./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p06.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_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/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_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/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_93dcd8d5-cf46-487e-a488-a617f0ddd98e/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 40a9698cd1f506d6a856b33d872fce85f12f9f3b9fe0d2e800ed6327fc1a6049 --- 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 03:47:18,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:47:18,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:47:18,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:47:18,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:47:18,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:47:18,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:47:18,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:47:18,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:47:18,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:47:18,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:47:18,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:47:18,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:47:18,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:47:18,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:47:18,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:47:18,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:47:18,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:47:18,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:47:18,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:47:18,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:47:18,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:47:18,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:47:18,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:47:18,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:47:18,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:47:18,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:47:18,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:47:18,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:47:18,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:47:18,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:47:18,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:47:18,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:47:18,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:47:18,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:47:18,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:47:18,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:47:18,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:47:18,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:47:18,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:47:18,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:47:18,223 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:47:18,252 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:47:18,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:47:18,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:47:18,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:47:18,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:47:18,253 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:47:18,253 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:47:18,254 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:47:18,254 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:47:18,254 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:47:18,254 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:47:18,254 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:47:18,254 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:47:18,255 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:47:18,255 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:47:18,255 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:47:18,255 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:47:18,255 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:47:18,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:47:18,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:47:18,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:47:18,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:47:18,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:47:18,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:47:18,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:47:18,257 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:47:18,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:47:18,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:47:18,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:47:18,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:18,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:47:18,258 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:47:18,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:47:18,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:47:18,259 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:47:18,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:47:18,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:47:18,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:47:18,259 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_93dcd8d5-cf46-487e-a488-a617f0ddd98e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40a9698cd1f506d6a856b33d872fce85f12f9f3b9fe0d2e800ed6327fc1a6049 [2022-11-03 03:47:18,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:47:18,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:47:18,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:47:18,630 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:47:18,631 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:47:18,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p06.c [2022-11-03 03:47:18,701 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/data/245f59c5e/00435cfcfada4e7e97d6b4d852a24b89/FLAG1aedd71dc [2022-11-03 03:47:19,266 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:47:19,267 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p06.c [2022-11-03 03:47:19,278 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/data/245f59c5e/00435cfcfada4e7e97d6b4d852a24b89/FLAG1aedd71dc [2022-11-03 03:47:19,537 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/data/245f59c5e/00435cfcfada4e7e97d6b4d852a24b89 [2022-11-03 03:47:19,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:47:19,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:47:19,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:19,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:47:19,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:47:19,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:19" (1/1) ... [2022-11-03 03:47:19,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6795c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:19, skipping insertion in model container [2022-11-03 03:47:19,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:19" (1/1) ... [2022-11-03 03:47:19,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:47:19,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:47:19,830 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_93dcd8d5-cf46-487e-a488-a617f0ddd98e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p06.c[1107,1120] [2022-11-03 03:47:20,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:20,122 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:47:20,133 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_93dcd8d5-cf46-487e-a488-a617f0ddd98e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p06.c[1107,1120] [2022-11-03 03:47:20,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:20,337 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:47:20,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20 WrapperNode [2022-11-03 03:47:20,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:20,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:20,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:47:20,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:47:20,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20" (1/1) ... [2022-11-03 03:47:20,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20" (1/1) ... [2022-11-03 03:47:20,532 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1395 [2022-11-03 03:47:20,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:20,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:47:20,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:47:20,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:47:20,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20" (1/1) ... [2022-11-03 03:47:20,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20" (1/1) ... [2022-11-03 03:47:20,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20" (1/1) ... [2022-11-03 03:47:20,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20" (1/1) ... [2022-11-03 03:47:20,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20" (1/1) ... [2022-11-03 03:47:20,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20" (1/1) ... [2022-11-03 03:47:20,616 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20" (1/1) ... [2022-11-03 03:47:20,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20" (1/1) ... [2022-11-03 03:47:20,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:47:20,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:47:20,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:47:20,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:47:20,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20" (1/1) ... [2022-11-03 03:47:20,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:20,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:20,689 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:47:20,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:47:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:47:20,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:47:21,170 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:47:21,173 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:47:22,766 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:47:26,717 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:47:26,717 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:47:26,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:26 BoogieIcfgContainer [2022-11-03 03:47:26,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:47:26,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:47:26,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:47:26,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:47:26,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:47:19" (1/3) ... [2022-11-03 03:47:26,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176f8cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:26, skipping insertion in model container [2022-11-03 03:47:26,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:20" (2/3) ... [2022-11-03 03:47:26,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176f8cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:26, skipping insertion in model container [2022-11-03 03:47:26,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:26" (3/3) ... [2022-11-03 03:47:26,730 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsaR_p06.c [2022-11-03 03:47:26,749 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:47:26,750 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:47:26,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:47:26,824 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;@fec6949, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:47:26,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:47:26,833 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 03:47:26,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:47:26,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:26,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:47:26,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:26,849 INFO L85 PathProgramCache]: Analyzing trace with hash 19969998, now seen corresponding path program 1 times [2022-11-03 03:47:26,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:26,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452829155] [2022-11-03 03:47:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:26,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:47:27,279 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:47:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:47:27,500 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:47:27,505 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:47:27,507 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:47:27,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:47:27,514 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:47:27,518 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:47:27,557 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:47:27,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:47:27 BoogieIcfgContainer [2022-11-03 03:47:27,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:47:27,579 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:47:27,579 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:47:27,579 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:47:27,580 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:26" (3/4) ... [2022-11-03 03:47:27,584 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:47:27,584 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:47:27,587 INFO L158 Benchmark]: Toolchain (without parser) took 8045.52ms. Allocated memory was 117.4MB in the beginning and 713.0MB in the end (delta: 595.6MB). Free memory was 80.4MB in the beginning and 448.9MB in the end (delta: -368.5MB). Peak memory consumption was 227.5MB. Max. memory is 16.1GB. [2022-11-03 03:47:27,588 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 117.4MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:47:27,588 INFO L158 Benchmark]: CACSL2BoogieTranslator took 795.63ms. Allocated memory is still 117.4MB. Free memory was 80.2MB in the beginning and 66.1MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 03:47:27,590 INFO L158 Benchmark]: Boogie Procedure Inliner took 193.17ms. Allocated memory is still 117.4MB. Free memory was 66.1MB in the beginning and 85.6MB in the end (delta: -19.5MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. [2022-11-03 03:47:27,591 INFO L158 Benchmark]: Boogie Preprocessor took 107.82ms. Allocated memory is still 117.4MB. Free memory was 85.6MB in the beginning and 76.6MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 03:47:27,597 INFO L158 Benchmark]: RCFGBuilder took 6079.35ms. Allocated memory was 117.4MB in the beginning and 713.0MB in the end (delta: 595.6MB). Free memory was 76.6MB in the beginning and 510.8MB in the end (delta: -434.1MB). Peak memory consumption was 302.0MB. Max. memory is 16.1GB. [2022-11-03 03:47:27,599 INFO L158 Benchmark]: TraceAbstraction took 854.06ms. Allocated memory is still 713.0MB. Free memory was 509.7MB in the beginning and 448.9MB in the end (delta: 60.8MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2022-11-03 03:47:27,600 INFO L158 Benchmark]: Witness Printer took 6.84ms. Allocated memory is still 713.0MB. Free memory was 448.9MB in the beginning and 448.9MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:47:27,608 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 117.4MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 795.63ms. Allocated memory is still 117.4MB. Free memory was 80.2MB in the beginning and 66.1MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 193.17ms. Allocated memory is still 117.4MB. Free memory was 66.1MB in the beginning and 85.6MB in the end (delta: -19.5MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 107.82ms. Allocated memory is still 117.4MB. Free memory was 85.6MB in the beginning and 76.6MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 6079.35ms. Allocated memory was 117.4MB in the beginning and 713.0MB in the end (delta: 595.6MB). Free memory was 76.6MB in the beginning and 510.8MB in the end (delta: -434.1MB). Peak memory consumption was 302.0MB. Max. memory is 16.1GB. * TraceAbstraction took 854.06ms. Allocated memory is still 713.0MB. Free memory was 509.7MB in the beginning and 448.9MB in the end (delta: 60.8MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. * Witness Printer took 6.84ms. Allocated memory is still 713.0MB. Free memory was 448.9MB in the beginning and 448.9MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 157, overapproximation of bitwiseOr at line 165, overapproximation of bitwiseAnd at line 147. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 5); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (5 - 1); [L31] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 12); [L32] const SORT_5 msb_SORT_5 = (SORT_5)1 << (12 - 1); [L34] const SORT_10 mask_SORT_10 = (SORT_10)-1 >> (sizeof(SORT_10) * 8 - 3); [L35] const SORT_10 msb_SORT_10 = (SORT_10)1 << (3 - 1); [L37] const SORT_80 mask_SORT_80 = (SORT_80)-1 >> (sizeof(SORT_80) * 8 - 32); [L38] const SORT_80 msb_SORT_80 = (SORT_80)1 << (32 - 1); [L40] const SORT_99 mask_SORT_99 = (SORT_99)-1 >> (sizeof(SORT_99) * 8 - 4); [L41] const SORT_99 msb_SORT_99 = (SORT_99)1 << (4 - 1); [L43] const SORT_176 mask_SORT_176 = (SORT_176)-1 >> (sizeof(SORT_176) * 8 - 2); [L44] const SORT_176 msb_SORT_176 = (SORT_176)1 << (2 - 1); [L46] const SORT_5 var_7 = 0; [L47] const SORT_10 var_12 = 2; [L48] const SORT_10 var_14 = 0; [L49] const SORT_1 var_20 = 0; [L50] const SORT_3 var_24 = 0; [L51] const SORT_1 var_35 = 1; [L52] const SORT_10 var_59 = 1; [L53] const SORT_10 var_64 = 4; [L54] const SORT_10 var_66 = 5; [L55] const SORT_10 var_70 = 3; [L56] const SORT_80 var_82 = 0; [L57] const SORT_10 var_116 = 7; [L58] const SORT_10 var_121 = 6; [L59] const SORT_3 var_162 = 2; [L60] const SORT_3 var_185 = 31; [L62] SORT_1 input_2; [L63] SORT_3 input_4; [L64] SORT_5 input_6; [L65] SORT_3 input_173; [L66] SORT_3 input_174; [L67] SORT_3 input_175; [L68] SORT_3 input_184; [L69] SORT_3 input_194; [L70] SORT_3 input_195; [L71] SORT_3 input_196; [L72] SORT_3 input_199; [L73] SORT_3 input_218; [L74] SORT_3 input_219; [L75] SORT_3 input_220; [L76] SORT_3 input_223; [L77] SORT_3 input_225; [L78] SORT_176 input_239; [L79] SORT_176 input_240; [L80] SORT_176 input_241; [L82] SORT_5 state_8 = __VERIFIER_nondet_ushort() & mask_SORT_5; [L83] SORT_10 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_10; [L84] SORT_1 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_3 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L86] SORT_3 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L87] SORT_3 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L88] SORT_3 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L89] SORT_3 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L90] SORT_3 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L91] SORT_3 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L92] SORT_3 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L93] SORT_3 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L94] SORT_3 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L96] SORT_5 init_9_arg_1 = var_7; [L97] state_8 = init_9_arg_1 [L98] SORT_10 init_16_arg_1 = var_14; [L99] state_15 = init_16_arg_1 [L100] SORT_1 init_22_arg_1 = var_20; [L101] state_21 = init_22_arg_1 [L102] SORT_3 init_26_arg_1 = var_24; [L103] state_25 = init_26_arg_1 [L104] SORT_3 init_40_arg_1 = var_24; [L105] state_39 = init_40_arg_1 [L106] SORT_3 init_42_arg_1 = var_24; [L107] state_41 = init_42_arg_1 [L108] SORT_3 init_44_arg_1 = var_24; [L109] state_43 = init_44_arg_1 [L110] SORT_3 init_46_arg_1 = var_24; [L111] state_45 = init_46_arg_1 [L112] SORT_3 init_48_arg_1 = var_24; [L113] state_47 = init_48_arg_1 [L114] SORT_3 init_50_arg_1 = var_24; [L115] state_49 = init_50_arg_1 [L116] SORT_3 init_52_arg_1 = var_24; [L117] state_51 = init_52_arg_1 [L118] SORT_3 init_54_arg_1 = var_24; [L119] state_53 = init_54_arg_1 [L120] SORT_3 init_56_arg_1 = var_24; [L121] state_55 = init_56_arg_1 VAL [init_16_arg_1=0, init_22_arg_1=0, init_26_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_9_arg_1=0, mask_SORT_1=1, mask_SORT_10=7, mask_SORT_176=3, mask_SORT_3=31, mask_SORT_5=4095, mask_SORT_80=4294967295, mask_SORT_99=15, msb_SORT_1=1, msb_SORT_10=4, msb_SORT_176=2, msb_SORT_3=16, msb_SORT_5=2048, msb_SORT_80=2147483648, msb_SORT_99=8, state_15=0, state_21=0, state_25=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_8=0, var_116=7, var_12=2, var_121=6, var_14=0, var_162=2, var_185=31, var_20=0, var_24=0, var_35=1, var_59=1, var_64=4, var_66=5, var_7=0, var_70=3, var_82=0] [L124] input_2 = __VERIFIER_nondet_uchar() [L125] input_4 = __VERIFIER_nondet_uchar() [L126] input_6 = __VERIFIER_nondet_ushort() [L127] input_173 = __VERIFIER_nondet_uchar() [L128] input_174 = __VERIFIER_nondet_uchar() [L129] input_175 = __VERIFIER_nondet_uchar() [L130] input_184 = __VERIFIER_nondet_uchar() [L131] input_194 = __VERIFIER_nondet_uchar() [L132] input_195 = __VERIFIER_nondet_uchar() [L133] input_196 = __VERIFIER_nondet_uchar() [L134] input_199 = __VERIFIER_nondet_uchar() [L135] input_218 = __VERIFIER_nondet_uchar() [L136] input_219 = __VERIFIER_nondet_uchar() [L137] input_220 = __VERIFIER_nondet_uchar() [L138] input_223 = __VERIFIER_nondet_uchar() [L139] input_225 = __VERIFIER_nondet_uchar() [L140] input_239 = __VERIFIER_nondet_uchar() [L141] input_240 = __VERIFIER_nondet_uchar() [L142] input_241 = __VERIFIER_nondet_uchar() [L145] SORT_5 var_11_arg_0 = state_8; [L146] SORT_10 var_11 = var_11_arg_0 >> 9; [L147] var_11 = var_11 & mask_SORT_10 [L148] SORT_10 var_13_arg_0 = var_11; [L149] SORT_10 var_13_arg_1 = var_12; [L150] SORT_1 var_13 = var_13_arg_0 == var_13_arg_1; [L151] SORT_10 var_17_arg_0 = state_15; [L152] SORT_1 var_17 = var_17_arg_0 >> 2; [L153] SORT_1 var_18_arg_0 = var_13; [L154] SORT_1 var_18_arg_1 = var_17; [L155] SORT_1 var_18 = var_18_arg_0 & var_18_arg_1; [L156] SORT_1 var_19_arg_0 = var_18; [L157] SORT_1 var_19 = ~var_19_arg_0; [L158] SORT_1 var_23_arg_0 = state_21; [L159] SORT_1 var_23 = ~var_23_arg_0; [L160] SORT_3 var_27_arg_0 = state_25; [L161] SORT_3 var_27_arg_1 = var_24; [L162] SORT_1 var_27 = var_27_arg_0 == var_27_arg_1; [L163] SORT_1 var_28_arg_0 = var_23; [L164] SORT_1 var_28_arg_1 = var_27; [L165] SORT_1 var_28 = var_28_arg_0 | var_28_arg_1; [L166] SORT_3 var_29_arg_0 = state_25; [L167] SORT_3 var_29_arg_1 = var_24; [L168] SORT_1 var_29 = var_29_arg_0 != var_29_arg_1; [L169] SORT_1 var_30_arg_0 = var_29; [L170] SORT_1 var_30_arg_1 = state_21; [L171] SORT_1 var_30 = var_30_arg_0 | var_30_arg_1; [L172] SORT_1 var_31_arg_0 = var_28; [L173] SORT_1 var_31_arg_1 = var_30; [L174] SORT_1 var_31 = var_31_arg_0 & var_31_arg_1; [L175] SORT_1 var_32_arg_0 = var_19; [L176] SORT_1 var_32_arg_1 = var_31; [L177] SORT_1 var_32 = var_32_arg_0 | var_32_arg_1; [L178] SORT_1 var_36_arg_0 = var_32; [L179] SORT_1 var_36 = ~var_36_arg_0; [L180] SORT_1 var_37_arg_0 = var_35; [L181] SORT_1 var_37_arg_1 = var_36; [L182] SORT_1 var_37 = var_37_arg_0 & var_37_arg_1; [L183] var_37 = var_37 & mask_SORT_1 [L184] SORT_1 bad_38_arg_0 = var_37; [L185] CALL __VERIFIER_assert(!(bad_38_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: 0.7s, 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, 0.3s 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 03:47:27,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/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_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/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_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/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_93dcd8d5-cf46-487e-a488-a617f0ddd98e/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 40a9698cd1f506d6a856b33d872fce85f12f9f3b9fe0d2e800ed6327fc1a6049 --- 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 03:47:30,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:47:30,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:47:30,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:47:30,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:47:30,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:47:30,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:47:30,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:47:30,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:47:30,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:47:30,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:47:30,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:47:30,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:47:30,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:47:30,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:47:30,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:47:30,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:47:30,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:47:30,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:47:30,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:47:30,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:47:30,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:47:30,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:47:30,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:47:30,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:47:30,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:47:30,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:47:30,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:47:30,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:47:30,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:47:30,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:47:30,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:47:30,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:47:30,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:47:30,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:47:30,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:47:30,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:47:30,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:47:30,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:47:30,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:47:30,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:47:30,201 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:47:30,245 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:47:30,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:47:30,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:47:30,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:47:30,249 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:47:30,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:47:30,249 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:47:30,249 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:47:30,249 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:47:30,250 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:47:30,251 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:47:30,251 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:47:30,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:47:30,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:47:30,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:47:30,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:47:30,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:47:30,254 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:47:30,254 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:47:30,254 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:47:30,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:47:30,254 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:47:30,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:47:30,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:47:30,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:47:30,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:47:30,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:30,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:47:30,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:47:30,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:47:30,256 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:47:30,256 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:30,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:47:30,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:47:30,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:47:30,257 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_93dcd8d5-cf46-487e-a488-a617f0ddd98e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40a9698cd1f506d6a856b33d872fce85f12f9f3b9fe0d2e800ed6327fc1a6049 [2022-11-03 03:47:30,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:47:30,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:47:30,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:47:30,647 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:47:30,648 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:47:30,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p06.c [2022-11-03 03:47:30,725 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/data/1f847be2f/4aca5d7a49ab4241a2d217e60583b74d/FLAGaafed7818 [2022-11-03 03:47:31,319 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:47:31,320 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p06.c [2022-11-03 03:47:31,335 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/data/1f847be2f/4aca5d7a49ab4241a2d217e60583b74d/FLAGaafed7818 [2022-11-03 03:47:31,568 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/data/1f847be2f/4aca5d7a49ab4241a2d217e60583b74d [2022-11-03 03:47:31,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:47:31,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:47:31,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:31,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:47:31,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:47:31,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:31" (1/1) ... [2022-11-03 03:47:31,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6cac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:31, skipping insertion in model container [2022-11-03 03:47:31,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:31" (1/1) ... [2022-11-03 03:47:31,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:47:31,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:47:31,805 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_93dcd8d5-cf46-487e-a488-a617f0ddd98e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p06.c[1107,1120] [2022-11-03 03:47:32,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:32,081 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:47:32,092 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_93dcd8d5-cf46-487e-a488-a617f0ddd98e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_arrays_vsaR_p06.c[1107,1120] [2022-11-03 03:47:32,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:32,303 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:47:32,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32 WrapperNode [2022-11-03 03:47:32,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:32,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:32,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:47:32,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:47:32,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,410 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1395 [2022-11-03 03:47:32,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:32,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:47:32,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:47:32,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:47:32,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,479 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:47:32,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:47:32,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:47:32,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:47:32,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32" (1/1) ... [2022-11-03 03:47:32,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:32,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:32,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:47:32,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:47:32,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:47:32,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:47:33,006 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:47:33,021 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:47:34,147 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:47:34,161 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:47:34,162 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:47:34,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:34 BoogieIcfgContainer [2022-11-03 03:47:34,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:47:34,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:47:34,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:47:34,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:47:34,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:47:31" (1/3) ... [2022-11-03 03:47:34,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f96fb34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:34, skipping insertion in model container [2022-11-03 03:47:34,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:32" (2/3) ... [2022-11-03 03:47:34,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f96fb34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:34, skipping insertion in model container [2022-11-03 03:47:34,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:34" (3/3) ... [2022-11-03 03:47:34,175 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_arrays_vsaR_p06.c [2022-11-03 03:47:34,193 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:47:34,193 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:47:34,290 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:47:34,304 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;@7fbafc1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:47:34,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:47:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 185 states, 183 states have (on average 1.4972677595628416) internal successors, (274), 184 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:47:34,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:34,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:47:34,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:34,327 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 03:47:34,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:34,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180656804] [2022-11-03 03:47:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:34,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:34,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:34,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:34,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:47:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:34,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:47:34,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:34,821 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 03:47:34,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:34,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:34,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180656804] [2022-11-03 03:47:34,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180656804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:34,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:34,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:47:34,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926916462] [2022-11-03 03:47:34,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:34,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:34,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:34,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:47:34,870 INFO L87 Difference]: Start difference. First operand has 185 states, 183 states have (on average 1.4972677595628416) internal successors, (274), 184 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:35,271 INFO L93 Difference]: Finished difference Result 542 states and 813 transitions. [2022-11-03 03:47:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:35,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 03:47:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:35,285 INFO L225 Difference]: With dead ends: 542 [2022-11-03 03:47:35,286 INFO L226 Difference]: Without dead ends: 359 [2022-11-03 03:47:35,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:35,293 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 525 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:35,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 726 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:47:35,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-03 03:47:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 183. [2022-11-03 03:47:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 270 transitions. [2022-11-03 03:47:35,361 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 270 transitions. Word has length 5 [2022-11-03 03:47:35,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:35,361 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 270 transitions. [2022-11-03 03:47:35,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:35,362 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 270 transitions. [2022-11-03 03:47:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:35,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:35,376 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:35,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:35,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:35,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:35,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:35,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1686520099, now seen corresponding path program 1 times [2022-11-03 03:47:35,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:35,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322697376] [2022-11-03 03:47:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:35,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:35,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:35,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:35,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:47:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:36,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:36,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:36,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:36,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322697376] [2022-11-03 03:47:36,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322697376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:36,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:36,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:36,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725924509] [2022-11-03 03:47:36,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:36,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:36,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:36,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:36,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:36,383 INFO L87 Difference]: Start difference. First operand 183 states and 270 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:36,567 INFO L93 Difference]: Finished difference Result 716 states and 1063 transitions. [2022-11-03 03:47:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:36,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:36,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:36,572 INFO L225 Difference]: With dead ends: 716 [2022-11-03 03:47:36,573 INFO L226 Difference]: Without dead ends: 537 [2022-11-03 03:47:36,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:47:36,578 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 1037 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:36,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 1545 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-03 03:47:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 189. [2022-11-03 03:47:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.4787234042553192) internal successors, (278), 188 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 278 transitions. [2022-11-03 03:47:36,597 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 278 transitions. Word has length 182 [2022-11-03 03:47:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:36,597 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 278 transitions. [2022-11-03 03:47:36,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 278 transitions. [2022-11-03 03:47:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:36,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:36,601 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:36,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:36,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:36,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:36,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1159126049, now seen corresponding path program 1 times [2022-11-03 03:47:36,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:36,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933087867] [2022-11-03 03:47:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:36,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:36,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:36,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:36,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:47:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:37,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:47:37,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:37,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:37,629 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:37,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933087867] [2022-11-03 03:47:37,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933087867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:37,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:37,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:47:37,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679127930] [2022-11-03 03:47:37,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:37,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:47:37,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:37,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:47:37,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:37,633 INFO L87 Difference]: Start difference. First operand 189 states and 278 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:38,152 INFO L93 Difference]: Finished difference Result 724 states and 1072 transitions. [2022-11-03 03:47:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:47:38,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:38,156 INFO L225 Difference]: With dead ends: 724 [2022-11-03 03:47:38,156 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 03:47:38,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:47:38,158 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1299 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 1905 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:38,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 1905 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:47:38,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 03:47:38,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 191. [2022-11-03 03:47:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.4736842105263157) internal successors, (280), 190 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 280 transitions. [2022-11-03 03:47:38,172 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 280 transitions. Word has length 182 [2022-11-03 03:47:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:38,173 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 280 transitions. [2022-11-03 03:47:38,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 280 transitions. [2022-11-03 03:47:38,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:38,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:38,177 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:38,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:38,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:38,395 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash -510533279, now seen corresponding path program 1 times [2022-11-03 03:47:38,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:38,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97113037] [2022-11-03 03:47:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:38,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:38,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:38,400 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:38,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:47:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:38,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:38,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:39,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:39,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:39,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97113037] [2022-11-03 03:47:39,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97113037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:39,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:39,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:47:39,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126267055] [2022-11-03 03:47:39,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:39,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:47:39,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:39,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:47:39,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:39,074 INFO L87 Difference]: Start difference. First operand 191 states and 280 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:39,367 INFO L93 Difference]: Finished difference Result 724 states and 1071 transitions. [2022-11-03 03:47:39,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:47:39,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:39,370 INFO L225 Difference]: With dead ends: 724 [2022-11-03 03:47:39,371 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 03:47:39,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:47:39,379 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 1296 mSDsluCounter, 1760 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:39,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 2018 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:47:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 03:47:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 193. [2022-11-03 03:47:39,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.46875) internal successors, (282), 192 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 282 transitions. [2022-11-03 03:47:39,397 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 282 transitions. Word has length 182 [2022-11-03 03:47:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:39,397 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 282 transitions. [2022-11-03 03:47:39,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 282 transitions. [2022-11-03 03:47:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:39,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:39,406 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:39,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-03 03:47:39,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:39,619 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:39,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:39,620 INFO L85 PathProgramCache]: Analyzing trace with hash -420472989, now seen corresponding path program 1 times [2022-11-03 03:47:39,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:39,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790621511] [2022-11-03 03:47:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:39,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:39,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:39,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:39,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:47:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:40,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:47:40,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:40,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:40,293 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:40,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790621511] [2022-11-03 03:47:40,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790621511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:40,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:40,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:40,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526318279] [2022-11-03 03:47:40,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:40,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:40,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:40,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:40,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:40,301 INFO L87 Difference]: Start difference. First operand 193 states and 282 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:40,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:40,495 INFO L93 Difference]: Finished difference Result 724 states and 1070 transitions. [2022-11-03 03:47:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:40,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:40,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:40,499 INFO L225 Difference]: With dead ends: 724 [2022-11-03 03:47:40,499 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 03:47:40,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:47:40,500 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 1023 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:40,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 1516 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 03:47:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 197. [2022-11-03 03:47:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.4642857142857142) internal successors, (287), 196 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:40,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 287 transitions. [2022-11-03 03:47:40,514 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 287 transitions. Word has length 182 [2022-11-03 03:47:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:40,515 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 287 transitions. [2022-11-03 03:47:40,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 287 transitions. [2022-11-03 03:47:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:40,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:40,519 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:40,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:40,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:40,733 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:40,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:40,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1951243877, now seen corresponding path program 1 times [2022-11-03 03:47:40,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:40,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041281564] [2022-11-03 03:47:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:40,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:40,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:40,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:40,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:47:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:41,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:47:41,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:41,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:41,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:41,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041281564] [2022-11-03 03:47:41,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041281564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:41,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:41,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:47:41,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649779913] [2022-11-03 03:47:41,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:41,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:41,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:41,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:41,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:47:41,389 INFO L87 Difference]: Start difference. First operand 197 states and 287 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:41,638 INFO L93 Difference]: Finished difference Result 715 states and 1058 transitions. [2022-11-03 03:47:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:41,641 INFO L225 Difference]: With dead ends: 715 [2022-11-03 03:47:41,641 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 03:47:41,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 03:47:41,642 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 743 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:41,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 964 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:47:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 03:47:41,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 199. [2022-11-03 03:47:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.4595959595959596) internal successors, (289), 198 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 289 transitions. [2022-11-03 03:47:41,650 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 289 transitions. Word has length 182 [2022-11-03 03:47:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:41,650 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 289 transitions. [2022-11-03 03:47:41,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:41,651 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 289 transitions. [2022-11-03 03:47:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:41,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:41,653 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:41,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:41,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:41,872 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:41,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1845166617, now seen corresponding path program 1 times [2022-11-03 03:47:41,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:41,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635290275] [2022-11-03 03:47:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:41,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:41,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:41,874 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:41,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:47:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:42,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:47:42,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:42,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:42,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:42,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635290275] [2022-11-03 03:47:42,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635290275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:42,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:42,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:42,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266598934] [2022-11-03 03:47:42,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:42,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:42,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:42,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:42,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:42,530 INFO L87 Difference]: Start difference. First operand 199 states and 289 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:42,799 INFO L93 Difference]: Finished difference Result 734 states and 1083 transitions. [2022-11-03 03:47:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:42,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:42,801 INFO L225 Difference]: With dead ends: 734 [2022-11-03 03:47:42,801 INFO L226 Difference]: Without dead ends: 555 [2022-11-03 03:47:42,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:47:42,802 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 1021 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:42,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 1480 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:47:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-03 03:47:42,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 203. [2022-11-03 03:47:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.4554455445544554) internal successors, (294), 202 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 294 transitions. [2022-11-03 03:47:42,809 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 294 transitions. Word has length 182 [2022-11-03 