039501, now seen corresponding path program 1 times [2022-11-03 02:25:47,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:25:47,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781813304] [2022-11-03 02:25:47,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:47,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:25:47,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:25:47,474 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:25:47,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:25:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:48,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:25:48,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:25:51,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:26:02,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:02,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781813304] [2022-11-03 02:26:02,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781813304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:02,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [497287973] [2022-11-03 02:26:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:02,907 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:26:02,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:26:02,910 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:26:02,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 02:26:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:04,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:26:04,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:26:07,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:12,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [497287973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:12,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790083695] [2022-11-03 02:27:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:12,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:12,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:12,914 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:12,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 02:27:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:13,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:27:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:27:17,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:27:26,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790083695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:26,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:27:26,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 02:27:26,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464322054] [2022-11-03 02:27:26,290 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:27:26,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:27:26,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:27:26,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:27:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1321, Unknown=30, NotChecked=0, Total=1560 [2022-11-03 02:27:26,292 INFO L87 Difference]: Start difference. First operand 8660 states and 12016 transitions. Second operand has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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 02:27:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:32,001 INFO L93 Difference]: Finished difference Result 12394 states and 17427 transitions. [2022-11-03 02:27:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:27:32,001 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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) Word has length 110 [2022-11-03 02:27:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:32,022 INFO L225 Difference]: With dead ends: 12394 [2022-11-03 02:27:32,023 INFO L226 Difference]: Without dead ends: 12392 [2022-11-03 02:27:32,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 625 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 85.4s TimeCoverageRelationStatistics Valid=522, Invalid=3108, Unknown=30, NotChecked=0, Total=3660 [2022-11-03 02:27:32,028 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 817 mSDsluCounter, 4236 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 4370 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:32,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 4370 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-11-03 02:27:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12392 states. [2022-11-03 02:27:32,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12392 to 11251. [2022-11-03 02:27:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11251 states, 11250 states have (on average 1.4045333333333334) internal successors, (15801), 11250 states have internal predecessors, (15801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11251 states to 11251 states and 15801 transitions. [2022-11-03 02:27:32,525 INFO L78 Accepts]: Start accepts. Automaton has 11251 states and 15801 transitions. Word has length 110 [2022-11-03 02:27:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:32,525 INFO L495 AbstractCegarLoop]: Abstraction has 11251 states and 15801 transitions. [2022-11-03 02:27:32,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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 02:27:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 11251 states and 15801 transitions. [2022-11-03 02:27:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:27:32,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:32,538 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:27:32,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:32,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-03 02:27:32,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 02:27:33,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:27:33,152 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:33,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1381045521, now seen corresponding path program 1 times [2022-11-03 02:27:33,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:27:33,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559787150] [2022-11-03 02:27:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:33,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:27:33,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:27:33,156 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:27:33,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:27:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:33,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:27:33,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:37,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:46,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:27:46,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559787150] [2022-11-03 02:27:46,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559787150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:46,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1878814322] [2022-11-03 02:27:46,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:46,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:27:46,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:27:46,703 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:27:46,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 02:27:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:48,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:27:48,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:52,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:04,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1878814322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:04,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944790872] [2022-11-03 02:29:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:04,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:04,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:04,520 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:04,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-03 02:29:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:05,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:29:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:13,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:34,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944790872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:34,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:29:34,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 10] total 35 [2022-11-03 02:29:34,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416784770] [2022-11-03 02:29:34,493 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:34,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:29:34,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:29:34,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:29:34,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=979, Unknown=39, NotChecked=0, Total=1190 [2022-11-03 02:29:34,496 INFO L87 Difference]: Start difference. First operand 11251 states and 15801 transitions. Second operand has 35 states, 35 states have (on average 15.142857142857142) internal successors, (530), 35 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:50,385 INFO L93 Difference]: Finished difference Result 13465 states and 18932 transitions. [2022-11-03 02:29:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:29:50,385 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 15.142857142857142) internal successors, (530), 35 states have internal predecessors, (530), 0 states have call successors, (0), 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 110 [2022-11-03 02:29:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:50,408 INFO L225 Difference]: With dead ends: 13465 [2022-11-03 02:29:50,408 INFO L226 Difference]: Without dead ends: 13463 [2022-11-03 02:29:50,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 