03:47:42,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:42,810 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 294 transitions. [2022-11-03 03:47:42,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 294 transitions. [2022-11-03 03:47:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:42,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:42,812 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:42,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:43,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:43,029 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:43,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1177784727, now seen corresponding path program 1 times [2022-11-03 03:47:43,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:43,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524347769] [2022-11-03 03:47:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:43,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:43,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:43,032 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:43,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:47:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:43,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:47:43,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:43,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:43,639 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:43,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524347769] [2022-11-03 03:47:43,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524347769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:43,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:43,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:43,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001519566] [2022-11-03 03:47:43,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:43,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:43,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:43,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:43,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:43,641 INFO L87 Difference]: Start difference. First operand 203 states and 294 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:43,833 INFO L93 Difference]: Finished difference Result 734 states and 1082 transitions. [2022-11-03 03:47:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:43,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:43,841 INFO L225 Difference]: With dead ends: 734 [2022-11-03 03:47:43,841 INFO L226 Difference]: Without dead ends: 555 [2022-11-03 03:47:43,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:47:43,842 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 1016 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:43,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 1515 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-03 03:47:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 205. [2022-11-03 03:47:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.4509803921568627) internal successors, (296), 204 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 296 transitions. [2022-11-03 03:47:43,849 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 296 transitions. Word has length 182 [2022-11-03 03:47:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:43,850 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 296 transitions. [2022-11-03 03:47:43,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 296 transitions. [2022-11-03 03:47:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:43,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:43,852 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:43,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:44,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:44,070 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:44,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:44,071 INFO L85 PathProgramCache]: Analyzing trace with hash -832956565, now seen corresponding path program 1 times [2022-11-03 03:47:44,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:44,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973260563] [2022-11-03 03:47:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:44,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:44,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:44,073 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:44,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:47:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:44,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:44,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:44,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:44,711 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:44,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973260563] [2022-11-03 03:47:44,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973260563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:44,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:44,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:47:44,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466000769] [2022-11-03 03:47:44,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:44,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:44,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:44,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:44,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:47:44,714 INFO L87 Difference]: Start difference. First operand 205 states and 296 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:44,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:44,819 INFO L93 Difference]: Finished difference Result 715 states and 1055 transitions. [2022-11-03 03:47:44,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:44,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:44,823 INFO L225 Difference]: With dead ends: 715 [2022-11-03 03:47:44,823 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 03:47:44,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 03:47:44,824 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 721 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1028 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 03:47:44,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 1028 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:44,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 03:47:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 207. [2022-11-03 03:47:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4466019417475728) internal successors, (298), 206 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 298 transitions. [2022-11-03 03:47:44,831 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 298 transitions. Word has length 182 [2022-11-03 03:47:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:44,832 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 298 transitions. [2022-11-03 03:47:44,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 298 transitions. [2022-11-03 03:47:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:44,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:44,835 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:44,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:45,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:45,052 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:45,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1692539117, now seen corresponding path program 1 times [2022-11-03 03:47:45,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:45,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114312153] [2022-11-03 03:47:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:45,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:45,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:45,058 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:45,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:47:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:45,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:45,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:45,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:45,717 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:45,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114312153] [2022-11-03 03:47:45,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114312153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:45,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:45,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:45,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938251998] [2022-11-03 03:47:45,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:45,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:45,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:45,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:45,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:45,719 INFO L87 Difference]: Start difference. First operand 207 states and 298 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:45,850 INFO L93 Difference]: Finished difference Result 742 states and 1092 transitions. [2022-11-03 03:47:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:45,853 INFO L225 Difference]: With dead ends: 742 [2022-11-03 03:47:45,853 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 03:47:45,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:47:45,855 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 1017 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1547 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 03:47:45,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 1547 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 03:47:45,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 209. [2022-11-03 03:47:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.4423076923076923) internal successors, (300), 208 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 300 transitions. [2022-11-03 03:47:45,862 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 300 transitions. Word has length 182 [2022-11-03 03:47:45,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:45,863 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 300 transitions. [2022-11-03 03:47:45,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 300 transitions. [2022-11-03 03:47:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:45,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:45,865 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:45,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:46,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:46,080 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:46,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:46,080 INFO L85 PathProgramCache]: Analyzing trace with hash 287347439, now seen corresponding path program 1 times [2022-11-03 03:47:46,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:46,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213177751] [2022-11-03 03:47:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:46,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:46,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:46,083 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:46,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:47:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:46,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:46,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:46,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:46,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213177751] [2022-11-03 03:47:46,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213177751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:46,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:46,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:46,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320150665] [2022-11-03 03:47:46,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:46,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:46,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:46,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:46,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:46,748 INFO L87 Difference]: Start difference. First operand 209 states and 300 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:46,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:46,902 INFO L93 Difference]: Finished difference Result 742 states and 1091 transitions. [2022-11-03 03:47:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:46,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:46,905 INFO L225 Difference]: With dead ends: 742 [2022-11-03 03:47:46,906 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 03:47:46,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:47:46,907 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 1010 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:46,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1010 Valid, 1536 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 03:47:46,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 211. [2022-11-03 03:47:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.438095238095238) internal successors, (302), 210 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 302 transitions. [2022-11-03 03:47:46,916 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 302 transitions. Word has length 182 [2022-11-03 03:47:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:46,916 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 302 transitions. [2022-11-03 03:47:46,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 302 transitions. [2022-11-03 03:47:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:46,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:46,919 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:46,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:47,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:47,137 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:47,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:47,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1733928305, now seen corresponding path program 1 times [2022-11-03 03:47:47,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:47,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887727970] [2022-11-03 03:47:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:47,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:47,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:47,140 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:47,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:47:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:47,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:47,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:47,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:47,819 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:47,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887727970] [2022-11-03 03:47:47,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887727970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:47,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:47,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:47,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446371417] [2022-11-03 03:47:47,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:47,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:47,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:47,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:47,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:47,821 INFO L87 Difference]: Start difference. First operand 211 states and 302 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:48,013 INFO L93 Difference]: Finished difference Result 742 states and 1090 transitions. [2022-11-03 03:47:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:48,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:48,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:48,017 INFO L225 Difference]: With dead ends: 742 [2022-11-03 03:47:48,017 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 03:47:48,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:47:48,018 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 1003 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:48,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1003 Valid, 1513 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:48,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 03:47:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 213. [2022-11-03 03:47:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.4339622641509433) internal successors, (304), 212 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 304 transitions. [2022-11-03 03:47:48,027 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 304 transitions. Word has length 182 [2022-11-03 03:47:48,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:48,027 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 304 transitions. [2022-11-03 03:47:48,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:48,028 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 304 transitions. [2022-11-03 03:47:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:48,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:48,030 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:48,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:48,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:48,247 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:48,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2119790707, now seen corresponding path program 1 times [2022-11-03 03:47:48,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:48,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935709229] [2022-11-03 03:47:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:48,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:48,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:48,250 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:48,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:47:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:48,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:49,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:49,015 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:49,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935709229] [2022-11-03 03:47:49,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935709229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:49,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:49,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:49,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281805581] [2022-11-03 03:47:49,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:49,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:49,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:49,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:49,018 INFO L87 Difference]: Start difference. First operand 213 states and 304 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:49,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:49,173 INFO L93 Difference]: Finished difference Result 742 states and 1089 transitions. [2022-11-03 03:47:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:49,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:49,176 INFO L225 Difference]: With dead ends: 742 [2022-11-03 03:47:49,176 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 03:47:49,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:47:49,177 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 996 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:49,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 1525 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 03:47:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 215. [2022-11-03 03:47:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4299065420560748) internal successors, (306), 214 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 306 transitions. [2022-11-03 03:47:49,186 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 306 transitions. Word has length 182 [2022-11-03 03:47:49,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:49,187 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 306 transitions. [2022-11-03 03:47:49,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 306 transitions. [2022-11-03 03:47:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:49,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:49,191 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:49,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:49,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:49,417 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:49,417 INFO L85 PathProgramCache]: Analyzing trace with hash -244050955, now seen corresponding path program 1 times [2022-11-03 03:47:49,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:49,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648671997] [2022-11-03 03:47:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:49,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:49,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:49,419 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:49,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:47:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:49,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:49,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:50,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:50,104 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:50,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648671997] [2022-11-03 03:47:50,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648671997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:50,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:50,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:50,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849866455] [2022-11-03 03:47:50,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:50,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:50,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:50,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:50,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:50,107 INFO L87 Difference]: Start difference. First operand 215 states and 306 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:50,252 INFO L93 Difference]: Finished difference Result 742 states and 1088 transitions. [2022-11-03 03:47:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:50,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:50,256 INFO L225 Difference]: With dead ends: 742 [2022-11-03 03:47:50,256 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 03:47:50,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:47:50,257 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 989 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:50,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 1527 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 03:47:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 217. [2022-11-03 03:47:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4259259259259258) internal successors, (308), 216 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 308 transitions. [2022-11-03 03:47:50,265 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 308 transitions. Word has length 182 [2022-11-03 03:47:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:50,265 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 308 transitions. [2022-11-03 03:47:50,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 308 transitions. [2022-11-03 03:47:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:50,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:50,267 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:50,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:50,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:50,484 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:50,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1652928503, now seen corresponding path program 1 times [2022-11-03 03:47:50,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:50,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616541974] [2022-11-03 03:47:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:50,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:50,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:50,486 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:50,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:47:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:50,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:50,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:51,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:51,175 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:51,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616541974] [2022-11-03 03:47:51,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616541974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:51,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:51,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:51,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101163969] [2022-11-03 03:47:51,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:51,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:51,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:51,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:51,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:51,177 INFO L87 Difference]: Start difference. First operand 217 states and 308 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:51,333 INFO L93 Difference]: Finished difference Result 716 states and 1050 transitions. [2022-11-03 03:47:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:51,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:51,335 INFO L225 Difference]: With dead ends: 716 [2022-11-03 03:47:51,336 INFO L226 Difference]: Without dead ends: 537 [2022-11-03 03:47:51,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:47:51,339 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 926 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:51,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 1475 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-03 03:47:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 223. [2022-11-03 03:47:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.4234234234234233) internal successors, (316), 222 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 316 transitions. [2022-11-03 03:47:51,347 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 316 transitions. Word has length 182 [2022-11-03 03:47:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:51,348 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 316 transitions. [2022-11-03 03:47:51,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 316 transitions. [2022-11-03 03:47:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:51,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:51,350 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:51,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:51,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:51,553 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:51,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:51,554 INFO L85 PathProgramCache]: Analyzing trace with hash -134941319, now seen corresponding path program 1 times [2022-11-03 03:47:51,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:51,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524509421] [2022-11-03 03:47:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:51,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:51,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:51,556 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:51,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:47:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:52,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:52,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:52,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:52,220 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:52,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524509421] [2022-11-03 03:47:52,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524509421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:52,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:52,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:47:52,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244966170] [2022-11-03 03:47:52,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:52,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:47:52,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:52,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:47:52,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:52,222 INFO L87 Difference]: Start difference. First operand 223 states and 316 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:52,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:52,471 INFO L93 Difference]: Finished difference Result 758 states and 1110 transitions. [2022-11-03 03:47:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:47:52,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:52,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:52,474 INFO L225 Difference]: With dead ends: 758 [2022-11-03 03:47:52,475 INFO L226 Difference]: Without dead ends: 579 [2022-11-03 03:47:52,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:47:52,476 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 1244 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 1958 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:52,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1244 Valid, 1958 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:47:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-11-03 03:47:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 225. [2022-11-03 03:47:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.4196428571428572) internal successors, (318), 224 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 318 transitions. [2022-11-03 03:47:52,483 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 318 transitions. Word has length 182 [2022-11-03 03:47:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:52,483 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 318 transitions. [2022-11-03 03:47:52,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 318 transitions. [2022-11-03 03:47:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:52,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:52,485 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:52,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:52,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:52,702 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:52,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:52,703 INFO L85 PathProgramCache]: Analyzing trace with hash -65293445, now seen corresponding path program 1 times [2022-11-03 03:47:52,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:52,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100216724] [2022-11-03 03:47:52,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:52,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:52,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:52,705 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:52,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:47:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:53,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:53,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:53,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:53,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100216724] [2022-11-03 03:47:53,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100216724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:53,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:53,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:53,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594091108] [2022-11-03 03:47:53,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:53,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:53,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:53,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:53,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:53,285 INFO L87 Difference]: Start difference. First operand 225 states and 318 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:53,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:53,418 INFO L93 Difference]: Finished difference Result 716 states and 1048 transitions. [2022-11-03 03:47:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:53,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:53,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:53,421 INFO L225 Difference]: With dead ends: 716 [2022-11-03 03:47:53,421 INFO L226 Difference]: Without dead ends: 537 [2022-11-03 03:47:53,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:47:53,423 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 912 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:53,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [912 Valid, 1474 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-03 03:47:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 227. [2022-11-03 03:47:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.415929203539823) internal successors, (320), 226 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 320 transitions. [2022-11-03 03:47:53,431 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 320 transitions. Word has length 182 [2022-11-03 03:47:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:53,431 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 320 transitions. [2022-11-03 03:47:53,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 320 transitions. [2022-11-03 03:47:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:53,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:53,433 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:53,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:53,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:53,647 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1333660157, now seen corresponding path program 1 times [2022-11-03 03:47:53,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:53,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35347468] [2022-11-03 03:47:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:53,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:53,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:53,650 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:53,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:47:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:54,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:47:54,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:54,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:54,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:54,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35347468] [2022-11-03 03:47:54,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35347468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:54,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:54,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:47:54,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189344983] [2022-11-03 03:47:54,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:54,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:47:54,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:54,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:47:54,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:54,330 INFO L87 Difference]: Start difference. First operand 227 states and 320 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:54,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:54,760 INFO L93 Difference]: Finished difference Result 724 states and 1057 transitions. [2022-11-03 03:47:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:47:54,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:54,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:54,763 INFO L225 Difference]: With dead ends: 724 [2022-11-03 03:47:54,764 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 03:47:54,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:47:54,765 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 1159 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:54,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1159 Valid, 1779 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:47:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 03:47:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 229. [2022-11-03 03:47:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.412280701754386) internal successors, (322), 228 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 322 transitions. [2022-11-03 03:47:54,772 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 322 transitions. Word has length 182 [2022-11-03 03:47:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:54,773 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 322 transitions. [2022-11-03 03:47:54,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 322 transitions. [2022-11-03 03:47:54,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:54,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:54,775 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:54,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:54,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:54,987 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:54,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1697126655, now seen corresponding path program 1 times [2022-11-03 03:47:54,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:54,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071665102] [2022-11-03 03:47:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:54,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:54,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:54,990 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:54,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:47:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:55,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:55,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:55,551 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:55,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071665102] [2022-11-03 03:47:55,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071665102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:55,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:55,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:47:55,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040153757] [2022-11-03 03:47:55,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:55,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:47:55,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:55,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:47:55,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:55,554 INFO L87 Difference]: Start difference. First operand 229 states and 322 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:55,772 INFO L93 Difference]: Finished difference Result 724 states and 1056 transitions. [2022-11-03 03:47:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:47:55,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:55,775 INFO L225 Difference]: With dead ends: 724 [2022-11-03 03:47:55,775 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 03:47:55,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:47:55,776 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 1156 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:55,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 1890 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:47:55,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 03:47:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 231. [2022-11-03 03:47:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.4086956521739131) internal successors, (324), 230 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 324 transitions. [2022-11-03 03:47:55,784 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 324 transitions. Word has length 182 [2022-11-03 03:47:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:55,785 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 324 transitions. [2022-11-03 03:47:55,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 324 transitions. [2022-11-03 03:47:55,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:55,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:55,786 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:55,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:56,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:56,004 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:56,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:56,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1152254081, now seen corresponding path program 1 times [2022-11-03 03:47:56,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:56,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945075649] [2022-11-03 03:47:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:56,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:56,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:56,006 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:56,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 03:47:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:56,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:47:56,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:56,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:56,777 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:56,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945075649] [2022-11-03 03:47:56,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945075649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:56,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:56,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:47:56,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371334702] [2022-11-03 03:47:56,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:56,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:47:56,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:56,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:47:56,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:56,779 INFO L87 Difference]: Start difference. First operand 231 states and 324 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:56,968 INFO L93 Difference]: Finished difference Result 412 states and 593 transitions. [2022-11-03 03:47:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:56,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:56,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:56,972 INFO L225 Difference]: With dead ends: 412 [2022-11-03 03:47:56,972 INFO L226 Difference]: Without dead ends: 233 [2022-11-03 03:47:56,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:47:56,974 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 26 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:56,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1244 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-03 03:47:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-03 03:47:56,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-11-03 03:47:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.4051724137931034) internal successors, (326), 232 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 326 transitions. [2022-11-03 03:47:56,984 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 326 transitions. Word has length 182 [2022-11-03 03:47:56,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:56,984 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 326 transitions. [2022-11-03 03:47:56,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 326 transitions. [2022-11-03 03:47:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:56,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:56,986 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:57,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:57,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:57,204 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:57,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:57,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2100306047, now seen corresponding path program 1 times [2022-11-03 03:47:57,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:57,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181911184] [2022-11-03 03:47:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:57,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:57,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:57,206 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:57,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:47:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:57,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:47:57,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:57,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:57,899 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:57,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181911184] [2022-11-03 03:47:57,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181911184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:57,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:57,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:57,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229391248] [2022-11-03 03:47:57,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:57,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:57,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:57,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:57,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:57,902 INFO L87 Difference]: Start difference. First operand 233 states and 326 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:58,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:58,092 INFO L93 Difference]: Finished difference Result 742 states and 1081 transitions. [2022-11-03 03:47:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:58,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:58,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:58,095 INFO L225 Difference]: With dead ends: 742 [2022-11-03 03:47:58,095 INFO L226 Difference]: Without dead ends: 563 [2022-11-03 03:47:58,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:47:58,098 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 930 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:58,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 1468 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:47:58,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-03 03:47:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 235. [2022-11-03 03:47:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.4017094017094016) internal successors, (328), 234 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 328 transitions. [2022-11-03 03:47:58,107 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 328 transitions. Word has length 182 [2022-11-03 03:47:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:58,107 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 328 transitions. [2022-11-03 03:47:58,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 328 transitions. [2022-11-03 03:47:58,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:58,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:58,109 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:58,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-03 03:47:58,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:58,327 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:58,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:58,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1665800449, now seen corresponding path program 1 times [2022-11-03 03:47:58,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:58,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650440432] [2022-11-03 03:47:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:58,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:58,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:58,329 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:58,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:47:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:58,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:47:58,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:59,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:59,030 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:59,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650440432] [2022-11-03 03:47:59,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650440432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:59,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:59,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:47:59,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955077729] [2022-11-03 03:47:59,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:59,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:59,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:47:59,032 INFO L87 Difference]: Start difference. First operand 235 states and 328 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:59,264 INFO L93 Difference]: Finished difference Result 715 states and 1042 transitions. [2022-11-03 03:47:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:59,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:47:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:59,269 INFO L225 Difference]: With dead ends: 715 [2022-11-03 03:47:59,269 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 03:47:59,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 03:47:59,270 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 632 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:59,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 948 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:47:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 03:47:59,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 237. [2022-11-03 03:47:59,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.3983050847457628) internal successors, (330), 236 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 330 transitions. [2022-11-03 03:47:59,278 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 330 transitions. Word has length 182 [2022-11-03 03:47:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:59,278 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 330 transitions. [2022-11-03 03:47:59,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 330 transitions. [2022-11-03 03:47:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:59,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:59,280 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:59,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:59,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:59,497 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:59,497 INFO L85 PathProgramCache]: Analyzing trace with hash 959203843, now seen corresponding path program 1 times [2022-11-03 03:47:59,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:59,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877131412] [2022-11-03 03:47:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:59,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:59,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:59,500 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:59,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:47:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:59,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:47:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:00,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:00,175 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:00,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877131412] [2022-11-03 03:48:00,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877131412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:00,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:00,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:00,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513246495] [2022-11-03 03:48:00,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:00,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:00,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:00,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:00,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:00,177 INFO L87 Difference]: Start difference. First operand 237 states and 330 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:00,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:00,451 INFO L93 Difference]: Finished difference Result 772 states and 1124 transitions. [2022-11-03 03:48:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:00,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:00,454 INFO L225 Difference]: With dead ends: 772 [2022-11-03 03:48:00,454 INFO L226 Difference]: Without dead ends: 593 [2022-11-03 03:48:00,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:00,455 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 972 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:00,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 1464 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-03 03:48:00,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 239. [2022-11-03 03:48:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.3949579831932772) internal successors, (332), 238 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 332 transitions. [2022-11-03 03:48:00,464 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 332 transitions. Word has length 182 [2022-11-03 03:48:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:00,464 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 332 transitions. [2022-11-03 03:48:00,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 332 transitions. [2022-11-03 03:48:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:00,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:00,466 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:00,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 03:48:00,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:00,683 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:00,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1821037445, now seen corresponding path program 1 times [2022-11-03 03:48:00,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:00,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823427125] [2022-11-03 03:48:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:00,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:00,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:00,686 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:00,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:48:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:01,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:48:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:01,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:01,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:01,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823427125] [2022-11-03 03:48:01,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823427125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:01,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:01,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:01,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330232856] [2022-11-03 03:48:01,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:01,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:01,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:01,417 INFO L87 Difference]: Start difference. First operand 239 states and 332 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:01,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:01,677 INFO L93 Difference]: Finished difference Result 772 states and 1123 transitions. [2022-11-03 03:48:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:01,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:01,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:01,680 INFO L225 Difference]: With dead ends: 772 [2022-11-03 03:48:01,681 INFO L226 Difference]: Without dead ends: 593 [2022-11-03 03:48:01,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:01,682 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 965 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:01,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [965 Valid, 1460 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:01,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-03 03:48:01,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 241. [2022-11-03 03:48:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.3916666666666666) internal successors, (334), 240 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 334 transitions. [2022-11-03 03:48:01,695 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 334 transitions. Word has length 182 [2022-11-03 03:48:01,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:01,695 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 334 transitions. [2022-11-03 03:48:01,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:01,695 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 334 transitions. [2022-11-03 03:48:01,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:01,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:01,697 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:01,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:01,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:01,915 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:01,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1985882745, now seen corresponding path program 1 times [2022-11-03 03:48:01,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:01,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647386889] [2022-11-03 03:48:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:01,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:01,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:01,918 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:01,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:48:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:02,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:02,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:02,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:02,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:02,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647386889] [2022-11-03 03:48:02,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647386889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:02,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:02,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:02,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109352706] [2022-11-03 03:48:02,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:02,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:02,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:02,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:02,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:02,610 INFO L87 Difference]: Start difference. First operand 241 states and 334 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:02,780 INFO L93 Difference]: Finished difference Result 772 states and 1122 transitions. [2022-11-03 03:48:02,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:02,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:02,799 INFO L225 Difference]: With dead ends: 772 [2022-11-03 03:48:02,800 INFO L226 Difference]: Without dead ends: 593 [2022-11-03 03:48:02,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:02,802 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 960 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:02,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [960 Valid, 1496 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-03 03:48:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 243. [2022-11-03 03:48:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.3884297520661157) internal successors, (336), 242 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 336 transitions. [2022-11-03 03:48:02,816 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 336 transitions. Word has length 182 [2022-11-03 03:48:02,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:02,817 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 336 transitions. [2022-11-03 03:48:02,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 336 transitions. [2022-11-03 03:48:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:02,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:02,818 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:02,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:03,035 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1026912265, now seen corresponding path program 1 times [2022-11-03 03:48:03,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:03,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621403148] [2022-11-03 03:48:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:03,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:03,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:03,038 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:03,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:48:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:03,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:03,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:03,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:03,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:03,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621403148] [2022-11-03 03:48:03,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621403148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:03,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:03,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:03,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142425294] [2022-11-03 03:48:03,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:03,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:03,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:03,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:03,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:03,771 INFO L87 Difference]: Start difference. First operand 243 states and 336 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:03,954 INFO L93 Difference]: Finished difference Result 780 states and 1133 transitions. [2022-11-03 03:48:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:03,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:03,956 INFO L225 Difference]: With dead ends: 780 [2022-11-03 03:48:03,956 INFO L226 Difference]: Without dead ends: 601 [2022-11-03 03:48:03,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:03,957 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 959 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:03,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 1497 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:03,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-03 03:48:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 249. [2022-11-03 03:48:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.3870967741935485) internal successors, (344), 248 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 344 transitions. [2022-11-03 03:48:03,968 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 344 transitions. Word has length 182 [2022-11-03 03:48:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:03,968 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 344 transitions. [2022-11-03 03:48:03,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 344 transitions. [2022-11-03 03:48:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:03,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:03,970 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:03,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 03:48:04,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:04,187 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:04,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1540910069, now seen corresponding path program 1 times [2022-11-03 03:48:04,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:04,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911704448] [2022-11-03 03:48:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:04,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:04,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:04,190 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:04,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:48:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:04,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:48:04,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:04,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:04,880 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:04,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911704448] [2022-11-03 03:48:04,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911704448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:04,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:04,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:48:04,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492846549] [2022-11-03 03:48:04,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:04,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:48:04,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:04,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:48:04,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:04,882 INFO L87 Difference]: Start difference. First operand 249 states and 344 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:05,014 INFO L93 Difference]: Finished difference Result 608 states and 877 transitions. [2022-11-03 03:48:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:48:05,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:05,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:05,016 INFO L225 Difference]: With dead ends: 608 [2022-11-03 03:48:05,016 INFO L226 Difference]: Without dead ends: 429 [2022-11-03 03:48:05,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 03:48:05,018 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 433 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:05,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 832 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-03 03:48:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 251. [2022-11-03 03:48:05,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.384) internal successors, (346), 250 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 346 transitions. [2022-11-03 03:48:05,025 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 346 transitions. Word has length 182 [2022-11-03 03:48:05,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:05,025 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 346 transitions. [2022-11-03 03:48:05,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 346 transitions. [2022-11-03 03:48:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:05,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:05,027 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:05,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-03 03:48:05,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:05,235 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:05,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:05,236 INFO L85 PathProgramCache]: Analyzing trace with hash 106452873, now seen corresponding path program 1 times [2022-11-03 03:48:05,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:05,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687570187] [2022-11-03 03:48:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:05,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:05,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:05,238 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:05,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:48:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:05,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:48:05,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:05,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:05,854 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:05,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687570187] [2022-11-03 03:48:05,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687570187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:05,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:05,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:48:05,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863315260] [2022-11-03 03:48:05,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:05,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:48:05,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:05,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:48:05,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:05,856 INFO L87 Difference]: Start difference. First operand 251 states and 346 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:05,929 INFO L93 Difference]: Finished difference Result 715 states and 1036 transitions. [2022-11-03 03:48:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:48:05,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:05,931 INFO L225 Difference]: With dead ends: 715 [2022-11-03 03:48:05,931 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 03:48:05,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 03:48:05,932 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 587 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:05,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1012 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 03:48:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 253. [2022-11-03 03:48:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.380952380952381) internal successors, (348), 252 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 348 transitions. [2022-11-03 03:48:05,941 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 348 transitions. Word has length 182 [2022-11-03 03:48:05,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:05,942 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 348 transitions. [2022-11-03 03:48:05,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 348 transitions. [2022-11-03 03:48:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:05,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:05,943 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:05,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 03:48:06,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:06,161 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:06,161 INFO L85 PathProgramCache]: Analyzing trace with hash -932131701, now seen corresponding path program 1 times [2022-11-03 03:48:06,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:06,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689375095] [2022-11-03 03:48:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:06,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:06,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:06,163 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:06,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:48:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:06,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:48:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:06,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:06,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:06,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689375095] [2022-11-03 03:48:06,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689375095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:06,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:06,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:06,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004271188] [2022-11-03 03:48:06,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:06,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:06,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:06,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:06,748 INFO L87 Difference]: Start difference. First operand 253 states and 348 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:06,881 INFO L93 Difference]: Finished difference Result 716 states and 1036 transitions. [2022-11-03 03:48:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:06,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:06,886 INFO L225 Difference]: With dead ends: 716 [2022-11-03 03:48:06,886 INFO L226 Difference]: Without dead ends: 537 [2022-11-03 03:48:06,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:06,888 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 818 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:06,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 1420 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:06,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-03 03:48:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 255. [2022-11-03 03:48:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.3779527559055118) internal successors, (350), 254 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 350 transitions. [2022-11-03 03:48:06,904 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 350 transitions. Word has length 182 [2022-11-03 03:48:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:06,905 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 350 transitions. [2022-11-03 03:48:06,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 350 transitions. [2022-11-03 03:48:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:06,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:06,906 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:06,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:07,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:07,125 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:07,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1220975117, now seen corresponding path program 1 times [2022-11-03 03:48:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:07,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726767216] [2022-11-03 03:48:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:07,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:07,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:07,127 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:07,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:48:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:07,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:07,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:07,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:07,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:07,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726767216] [2022-11-03 03:48:07,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726767216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:07,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:07,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:07,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351768551] [2022-11-03 03:48:07,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:07,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:07,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:07,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:07,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:07,852 INFO L87 Difference]: Start difference. First operand 255 states and 350 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:08,040 INFO L93 Difference]: Finished difference Result 788 states and 1141 transitions. [2022-11-03 03:48:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:08,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:08,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:08,046 INFO L225 Difference]: With dead ends: 788 [2022-11-03 03:48:08,046 INFO L226 Difference]: Without dead ends: 609 [2022-11-03 03:48:08,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:08,048 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 945 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:08,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 1491 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-11-03 03:48:08,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 257. [2022-11-03 03:48:08,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.375) internal successors, (352), 256 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 352 transitions. [2022-11-03 03:48:08,057 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 352 transitions. Word has length 182 [2022-11-03 03:48:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:08,057 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 352 transitions. [2022-11-03 03:48:08,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 352 transitions. [2022-11-03 03:48:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:08,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:08,059 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:08,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:08,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:08,276 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:08,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1339416591, now seen corresponding path program 1 times [2022-11-03 03:48:08,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:08,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374187103] [2022-11-03 03:48:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:08,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:08,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:08,279 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:08,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 03:48:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:08,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:09,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:09,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:09,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374187103] [2022-11-03 03:48:09,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374187103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:09,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:09,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:48:09,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716203229] [2022-11-03 03:48:09,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:09,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:48:09,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:48:09,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:09,232 INFO L87 Difference]: Start difference. First operand 257 states and 352 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:09,367 INFO L93 Difference]: Finished difference Result 715 states and 1033 transitions. [2022-11-03 03:48:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:48:09,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:09,369 INFO L225 Difference]: With dead ends: 715 [2022-11-03 03:48:09,369 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 03:48:09,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 03:48:09,370 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 568 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:09,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 990 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 03:48:09,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 259. [2022-11-03 03:48:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.372093023255814) internal successors, (354), 258 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 354 transitions. [2022-11-03 03:48:09,378 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 354 transitions. Word has length 182 [2022-11-03 03:48:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:09,379 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 354 transitions. [2022-11-03 03:48:09,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 354 transitions. [2022-11-03 03:48:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:09,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:09,381 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:09,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:09,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:09,598 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:09,599 INFO L85 PathProgramCache]: Analyzing trace with hash -693977455, now seen corresponding path program 1 times [2022-11-03 03:48:09,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:09,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674073166] [2022-11-03 03:48:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:09,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:09,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:09,601 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:09,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 03:48:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:10,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:48:10,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:10,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:10,253 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:10,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674073166] [2022-11-03 03:48:10,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674073166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:10,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:10,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:48:10,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285422710] [2022-11-03 03:48:10,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:10,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:10,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:10,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:10,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:10,255 INFO L87 Difference]: Start difference. First operand 259 states and 354 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:10,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:10,657 INFO L93 Difference]: Finished difference Result 724 states and 1043 transitions. [2022-11-03 03:48:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:48:10,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:10,660 INFO L225 Difference]: With dead ends: 724 [2022-11-03 03:48:10,660 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 03:48:10,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:10,661 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 1037 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:10,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 1671 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:48:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 03:48:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 261. [2022-11-03 03:48:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.3692307692307693) internal successors, (356), 260 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 356 transitions. [2022-11-03 03:48:10,669 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 356 transitions. Word has length 182 [2022-11-03 03:48:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:10,669 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 356 transitions. [2022-11-03 03:48:10,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 356 transitions. [2022-11-03 03:48:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:10,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:10,671 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:10,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:10,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:10,888 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:10,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2001119853, now seen corresponding path program 1 times [2022-11-03 03:48:10,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:10,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934944846] [2022-11-03 03:48:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:10,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:10,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:10,891 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:10,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:48:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:11,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:48:11,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:11,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:11,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:11,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934944846] [2022-11-03 03:48:11,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934944846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:11,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:11,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:48:11,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174296964] [2022-11-03 03:48:11,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:11,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:11,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:11,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:11,492 INFO L87 Difference]: Start difference. First operand 261 states and 356 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:11,704 INFO L93 Difference]: Finished difference Result 724 states and 1042 transitions. [2022-11-03 03:48:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:48:11,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:11,707 INFO L225 Difference]: With dead ends: 724 [2022-11-03 03:48:11,707 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 03:48:11,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:11,708 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 1034 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:11,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 1782 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 03:48:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 263. [2022-11-03 03:48:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.366412213740458) internal successors, (358), 262 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 358 transitions. [2022-11-03 03:48:11,716 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 358 transitions. Word has length 182 [2022-11-03 03:48:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:11,717 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 358 transitions. [2022-11-03 03:48:11,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:11,717 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 358 transitions. [2022-11-03 03:48:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:11,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:11,718 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:11,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:11,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:11,936 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash -970078955, now seen corresponding path program 1 times [2022-11-03 03:48:11,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:11,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787769513] [2022-11-03 03:48:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:11,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:11,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:11,938 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:11,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 03:48:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:12,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:12,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:13,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:13,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:13,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787769513] [2022-11-03 03:48:13,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787769513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:13,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:13,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:13,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695017956] [2022-11-03 03:48:13,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:13,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:13,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:13,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:13,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:13,012 INFO L87 Difference]: Start difference. First operand 263 states and 358 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:13,214 INFO L93 Difference]: Finished difference Result 794 states and 1146 transitions. [2022-11-03 03:48:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:13,216 INFO L225 Difference]: With dead ends: 794 [2022-11-03 03:48:13,216 INFO L226 Difference]: Without dead ends: 615 [2022-11-03 03:48:13,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:13,217 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 921 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:13,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 1480 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-03 03:48:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 267. [2022-11-03 03:48:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.3646616541353382) internal successors, (363), 266 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 363 transitions. [2022-11-03 03:48:13,225 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 363 transitions. Word has length 182 [2022-11-03 03:48:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:13,225 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 363 transitions. [2022-11-03 03:48:13,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 363 transitions. [2022-11-03 03:48:13,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:13,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:13,227 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:13,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 03:48:13,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:13,445 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:13,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:13,446 INFO L85 PathProgramCache]: Analyzing trace with hash 381306263, now seen corresponding path program 1 times [2022-11-03 03:48:13,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:13,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005172785] [2022-11-03 03:48:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:13,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:13,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:13,448 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:13,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 03:48:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:13,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:48:13,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:14,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:14,163 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005172785] [2022-11-03 03:48:14,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005172785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:14,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:14,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:48:14,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802630967] [2022-11-03 03:48:14,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:14,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:14,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:14,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:14,166 INFO L87 Difference]: Start difference. First operand 267 states and 363 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:14,591 INFO L93 Difference]: Finished difference Result 724 states and 1040 transitions. [2022-11-03 03:48:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:48:14,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:14,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:14,595 INFO L225 Difference]: With dead ends: 724 [2022-11-03 03:48:14,595 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 03:48:14,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:14,596 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1003 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:14,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1003 Valid, 1639 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:48:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 03:48:14,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 271. [2022-11-03 03:48:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.362962962962963) internal successors, (368), 270 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 368 transitions. [2022-11-03 03:48:14,605 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 368 transitions. Word has length 182 [2022-11-03 03:48:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:14,605 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 368 transitions. [2022-11-03 03:48:14,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:14,606 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 368 transitions. [2022-11-03 03:48:14,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:14,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:14,608 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:14,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:14,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:14,828 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:14,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:14,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1559275751, now seen corresponding path program 1 times [2022-11-03 03:48:14,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:14,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819896062] [2022-11-03 03:48:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:14,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:14,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:14,831 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:14,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 03:48:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:15,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:48:15,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:15,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:15,468 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:15,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819896062] [2022-11-03 03:48:15,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819896062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:15,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:15,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:48:15,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321688128] [2022-11-03 03:48:15,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:15,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:15,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:15,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:15,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:15,470 INFO L87 Difference]: Start difference. First operand 271 states and 368 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:15,677 INFO L93 Difference]: Finished difference Result 724 states and 1039 transitions. [2022-11-03 03:48:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:48:15,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:15,679 INFO L225 Difference]: With dead ends: 724 [2022-11-03 03:48:15,679 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 03:48:15,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:15,680 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 1000 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:15,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1000 Valid, 1749 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 03:48:15,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 273. [2022-11-03 03:48:15,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.3602941176470589) internal successors, (370), 272 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:15,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 370 transitions. [2022-11-03 03:48:15,688 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 370 transitions. Word has length 182 [2022-11-03 03:48:15,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:15,688 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 370 transitions. [2022-11-03 03:48:15,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:15,689 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 370 transitions. [2022-11-03 03:48:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:15,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:15,690 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:15,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:15,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:15,908 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:15,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1964957979, now seen corresponding path program 1 times [2022-11-03 03:48:15,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:15,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717704474] [2022-11-03 03:48:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:15,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:15,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:15,911 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:15,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 03:48:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:16,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:16,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:16,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:16,665 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:16,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717704474] [2022-11-03 03:48:16,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717704474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:16,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:16,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:16,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103607892] [2022-11-03 03:48:16,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:16,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:16,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:16,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:16,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:16,667 INFO L87 Difference]: Start difference. First operand 273 states and 370 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:16,867 INFO L93 Difference]: Finished difference Result 802 states and 1155 transitions. [2022-11-03 03:48:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:16,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:16,870 INFO L225 Difference]: With dead ends: 802 [2022-11-03 03:48:16,870 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 03:48:16,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:16,871 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 913 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:16,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 1472 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 03:48:16,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 275. [2022-11-03 03:48:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.3576642335766422) internal successors, (372), 274 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 372 transitions. [2022-11-03 03:48:16,879 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 372 transitions. Word has length 182 [2022-11-03 03:48:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:16,882 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 372 transitions. [2022-11-03 03:48:16,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:16,883 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 372 transitions. [2022-11-03 03:48:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:16,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:16,884 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:16,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:17,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:17,095 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:17,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1378681757, now seen corresponding path program 1 times [2022-11-03 03:48:17,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:17,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653323480] [2022-11-03 03:48:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:17,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:17,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:17,107 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:17,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 03:48:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:17,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:17,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:18,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:18,182 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:18,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653323480] [2022-11-03 03:48:18,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653323480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:18,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:18,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:48:18,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922189715] [2022-11-03 03:48:18,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:18,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:48:18,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:18,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:48:18,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:18,184 INFO L87 Difference]: Start difference. First operand 275 states and 372 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:18,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:18,324 INFO L93 Difference]: Finished difference Result 715 states and 1026 transitions. [2022-11-03 03:48:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:48:18,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:18,327 INFO L225 Difference]: With dead ends: 715 [2022-11-03 03:48:18,327 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 03:48:18,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 03:48:18,328 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 516 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:18,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 983 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 03:48:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 277. [2022-11-03 03:48:18,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.355072463768116) internal successors, (374), 276 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 374 transitions. [2022-11-03 03:48:18,334 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 374 transitions. Word has length 182 [2022-11-03 03:48:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:18,335 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 374 transitions. [2022-11-03 03:48:18,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 374 transitions. [2022-11-03 03:48:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:18,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:18,336 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:18,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 03:48:18,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:18,543 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1039802721, now seen corresponding path program 1 times [2022-11-03 03:48:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:18,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487989714] [2022-11-03 03:48:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:18,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:18,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:18,546 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:18,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 03:48:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:18,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:48:19,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:19,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:19,168 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:19,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487989714] [2022-11-03 03:48:19,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487989714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:19,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:19,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:48:19,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581602273] [2022-11-03 03:48:19,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:19,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:19,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:19,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:19,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:19,171 INFO L87 Difference]: Start difference. First operand 277 states and 374 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:19,369 INFO L93 Difference]: Finished difference Result 724 states and 1036 transitions. [2022-11-03 03:48:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:48:19,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:19,372 INFO L225 Difference]: With dead ends: 724 [2022-11-03 03:48:19,372 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 03:48:19,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:19,373 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 976 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:19,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1728 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:19,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 03:48:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 279. [2022-11-03 03:48:19,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.3525179856115108) internal successors, (376), 278 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:19,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 376 transitions. [2022-11-03 03:48:19,381 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 376 transitions. Word has length 182 [2022-11-03 03:48:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:19,381 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 376 transitions. [2022-11-03 03:48:19,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 376 transitions. [2022-11-03 03:48:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:19,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:19,383 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:19,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:19,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:19,601 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:19,601 INFO L85 PathProgramCache]: Analyzing trace with hash 285053473, now seen corresponding path program 1 times [2022-11-03 03:48:19,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:19,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406819095] [2022-11-03 03:48:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:19,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:19,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:19,603 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:19,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 03:48:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:20,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:20,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:20,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:20,374 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:20,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406819095] [2022-11-03 03:48:20,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406819095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:20,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:20,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:20,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473461442] [2022-11-03 03:48:20,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:20,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:20,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:20,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:20,376 INFO L87 Difference]: Start difference. First operand 279 states and 376 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:20,574 INFO L93 Difference]: Finished difference Result 812 states and 1167 transitions. [2022-11-03 03:48:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:20,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:20,578 INFO L225 Difference]: With dead ends: 812 [2022-11-03 03:48:20,578 INFO L226 Difference]: Without dead ends: 633 [2022-11-03 03:48:20,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:20,579 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 911 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:20,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 1474 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-03 03:48:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 281. [2022-11-03 03:48:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.35) internal successors, (378), 280 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 378 transitions. [2022-11-03 03:48:20,586 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 378 transitions. Word has length 182 [2022-11-03 03:48:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:20,587 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 378 transitions. [2022-11-03 03:48:20,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 378 transitions. [2022-11-03 03:48:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:20,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:20,588 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:20,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:20,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:20,805 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:20,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:20,806 INFO L85 PathProgramCache]: Analyzing trace with hash -772784605, now seen corresponding path program 1 times [2022-11-03 03:48:20,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:20,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778010143] [2022-11-03 03:48:20,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:20,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:20,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:20,808 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:20,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 03:48:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:21,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:21,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:21,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:21,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778010143] [2022-11-03 03:48:21,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778010143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:21,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:21,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:21,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826701425] [2022-11-03 03:48:21,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:21,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:21,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:21,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:21,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:21,832 INFO L87 Difference]: Start difference. First operand 281 states and 378 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:22,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:22,027 INFO L93 Difference]: Finished difference Result 812 states and 1166 transitions. [2022-11-03 03:48:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:22,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:22,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:22,029 INFO L225 Difference]: With dead ends: 812 [2022-11-03 03:48:22,029 INFO L226 Difference]: Without dead ends: 633 [2022-11-03 03:48:22,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:22,030 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 897 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:22,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [897 Valid, 1482 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-03 03:48:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 285. [2022-11-03 03:48:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.3485915492957747) internal successors, (383), 284 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 383 transitions. [2022-11-03 03:48:22,038 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 383 transitions. Word has length 182 [2022-11-03 03:48:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:22,038 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 383 transitions. [2022-11-03 03:48:22,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 383 transitions. [2022-11-03 03:48:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:22,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:22,040 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:22,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:22,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:22,257 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:22,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash -745719003, now seen corresponding path program 1 times [2022-11-03 03:48:22,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:22,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663546490] [2022-11-03 03:48:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:22,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:22,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:22,260 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:22,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 03:48:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:22,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:48:22,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:22,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:22,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:22,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663546490] [2022-11-03 