625 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 115.9s TimeCoverageRelationStatistics Valid=370, Invalid=1747, Unknown=45, NotChecked=0, Total=2162 [2022-11-03 02:29:50,414 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 1160 mSDsluCounter, 3544 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 3692 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:50,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1160 Valid, 3692 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-11-03 02:29:50,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13463 states. [2022-11-03 02:29:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13463 to 13322. [2022-11-03 02:29:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13322 states, 13321 states have (on average 1.4060505968020418) internal successors, (18730), 13321 states have internal predecessors, (18730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13322 states to 13322 states and 18730 transitions. [2022-11-03 02:29:50,961 INFO L78 Accepts]: Start accepts. Automaton has 13322 states and 18730 transitions. Word has length 110 [2022-11-03 02:29:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:50,961 INFO L495 AbstractCegarLoop]: Abstraction has 13322 states and 18730 transitions. [2022-11-03 02:29:50,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 15.142857142857142) internal successors, (530), 35 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:50,963 INFO L276 IsEmpty]: Start isEmpty. Operand 13322 states and 18730 transitions. [2022-11-03 02:29:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:29:50,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:50,976 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:29:51,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:51,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-11-03 02:29:51,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:51,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:51,591 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:51,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:51,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1381105103, now seen corresponding path program 1 times [2022-11-03 02:29:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:29:51,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769662278] [2022-11-03 02:29:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:51,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:29:51,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:29:51,594 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:29:51,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 02:29:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:52,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:29:52,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:56,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:04,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:04,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769662278] [2022-11-03 02:30:04,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769662278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:04,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1927948670] [2022-11-03 02:30:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:04,619 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:04,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:04,620 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:04,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 02:30:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:06,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:30:06,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:09,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:19,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1927948670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:19,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497234384] [2022-11-03 02:31:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:19,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:19,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:19,724 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:19,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-03 02:31:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:20,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:31:20,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:31:24,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:31:34,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497234384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:34,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:31:34,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 40 [2022-11-03 02:31:34,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072265764] [2022-11-03 02:31:34,475 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:34,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:31:34,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:34,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:31:34,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1324, Unknown=26, NotChecked=0, Total=1560 [2022-11-03 02:31:34,478 INFO L87 Difference]: Start difference. First operand 13322 states and 18730 transitions. Second operand has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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 02:31:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:41,839 INFO L93 Difference]: Finished difference Result 18301 states and 26008 transitions. [2022-11-03 02:31:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:31:41,840 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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) Word has length 110 [2022-11-03 02:31:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:41,858 INFO L225 Difference]: With dead ends: 18301 [2022-11-03 02:31:41,859 INFO L226 Difference]: Without dead ends: 18299 [2022-11-03 02:31:41,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 624 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 88.8s TimeCoverageRelationStatistics Valid=523, Invalid=3111, Unknown=26, NotChecked=0, Total=3660 [2022-11-03 02:31:41,866 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 1216 mSDsluCounter, 4146 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 4278 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:41,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1216 Valid, 4278 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 97 Unchecked, 0.0s Time] [2022-11-03 02:31:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18299 states. [2022-11-03 02:31:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18299 to 17869. [2022-11-03 02:31:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17869 states, 17868 states have (on average 1.4265166778598612) internal successors, (25489), 17868 states have internal predecessors, (25489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17869 states to 17869 states and 25489 transitions. [2022-11-03 02:31:42,640 INFO L78 Accepts]: Start accepts. Automaton has 17869 states and 25489 transitions. Word has length 110 [2022-11-03 02:31:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:42,641 INFO L495 AbstractCegarLoop]: Abstraction has 17869 states and 25489 transitions. [2022-11-03 02:31:42,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 13.3) internal successors, (532), 40 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 02:31:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 17869 states and 25489 transitions. [2022-11-03 02:31:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:31:42,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:42,654 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:31:42,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:42,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:43,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 02:31:43,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:43,279 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:43,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:43,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2146011855, now seen corresponding path program 1 times [2022-11-03 02:31:43,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:43,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251096748] [2022-11-03 02:31:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:43,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:43,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:43,282 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:43,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 02:31:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:44,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:31:44,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:47,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:55,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:55,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251096748] [2022-11-03 02:31:55,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251096748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:55,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1563328929] [2022-11-03 02:31:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:55,339 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:55,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:55,343 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:55,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6443719-77dd-4e6b-8425-aac1f2052f61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 02:31:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:56,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:31:56,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:59,798 INFO L328 TraceCheckSpWp]: Computing backward predicates...