03:48:22,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663546490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:22,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:22,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:48:22,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199054234] [2022-11-03 03:48:22,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:22,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:22,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:22,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:22,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:22,864 INFO L87 Difference]: Start difference. First operand 285 states and 383 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:23,086 INFO L93 Difference]: Finished difference Result 724 states and 1033 transitions. [2022-11-03 03:48:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:48:23,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:23,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:23,089 INFO L225 Difference]: With dead ends: 724 [2022-11-03 03:48:23,089 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 03:48:23,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:23,090 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 947 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:23,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 1701 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:23,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 03:48:23,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 287. [2022-11-03 03:48:23,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.3461538461538463) internal successors, (385), 286 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 385 transitions. [2022-11-03 03:48:23,094 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 385 transitions. Word has length 182 [2022-11-03 03:48:23,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:23,095 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 385 transitions. [2022-11-03 03:48:23,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 385 transitions. [2022-11-03 03:48:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:23,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:23,096 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:23,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-03 03:48:23,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:23,296 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:23,297 INFO L85 PathProgramCache]: Analyzing trace with hash 988385447, now seen corresponding path program 1 times [2022-11-03 03:48:23,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:23,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103793370] [2022-11-03 03:48:23,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:23,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:23,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:23,299 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:23,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 03:48:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:23,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:23,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:24,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:24,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:24,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103793370] [2022-11-03 03:48:24,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103793370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:24,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:24,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:24,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943788444] [2022-11-03 03:48:24,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:24,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:24,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:24,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:24,069 INFO L87 Difference]: Start difference. First operand 287 states and 385 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:24,251 INFO L93 Difference]: Finished difference Result 820 states and 1176 transitions. [2022-11-03 03:48:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:24,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:24,256 INFO L225 Difference]: With dead ends: 820 [2022-11-03 03:48:24,256 INFO L226 Difference]: Without dead ends: 641 [2022-11-03 03:48:24,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:24,257 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 900 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:24,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 1470 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-11-03 03:48:24,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 289. [2022-11-03 03:48:24,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.34375) internal successors, (387), 288 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:24,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 387 transitions. [2022-11-03 03:48:24,265 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 387 transitions. Word has length 182 [2022-11-03 03:48:24,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:24,265 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 387 transitions. [2022-11-03 03:48:24,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:24,266 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 387 transitions. [2022-11-03 03:48:24,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:24,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:24,267 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:24,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:24,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:24,484 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash -922657111, now seen corresponding path program 1 times [2022-11-03 03:48:24,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:24,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790085590] [2022-11-03 03:48:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:24,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:24,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:24,487 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:24,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 03:48:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:48:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:25,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:25,382 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:25,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790085590] [2022-11-03 03:48:25,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790085590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:25,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:25,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:48:25,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526193093] [2022-11-03 03:48:25,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:25,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:48:25,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:25,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:48:25,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:48:25,384 INFO L87 Difference]: Start difference. First operand 289 states and 387 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:26,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:26,293 INFO L93 Difference]: Finished difference Result 1254 states and 1807 transitions. [2022-11-03 03:48:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:48:26,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:26,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:26,297 INFO L225 Difference]: With dead ends: 1254 [2022-11-03 03:48:26,297 INFO L226 Difference]: Without dead ends: 1075 [2022-11-03 03:48:26,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:48:26,299 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 2627 mSDsluCounter, 3534 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2627 SdHoareTripleChecker+Valid, 3898 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:26,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2627 Valid, 3898 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:48:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-11-03 03:48:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 339. [2022-11-03 03:48:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.334319526627219) internal successors, (451), 338 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 451 transitions. [2022-11-03 03:48:26,310 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 451 transitions. Word has length 182 [2022-11-03 03:48:26,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:26,310 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 451 transitions. [2022-11-03 03:48:26,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:26,310 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 451 transitions. [2022-11-03 03:48:26,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:26,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:26,312 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:26,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-03 03:48:26,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:26,529 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:26,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:26,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1890007765, now seen corresponding path program 1 times [2022-11-03 03:48:26,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:26,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084952951] [2022-11-03 03:48:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:26,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:26,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:26,533 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:26,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 03:48:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:26,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:26,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:27,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:27,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:27,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084952951] [2022-11-03 03:48:27,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084952951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:27,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:27,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:27,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663006203] [2022-11-03 03:48:27,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:27,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:27,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:27,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:27,499 INFO L87 Difference]: Start difference. First operand 339 states and 451 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:27,680 INFO L93 Difference]: Finished difference Result 898 states and 1278 transitions. [2022-11-03 03:48:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:27,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:27,683 INFO L225 Difference]: With dead ends: 898 [2022-11-03 03:48:27,684 INFO L226 Difference]: Without dead ends: 693 [2022-11-03 03:48:27,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:27,685 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 837 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:27,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1445 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-11-03 03:48:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 345. [2022-11-03 03:48:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.3313953488372092) internal successors, (458), 344 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 458 transitions. [2022-11-03 03:48:27,694 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 458 transitions. Word has length 182 [2022-11-03 03:48:27,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:27,694 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 458 transitions. [2022-11-03 03:48:27,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 458 transitions. [2022-11-03 03:48:27,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:27,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:27,696 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:27,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-03 03:48:27,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:27,896 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:27,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1912333357, now seen corresponding path program 1 times [2022-11-03 03:48:27,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:27,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266080505] [2022-11-03 03:48:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:27,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:27,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:27,898 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:27,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 03:48:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:28,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:48:28,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:28,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:28,604 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:28,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266080505] [2022-11-03 03:48:28,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266080505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:28,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:28,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:48:28,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62031536] [2022-11-03 03:48:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:28,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:28,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:28,606 INFO L87 Difference]: Start difference. First operand 345 states and 458 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:29,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:29,034 INFO L93 Difference]: Finished difference Result 828 states and 1172 transitions. [2022-11-03 03:48:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:48:29,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:29,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:29,037 INFO L225 Difference]: With dead ends: 828 [2022-11-03 03:48:29,037 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 03:48:29,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:29,038 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 913 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:29,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 1560 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:48:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 03:48:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 347. [2022-11-03 03:48:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.329479768786127) internal successors, (460), 346 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 460 transitions. [2022-11-03 03:48:29,047 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 460 transitions. Word has length 182 [2022-11-03 03:48:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:29,047 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 460 transitions. [2022-11-03 03:48:29,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 460 transitions. [2022-11-03 03:48:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:29,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:29,048 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:29,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:29,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:29,265 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:29,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:29,266 INFO L85 PathProgramCache]: Analyzing trace with hash 696179631, now seen corresponding path program 1 times [2022-11-03 03:48:29,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:29,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655800234] [2022-11-03 03:48:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:29,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:29,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:29,268 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:29,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 03:48:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:30,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:30,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655800234] [2022-11-03 03:48:30,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655800234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:30,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:30,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:30,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750765132] [2022-11-03 03:48:30,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:30,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:30,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:30,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:30,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:30,086 INFO L87 Difference]: Start difference. First operand 347 states and 460 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:30,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:30,279 INFO L93 Difference]: Finished difference Result 958 states and 1365 transitions. [2022-11-03 03:48:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:30,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:30,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:30,282 INFO L225 Difference]: With dead ends: 958 [2022-11-03 03:48:30,282 INFO L226 Difference]: Without dead ends: 753 [2022-11-03 03:48:30,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:30,283 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 884 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:30,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1463 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:30,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-11-03 03:48:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 351. [2022-11-03 03:48:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.3285714285714285) internal successors, (465), 350 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 465 transitions. [2022-11-03 03:48:30,292 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 465 transitions. Word has length 182 [2022-11-03 03:48:30,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:30,292 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 465 transitions. [2022-11-03 03:48:30,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 465 transitions. [2022-11-03 03:48:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:30,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:30,294 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:30,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-03 03:48:30,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:30,503 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash 278783025, now seen corresponding path program 1 times [2022-11-03 03:48:30,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:30,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865445698] [2022-11-03 03:48:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:30,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:30,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:30,506 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:30,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 03:48:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:30,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:30,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:31,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:31,484 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865445698] [2022-11-03 03:48:31,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865445698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:31,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:31,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:48:31,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564747746] [2022-11-03 03:48:31,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:31,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:31,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:31,486 INFO L87 Difference]: Start difference. First operand 351 states and 465 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:31,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:31,732 INFO L93 Difference]: Finished difference Result 907 states and 1288 transitions. [2022-11-03 03:48:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:48:31,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:31,734 INFO L225 Difference]: With dead ends: 907 [2022-11-03 03:48:31,734 INFO L226 Difference]: Without dead ends: 702 [2022-11-03 03:48:31,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:31,735 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 1072 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:31,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1072 Valid, 1884 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:48:31,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-11-03 03:48:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 353. [2022-11-03 03:48:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.3267045454545454) internal successors, (467), 352 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 467 transitions. [2022-11-03 03:48:31,745 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 467 transitions. Word has length 182 [2022-11-03 03:48:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:31,745 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 467 transitions. [2022-11-03 03:48:31,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:31,746 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 467 transitions. [2022-11-03 03:48:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:31,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:31,747 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:31,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-03 03:48:31,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:31,948 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:31,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2054609613, now seen corresponding path program 1 times [2022-11-03 03:48:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:31,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413881381] [2022-11-03 03:48:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:31,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:31,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:31,950 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:31,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 03:48:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:32,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:48:32,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:32,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:32,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:32,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413881381] [2022-11-03 03:48:32,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413881381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:32,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:32,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:48:32,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025814461] [2022-11-03 03:48:32,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:32,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:32,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:32,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:32,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:32,620 INFO L87 Difference]: Start difference. First operand 353 states and 467 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:33,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:33,015 INFO L93 Difference]: Finished difference Result 828 states and 1169 transitions. [2022-11-03 03:48:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:48:33,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:33,017 INFO L225 Difference]: With dead ends: 828 [2022-11-03 03:48:33,017 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 03:48:33,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:33,017 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 879 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:33,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 1528 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:48:33,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 03:48:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 357. [2022-11-03 03:48:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.3258426966292134) internal successors, (472), 356 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 472 transitions. [2022-11-03 03:48:33,027 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 472 transitions. Word has length 182 [2022-11-03 03:48:33,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:33,027 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 472 transitions. [2022-11-03 03:48:33,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:33,027 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 472 transitions. [2022-11-03 03:48:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:33,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:33,029 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:33,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:33,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:33,243 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -793692363, now seen corresponding path program 1 times [2022-11-03 03:48:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:33,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868816567] [2022-11-03 03:48:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:33,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:33,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:33,247 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:33,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 03:48:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:33,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:48:33,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:33,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:33,922 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:33,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868816567] [2022-11-03 03:48:33,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868816567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:33,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:33,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:48:33,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083704950] [2022-11-03 03:48:33,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:33,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:33,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:33,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:33,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:33,924 INFO L87 Difference]: Start difference. First operand 357 states and 472 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:34,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:34,116 INFO L93 Difference]: Finished difference Result 828 states and 1168 transitions. [2022-11-03 03:48:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:48:34,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:34,117 INFO L225 Difference]: With dead ends: 828 [2022-11-03 03:48:34,118 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 03:48:34,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:34,118 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 876 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:34,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 1634 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:34,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 03:48:34,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 359. [2022-11-03 03:48:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.324022346368715) internal successors, (474), 358 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:34,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 474 transitions. [2022-11-03 03:48:34,127 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 474 transitions. Word has length 182 [2022-11-03 03:48:34,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:34,127 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 474 transitions. [2022-11-03 03:48:34,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 474 transitions. [2022-11-03 03:48:34,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:34,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:34,129 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:34,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:34,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:34,346 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:34,347 INFO L85 PathProgramCache]: Analyzing trace with hash 593093047, now seen corresponding path program 1 times [2022-11-03 03:48:34,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:34,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340739887] [2022-11-03 03:48:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:34,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:34,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:34,349 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:34,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 03:48:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:34,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:35,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:35,196 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:35,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340739887] [2022-11-03 03:48:35,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340739887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:35,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:35,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:35,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16962583] [2022-11-03 03:48:35,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:35,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:35,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:35,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:35,198 INFO L87 Difference]: Start difference. First operand 359 states and 474 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:35,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:35,376 INFO L93 Difference]: Finished difference Result 966 states and 1373 transitions. [2022-11-03 03:48:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:35,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:35,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:35,378 INFO L225 Difference]: With dead ends: 966 [2022-11-03 03:48:35,378 INFO L226 Difference]: Without dead ends: 761 [2022-11-03 03:48:35,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:35,380 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 866 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:35,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 1455 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-11-03 03:48:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 361. [2022-11-03 03:48:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.3222222222222222) internal successors, (476), 360 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 476 transitions. [2022-11-03 03:48:35,389 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 476 transitions. Word has length 182 [2022-11-03 03:48:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:35,389 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 476 transitions. [2022-11-03 03:48:35,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 476 transitions. [2022-11-03 03:48:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:35,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:35,391 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:35,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:35,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:35,608 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:35,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1036993721, now seen corresponding path program 1 times [2022-11-03 03:48:35,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:35,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184284353] [2022-11-03 03:48:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:35,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:35,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:35,610 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:35,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 03:48:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:36,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:36,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:36,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:36,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184284353] [2022-11-03 03:48:36,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184284353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:36,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:36,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:48:36,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663784198] [2022-11-03 03:48:36,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:36,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:36,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:36,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:36,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:48:36,587 INFO L87 Difference]: Start difference. First operand 361 states and 476 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:36,767 INFO L93 Difference]: Finished difference Result 927 states and 1314 transitions. [2022-11-03 03:48:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:36,768 INFO L225 Difference]: With dead ends: 927 [2022-11-03 03:48:36,768 INFO L226 Difference]: Without dead ends: 722 [2022-11-03 03:48:36,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:48:36,769 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 812 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:36,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 1433 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-11-03 03:48:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 363. [2022-11-03 03:48:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.3204419889502763) internal successors, (478), 362 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 478 transitions. [2022-11-03 03:48:36,778 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 478 transitions. Word has length 182 [2022-11-03 03:48:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:36,779 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 478 transitions. [2022-11-03 03:48:36,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 478 transitions. [2022-11-03 03:48:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:36,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:36,780 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:36,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:36,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:36,995 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:36,996 INFO L85 PathProgramCache]: Analyzing trace with hash -991592389, now seen corresponding path program 1 times [2022-11-03 03:48:36,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:36,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817177223] [2022-11-03 03:48:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:36,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:36,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:36,998 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:37,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 03:48:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:37,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:48:37,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:37,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:37,617 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:37,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817177223] [2022-11-03 03:48:37,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817177223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:37,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:37,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:48:37,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701972518] [2022-11-03 03:48:37,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:37,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:37,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:37,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:37,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:37,618 INFO L87 Difference]: Start difference. First operand 363 states and 478 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:37,808 INFO L93 Difference]: Finished difference Result 828 states and 1165 transitions. [2022-11-03 03:48:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:48:37,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:37,809 INFO L225 Difference]: With dead ends: 828 [2022-11-03 03:48:37,809 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 03:48:37,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:37,810 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 852 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:37,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 1613 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 03:48:37,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 365. [2022-11-03 03:48:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.3186813186813187) internal successors, (480), 364 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 480 transitions. [2022-11-03 03:48:37,816 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 480 transitions. Word has length 182 [2022-11-03 03:48:37,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:37,817 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 480 transitions. [2022-11-03 03:48:37,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 480 transitions. [2022-11-03 03:48:37,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:37,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:37,825 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:37,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-03 03:48:38,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:38,027 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:38,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:38,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1007111107, now seen corresponding path program 1 times [2022-11-03 03:48:38,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:38,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152449541] [2022-11-03 03:48:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:38,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:38,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:38,029 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:38,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 03:48:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:38,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:48:38,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:39,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:39,000 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:39,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152449541] [2022-11-03 03:48:39,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152449541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:39,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:39,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:48:39,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219851263] [2022-11-03 03:48:39,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:39,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:48:39,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:39,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:48:39,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:48:39,002 INFO L87 Difference]: Start difference. First operand 365 states and 480 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:39,809 INFO L93 Difference]: Finished difference Result 1354 states and 1935 transitions. [2022-11-03 03:48:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:48:39,809 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:39,811 INFO L225 Difference]: With dead ends: 1354 [2022-11-03 03:48:39,811 INFO L226 Difference]: Without dead ends: 1149 [2022-11-03 03:48:39,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:48:39,812 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 2693 mSDsluCounter, 3532 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2693 SdHoareTripleChecker+Valid, 3961 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:39,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2693 Valid, 3961 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:48:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-03 03:48:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 413. [2022-11-03 03:48:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.3155339805825244) internal successors, (542), 412 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 542 transitions. [2022-11-03 03:48:39,824 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 542 transitions. Word has length 182 [2022-11-03 03:48:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:39,825 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 542 transitions. [2022-11-03 03:48:39,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 542 transitions. [2022-11-03 03:48:39,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:39,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:39,826 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:39,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:40,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:40,035 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash -113624769, now seen corresponding path program 1 times [2022-11-03 03:48:40,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006636499] [2022-11-03 03:48:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:40,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:40,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:40,038 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:40,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 03:48:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:40,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:40,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:40,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:40,877 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:40,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006636499] [2022-11-03 03:48:40,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006636499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:40,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:40,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:48:40,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423964869] [2022-11-03 03:48:40,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:40,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:48:40,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:40,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:48:40,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:48:40,878 INFO L87 Difference]: Start difference. First operand 413 states and 542 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:41,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:41,660 INFO L93 Difference]: Finished difference Result 1606 states and 2292 transitions. [2022-11-03 03:48:41,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:48:41,660 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:41,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:41,662 INFO L225 Difference]: With dead ends: 1606 [2022-11-03 03:48:41,663 INFO L226 Difference]: Without dead ends: 1375 [2022-11-03 03:48:41,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:48:41,663 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 2760 mSDsluCounter, 2419 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2760 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:41,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2760 Valid, 2859 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:48:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-11-03 03:48:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 493. [2022-11-03 03:48:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.3211382113821137) internal successors, (650), 492 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 650 transitions. [2022-11-03 03:48:41,675 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 650 transitions. Word has length 182 [2022-11-03 03:48:41,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:41,676 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 650 transitions. [2022-11-03 03:48:41,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:41,676 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 650 transitions. [2022-11-03 03:48:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:41,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:41,677 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:41,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:41,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:41,891 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:41,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1011018047, now seen corresponding path program 1 times [2022-11-03 03:48:41,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:41,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413498027] [2022-11-03 03:48:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:41,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:41,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:41,893 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:41,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 03:48:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:42,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:42,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:42,785 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:42,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413498027] [2022-11-03 03:48:42,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413498027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:42,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:42,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:48:42,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560956486] [2022-11-03 03:48:42,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:42,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:48:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:42,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:48:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:48:42,788 INFO L87 Difference]: Start difference. First operand 493 states and 650 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:43,562 INFO L93 Difference]: Finished difference Result 1666 states and 2377 transitions. [2022-11-03 03:48:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:48:43,562 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:43,564 INFO L225 Difference]: With dead ends: 1666 [2022-11-03 03:48:43,564 INFO L226 Difference]: Without dead ends: 1377 [2022-11-03 03:48:43,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:48:43,565 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 2752 mSDsluCounter, 2437 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2752 SdHoareTripleChecker+Valid, 2884 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:43,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2752 Valid, 2884 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:48:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-11-03 03:48:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 495. [2022-11-03 03:48:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.319838056680162) internal successors, (652), 494 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 652 transitions. [2022-11-03 03:48:43,578 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 652 transitions. Word has length 182 [2022-11-03 03:48:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:43,578 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 652 transitions. [2022-11-03 03:48:43,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 652 transitions. [2022-11-03 03:48:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:43,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:43,580 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:43,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:43,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:43,794 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:43,794 INFO L85 PathProgramCache]: Analyzing trace with hash -587371325, now seen corresponding path program 1 times [2022-11-03 03:48:43,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:43,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484459465] [2022-11-03 03:48:43,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:43,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:43,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:43,797 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:43,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 03:48:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:44,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:44,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:44,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:44,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:44,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484459465] [2022-11-03 03:48:44,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484459465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:44,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:44,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:48:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406166471] [2022-11-03 03:48:44,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:44,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:48:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:44,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:48:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:48:44,711 INFO L87 Difference]: Start difference. First operand 495 states and 652 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:45,516 INFO L93 Difference]: Finished difference Result 1670 states and 2380 transitions. [2022-11-03 03:48:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:48:45,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:45,518 INFO L225 Difference]: With dead ends: 1670 [2022-11-03 03:48:45,519 INFO L226 Difference]: Without dead ends: 1379 [2022-11-03 03:48:45,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:48:45,520 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 2746 mSDsluCounter, 2447 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2746 SdHoareTripleChecker+Valid, 2899 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:45,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2746 Valid, 2899 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:48:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-11-03 03:48:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 497. [2022-11-03 03:48:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.3185483870967742) internal successors, (654), 496 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:45,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 654 transitions. [2022-11-03 03:48:45,533 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 654 transitions. Word has length 182 [2022-11-03 03:48:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:45,534 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 654 transitions. [2022-11-03 03:48:45,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 654 transitions. [2022-11-03 03:48:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:45,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:45,535 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:45,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-03 03:48:45,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:45,750 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:45,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:45,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1862228805, now seen corresponding path program 1 times [2022-11-03 03:48:45,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:45,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148662233] [2022-11-03 03:48:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:45,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:45,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:45,753 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:45,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 03:48:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:46,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:46,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:46,713 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:46,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148662233] [2022-11-03 03:48:46,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148662233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:46,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:46,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:48:46,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335144186] [2022-11-03 03:48:46,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:46,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:48:46,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:48:46,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:48:46,715 INFO L87 Difference]: Start difference. First operand 497 states and 654 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:47,514 INFO L93 Difference]: Finished difference Result 1674 states and 2383 transitions. [2022-11-03 03:48:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:48:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:47,516 INFO L225 Difference]: With dead ends: 1674 [2022-11-03 03:48:47,516 INFO L226 Difference]: Without dead ends: 1381 [2022-11-03 03:48:47,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:48:47,518 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 2740 mSDsluCounter, 2457 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2740 SdHoareTripleChecker+Valid, 2914 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:47,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2740 Valid, 2914 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:48:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-11-03 03:48:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 499. [2022-11-03 03:48:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.3172690763052208) internal successors, (656), 498 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 656 transitions. [2022-11-03 03:48:47,529 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 656 transitions. Word has length 182 [2022-11-03 03:48:47,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:47,529 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 656 transitions. [2022-11-03 03:48:47,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 656 transitions. [2022-11-03 03:48:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:47,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:47,531 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:47,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:47,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:47,749 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1773206969, now seen corresponding path program 1 times [2022-11-03 03:48:47,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:47,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890784653] [2022-11-03 03:48:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:47,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:47,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:47,752 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:47,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 03:48:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:48,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:48,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:48,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:48,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890784653] [2022-11-03 03:48:48,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890784653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:48,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:48,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:48:48,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015400083] [2022-11-03 03:48:48,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:48,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:48:48,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:48,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:48:48,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:48:48,750 INFO L87 Difference]: Start difference. First operand 499 states and 656 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:49,572 INFO L93 Difference]: Finished difference Result 1678 states and 2386 transitions. [2022-11-03 03:48:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:48:49,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:49,574 INFO L225 Difference]: With dead ends: 1678 [2022-11-03 03:48:49,574 INFO L226 Difference]: Without dead ends: 1383 [2022-11-03 03:48:49,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:48:49,575 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 2734 mSDsluCounter, 2467 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2734 SdHoareTripleChecker+Valid, 2929 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:49,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2734 Valid, 2929 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:48:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-11-03 03:48:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 501. [2022-11-03 03:48:49,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.316) internal successors, (658), 500 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 658 transitions. [2022-11-03 03:48:49,584 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 658 transitions. Word has length 182 [2022-11-03 03:48:49,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:49,584 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 658 transitions. [2022-11-03 03:48:49,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 658 transitions. [2022-11-03 03:48:49,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:49,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:49,586 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:49,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-03 03:48:49,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:49,799 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:49,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:49,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1677754825, now seen corresponding path program 1 times [2022-11-03 03:48:49,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:49,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638270983] [2022-11-03 03:48:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:49,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:49,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:49,802 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:49,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 03:48:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:50,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:50,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:50,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:50,795 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:50,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638270983] [2022-11-03 03:48:50,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638270983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:50,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:50,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:48:50,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511076897] [2022-11-03 03:48:50,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:50,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:48:50,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:50,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:48:50,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:48:50,797 INFO L87 Difference]: Start difference. First operand 501 states and 658 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:51,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:51,799 INFO L93 Difference]: Finished difference Result 1818 states and 2591 transitions. [2022-11-03 03:48:51,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:48:51,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:51,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:51,801 INFO L225 Difference]: With dead ends: 1818 [2022-11-03 03:48:51,802 INFO L226 Difference]: Without dead ends: 1521 [2022-11-03 03:48:51,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:48:51,803 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 3024 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3024 SdHoareTripleChecker+Valid, 3629 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:51,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3024 Valid, 3629 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:48:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2022-11-03 03:48:51,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 505. [2022-11-03 03:48:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.3154761904761905) internal successors, (663), 504 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 663 transitions. [2022-11-03 03:48:51,820 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 663 transitions. Word has length 182 [2022-11-03 03:48:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:51,820 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 663 transitions. [2022-11-03 03:48:51,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 663 transitions. [2022-11-03 03:48:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:51,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:51,822 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:51,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:52,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:52,040 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:52,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:52,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1915612597, now seen corresponding path program 1 times [2022-11-03 03:48:52,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:52,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447064923] [2022-11-03 03:48:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:52,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:52,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:52,042 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:52,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 03:48:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:52,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:52,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:53,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:53,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:53,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447064923] [2022-11-03 03:48:53,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447064923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:53,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:53,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:48:53,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228389087] [2022-11-03 03:48:53,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:53,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:48:53,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:53,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:48:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:48:53,011 INFO L87 Difference]: Start difference. First operand 505 states and 663 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:54,001 INFO L93 Difference]: Finished difference Result 1830 states and 2605 transitions. [2022-11-03 03:48:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:48:54,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:54,004 INFO L225 Difference]: With dead ends: 1830 [2022-11-03 03:48:54,005 INFO L226 Difference]: Without dead ends: 1529 [2022-11-03 03:48:54,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:48:54,006 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 3021 mSDsluCounter, 3169 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3021 SdHoareTripleChecker+Valid, 3647 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:54,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3021 Valid, 3647 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:48:54,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2022-11-03 03:48:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 507. [2022-11-03 03:48:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.3142292490118577) internal successors, (665), 506 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 665 transitions. [2022-11-03 03:48:54,021 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 665 transitions. Word has length 182 [2022-11-03 03:48:54,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:54,021 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 665 transitions. [2022-11-03 03:48:54,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 665 transitions. [2022-11-03 03:48:54,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:54,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:54,023 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:54,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-03 03:48:54,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:54,241 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:54,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:54,241 INFO L85 PathProgramCache]: Analyzing trace with hash -529409203, now seen corresponding path program 1 times [2022-11-03 03:48:54,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:54,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394859648] [2022-11-03 03:48:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:54,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:54,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:54,244 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:54,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 03:48:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:54,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:54,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:55,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:55,398 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:55,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394859648] [2022-11-03 03:48:55,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394859648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:55,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:55,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:48:55,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107353651] [2022-11-03 03:48:55,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:55,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:48:55,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:48:55,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:48:55,400 INFO L87 Difference]: Start difference. First operand 507 states and 665 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:56,415 INFO L93 Difference]: Finished difference Result 1840 states and 2616 transitions. [2022-11-03 03:48:56,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:48:56,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:56,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:56,417 INFO L225 Difference]: With dead ends: 1840 [2022-11-03 03:48:56,417 INFO L226 Difference]: Without dead ends: 1537 [2022-11-03 03:48:56,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:48:56,418 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 3018 mSDsluCounter, 3182 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3018 SdHoareTripleChecker+Valid, 3665 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:56,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3018 Valid, 3665 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:48:56,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-11-03 03:48:56,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 509. [2022-11-03 03:48:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.312992125984252) internal successors, (667), 508 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 667 transitions. [2022-11-03 03:48:56,429 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 667 transitions. Word has length 182 [2022-11-03 03:48:56,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:56,430 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 667 transitions. [2022-11-03 03:48:56,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:56,430 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 667 transitions. [2022-11-03 03:48:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:56,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:56,431 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:56,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:56,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:56,650 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:56,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1393818831, now seen corresponding path program 1 times [2022-11-03 03:48:56,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:56,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246847505] [2022-11-03 03:48:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:56,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:56,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:56,652 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:56,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 03:48:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:57,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:57,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:57,625 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:57,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246847505] [2022-11-03 03:48:57,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246847505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:57,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:57,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:48:57,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800978612] [2022-11-03 03:48:57,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:57,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:48:57,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:57,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:48:57,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:48:57,626 INFO L87 Difference]: Start difference. First operand 509 states and 667 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:58,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:58,623 INFO L93 Difference]: Finished difference Result 1850 states and 2627 transitions. [2022-11-03 03:48:58,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:48:58,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:48:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:58,625 INFO L225 Difference]: With dead ends: 1850 [2022-11-03 03:48:58,625 INFO L226 Difference]: Without dead ends: 1545 [2022-11-03 03:48:58,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:48:58,626 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 3015 mSDsluCounter, 3195 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3015 SdHoareTripleChecker+Valid, 3683 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:58,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3015 Valid, 3683 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:48:58,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2022-11-03 03:48:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 511. [2022-11-03 03:48:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.311764705882353) internal successors, (669), 510 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 669 transitions. [2022-11-03 03:48:58,640 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 669 transitions. Word has length 182 [2022-11-03 03:48:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:58,641 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 669 transitions. [2022-11-03 03:48:58,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 669 transitions. [2022-11-03 03:48:58,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:48:58,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:58,642 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:58,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-03 03:48:58,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:58,847 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:58,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:58,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1534367441, now seen corresponding path program 1 times [2022-11-03 03:48:58,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:58,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779290407] [2022-11-03 03:48:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:58,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:58,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:58,851 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:58,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 03:48:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:59,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:59,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:59,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:59,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:59,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779290407] [2022-11-03 03:48:59,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779290407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:59,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:59,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:48:59,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930883554] [2022-11-03 03:48:59,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:59,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:48:59,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:59,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:48:59,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:48:59,807 INFO L87 Difference]: Start difference. First operand 511 states and 669 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:00,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:00,619 INFO L93 Difference]: Finished difference Result 1702 states and 2407 transitions. [2022-11-03 03:49:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:49:00,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:49:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:00,622 INFO L225 Difference]: With dead ends: 1702 [2022-11-03 03:49:00,622 INFO L226 Difference]: Without dead ends: 1395 [2022-11-03 03:49:00,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:49:00,623 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 2702 mSDsluCounter, 2529 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2702 SdHoareTripleChecker+Valid, 3022 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:00,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2702 Valid, 3022 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:49:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2022-11-03 03:49:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 513. [2022-11-03 03:49:00,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.310546875) internal successors, (671), 512 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:00,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 671 transitions. [2022-11-03 03:49:00,637 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 671 transitions. Word has length 182 [2022-11-03 03:49:00,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:00,637 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 671 transitions. [2022-11-03 03:49:00,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:00,637 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 671 transitions. [2022-11-03 03:49:00,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:49:00,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:00,639 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:00,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-03 03:49:00,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:00,856 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:00,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:00,856 INFO L85 PathProgramCache]: Analyzing trace with hash -271070893, now seen corresponding path program 1 times [2022-11-03 03:49:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:00,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983420832] [2022-11-03 03:49:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:00,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:00,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:00,858 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:00,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 03:49:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:01,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:49:01,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:01,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:01,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:01,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983420832] [2022-11-03 03:49:01,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983420832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:01,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:01,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:49:01,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663850694] [2022-11-03 03:49:01,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:01,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:49:01,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:01,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:49:01,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:49:01,881 INFO L87 Difference]: Start difference. First operand 513 states and 671 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:02,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:02,881 INFO L93 Difference]: Finished difference Result 1840 states and 2609 transitions. [2022-11-03 03:49:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:49:02,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:49:02,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:02,883 INFO L225 Difference]: With dead ends: 1840 [2022-11-03 03:49:02,883 INFO L226 Difference]: Without dead ends: 1531 [2022-11-03 03:49:02,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:49:02,884 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 2989 mSDsluCounter, 3216 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2989 SdHoareTripleChecker+Valid, 3714 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:02,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2989 Valid, 3714 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:49:02,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2022-11-03 03:49:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 515. [2022-11-03 03:49:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.3093385214007782) internal successors, (673), 514 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 673 transitions. [2022-11-03 03:49:02,893 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 673 transitions. Word has length 182 [2022-11-03 03:49:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:02,893 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 673 transitions. [2022-11-03 03:49:02,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:02,893 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 673 transitions. [2022-11-03 03:49:02,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:49:02,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:02,894 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:02,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:03,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:03,111 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:03,112 INFO L85 PathProgramCache]: Analyzing trace with hash 151630933, now seen corresponding path program 1 times [2022-11-03 03:49:03,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:03,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971907022] [2022-11-03 03:49:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:03,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:03,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:03,114 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:03,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 03:49:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:03,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:49:03,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:04,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:04,081 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:04,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971907022] [2022-11-03 03:49:04,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971907022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:04,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:04,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:49:04,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331783091] [2022-11-03 03:49:04,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:04,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:49:04,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:49:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:49:04,082 INFO L87 Difference]: Start difference. First operand 515 states and 673 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:05,079 INFO L93 Difference]: Finished difference Result 1850 states and 2620 transitions. [2022-11-03 03:49:05,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:49:05,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:49:05,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:05,082 INFO L225 Difference]: With dead ends: 1850 [2022-11-03 03:49:05,082 INFO L226 Difference]: Without dead ends: 1539 [2022-11-03 03:49:05,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:49:05,084 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 2986 mSDsluCounter, 3229 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2986 SdHoareTripleChecker+Valid, 3732 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:05,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2986 Valid, 3732 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:49:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2022-11-03 03:49:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 517. [2022-11-03 03:49:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.308139534883721) internal successors, (675), 516 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 675 transitions. [2022-11-03 03:49:05,097 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 675 transitions. Word has length 182 [2022-11-03 03:49:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:05,098 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 675 transitions. [2022-11-03 03:49:05,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 675 transitions. [2022-11-03 03:49:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:49:05,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:05,100 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:05,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-03 03:49:05,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:05,317 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:05,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:05,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1537312809, now seen corresponding path program 1 times [2022-11-03 03:49:05,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:05,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031525916] [2022-11-03 03:49:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:05,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:05,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:05,320 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:05,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 03:49:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:05,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:49:05,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:06,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:06,446 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:06,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031525916] [2022-11-03 03:49:06,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031525916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:06,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:06,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:49:06,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229935352] [2022-11-03 03:49:06,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:06,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:49:06,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:06,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:49:06,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:49:06,448 INFO L87 Difference]: Start difference. First operand 517 states and 675 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:07,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:07,531 INFO L93 Difference]: Finished difference Result 1860 states and 2631 transitions. [2022-11-03 03:49:07,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:49:07,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:49:07,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:07,534 INFO L225 Difference]: With dead ends: 1860 [2022-11-03 03:49:07,534 INFO L226 Difference]: Without dead ends: 1547 [2022-11-03 03:49:07,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:49:07,535 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 2983 mSDsluCounter, 3242 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2983 SdHoareTripleChecker+Valid, 3750 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:07,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2983 Valid, 3750 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:49:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2022-11-03 03:49:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 519. [2022-11-03 03:49:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.306949806949807) internal successors, (677), 518 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 677 transitions. [2022-11-03 03:49:07,553 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 677 transitions. Word has length 182 [2022-11-03 03:49:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:07,553 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 677 transitions. [2022-11-03 03:49:07,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 677 transitions. [2022-11-03 03:49:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:49:07,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:07,554 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:07,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:07,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:07,755 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:07,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1169306585, now seen corresponding path program 1 times [2022-11-03 03:49:07,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:07,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313420854] [2022-11-03 03:49:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:07,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:07,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:07,757 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:07,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 03:49:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:08,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:49:08,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:08,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:08,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:08,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313420854] [2022-11-03 03:49:08,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313420854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:08,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:08,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:49:08,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153659924] [2022-11-03 03:49:08,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:08,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:49:08,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:08,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:49:08,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:49:08,729 INFO L87 Difference]: Start difference. First operand 519 states and 677 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:09,574 INFO L93 Difference]: Finished difference Result 1720 states and 2422 transitions. [2022-11-03 03:49:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:49:09,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:49:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:09,576 INFO L225 Difference]: With dead ends: 1720 [2022-11-03 03:49:09,576 INFO L226 Difference]: Without dead ends: 1405 [2022-11-03 03:49:09,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:49:09,577 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 2676 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2676 SdHoareTripleChecker+Valid, 3100 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:09,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2676 Valid, 3100 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:49:09,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-11-03 03:49:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 523. [2022-11-03 03:49:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.3065134099616857) internal successors, (682), 522 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 682 transitions. [2022-11-03 03:49:09,599 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 682 transitions. Word has length 182 [2022-11-03 03:49:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:09,599 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 682 transitions. [2022-11-03 03:49:09,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 682 transitions. [2022-11-03 03:49:09,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:49:09,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:09,601 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:09,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:09,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:09,818 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:09,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:09,818 INFO L85 PathProgramCache]: Analyzing trace with hash 582500571, now seen corresponding path program 1 times [2022-11-03 03:49:09,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:09,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604991380] [2022-11-03 03:49:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:09,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:09,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:09,820 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:09,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 03:49:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:10,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:49:10,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:10,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:10,807 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:10,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604991380] [2022-11-03 03:49:10,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604991380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:10,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:10,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:49:10,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793275713] [2022-11-03 03:49:10,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:10,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:49:10,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:10,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:49:10,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:49:10,808 INFO L87 Difference]: Start difference. First operand 523 states and 682 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:11,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:11,837 INFO L93 Difference]: Finished difference Result 1860 states and 2627 transitions. [2022-11-03 03:49:11,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:49:11,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:49:11,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:11,839 INFO L225 Difference]: With dead ends: 1860 [2022-11-03 03:49:11,839 INFO L226 Difference]: Without dead ends: 1541 [2022-11-03 03:49:11,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:49:11,840 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 2959 mSDsluCounter, 3278 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2959 SdHoareTripleChecker+Valid, 3802 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:11,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2959 Valid, 3802 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:49:11,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2022-11-03 03:49:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 525. [2022-11-03 03:49:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.3053435114503817) internal successors, (684), 524 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 684 transitions. [2022-11-03 03:49:11,849 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 684 transitions. Word has length 182 [2022-11-03 03:49:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:11,850 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 684 transitions. [2022-11-03 03:49:11,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 684 transitions. [2022-11-03 03:49:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:49:11,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:11,851 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:11,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:12,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:12,059 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:12,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:12,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1283565149, now seen corresponding path program 1 times [2022-11-03 03:49:12,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:12,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834913323] [2022-11-03 03:49:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:12,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:12,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:12,062 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:12,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 03:49:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:12,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:49:12,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:13,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:13,062 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:13,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834913323] [2022-11-03 03:49:13,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834913323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:13,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:13,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:49:13,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263054792] [2022-11-03 03:49:13,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:13,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:49:13,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:13,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:49:13,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:49:13,064 INFO L87 Difference]: Start difference. First operand 525 states and 684 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:14,106 INFO L93 Difference]: Finished difference Result 1870 states and 2638 transitions. [2022-11-03 03:49:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:49:14,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:49:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:14,109 INFO L225 Difference]: With dead ends: 1870 [2022-11-03 03:49:14,109 INFO L226 Difference]: Without dead ends: 1549 [2022-11-03 03:49:14,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:49:14,111 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 2956 mSDsluCounter, 3291 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2956 SdHoareTripleChecker+Valid, 3820 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:14,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2956 Valid, 3820 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:49:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2022-11-03 03:49:14,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 527. [2022-11-03 03:49:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.3041825095057034) internal successors, (686), 526 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 686 transitions. [2022-11-03 03:49:14,125 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 686 transitions. Word has length 182 [2022-11-03 03:49:14,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:14,125 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 686 transitions. [2022-11-03 03:49:14,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:14,126 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 686 transitions. [2022-11-03 03:49:14,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:49:14,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:14,127 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:14,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:14,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:14,342 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:14,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1963623519, now seen corresponding path program 1 times [2022-11-03 03:49:14,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:14,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888190257] [2022-11-03 03:49:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:14,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:14,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:14,345 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:14,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 03:49:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:14,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:49:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:15,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:15,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:15,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888190257] [2022-11-03 03:49:15,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888190257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:15,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:15,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:49:15,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351793727] [2022-11-03 03:49:15,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:15,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:49:15,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:15,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:49:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:49:15,340 INFO L87 Difference]: Start difference. First operand 527 states and 686 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:16,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:16,453 INFO L93 Difference]: Finished difference Result 1880 states and 2649 transitions. [2022-11-03 03:49:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:49:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:49:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:16,455 INFO L225 Difference]: With dead ends: 1880 [2022-11-03 03:49:16,455 INFO L226 Difference]: Without dead ends: 1557 [2022-11-03 03:49:16,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:49:16,456 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 2953 mSDsluCounter, 3304 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2953 SdHoareTripleChecker+Valid, 3838 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:16,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2953 Valid, 3838 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:49:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2022-11-03 03:49:16,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 529. [2022-11-03 03:49:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.303030303030303) internal successors, (688), 528 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 688 transitions. [2022-11-03 03:49:16,468 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 688 transitions. Word has length 182 [2022-11-03 03:49:16,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:16,469 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 688 transitions. [2022-11-03 03:49:16,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 688 transitions. [2022-11-03 03:49:16,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:49:16,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:16,470 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:16,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-03 03:49:16,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:16,671 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:16,671 INFO L85 PathProgramCache]: Analyzing trace with hash -556336415, now seen corresponding path program 1 times [2022-11-03 03:49:16,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:16,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175977697] [2022-11-03 03:49:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:16,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:16,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:16,673 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:16,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 03:49:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:17,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:49:17,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:17,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:17,726 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:17,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175977697] [2022-11-03 03:49:17,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175977697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:17,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:17,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:49:17,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254939818] [2022-11-03 03:49:17,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:17,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:49:17,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:49:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:49:17,728 INFO L87 Difference]: Start difference. First operand 529 states and 688 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:18,770 INFO L93 Difference]: Finished difference Result 1890 states and 2660 transitions. [2022-11-03 03:49:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:49:18,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:49:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:18,771 INFO L225 Difference]: With dead ends: 1890 [2022-11-03 03:49:18,772 INFO L226 Difference]: Without dead ends: 1565 [2022-11-03 03:49:18,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:49:18,772 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 2950 mSDsluCounter, 3317 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2950 SdHoareTripleChecker+Valid, 3856 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:18,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2950 Valid, 3856 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:49:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2022-11-03 03:49:18,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 531. [2022-11-03 03:49:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.3018867924528301) internal successors, (690), 530 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 690 transitions. [2022-11-03 03:49:18,787 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 690 transitions. Word has length 182 [2022-11-03 03:49:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:18,787 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 690 transitions. [2022-11-03 03:49:18,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 690 transitions. [2022-11-03 03:49:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:49:18,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:18,788 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:18,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-03 03:49:18,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:18,989 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash -554489373, now seen corresponding path program 1 times [2022-11-03 03:49:18,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:18,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409500884] [2022-11-03 03:49:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:18,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:18,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:18,991 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:18,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 03:49:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:19,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:49:19,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:20,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:21,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:21,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409500884] [2022-11-03 03:49:21,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409500884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:21,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1703556114] [2022-11-03 03:49:21,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:21,232 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:21,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:49:21,235 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:49:21,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 03:49:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:49:22,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:22,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:23,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1703556114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:23,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813087099] [2022-11-03 03:49:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:23,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:23,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:23,690 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:23,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-03 03:49:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:24,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:49:24,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:24,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:25,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813087099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:25,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:49:25,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 03:49:25,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141700589] [2022-11-03 03:49:25,818 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:25,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:49:25,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:25,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:49:25,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:49:25,821 INFO L87 Difference]: Start difference. First operand 531 states and 690 transitions. Second operand has 16 states, 16 states have (on average 22.875) internal successors, (366), 16 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:26,296 INFO L93 Difference]: Finished difference Result 1242 states and 1612 transitions. [2022-11-03 03:49:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:49:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.875) internal successors, (366), 16 states have internal predecessors, (366), 0 states have call successors, (0), 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 182 [2022-11-03 03:49:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:26,298 INFO L225 Difference]: With dead ends: 1242 [2022-11-03 03:49:26,298 INFO L226 Difference]: Without dead ends: 1240 [2022-11-03 03:49:26,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 1070 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:49:26,299 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 2384 mSDsluCounter, 3900 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2384 SdHoareTripleChecker+Valid, 4310 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 509 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:26,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2384 Valid, 4310 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 509 Unchecked, 0.3s Time] [2022-11-03 03:49:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-11-03 03:49:26,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 822. [2022-11-03 03:49:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.2496954933008526) internal successors, (1026), 821 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:26,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1026 transitions. [2022-11-03 03:49:26,315 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1026 transitions. Word has length 182 [2022-11-03 03:49:26,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:26,315 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1026 transitions. [2022-11-03 03:49:26,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.875) internal successors, (366), 16 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1026 transitions. [2022-11-03 03:49:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:49:26,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:26,317 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:26,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:26,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2022-11-03 03:49:26,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 03:49:26,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:26,932 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:26,932 INFO L85 PathProgramCache]: Analyzing trace with hash -574030495, now seen corresponding path program 1 times [2022-11-03 03:49:26,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:26,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214868056] [2022-11-03 03:49:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:26,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:26,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:26,936 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:26,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 03:49:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:27,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:49:27,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:27,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:27,473 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:27,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214868056] [2022-11-03 03:49:27,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214868056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:27,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:27,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:49:27,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767734871] [2022-11-03 03:49:27,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:27,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:49:27,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:27,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:49:27,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:49:27,475 INFO L87 Difference]: Start difference. First operand 822 states and 1026 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:27,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:27,638 INFO L93 Difference]: Finished difference Result 1475 states and 1956 transitions. [2022-11-03 03:49:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:49:27,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-03 03:49:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:27,640 INFO L225 Difference]: With dead ends: 1475 [2022-11-03 03:49:27,640 INFO L226 Difference]: Without dead ends: 952 [2022-11-03 03:49:27,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 03:49:27,641 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 676 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:27,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 765 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:49:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-11-03 03:49:27,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 626. [2022-11-03 03:49:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 1.2976) internal successors, (811), 625 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 811 transitions. [2022-11-03 03:49:27,659 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 811 transitions. Word has length 182 [2022-11-03 03:49:27,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:27,659 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 811 transitions. [2022-11-03 03:49:27,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:27,659 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 811 transitions. [2022-11-03 03:49:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:49:27,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:27,662 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:49:27,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-03 03:49:27,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:27,878 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:27,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1058364221, now seen corresponding path program 1 times [2022-11-03 03:49:27,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:27,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646228509] [2022-11-03 03:49:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:27,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:27,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:27,881 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:27,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 03:49:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:28,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:49:28,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:29,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:29,876 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:29,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646228509] [2022-11-03 03:49:29,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646228509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:29,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1306575307] [2022-11-03 03:49:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:29,877 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:29,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:49:29,878 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:49:29,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-03 03:49:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:31,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:49:31,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:49:31,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:31,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1306575307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:31,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:31,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 03:49:31,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136899496] [2022-11-03 03:49:31,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:31,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:49:31,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:31,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:49:31,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:49:31,064 INFO L87 Difference]: Start difference. First operand 626 states and 811 transitions. Second operand has 5 states, 5 states have (on average 69.4) internal successors, (347), 5 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:31,176 INFO L93 Difference]: Finished difference Result 1883 states and 2526 transitions. [2022-11-03 03:49:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:49:31,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 69.4) internal successors, (347), 5 states have internal predecessors, (347), 0 states have call successors, (0), 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 359 [2022-11-03 03:49:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:31,178 INFO L225 Difference]: With dead ends: 1883 [2022-11-03 03:49:31,178 INFO L226 Difference]: Without dead ends: 1556 [2022-11-03 03:49:31,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1079 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:49:31,179 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 886 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:31,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1551 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:49:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2022-11-03 03:49:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 628. [2022-11-03 03:49:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.2966507177033493) internal successors, (813), 627 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 813 transitions. [2022-11-03 03:49:31,191 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 813 transitions. Word has length 359 [2022-11-03 03:49:31,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:31,191 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 813 transitions. [2022-11-03 03:49:31,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.4) internal successors, (347), 5 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 813 transitions. [2022-11-03 03:49:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:49:31,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:31,193 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:49:31,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-03 03:49:31,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:31,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:31,596 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1832733889, now seen corresponding path program 1 times [2022-11-03 03:49:31,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:31,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761067090] [2022-11-03 03:49:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:31,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:31,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:31,598 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:31,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 03:49:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:32,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:49:32,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:33,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:33,466 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761067090] [2022-11-03 03:49:33,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761067090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:33,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1919066855] [2022-11-03 03:49:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:33,467 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:33,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:49:33,468 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:49:33,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2022-11-03 03:49:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:34,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:49:34,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:49:34,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:34,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1919066855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:34,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:34,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 03:49:34,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734518140] [2022-11-03 03:49:34,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:34,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:49:34,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:34,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:49:34,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:49:34,718 INFO L87 Difference]: Start difference. First operand 628 states and 813 transitions. Second operand has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:34,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:34,837 INFO L93 Difference]: Finished difference Result 1929 states and 2588 transitions. [2022-11-03 03:49:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:49:34,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 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 359 [2022-11-03 03:49:34,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:34,840 INFO L225 Difference]: With dead ends: 1929 [2022-11-03 03:49:34,840 INFO L226 Difference]: Without dead ends: 1600 [2022-11-03 03:49:34,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:49:34,841 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 1435 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:34,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 952 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:49:34,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2022-11-03 03:49:34,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 668. [2022-11-03 03:49:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.3058470764617691) internal successors, (871), 667 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 871 transitions. [2022-11-03 03:49:34,859 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 871 transitions. Word has length 359 [2022-11-03 03:49:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:34,860 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 871 transitions. [2022-11-03 03:49:34,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:34,860 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 871 transitions. [2022-11-03 03:49:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:49:34,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:34,862 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:49:34,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:35,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:35,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:35,285 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1514181441, now seen corresponding path program 1 times [2022-11-03 03:49:35,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:35,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442753912] [2022-11-03 03:49:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:35,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:35,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:35,288 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:35,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 03:49:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:35,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:49:36,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:36,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:37,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:37,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442753912] [2022-11-03 03:49:37,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442753912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:37,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1102680136] [2022-11-03 03:49:37,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:37,144 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:37,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:49:37,176 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:49:37,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-03 03:49:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:38,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:49:38,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-03 03:49:38,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:38,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1102680136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:38,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:38,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 03:49:38,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191169299] [2022-11-03 03:49:38,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:38,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:49:38,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:38,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:49:38,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:49:38,420 INFO L87 Difference]: Start difference. First operand 668 states and 871 transitions. Second operand has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:38,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:38,519 INFO L93 Difference]: Finished difference Result 1838 states and 2503 transitions. [2022-11-03 03:49:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:49:38,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 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 359 [2022-11-03 03:49:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:38,521 INFO L225 Difference]: With dead ends: 1838 [2022-11-03 03:49:38,521 INFO L226 Difference]: Without dead ends: 1400 [2022-11-03 03:49:38,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:49:38,522 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1472 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1472 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:38,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1472 Valid, 1284 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:49:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-11-03 03:49:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 686. [2022-11-03 03:49:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 1.3021897810218979) internal successors, (892), 685 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 892 transitions. [2022-11-03 03:49:38,534 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 892 transitions. Word has length 359 [2022-11-03 03:49:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:38,535 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 892 transitions. [2022-11-03 03:49:38,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 892 transitions. [2022-11-03 03:49:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:49:38,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:38,537 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:49:38,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Ended with exit code 0 [2022-11-03 03:49:38,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-03 03:49:38,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:38,938 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:38,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:38,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1813435201, now seen corresponding path program 1 times [2022-11-03 03:49:38,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:38,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905503844] [2022-11-03 03:49:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:38,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:38,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:38,942 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:38,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 03:49:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:39,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:49:39,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:40,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:40,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:40,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905503844] [2022-11-03 03:49:40,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905503844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:40,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1177523700] [2022-11-03 03:49:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:40,848 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:40,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:49:40,851 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:49:40,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-03 03:49:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:42,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:49:42,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:49:42,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:42,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1177523700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:42,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:42,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 03:49:42,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874084826] [2022-11-03 03:49:42,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:42,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:49:42,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:42,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:49:42,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:49:42,233 INFO L87 Difference]: Start difference. First operand 686 states and 892 transitions. Second operand has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:42,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:42,400 INFO L93 Difference]: Finished difference Result 2157 states and 2957 transitions. [2022-11-03 03:49:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:49:42,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 0 states have call successors, (0), 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 359 [2022-11-03 03:49:42,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:42,407 INFO L225 Difference]: With dead ends: 2157 [2022-11-03 03:49:42,407 INFO L226 Difference]: Without dead ends: 1778 [2022-11-03 03:49:42,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:49:42,408 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 888 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:42,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1611 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:49:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2022-11-03 03:49:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 890. [2022-11-03 03:49:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 1.3352080989876265) internal successors, (1187), 889 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1187 transitions. [2022-11-03 03:49:42,438 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1187 transitions. Word has length 359 [2022-11-03 03:49:42,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:42,439 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1187 transitions. [2022-11-03 03:49:42,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:42,439 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1187 transitions. [2022-11-03 03:49:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:49:42,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:42,441 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:49:42,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:42,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-03 03:49:42,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:42,842 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:42,842 INFO L85 PathProgramCache]: Analyzing trace with hash -795352257, now seen corresponding path program 1 times [2022-11-03 03:49:42,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:42,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295478691] [2022-11-03 03:49:42,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:42,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:42,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:42,845 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:42,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 03:49:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:43,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:49:43,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:44,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:44,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:44,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295478691] [2022-11-03 03:49:44,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295478691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:44,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2046056507] [2022-11-03 03:49:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:44,720 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:44,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:49:44,721 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:49:44,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-03 03:49:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:45,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:49:45,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-03 03:49:45,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:45,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2046056507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:45,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:45,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 03:49:45,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179080121] [2022-11-03 03:49:45,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:45,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:49:45,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:45,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:49:45,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:49:45,929 INFO L87 Difference]: Start difference. First operand 890 states and 1187 transitions. Second operand has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:46,044 INFO L93 Difference]: Finished difference Result 2940 states and 4051 transitions. [2022-11-03 03:49:46,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:49:46,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 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 359 [2022-11-03 03:49:46,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:46,048 INFO L225 Difference]: With dead ends: 2940 [2022-11-03 03:49:46,048 INFO L226 Difference]: Without dead ends: 2314 [2022-11-03 03:49:46,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:49:46,050 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 1414 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:46,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1414 Valid, 1350 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:49:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-11-03 03:49:46,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 862. [2022-11-03 03:49:46,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.3391405342624856) internal successors, (1153), 861 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1153 transitions. [2022-11-03 03:49:46,077 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1153 transitions. Word has length 359 [2022-11-03 03:49:46,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:46,077 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1153 transitions. [2022-11-03 03:49:46,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1153 transitions. [2022-11-03 03:49:46,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:49:46,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:46,080 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:49:46,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:46,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2022-11-03 03:49:46,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:46,503 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:46,504 INFO L85 PathProgramCache]: Analyzing trace with hash 98134081, now seen corresponding path program 1 times [2022-11-03 03:49:46,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:46,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219129671] [2022-11-03 03:49:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:46,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:46,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:46,506 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:46,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 03:49:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:47,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:49:47,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:47,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:48,296 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:48,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219129671] [2022-11-03 03:49:48,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219129671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:48,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2139384525] [2022-11-03 03:49:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:48,297 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:48,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:49:48,304 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:49:48,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-03 03:49:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:49,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:49:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 109 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:50,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 124 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:50,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2139384525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:50,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783165113] [2022-11-03 03:49:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:50,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:50,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:50,727 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:50,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-03 03:49:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:51,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:49:51,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 169 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:49:52,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 169 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:49:53,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783165113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:53,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:49:53,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 7, 7] total 30 [2022-11-03 03:49:53,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533858396] [2022-11-03 03:49:53,383 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:53,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 03:49:53,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:53,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 03:49:53,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:49:53,385 INFO L87 Difference]: Start difference. First operand 862 states and 1153 transitions. Second operand has 30 states, 30 states have (on average 39.46666666666667) internal successors, (1184), 30 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:10,742 INFO L93 Difference]: Finished difference Result 18308 states and 25833 transitions. [2022-11-03 03:50:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-11-03 03:50:10,743 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 39.46666666666667) internal successors, (1184), 30 states have internal predecessors, (1184), 0 states have call successors, (0), 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 359 [2022-11-03 03:50:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:10,754 INFO L225 Difference]: With dead ends: 18308 [2022-11-03 03:50:10,754 INFO L226 Difference]: Without dead ends: 17745 [2022-11-03 03:50:10,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2277 GetRequests, 2120 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9223 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=4911, Invalid=20211, Unknown=0, NotChecked=0, Total=25122 [2022-11-03 03:50:10,758 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 32002 mSDsluCounter, 12967 mSDsCounter, 0 mSdLazyCounter, 3527 mSolverCounterSat, 669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32002 SdHoareTripleChecker+Valid, 13690 SdHoareTripleChecker+Invalid, 4196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 3527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:10,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32002 Valid, 13690 Invalid, 4196 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [669 Valid, 3527 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 03:50:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17745 states. [2022-11-03 03:50:10,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17745 to 2731. [2022-11-03 03:50:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 1.404029304029304) internal successors, (3833), 2730 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:10,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 3833 transitions. [2022-11-03 03:50:10,993 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 3833 transitions. Word has length 359 [2022-11-03 03:50:10,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:10,994 INFO L495 AbstractCegarLoop]: Abstraction has 2731 states and 3833 transitions. [2022-11-03 03:50:10,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 39.46666666666667) internal successors, (1184), 30 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:10,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 3833 transitions. [2022-11-03 03:50:10,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:50:10,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:10,998 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:50:11,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-11-03 03:50:11,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:11,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Ended with exit code 0 [2022-11-03 03:50:11,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:11,599 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:11,600 INFO L85 PathProgramCache]: Analyzing trace with hash -937420983, now seen corresponding path program 1 times [2022-11-03 03:50:11,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:11,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738559806] [2022-11-03 03:50:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:11,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:11,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:11,603 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:11,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-03 03:50:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:12,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:50:12,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:13,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:17,137 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:17,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738559806] [2022-11-03 03:50:17,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738559806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:17,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1520550888] [2022-11-03 03:50:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:17,138 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:17,140 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:17,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-03 03:50:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:18,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:50:18,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:50:18,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:18,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1520550888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:18,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:50:18,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:50:18,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662276504] [2022-11-03 03:50:18,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:18,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:50:18,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:50:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:50:18,348 INFO L87 Difference]: Start difference. First operand 2731 states and 3833 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:18,516 INFO L93 Difference]: Finished difference Result 6903 states and 9731 transitions. [2022-11-03 03:50:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:50:18,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 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 359 [2022-11-03 03:50:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:18,520 INFO L225 Difference]: With dead ends: 6903 [2022-11-03 03:50:18,520 INFO L226 Difference]: Without dead ends: 5017 [2022-11-03 03:50:18,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:50:18,522 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 1321 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:18,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1321 Valid, 1043 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:18,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5017 states. [2022-11-03 03:50:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5017 to 2731. [2022-11-03 03:50:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 1.4003663003663003) internal successors, (3823), 2730 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 3823 transitions. [2022-11-03 03:50:18,590 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 3823 transitions. Word has length 359 [2022-11-03 03:50:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:18,590 INFO L495 AbstractCegarLoop]: Abstraction has 2731 states and 3823 transitions. [2022-11-03 03:50:18,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 3823 transitions. [2022-11-03 03:50:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:50:18,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:18,595 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:50:18,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (92)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:18,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:19,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:19,010 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:19,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1482293557, now seen corresponding path program 1 times [2022-11-03 03:50:19,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:19,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852906856] [2022-11-03 03:50:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:19,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:19,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:19,013 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:19,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-03 03:50:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:19,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:50:19,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:21,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:24,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:24,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852906856] [2022-11-03 03:50:24,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852906856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:24,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1445460887] [2022-11-03 03:50:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:24,385 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:24,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:24,386 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:24,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2022-11-03 03:50:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:25,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:50:25,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:50:25,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:25,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1445460887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:25,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:50:25,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:50:25,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341312691] [2022-11-03 03:50:25,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:25,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:50:25,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:25,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:50:25,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:50:25,631 INFO L87 Difference]: Start difference. First operand 2731 states and 3823 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:25,799 INFO L93 Difference]: Finished difference Result 6867 states and 9662 transitions. [2022-11-03 03:50:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:50:25,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 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 359 [2022-11-03 03:50:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:25,802 INFO L225 Difference]: With dead ends: 6867 [2022-11-03 03:50:25,803 INFO L226 Difference]: Without dead ends: 5049 [2022-11-03 03:50:25,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:50:25,804 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1349 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:25,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1349 Valid, 1029 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5049 states. [2022-11-03 03:50:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5049 to 2731. [2022-11-03 03:50:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 1.3989010989010988) internal successors, (3819), 2730 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 3819 transitions. [2022-11-03 03:50:25,864 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 3819 transitions. Word has length 359 [2022-11-03 03:50:25,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:25,865 INFO L495 AbstractCegarLoop]: Abstraction has 2731 states and 3819 transitions. [2022-11-03 03:50:25,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 3819 transitions. [2022-11-03 03:50:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:50:25,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:25,869 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:50:25,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (94)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:26,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:26,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:26,272 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:26,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:26,273 INFO L85 PathProgramCache]: Analyzing trace with hash -451252659, now seen corresponding path program 1 times [2022-11-03 03:50:26,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:26,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365512452] [2022-11-03 03:50:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:26,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:26,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:26,275 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:26,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 03:50:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:26,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:50:26,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:28,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:31,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365512452] [2022-11-03 03:50:31,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365512452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [923570884] [2022-11-03 03:50:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:31,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:31,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:31,596 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:31,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2022-11-03 03:50:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:32,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:50:32,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:50:32,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:32,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [923570884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:32,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:50:32,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:50:32,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46628078] [2022-11-03 03:50:32,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:32,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:50:32,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:32,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:50:32,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:50:32,849 INFO L87 Difference]: Start difference. First operand 2731 states and 3819 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:33,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:33,007 INFO L93 Difference]: Finished difference Result 6827 states and 9592 transitions. [2022-11-03 03:50:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:50:33,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 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 359 [2022-11-03 03:50:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:33,013 INFO L225 Difference]: With dead ends: 6827 [2022-11-03 03:50:33,013 INFO L226 Difference]: Without dead ends: 5045 [2022-11-03 03:50:33,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:50:33,014 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1353 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:33,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1353 Valid, 1026 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5045 states. [2022-11-03 03:50:33,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5045 to 2731. [2022-11-03 03:50:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 1.395970695970696) internal successors, (3811), 2730 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 3811 transitions. [2022-11-03 03:50:33,082 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 3811 transitions. Word has length 359 [2022-11-03 03:50:33,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:33,082 INFO L495 AbstractCegarLoop]: Abstraction has 2731 states and 3811 transitions. [2022-11-03 03:50:33,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 3811 transitions. [2022-11-03 03:50:33,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:50:33,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:33,087 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:50:33,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:33,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (96)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:33,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:33,500 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:33,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1221986225, now seen corresponding path program 1 times [2022-11-03 03:50:33,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:33,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152725951] [2022-11-03 03:50:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:33,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:33,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:33,502 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:33,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 03:50:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:34,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:50:34,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:35,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:38,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:38,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152725951] [2022-11-03 03:50:38,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152725951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:38,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [436209130] [2022-11-03 03:50:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:38,752 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:38,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:38,752 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:38,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-03 03:50:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:39,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:50:39,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:50:40,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:40,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [436209130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:40,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:50:40,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:50:40,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734541216] [2022-11-03 03:50:40,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:40,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:50:40,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:40,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:50:40,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:50:40,037 INFO L87 Difference]: Start difference. First operand 2731 states and 3811 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:40,188 INFO L93 Difference]: Finished difference Result 6803 states and 9540 transitions. [2022-11-03 03:50:40,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:50:40,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 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 359 [2022-11-03 03:50:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:40,196 INFO L225 Difference]: With dead ends: 6803 [2022-11-03 03:50:40,196 INFO L226 Difference]: Without dead ends: 5045 [2022-11-03 03:50:40,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:50:40,199 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1355 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:40,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1355 Valid, 1023 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:40,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5045 states. [2022-11-03 03:50:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5045 to 2731. [2022-11-03 03:50:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 1.393040293040293) internal successors, (3803), 2730 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 3803 transitions. [2022-11-03 03:50:40,267 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 3803 transitions. Word has length 359 [2022-11-03 03:50:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:40,268 INFO L495 AbstractCegarLoop]: Abstraction has 2731 states and 3803 transitions. [2022-11-03 03:50:40,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 3803 transitions. [2022-11-03 03:50:40,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:50:40,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:40,272 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:50:40,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:40,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:40,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:40,680 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:40,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:40,680 INFO L85 PathProgramCache]: Analyzing trace with hash 102869969, now seen corresponding path program 1 times [2022-11-03 03:50:40,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:40,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160610428] [2022-11-03 03:50:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:40,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:40,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:40,683 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:40,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-03 03:50:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:41,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:50:41,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:42,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:45,974 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:45,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160610428] [2022-11-03 03:50:45,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160610428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:45,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1254299665] [2022-11-03 03:50:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:45,974 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:45,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:45,975 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:45,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (100)] Waiting until timeout for monitored process [2022-11-03 03:50:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:50:47,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:50:47,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:47,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1254299665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:47,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:50:47,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:50:47,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884034229] [2022-11-03 03:50:47,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:47,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:50:47,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:47,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:50:47,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:50:47,236 INFO L87 Difference]: Start difference. First operand 2731 states and 3803 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:47,384 INFO L93 Difference]: Finished difference Result 6771 states and 9476 transitions. [2022-11-03 03:50:47,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:50:47,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 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 359 [2022-11-03 03:50:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:47,388 INFO L225 Difference]: With dead ends: 6771 [2022-11-03 03:50:47,388 INFO L226 Difference]: Without dead ends: 5045 [2022-11-03 03:50:47,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:50:47,390 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1358 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1358 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:47,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1358 Valid, 1020 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5045 states. [2022-11-03 03:50:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5045 to 2731. [2022-11-03 03:50:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 1.39010989010989) internal successors, (3795), 2730 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 3795 transitions. [2022-11-03 03:50:47,431 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 3795 transitions. Word has length 359 [2022-11-03 03:50:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:47,431 INFO L495 AbstractCegarLoop]: Abstraction has 2731 states and 3795 transitions. [2022-11-03 03:50:47,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 3795 transitions. [2022-11-03 03:50:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:50:47,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:47,435 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:50:47,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2022-11-03 03:50:47,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (100)] Ended with exit code 0 [2022-11-03 03:50:47,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:47,836 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:47,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:47,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1836974419, now seen corresponding path program 1 times [2022-11-03 03:50:47,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:47,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118387345] [2022-11-03 03:50:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:47,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:47,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:47,838 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:47,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-03 03:50:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:48,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:50:48,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:50,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:53,136 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:53,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118387345] [2022-11-03 03:50:53,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118387345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:53,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [879328393] [2022-11-03 03:50:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:53,137 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:53,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:53,140 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:53,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2022-11-03 03:50:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:54,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:50:54,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:50:54,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:54,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [879328393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:54,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:50:54,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:50:54,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542514303] [2022-11-03 03:50:54,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:54,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:50:54,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:54,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:50:54,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:50:54,464 INFO L87 Difference]: Start difference. First operand 2731 states and 3795 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:54,612 INFO L93 Difference]: Finished difference Result 6611 states and 9228 transitions. [2022-11-03 03:50:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:50:54,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 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 359 [2022-11-03 03:50:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:54,616 INFO L225 Difference]: With dead ends: 6611 [2022-11-03 03:50:54,616 INFO L226 Difference]: Without dead ends: 5037 [2022-11-03 03:50:54,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:50:54,618 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1370 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:54,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1370 Valid, 1015 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:54,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5037 states. [2022-11-03 03:50:54,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 2891. [2022-11-03 03:50:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2890 states have (on average 1.3906574394463669) internal successors, (4019), 2890 states have internal predecessors, (4019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 4019 transitions. [2022-11-03 03:50:54,662 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 4019 transitions. Word has length 359 [2022-11-03 03:50:54,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:54,662 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 4019 transitions. [2022-11-03 03:50:54,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 4019 transitions. [2022-11-03 03:50:54,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:50:54,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:54,665 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:50:54,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Ended with exit code 0 [2022-11-03 03:50:54,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (102)] Ended with exit code 0 [2022-11-03 03:50:55,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:55,066 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:55,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1071207467, now seen corresponding path program 1 times [2022-11-03 03:50:55,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:55,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282512054] [2022-11-03 03:50:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:55,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:55,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:55,069 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:55,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-03 03:50:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:55,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:50:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:57,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:51:00,568 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:00,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282512054] [2022-11-03 03:51:00,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282512054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:00,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304661182] [2022-11-03 03:51:00,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:00,568 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:00,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:00,569 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:00,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2022-11-03 03:51:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:01,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:01,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:51:01,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:01,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [304661182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:01,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:01,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:51:01,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089119422] [2022-11-03 03:51:01,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:01,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:01,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:01,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:01,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:51:01,886 INFO L87 Difference]: Start difference. First operand 2891 states and 4019 transitions. Second operand has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:02,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:02,041 INFO L93 Difference]: Finished difference Result 6643 states and 9244 transitions. [2022-11-03 03:51:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:51:02,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 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 359 [2022-11-03 03:51:02,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:02,045 INFO L225 Difference]: With dead ends: 6643 [2022-11-03 03:51:02,045 INFO L226 Difference]: Without dead ends: 5037 [2022-11-03 03:51:02,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:51:02,047 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 1372 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:02,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1372 Valid, 1012 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5037 states. [2022-11-03 03:51:02,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 2987. [2022-11-03 03:51:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2987 states, 2986 states have (on average 1.3888144675150704) internal successors, (4147), 2986 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2987 states to 2987 states and 4147 transitions. [2022-11-03 03:51:02,093 INFO L78 Accepts]: Start accepts. Automaton has 2987 states and 4147 transitions. Word has length 359 [2022-11-03 03:51:02,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:02,094 INFO L495 AbstractCegarLoop]: Abstraction has 2987 states and 4147 transitions. [2022-11-03 03:51:02,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2987 states and 4147 transitions. [2022-11-03 03:51:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:51:02,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:02,097 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:51:02,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (104)] Ended with exit code 0 [2022-11-03 03:51:02,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Ended with exit code 0 [2022-11-03 03:51:02,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:02,498 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:02,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:02,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1086726185, now seen corresponding path program 1 times [2022-11-03 03:51:02,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:02,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145770965] [2022-11-03 03:51:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:02,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:02,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:02,500 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:02,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-03 03:51:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:03,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:51:03,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:51:04,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:51:07,886 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:07,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145770965] [2022-11-03 03:51:07,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145770965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:07,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1337793854] [2022-11-03 03:51:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:07,886 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:07,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:07,887 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:07,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2022-11-03 03:51:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:09,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:51:09,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 43 proven. 33 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:51:10,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 43 proven. 33 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:51:11,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1337793854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:11,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072055213] [2022-11-03 03:51:11,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:11,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:11,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:11,688 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:11,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-11-03 03:51:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:12,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:51:12,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 157 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:51:13,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 157 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:51:14,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072055213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:14,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:51:14,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 8, 8] total 36 [2022-11-03 03:51:14,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511164201] [2022-11-03 03:51:14,226 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:51:14,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:51:14,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:14,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:51:14,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1172, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 03:51:14,228 INFO L87 Difference]: Start difference. First operand 2987 states and 4147 transitions. Second operand has 36 states, 36 states have (on average 38.861111111111114) internal successors, (1399), 36 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:06,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:06,053 INFO L93 Difference]: Finished difference Result 55537 states and 78680 transitions. [2022-11-03 03:52:06,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 358 states. [2022-11-03 03:52:06,054 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 38.861111111111114) internal successors, (1399), 36 states have internal predecessors, (1399), 0 states have call successors, (0), 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 359 [2022-11-03 03:52:06,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:06,081 INFO L225 Difference]: With dead ends: 55537 [2022-11-03 03:52:06,081 INFO L226 Difference]: Without dead ends: 53139 [2022-11-03 03:52:06,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2509 GetRequests, 2119 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65652 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=23129, Invalid=130143, Unknown=0, NotChecked=0, Total=153272 [2022-11-03 03:52:06,096 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 32959 mSDsluCounter, 11914 mSDsCounter, 0 mSdLazyCounter, 3144 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32959 SdHoareTripleChecker+Valid, 12687 SdHoareTripleChecker+Invalid, 7212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 3144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3391 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:06,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32959 Valid, 12687 Invalid, 7212 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [677 Valid, 3144 Invalid, 0 Unknown, 3391 Unchecked, 4.6s Time] [2022-11-03 03:52:06,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53139 states. [2022-11-03 03:52:06,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53139 to 3363. [2022-11-03 03:52:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 1.387269482450922) internal successors, (4664), 3362 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 4664 transitions. [2022-11-03 03:52:06,368 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 4664 transitions. Word has length 359 [2022-11-03 03:52:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:06,368 INFO L495 AbstractCegarLoop]: Abstraction has 3363 states and 4664 transitions. [2022-11-03 03:52:06,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 38.861111111111114) internal successors, (1399), 36 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 4664 transitions. [2022-11-03 03:52:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:52:06,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:06,372 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:52:06,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (106)] Ended with exit code 0 [2022-11-03 03:52:06,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-11-03 03:52:06,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Ended with exit code 0 [2022-11-03 03:52:06,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:52:06,973 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:06,973 INFO L85 PathProgramCache]: Analyzing trace with hash -990698531, now seen corresponding path program 1 times [2022-11-03 03:52:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:06,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516653079] [2022-11-03 03:52:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:06,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:06,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:06,975 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:06,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-03 03:52:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:07,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:52:07,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:09,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:12,320 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:12,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516653079] [2022-11-03 03:52:12,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516653079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:12,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1743689351] [2022-11-03 03:52:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:12,321 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:12,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:12,322 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:12,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2022-11-03 03:52:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:13,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:52:13,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:52:13,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:13,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1743689351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:13,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:52:13,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:52:13,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991201414] [2022-11-03 03:52:13,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:13,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:52:13,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:13,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:52:13,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:52:13,545 INFO L87 Difference]: Start difference. First operand 3363 states and 4664 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:13,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:13,704 INFO L93 Difference]: Finished difference Result 12385 states and 17366 transitions. [2022-11-03 03:52:13,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:52:13,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 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 359 [2022-11-03 03:52:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:13,710 INFO L225 Difference]: With dead ends: 12385 [2022-11-03 03:52:13,710 INFO L226 Difference]: Without dead ends: 9619 [2022-11-03 03:52:13,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:52:13,714 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1320 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:13,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1320 Valid, 1068 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:52:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9619 states. [2022-11-03 03:52:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9619 to 4125. [2022-11-03 03:52:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4125 states, 4124 states have (on average 1.3945198836081474) internal successors, (5751), 4124 states have internal predecessors, (5751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4125 states to 4125 states and 5751 transitions. [2022-11-03 03:52:13,784 INFO L78 Accepts]: Start accepts. Automaton has 4125 states and 5751 transitions. Word has length 359 [2022-11-03 03:52:13,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:13,784 INFO L495 AbstractCegarLoop]: Abstraction has 4125 states and 5751 transitions. [2022-11-03 03:52:13,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 4125 states and 5751 transitions. [2022-11-03 03:52:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:52:13,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:13,788 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:52:13,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Ended with exit code 0 [2022-11-03 03:52:13,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (109)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:14,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:14,189 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:14,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:14,189 INFO L85 PathProgramCache]: Analyzing trace with hash -627232033, now seen corresponding path program 1 times [2022-11-03 03:52:14,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:14,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809532620] [2022-11-03 03:52:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:14,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:14,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:14,192 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:14,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-03 03:52:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:14,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:52:14,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:16,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:19,546 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:19,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809532620] [2022-11-03 03:52:19,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809532620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:19,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1217030688] [2022-11-03 03:52:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:19,547 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:19,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:19,550 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:19,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (111)] Waiting until timeout for monitored process [2022-11-03 03:52:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:20,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:52:20,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:52:20,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:20,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1217030688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:20,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:52:20,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:52:20,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989754910] [2022-11-03 03:52:20,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:20,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:52:20,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:20,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:52:20,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:52:20,788 INFO L87 Difference]: Start difference. First operand 4125 states and 5751 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:20,946 INFO L93 Difference]: Finished difference Result 12789 states and 17920 transitions. [2022-11-03 03:52:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:52:20,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 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 359 [2022-11-03 03:52:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:20,952 INFO L225 Difference]: With dead ends: 12789 [2022-11-03 03:52:20,952 INFO L226 Difference]: Without dead ends: 9691 [2022-11-03 03:52:20,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:52:20,956 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 1348 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1348 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:20,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1348 Valid, 1054 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:52:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9691 states. [2022-11-03 03:52:21,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9691 to 4469. [2022-11-03 03:52:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 4468 states have (on average 1.3945837063563116) internal successors, (6231), 4468 states have internal predecessors, (6231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 6231 transitions. [2022-11-03 03:52:21,031 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 6231 transitions. Word has length 359 [2022-11-03 03:52:21,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:21,031 INFO L495 AbstractCegarLoop]: Abstraction has 4469 states and 6231 transitions. [2022-11-03 03:52:21,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 6231 transitions. [2022-11-03 03:52:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:52:21,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:21,035 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:52:21,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Ended with exit code 0 [2022-11-03 03:52:21,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (111)] Ended with exit code 0 [2022-11-03 03:52:21,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:21,436 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:21,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:21,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1934374431, now seen corresponding path program 1 times [2022-11-03 03:52:21,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:21,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382120053] [2022-11-03 03:52:21,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:21,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:21,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:21,438 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:21,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-03 03:52:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:22,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:52:22,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:23,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:26,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:26,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382120053] [2022-11-03 03:52:26,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382120053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:26,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [695986479] [2022-11-03 03:52:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:26,852 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:26,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:26,860 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:26,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2022-11-03 03:52:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:27,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:52:27,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:52:28,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:28,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [695986479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:28,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:52:28,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:52:28,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154931882] [2022-11-03 03:52:28,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:28,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:52:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:52:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:52:28,125 INFO L87 Difference]: Start difference. First operand 4469 states and 6231 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:28,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:28,281 INFO L93 Difference]: Finished difference Result 12917 states and 18078 transitions. [2022-11-03 03:52:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:52:28,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 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 359 [2022-11-03 03:52:28,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:28,287 INFO L225 Difference]: With dead ends: 12917 [2022-11-03 03:52:28,287 INFO L226 Difference]: Without dead ends: 9683 [2022-11-03 03:52:28,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:52:28,290 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1352 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:28,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 1051 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:52:28,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9683 states. [2022-11-03 03:52:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9683 to 4597. [2022-11-03 03:52:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 1.3931679721496955) internal successors, (6403), 4596 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 6403 transitions. [2022-11-03 03:52:28,356 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 6403 transitions. Word has length 359 [2022-11-03 03:52:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:28,357 INFO L495 AbstractCegarLoop]: Abstraction has 4597 states and 6403 transitions. [2022-11-03 03:52:28,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 6403 transitions. [2022-11-03 03:52:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:52:28,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:28,361 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:52:28,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-03 03:52:28,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (113)] Ended with exit code 0 [2022-11-03 03:52:28,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:28,761 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:28,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:28,762 INFO L85 PathProgramCache]: Analyzing trace with hash 420010851, now seen corresponding path program 1 times [2022-11-03 03:52:28,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:28,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378808608] [2022-11-03 03:52:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:28,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:28,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:28,764 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:28,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-03 03:52:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:29,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:52:29,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:31,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:34,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:34,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378808608] [2022-11-03 03:52:34,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378808608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:34,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [749482679] [2022-11-03 03:52:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:34,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:34,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:34,207 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:34,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2022-11-03 03:52:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:35,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:52:35,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:52:35,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:35,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [749482679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:35,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:52:35,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:52:35,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444080973] [2022-11-03 03:52:35,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:35,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:52:35,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:35,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:52:35,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:52:35,484 INFO L87 Difference]: Start difference. First operand 4597 states and 6403 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:35,639 INFO L93 Difference]: Finished difference Result 12673 states and 17686 transitions. [2022-11-03 03:52:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:52:35,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 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 359 [2022-11-03 03:52:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:35,646 INFO L225 Difference]: With dead ends: 12673 [2022-11-03 03:52:35,646 INFO L226 Difference]: Without dead ends: 9655 [2022-11-03 03:52:35,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:52:35,649 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 1370 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:35,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1370 Valid, 1041 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:52:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9655 states. [2022-11-03 03:52:35,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9655 to 5157. [2022-11-03 03:52:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5157 states, 5156 states have (on average 1.3877036462373933) internal successors, (7155), 5156 states have internal predecessors, (7155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5157 states to 5157 states and 7155 transitions. [2022-11-03 03:52:35,719 INFO L78 Accepts]: Start accepts. Automaton has 5157 states and 7155 transitions. Word has length 359 [2022-11-03 03:52:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:35,720 INFO L495 AbstractCegarLoop]: Abstraction has 5157 states and 7155 transitions. [2022-11-03 03:52:35,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5157 states and 7155 transitions. [2022-11-03 03:52:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:52:35,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:35,726 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:52:35,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:35,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (115)] Ended with exit code 0 [2022-11-03 03:52:36,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:36,127 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:36,127 INFO L85 PathProgramCache]: Analyzing trace with hash -796142875, now seen corresponding path program 1 times [2022-11-03 03:52:36,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:36,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533036511] [2022-11-03 03:52:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:36,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:36,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:36,129 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:36,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-03 03:52:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:36,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:52:36,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:38,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:41,498 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:41,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533036511] [2022-11-03 03:52:41,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533036511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:41,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [5192058] [2022-11-03 03:52:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:41,498 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:41,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:41,499 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:41,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (117)] Waiting until timeout for monitored process [2022-11-03 03:52:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:42,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:52:42,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:52:42,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:42,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [5192058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:42,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:52:42,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 03:52:42,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378863959] [2022-11-03 03:52:42,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:42,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:52:42,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:42,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:52:42,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:52:42,789 INFO L87 Difference]: Start difference. First operand 5157 states and 7155 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:42,951 INFO L93 Difference]: Finished difference Result 12733 states and 17678 transitions. [2022-11-03 03:52:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:52:42,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 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 359 [2022-11-03 03:52:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:42,957 INFO L225 Difference]: With dead ends: 12733 [2022-11-03 03:52:42,957 INFO L226 Difference]: Without dead ends: 9655 [2022-11-03 03:52:42,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:52:42,960 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 1374 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1374 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:42,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1374 Valid, 1038 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:52:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9655 states. [2022-11-03 03:52:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9655 to 5597. [2022-11-03 03:52:43,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5597 states, 5596 states have (on average 1.3843817012151536) internal successors, (7747), 5596 states have internal predecessors, (7747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 7747 transitions. [2022-11-03 03:52:43,029 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 7747 transitions. Word has length 359 [2022-11-03 03:52:43,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:43,029 INFO L495 AbstractCegarLoop]: Abstraction has 5597 states and 7747 transitions. [2022-11-03 03:52:43,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 7747 transitions. [2022-11-03 03:52:43,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:52:43,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:43,034 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:52:43,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (116)] Ended with exit code 0 [2022-11-03 03:52:43,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (117)] Ended with exit code 0 [2022-11-03 03:52:43,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:43,435 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash 464774375, now seen corresponding path program 1 times [2022-11-03 03:52:43,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:43,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526968892] [2022-11-03 03:52:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:43,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:43,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:43,437 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:43,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-03 03:52:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:44,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:52:44,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:45,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 167 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:52:48,952 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:48,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526968892] [2022-11-03 03:52:48,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526968892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:48,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [614273112] [2022-11-03 03:52:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:48,952 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:48,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:48,956 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:48,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2022-11-03 03:52:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:52:50,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:52:51,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:52:52,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [614273112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:52,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606446032] [2022-11-03 03:52:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:52,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:52,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:52,982 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:52,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-03 03:52:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:53,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:52:53,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 153 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:52:54,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 153 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:52:55,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606446032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:55,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:52:55,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 6, 6] total 33 [2022-11-03 03:52:55,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642151021] [2022-11-03 03:52:55,446 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:52:55,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 03:52:55,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 03:52:55,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 03:52:55,449 INFO L87 Difference]: Start difference. First operand 5597 states and 7747 transitions. Second operand has 33 states, 33 states have (on average 42.60606060606061) internal successors, (1406), 33 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:29,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:29,166 INFO L93 Difference]: Finished difference Result 101938 states and 141853 transitions. [2022-11-03 03:53:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-11-03 03:53:29,167 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 42.60606060606061) internal successors, (1406), 33 states have internal predecessors, (1406), 0 states have call successors, (0), 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 359 [2022-11-03 03:53:29,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:29,212 INFO L225 Difference]: With dead ends: 101938 [2022-11-03 03:53:29,212 INFO L226 Difference]: Without dead ends: 96874 [2022-11-03 03:53:29,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2369 GetRequests, 2126 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20829 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=10210, Invalid=49570, Unknown=0, NotChecked=0, Total=59780 [2022-11-03 03:53:29,223 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 23621 mSDsluCounter, 12207 mSDsCounter, 0 mSdLazyCounter, 2756 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23621 SdHoareTripleChecker+Valid, 12991 SdHoareTripleChecker+Invalid, 7097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 2756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3936 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:29,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23621 Valid, 12991 Invalid, 7097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 2756 Invalid, 0 Unknown, 3936 Unchecked, 3.9s Time] [2022-11-03 03:53:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96874 states. [2022-11-03 03:53:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96874 to 5691. [2022-11-03 03:53:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5691 states, 5690 states have (on average 1.3780316344463972) internal successors, (7841), 5690 states have internal predecessors, (7841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5691 states to 5691 states and 7841 transitions. [2022-11-03 03:53:29,564 INFO L78 Accepts]: Start accepts. Automaton has 5691 states and 7841 transitions. Word has length 359 [2022-11-03 03:53:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:29,565 INFO L495 AbstractCegarLoop]: Abstraction has 5691 states and 7841 transitions. [2022-11-03 03:53:29,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 42.60606060606061) internal successors, (1406), 33 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:29,565 INFO L276 IsEmpty]: Start isEmpty. Operand 5691 states and 7841 transitions. [2022-11-03 03:53:29,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:53:29,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:29,569 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:53:29,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (119)] Ended with exit code 0 [2022-11-03 03:53:29,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:29,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-11-03 03:53:30,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:30,170 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:30,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:30,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1422418799, now seen corresponding path program 1 times [2022-11-03 03:53:30,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:30,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754909402] [2022-11-03 03:53:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:30,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:30,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:30,173 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:30,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-03 03:53:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:30,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:53:30,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 165 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:31,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 165 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:32,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754909402] [2022-11-03 03:53:32,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754909402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [996841979] [2022-11-03 03:53:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:32,067 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:32,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:32,068 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:32,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (122)] Waiting until timeout for monitored process [2022-11-03 03:53:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:33,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:33,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:53:33,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:33,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [996841979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:33,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:53:33,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 17 [2022-11-03 03:53:33,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114320231] [2022-11-03 03:53:33,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:33,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:53:33,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:33,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:53:33,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:53:33,294 INFO L87 Difference]: Start difference. First operand 5691 states and 7841 transitions. Second operand has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:33,516 INFO L93 Difference]: Finished difference Result 21061 states and 29029 transitions. [2022-11-03 03:53:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:53:33,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 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 359 [2022-11-03 03:53:33,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:33,526 INFO L225 Difference]: With dead ends: 21061 [2022-11-03 03:53:33,526 INFO L226 Difference]: Without dead ends: 15438 [2022-11-03 03:53:33,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:53:33,531 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 852 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:33,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 1598 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:53:33,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15438 states. [2022-11-03 03:53:33,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15438 to 6023. [2022-11-03 03:53:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6023 states, 6022 states have (on average 1.3777814679508469) internal successors, (8297), 6022 states have internal predecessors, (8297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 8297 transitions. [2022-11-03 03:53:33,642 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 8297 transitions. Word has length 359 [2022-11-03 03:53:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:33,642 INFO L495 AbstractCegarLoop]: Abstraction has 6023 states and 8297 transitions. [2022-11-03 03:53:33,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 8297 transitions. [2022-11-03 03:53:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:53:33,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:33,648 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:53:33,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (122)] Ended with exit code 0 [2022-11-03 03:53:33,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (121)] Ended with exit code 0 [2022-11-03 03:53:34,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:34,049 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash -943616271, now seen corresponding path program 1 times [2022-11-03 03:53:34,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:34,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507624346] [2022-11-03 03:53:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:34,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:34,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:34,052 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:34,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-03 03:53:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:34,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:53:34,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 165 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:35,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 165 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:35,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:35,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507624346] [2022-11-03 03:53:35,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507624346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:35,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1035552482] [2022-11-03 03:53:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:35,903 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:35,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:35,903 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:35,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (124)] Waiting until timeout for monitored process [2022-11-03 03:53:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:37,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:53:37,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:53:38,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:53:40,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1035552482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:40,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939746470] [2022-11-03 03:53:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:40,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:40,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:40,028 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:40,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-11-03 03:53:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:40,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:53:40,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 151 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:53:41,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 151 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:53:42,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939746470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:42,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:53:42,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 6, 6] total 37 [2022-11-03 03:53:42,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463538987] [2022-11-03 03:53:42,409 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:53:42,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 03:53:42,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 03:53:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 03:53:42,412 INFO L87 Difference]: Start difference. First operand 6023 states and 8297 transitions. Second operand has 37 states, 37 states have (on average 38.2972972972973) internal successors, (1417), 37 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:48,104 INFO L93 Difference]: Finished difference Result 24352 states and 33701 transitions. [2022-11-03 03:53:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-03 03:53:48,105 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 38.2972972972973) internal successors, (1417), 37 states have internal predecessors, (1417), 0 states have call successors, (0), 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 359 [2022-11-03 03:53:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:48,114 INFO L225 Difference]: With dead ends: 24352 [2022-11-03 03:53:48,114 INFO L226 Difference]: Without dead ends: 18866 [2022-11-03 03:53:48,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2221 GetRequests, 2114 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2529 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1425, Invalid=10347, Unknown=0, NotChecked=0, Total=11772 [2022-11-03 03:53:48,120 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 5680 mSDsluCounter, 12604 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5680 SdHoareTripleChecker+Valid, 13111 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1557 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:48,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5680 Valid, 13111 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1471 Invalid, 0 Unknown, 1557 Unchecked, 1.4s Time] [2022-11-03 03:53:48,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18866 states. [2022-11-03 03:53:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18866 to 4878. [2022-11-03 03:53:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4878 states, 4877 states have (on average 1.3672339553003896) internal successors, (6668), 4877 states have internal predecessors, (6668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4878 states to 4878 states and 6668 transitions. [2022-11-03 03:53:48,208 INFO L78 Accepts]: Start accepts. Automaton has 4878 states and 6668 transitions. Word has length 359 [2022-11-03 03:53:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:48,208 INFO L495 AbstractCegarLoop]: Abstraction has 4878 states and 6668 transitions. [2022-11-03 03:53:48,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 38.2972972972973) internal successors, (1417), 37 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 4878 states and 6668 transitions. [2022-11-03 03:53:48,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:53:48,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:48,211 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:53:48,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (123)] Ended with exit code 0 [2022-11-03 03:53:48,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (124)] Ended with exit code 0 [2022-11-03 03:53:48,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-11-03 03:53:48,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:48,812 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:48,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:48,813 INFO L85 PathProgramCache]: Analyzing trace with hash 684486133, now seen corresponding path program 1 times [2022-11-03 03:53:48,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:48,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943860958] [2022-11-03 03:53:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:48,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:48,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:48,815 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:48,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-03 03:53:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:49,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:53:49,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 149 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:53:50,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 149 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:53:51,098 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:51,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943860958] [2022-11-03 03:53:51,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943860958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:51,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [873433243] [2022-11-03 03:53:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:51,099 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:51,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:51,100 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:51,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (127)] Waiting until timeout for monitored process [2022-11-03 03:53:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:52,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:53:52,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 37 proven. 39 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:53:53,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 37 proven. 39 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:53:54,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [873433243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:54,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082314842] [2022-11-03 03:53:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:54,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:54,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:54,912 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:54,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-11-03 03:53:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:55,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:53:55,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 149 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:53:56,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 149 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:53:57,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082314842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:57,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:53:57,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 11, 11, 6, 6] total 25 [2022-11-03 03:53:57,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293230720] [2022-11-03 03:53:57,109 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:53:57,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 03:53:57,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 03:53:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:53:57,111 INFO L87 Difference]: Start difference. First operand 4878 states and 6668 transitions. Second operand has 25 states, 25 states have (on average 41.04) internal successors, (1026), 25 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:04,770 INFO L93 Difference]: Finished difference Result 66800 states and 92811 transitions. [2022-11-03 03:54:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-03 03:54:04,772 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 41.04) internal successors, (1026), 25 states have internal predecessors, (1026), 0 states have call successors, (0), 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 359 [2022-11-03 03:54:04,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:04,812 INFO L225 Difference]: With dead ends: 66800 [2022-11-03 03:54:04,813 INFO L226 Difference]: Without dead ends: 62529 [2022-11-03 03:54:04,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2261 GetRequests, 2124 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6010 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3509, Invalid=15397, Unknown=0, NotChecked=0, Total=18906 [2022-11-03 03:54:04,827 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 11684 mSDsluCounter, 7834 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11684 SdHoareTripleChecker+Valid, 8368 SdHoareTripleChecker+Invalid, 3413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2193 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:04,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11684 Valid, 8368 Invalid, 3413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1086 Invalid, 0 Unknown, 2193 Unchecked, 1.4s Time] [2022-11-03 03:54:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62529 states. [2022-11-03 03:54:05,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62529 to 4948. [2022-11-03 03:54:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4948 states, 4947 states have (on average 1.3620375985445725) internal successors, (6738), 4947 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:05,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4948 states to 4948 states and 6738 transitions. [2022-11-03 03:54:05,100 INFO L78 Accepts]: Start accepts. Automaton has 4948 states and 6738 transitions. Word has length 359 [2022-11-03 03:54:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:05,101 INFO L495 AbstractCegarLoop]: Abstraction has 4948 states and 6738 transitions. [2022-11-03 03:54:05,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 41.04) internal successors, (1026), 25 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4948 states and 6738 transitions. [2022-11-03 03:54:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:54:05,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:05,104 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:54:05,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (127)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:05,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:05,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-11-03 03:54:05,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:05,705 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:05,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1729880057, now seen corresponding path program 1 times [2022-11-03 03:54:05,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:05,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009111669] [2022-11-03 03:54:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:05,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:05,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:05,708 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:05,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2022-11-03 03:54:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:06,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:54:06,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 147 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:07,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 147 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:08,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:08,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009111669] [2022-11-03 03:54:08,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009111669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:08,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [331575929] [2022-11-03 03:54:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:08,023 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:08,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:08,024 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:08,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (130)] Waiting until timeout for monitored process [2022-11-03 03:54:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:09,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:54:09,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:54:10,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:54:11,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [331575929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:11,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115067509] [2022-11-03 03:54:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:11,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:11,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:11,796 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:11,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-11-03 03:54:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:12,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:54:12,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 147 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:13,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 147 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:14,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115067509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:14,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:14,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 11, 11, 6, 6] total 25 [2022-11-03 03:54:14,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341042661] [2022-11-03 03:54:14,189 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:14,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 03:54:14,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:14,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 03:54:14,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:54:14,190 INFO L87 Difference]: Start difference. First operand 4948 states and 6738 transitions. Second operand has 25 states, 25 states have (on average 41.12) internal successors, (1028), 25 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:20,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:20,078 INFO L93 Difference]: Finished difference Result 47619 states and 65636 transitions. [2022-11-03 03:54:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-03 03:54:20,079 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 41.12) internal successors, (1028), 25 states have internal predecessors, (1028), 0 states have call successors, (0), 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 359 [2022-11-03 03:54:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:20,104 INFO L225 Difference]: With dead ends: 47619 [2022-11-03 03:54:20,104 INFO L226 Difference]: Without dead ends: 43310 [2022-11-03 03:54:20,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2232 GetRequests, 2124 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3091 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2326, Invalid=9446, Unknown=0, NotChecked=0, Total=11772 [2022-11-03 03:54:20,114 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 8049 mSDsluCounter, 9157 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8049 SdHoareTripleChecker+Valid, 9955 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1388 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:20,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8049 Valid, 9955 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1068 Invalid, 0 Unknown, 1388 Unchecked, 1.3s Time] [2022-11-03 03:54:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43310 states. [2022-11-03 03:54:20,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43310 to 5018. [2022-11-03 03:54:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5017 states have (on average 1.3569862467610125) internal successors, (6808), 5017 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 6808 transitions. [2022-11-03 03:54:20,283 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 6808 transitions. Word has length 359 [2022-11-03 03:54:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:20,283 INFO L495 AbstractCegarLoop]: Abstraction has 5018 states and 6808 transitions. [2022-11-03 03:54:20,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 41.12) internal successors, (1028), 25 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 6808 transitions. [2022-11-03 03:54:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:54:20,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:20,286 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:54:20,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:20,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (129)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:20,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (130)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:20,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:20,887 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:20,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:20,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1477967107, now seen corresponding path program 1 times [2022-11-03 03:54:20,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:20,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374897673] [2022-11-03 03:54:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:20,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:20,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:20,890 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:20,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-03 03:54:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:54:21,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 145 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:22,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 145 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:23,185 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:23,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374897673] [2022-11-03 03:54:23,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374897673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:23,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1643436934] [2022-11-03 03:54:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:23,185 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:23,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:23,186 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:23,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (133)] Waiting until timeout for monitored process [2022-11-03 03:54:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:24,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:54:24,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:54:25,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:54:27,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1643436934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:27,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217257926] [2022-11-03 03:54:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:27,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:27,109 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:27,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-11-03 03:54:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:27,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:54:27,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 145 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:28,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 145 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:29,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217257926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:29,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:29,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12, 12, 6, 6] total 27 [2022-11-03 03:54:29,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087413142] [2022-11-03 03:54:29,518 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:29,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:54:29,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:54:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:54:29,520 INFO L87 Difference]: Start difference. First operand 5018 states and 6808 transitions. Second operand has 27 states, 27 states have (on average 38.2962962962963) internal successors, (1034), 27 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:33,585 INFO L93 Difference]: Finished difference Result 36005 states and 49567 transitions. [2022-11-03 03:54:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-03 03:54:33,585 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 38.2962962962963) internal successors, (1034), 27 states have internal predecessors, (1034), 0 states have call successors, (0), 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 359 [2022-11-03 03:54:33,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:33,603 INFO L225 Difference]: With dead ends: 36005 [2022-11-03 03:54:33,603 INFO L226 Difference]: Without dead ends: 31658 [2022-11-03 03:54:33,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2209 GetRequests, 2125 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1288, Invalid=5852, Unknown=0, NotChecked=0, Total=7140 [2022-11-03 03:54:33,611 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 7869 mSDsluCounter, 7156 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7869 SdHoareTripleChecker+Valid, 7855 SdHoareTripleChecker+Invalid, 2525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1898 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:33,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7869 Valid, 7855 Invalid, 2525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 571 Invalid, 0 Unknown, 1898 Unchecked, 0.8s Time] [2022-11-03 03:54:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31658 states. [2022-11-03 03:54:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31658 to 5094. [2022-11-03 03:54:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 5093 states have (on average 1.3522481837816611) internal successors, (6887), 5093 states have internal predecessors, (6887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 6887 transitions. [2022-11-03 03:54:33,747 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 6887 transitions. Word has length 359 [2022-11-03 03:54:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:33,748 INFO L495 AbstractCegarLoop]: Abstraction has 5094 states and 6887 transitions. [2022-11-03 03:54:33,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 38.2962962962963) internal successors, (1034), 27 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 6887 transitions. [2022-11-03 03:54:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:54:33,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:33,753 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:54:33,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (132)] Ended with exit code 0 [2022-11-03 03:54:33,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-11-03 03:54:34,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (133)] Ended with exit code 0 [2022-11-03 03:54:34,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:34,361 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1120612225, now seen corresponding path program 1 times [2022-11-03 03:54:34,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:34,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463476022] [2022-11-03 03:54:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:34,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:34,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:34,364 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:34,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-03 03:54:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:35,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:54:35,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 141 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:35,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 141 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:36,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:36,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463476022] [2022-11-03 03:54:36,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463476022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:36,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1121936814] [2022-11-03 03:54:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:36,759 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:36,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:36,760 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:36,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (136)] Waiting until timeout for monitored process [2022-11-03 03:54:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:38,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:54:38,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:54:39,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:54:40,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1121936814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:40,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579679172] [2022-11-03 03:54:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:40,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:40,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:40,731 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:40,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-11-03 03:54:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:41,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:54:41,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 141 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:41,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 141 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:42,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579679172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:42,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:42,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12, 12, 6, 6] total 27 [2022-11-03 03:54:42,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679379602] [2022-11-03 03:54:42,931 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:42,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:54:42,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:42,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:54:42,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:54:42,933 INFO L87 Difference]: Start difference. First operand 5094 states and 6887 transitions. Second operand has 27 states, 27 states have (on average 38.370370370370374) internal successors, (1036), 27 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:49,501 INFO L93 Difference]: Finished difference Result 49175 states and 67263 transitions. [2022-11-03 03:54:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-03 03:54:49,502 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 38.370370370370374) internal successors, (1036), 27 states have internal predecessors, (1036), 0 states have call successors, (0), 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 359 [2022-11-03 03:54:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:49,526 INFO L225 Difference]: With dead ends: 49175 [2022-11-03 03:54:49,526 INFO L226 Difference]: Without dead ends: 44800 [2022-11-03 03:54:49,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2238 GetRequests, 2125 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2385, Invalid=10497, Unknown=0, NotChecked=0, Total=12882 [2022-11-03 03:54:49,535 INFO L413 NwaCegarLoop]: 929 mSDtfsCounter, 6769 mSDsluCounter, 10774 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6769 SdHoareTripleChecker+Valid, 11703 SdHoareTripleChecker+Invalid, 4051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2788 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:49,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6769 Valid, 11703 Invalid, 4051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1216 Invalid, 0 Unknown, 2788 Unchecked, 1.4s Time] [2022-11-03 03:54:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44800 states. [2022-11-03 03:54:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44800 to 5228. [2022-11-03 03:54:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5228 states, 5227 states have (on average 1.3493399655634206) internal successors, (7053), 5227 states have internal predecessors, (7053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5228 states to 5228 states and 7053 transitions. [2022-11-03 03:54:49,703 INFO L78 Accepts]: Start accepts. Automaton has 5228 states and 7053 transitions. Word has length 359 [2022-11-03 03:54:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:49,703 INFO L495 AbstractCegarLoop]: Abstraction has 5228 states and 7053 transitions. [2022-11-03 03:54:49,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 38.370370370370374) internal successors, (1036), 27 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 5228 states and 7053 transitions. [2022-11-03 03:54:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:54:49,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:49,706 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:54:49,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (135)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:49,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-11-03 03:54:50,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (136)] Ended with exit code 0 [2022-11-03 03:54:50,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:50,308 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:50,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1944132219, now seen corresponding path program 1 times [2022-11-03 03:54:50,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:50,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731970534] [2022-11-03 03:54:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:50,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:50,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:50,311 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:50,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-03 03:54:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:50,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:54:51,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 139 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:54:51,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 139 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:54:52,688 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:52,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731970534] [2022-11-03 03:54:52,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731970534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:52,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1641623776] [2022-11-03 03:54:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:52,689 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:52,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:52,690 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:52,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (139)] Waiting until timeout for monitored process [2022-11-03 03:54:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:54:54,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:54:55,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:54:56,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1641623776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:56,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976634295] [2022-11-03 03:54:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:56,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:56,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:56,709 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:56,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-11-03 03:54:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:57,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:54:57,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 139 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:54:58,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 139 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:54:58,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976634295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:58,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:58,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 12, 12, 7, 7] total 30 [2022-11-03 03:54:58,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105366212] [2022-11-03 03:54:58,926 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:58,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 03:54:58,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 03:54:58,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:54:58,929 INFO L87 Difference]: Start difference. First operand 5228 states and 7053 transitions. Second operand has 30 states, 30 states have (on average 36.36666666666667) internal successors, (1091), 30 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:55:05,844 INFO L93 Difference]: Finished difference Result 34940 states and 47455 transitions. [2022-11-03 03:55:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-03 03:55:05,845 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 36.36666666666667) internal successors, (1091), 30 states have internal predecessors, (1091), 0 states have call successors, (0), 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 359 [2022-11-03 03:55:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:55:05,864 INFO L225 Difference]: With dead ends: 34940 [2022-11-03 03:55:05,864 INFO L226 Difference]: Without dead ends: 31175 [2022-11-03 03:55:05,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2232 GetRequests, 2122 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2901 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2668, Invalid=9542, Unknown=0, NotChecked=0, Total=12210 [2022-11-03 03:55:05,871 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 7904 mSDsluCounter, 8274 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7904 SdHoareTripleChecker+Valid, 8945 SdHoareTripleChecker+Invalid, 2538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1343 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:55:05,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7904 Valid, 8945 Invalid, 2538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1120 Invalid, 0 Unknown, 1343 Unchecked, 1.5s Time] [2022-11-03 03:55:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2022-11-03 03:55:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 5420. [2022-11-03 03:55:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5420 states, 5419 states have (on average 1.3472965491788154) internal successors, (7301), 5419 states have internal predecessors, (7301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5420 states to 5420 states and 7301 transitions. [2022-11-03 03:55:06,009 INFO L78 Accepts]: Start accepts. Automaton has 5420 states and 7301 transitions. Word has length 359 [2022-11-03 03:55:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:55:06,009 INFO L495 AbstractCegarLoop]: Abstraction has 5420 states and 7301 transitions. [2022-11-03 03:55:06,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 36.36666666666667) internal successors, (1091), 30 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 5420 states and 7301 transitions. [2022-11-03 03:55:06,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:55:06,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:06,013 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:55:06,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (138)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:06,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:06,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (139)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:06,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:55:06,615 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:55:06,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:06,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1808774007, now seen corresponding path program 1 times [2022-11-03 03:55:06,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:55:06,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314019607] [2022-11-03 03:55:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:06,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:55:06,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:55:06,617 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:55:06,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2022-11-03 03:55:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:07,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:55:07,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 137 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:55:08,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 137 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:55:09,058 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:55:09,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314019607] [2022-11-03 03:55:09,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314019607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:09,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [731059685] [2022-11-03 03:55:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:09,058 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:55:09,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:55:09,059 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:55:09,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (142)] Waiting until timeout for monitored process [2022-11-03 03:55:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:10,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:55:10,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:55:11,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:55:13,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [731059685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:13,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405229549] [2022-11-03 03:55:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:13,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:55:13,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:55:13,113 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:55:13,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-11-03 03:55:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:13,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:55:13,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 137 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:55:14,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 137 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:55:15,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405229549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:15,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:55:15,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12, 12, 8, 8] total 31 [2022-11-03 03:55:15,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468541263] [2022-11-03 03:55:15,402 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:55:15,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 03:55:15,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:55:15,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 03:55:15,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2022-11-03 03:55:15,403 INFO L87 Difference]: Start difference. First operand 5420 states and 7301 transitions. Second operand has 31 states, 31 states have (on average 35.25806451612903) internal successors, (1093), 31 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:55:29,724 INFO L93 Difference]: Finished difference Result 59201 states and 80303 transitions. [2022-11-03 03:55:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-11-03 03:55:29,725 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 35.25806451612903) internal successors, (1093), 31 states have internal predecessors, (1093), 0 states have call successors, (0), 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 359 [2022-11-03 03:55:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:55:29,753 INFO L225 Difference]: With dead ends: 59201 [2022-11-03 03:55:29,753 INFO L226 Difference]: Without dead ends: 55292 [2022-11-03 03:55:29,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2316 GetRequests, 2120 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12811 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=6938, Invalid=31674, Unknown=0, NotChecked=0, Total=38612 [2022-11-03 03:55:29,761 INFO L413 NwaCegarLoop]: 890 mSDtfsCounter, 10483 mSDsluCounter, 15070 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10483 SdHoareTripleChecker+Valid, 15960 SdHoareTripleChecker+Invalid, 5521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3150 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:55:29,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10483 Valid, 15960 Invalid, 5521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2274 Invalid, 0 Unknown, 3150 Unchecked, 2.7s Time] [2022-11-03 03:55:29,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55292 states. [2022-11-03 03:55:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55292 to 5434. [2022-11-03 03:55:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5434 states, 5433 states have (on average 1.3464016197312718) internal successors, (7315), 5433 states have internal predecessors, (7315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:29,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5434 states to 5434 states and 7315 transitions. [2022-11-03 03:55:29,951 INFO L78 Accepts]: Start accepts. Automaton has 5434 states and 7315 transitions. Word has length 359 [2022-11-03 03:55:29,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:55:29,951 INFO L495 AbstractCegarLoop]: Abstraction has 5434 states and 7315 transitions. [2022-11-03 03:55:29,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 35.25806451612903) internal successors, (1093), 31 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:29,951 INFO L276 IsEmpty]: Start isEmpty. Operand 5434 states and 7315 transitions. [2022-11-03 03:55:29,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:55:29,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:29,954 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:55:29,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (142)] Ended with exit code 0 [2022-11-03 03:55:30,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-11-03 03:55:30,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (141)] Ended with exit code 0 [2022-11-03 03:55:30,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:55:30,555 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:55:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1598577523, now seen corresponding path program 1 times [2022-11-03 03:55:30,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:55:30,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950155592] [2022-11-03 03:55:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:30,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:55:30,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:55:30,558 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:55:30,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2022-11-03 03:55:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:31,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:55:31,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 127 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:55:32,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 127 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:55:32,487 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:55:32,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950155592] [2022-11-03 03:55:32,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950155592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:32,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [281940400] [2022-11-03 03:55:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:32,488 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:55:32,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:55:32,488 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:55:32,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (145)] Waiting until timeout for monitored process [2022-11-03 03:55:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:33,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:55:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:55:35,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:55:36,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [281940400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:36,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292388663] [2022-11-03 03:55:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:36,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:55:36,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:55:36,552 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:55:36,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-11-03 03:55:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:55:37,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 127 proven. 37 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:55:38,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 127 proven. 37 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:55:39,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292388663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:39,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:55:39,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 8, 8] total 38 [2022-11-03 03:55:39,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240684136] [2022-11-03 03:55:39,149 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:55:39,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:55:39,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:55:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:55:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:55:39,151 INFO L87 Difference]: Start difference. First operand 5434 states and 7315 transitions. Second operand has 38 states, 38 states have (on average 38.36842105263158) internal successors, (1458), 38 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:02,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:02,031 INFO L93 Difference]: Finished difference Result 113422 states and 154241 transitions. [2022-11-03 03:56:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2022-11-03 03:56:02,032 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 38.36842105263158) internal successors, (1458), 38 states have internal predecessors, (1458), 0 states have call successors, (0), 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 359 [2022-11-03 03:56:02,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:02,095 INFO L225 Difference]: With dead ends: 113422 [2022-11-03 03:56:02,095 INFO L226 Difference]: Without dead ends: 108899 [2022-11-03 03:56:02,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2411 GetRequests, 2122 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31113 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=9788, Invalid=74602, Unknown=0, NotChecked=0, Total=84390 [2022-11-03 03:56:02,111 INFO L413 NwaCegarLoop]: 1940 mSDtfsCounter, 17518 mSDsluCounter, 45789 mSDsCounter, 0 mSdLazyCounter, 6243 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17518 SdHoareTripleChecker+Valid, 47729 SdHoareTripleChecker+Invalid, 14793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 6243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8309 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:02,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17518 Valid, 47729 Invalid, 14793 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [241 Valid, 6243 Invalid, 0 Unknown, 8309 Unchecked, 6.1s Time] [2022-11-03 03:56:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108899 states. [2022-11-03 03:56:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108899 to 11601. [2022-11-03 03:56:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11601 states, 11600 states have (on average 1.3482758620689654) internal successors, (15640), 11600 states have internal predecessors, (15640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11601 states to 11601 states and 15640 transitions. [2022-11-03 03:56:02,708 INFO L78 Accepts]: Start accepts. Automaton has 11601 states and 15640 transitions. Word has length 359 [2022-11-03 03:56:02,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:02,709 INFO L495 AbstractCegarLoop]: Abstraction has 11601 states and 15640 transitions. [2022-11-03 03:56:02,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 38.36842105263158) internal successors, (1458), 38 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 11601 states and 15640 transitions. [2022-11-03 03:56:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:56:02,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:02,715 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:02,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (145)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:02,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (144)] Ended with exit code 0 [2022-11-03 03:56:03,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-11-03 03:56:03,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:03,326 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:03,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:03,326 INFO L85 PathProgramCache]: Analyzing trace with hash 456445841, now seen corresponding path program 1 times [2022-11-03 03:56:03,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:03,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034053106] [2022-11-03 03:56:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:03,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:03,329 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:03,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2022-11-03 03:56:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:04,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:56:04,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:04,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:05,910 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034053106] [2022-11-03 03:56:05,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034053106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1843157353] [2022-11-03 03:56:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:05,911 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:05,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:05,911 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:05,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (148)] Waiting until timeout for monitored process [2022-11-03 03:56:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:56:07,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:56:08,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:56:10,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1843157353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:10,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866029938] [2022-11-03 03:56:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:10,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:10,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:10,469 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:10,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-11-03 03:56:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:11,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:56:11,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:11,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:12,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866029938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:12,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:12,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 12, 12, 7, 7] total 30 [2022-11-03 03:56:12,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362007504] [2022-11-03 03:56:12,986 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:12,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 03:56:12,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:12,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 03:56:12,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:56:12,988 INFO L87 Difference]: Start difference. First operand 11601 states and 15640 transitions. Second operand has 30 states, 30 states have (on average 37.3) internal successors, (1119), 30 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:21,825 INFO L93 Difference]: Finished difference Result 93874 states and 126979 transitions. [2022-11-03 03:56:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-03 03:56:21,826 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 37.3) internal successors, (1119), 30 states have internal predecessors, (1119), 0 states have call successors, (0), 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 359 [2022-11-03 03:56:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:21,873 INFO L225 Difference]: With dead ends: 93874 [2022-11-03 03:56:21,873 INFO L226 Difference]: Without dead ends: 85290 [2022-11-03 03:56:21,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2239 GetRequests, 2119 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3498 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=3106, Invalid=11414, Unknown=0, NotChecked=0, Total=14520 [2022-11-03 03:56:21,890 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 7615 mSDsluCounter, 9348 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7615 SdHoareTripleChecker+Valid, 10178 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1470 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:21,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7615 Valid, 10178 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1343 Invalid, 0 Unknown, 1470 Unchecked, 1.8s Time] [2022-11-03 03:56:21,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85290 states. [2022-11-03 03:56:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85290 to 11803. [2022-11-03 03:56:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11803 states, 11802 states have (on average 1.347483477376716) internal successors, (15903), 11802 states have internal predecessors, (15903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:22,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11803 states to 11803 states and 15903 transitions. [2022-11-03 03:56:22,262 INFO L78 Accepts]: Start accepts. Automaton has 11803 states and 15903 transitions. Word has length 359 [2022-11-03 03:56:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:22,262 INFO L495 AbstractCegarLoop]: Abstraction has 11803 states and 15903 transitions. [2022-11-03 03:56:22,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 37.3) internal successors, (1119), 30 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 11803 states and 15903 transitions. [2022-11-03 03:56:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:56:22,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:22,268 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:22,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:22,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (147)] Ended with exit code 0 [2022-11-03 03:56:22,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (148)] Ended with exit code 0 [2022-11-03 03:56:22,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:22,884 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:22,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:22,884 INFO L85 PathProgramCache]: Analyzing trace with hash -842855019, now seen corresponding path program 1 times [2022-11-03 03:56:22,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:22,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9622132] [2022-11-03 03:56:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:22,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:22,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:22,886 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:22,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2022-11-03 03:56:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:23,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:56:23,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 113 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:24,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 113 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:25,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:25,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9622132] [2022-11-03 03:56:25,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9622132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:25,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1590755932] [2022-11-03 03:56:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:25,022 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:25,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:25,023 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:25,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (151)] Waiting until timeout for monitored process [2022-11-03 03:56:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:26,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:56:26,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 19 proven. 57 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:56:27,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 19 proven. 57 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:56:29,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1590755932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:29,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129321314] [2022-11-03 03:56:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:29,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:29,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:29,304 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:29,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-11-03 03:56:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:29,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:56:29,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 113 proven. 51 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:56:30,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 113 proven. 51 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:56:32,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129321314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:32,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:32,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 12, 8, 8] total 40 [2022-11-03 03:56:32,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964798996] [2022-11-03 03:56:32,028 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:32,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:56:32,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:32,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:56:32,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1452, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:56:32,030 INFO L87 Difference]: Start difference. First operand 11803 states and 15903 transitions. Second operand has 40 states, 40 states have (on average 38.55) internal successors, (1542), 40 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:59,227 INFO L93 Difference]: Finished difference Result 99287 states and 134592 transitions. [2022-11-03 03:56:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 303 states. [2022-11-03 03:56:59,228 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 38.55) internal successors, (1542), 40 states have internal predecessors, (1542), 0 states have call successors, (0), 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 359 [2022-11-03 03:56:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:59,271 INFO L225 Difference]: With dead ends: 99287 [2022-11-03 03:56:59,271 INFO L226 Difference]: Without dead ends: 90329 [2022-11-03 03:56:59,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2501 GetRequests, 2124 SyntacticMatches, 39 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49649 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=11740, Invalid=103520, Unknown=0, NotChecked=0, Total=115260 [2022-11-03 03:56:59,288 INFO L413 NwaCegarLoop]: 2758 mSDtfsCounter, 11746 mSDsluCounter, 57639 mSDsCounter, 0 mSdLazyCounter, 5246 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11746 SdHoareTripleChecker+Valid, 60397 SdHoareTripleChecker+Invalid, 11550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 5246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6212 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:59,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11746 Valid, 60397 Invalid, 11550 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [92 Valid, 5246 Invalid, 0 Unknown, 6212 Unchecked, 5.1s Time] [2022-11-03 03:56:59,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90329 states. [2022-11-03 03:56:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90329 to 12157. [2022-11-03 03:56:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12157 states, 12156 states have (on average 1.3488812109246462) internal successors, (16397), 12156 states have internal predecessors, (16397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12157 states to 12157 states and 16397 transitions. [2022-11-03 03:56:59,657 INFO L78 Accepts]: Start accepts. Automaton has 12157 states and 16397 transitions. Word has length 359 [2022-11-03 03:56:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:59,658 INFO L495 AbstractCegarLoop]: Abstraction has 12157 states and 16397 transitions. [2022-11-03 03:56:59,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 38.55) internal successors, (1542), 40 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 12157 states and 16397 transitions. [2022-11-03 03:56:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:56:59,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:59,664 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:59,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (150)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:59,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-11-03 03:57:00,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (151)] Ended with exit code 0 [2022-11-03 03:57:00,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:00,288 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:00,288 INFO L85 PathProgramCache]: Analyzing trace with hash -804653799, now seen corresponding path program 1 times [2022-11-03 03:57:00,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:00,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467160186] [2022-11-03 03:57:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:00,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:00,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:00,290 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:00,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2022-11-03 03:57:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:00,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:57:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 105 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:01,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 105 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:02,422 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467160186] [2022-11-03 03:57:02,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467160186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1928849727] [2022-11-03 03:57:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:02,422 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:02,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:57:02,423 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:57:02,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (154)] Waiting until timeout for monitored process [2022-11-03 03:57:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:04,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:57:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 17 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:57:05,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 17 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:57:06,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1928849727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:06,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573602792] [2022-11-03 03:57:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:06,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:06,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:06,792 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:06,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-11-03 03:57:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:07,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:57:07,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 105 proven. 59 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:57:08,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 105 proven. 59 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:57:09,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573602792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:09,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:57:09,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 12, 8, 8] total 40 [2022-11-03 03:57:09,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069991967] [2022-11-03 03:57:09,556 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:09,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:57:09,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:09,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:57:09,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1452, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:57:09,557 INFO L87 Difference]: Start difference. First operand 12157 states and 16397 transitions. Second operand has 40 states, 40 states have (on average 39.0) internal successors, (1560), 40 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:51,984 INFO L93 Difference]: Finished difference Result 208259 states and 283185 transitions. [2022-11-03 03:57:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 456 states. [2022-11-03 03:57:51,984 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 39.0) internal successors, (1560), 40 states have internal predecessors, (1560), 0 states have call successors, (0), 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 359 [2022-11-03 03:57:51,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:52,299 INFO L225 Difference]: With dead ends: 208259 [2022-11-03 03:57:52,299 INFO L226 Difference]: Without dead ends: 199097 [2022-11-03 03:57:52,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2652 GetRequests, 2131 SyntacticMatches, 30 SemanticMatches, 491 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107317 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=22013, Invalid=220543, Unknown=0, NotChecked=0, Total=242556 [2022-11-03 03:57:52,331 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 22382 mSDsluCounter, 68363 mSDsCounter, 0 mSdLazyCounter, 8243 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22382 SdHoareTripleChecker+Valid, 71522 SdHoareTripleChecker+Invalid, 30034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 8243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21609 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:52,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22382 Valid, 71522 Invalid, 30034 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [182 Valid, 8243 Invalid, 0 Unknown, 21609 Unchecked, 8.4s Time] [2022-11-03 03:57:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199097 states. [2022-11-03 03:57:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199097 to 13523. [2022-11-03 03:57:53,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13523 states, 13522 states have (on average 1.3483212542523295) internal successors, (18232), 13522 states have internal predecessors, (18232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13523 states to 13523 states and 18232 transitions. [2022-11-03 03:57:53,303 INFO L78 Accepts]: Start accepts. Automaton has 13523 states and 18232 transitions. Word has length 359 [2022-11-03 03:57:53,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:53,304 INFO L495 AbstractCegarLoop]: Abstraction has 13523 states and 18232 transitions. [2022-11-03 03:57:53,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 39.0) internal successors, (1560), 40 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:53,304 INFO L276 IsEmpty]: Start isEmpty. Operand 13523 states and 18232 transitions. [2022-11-03 03:57:53,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:57:53,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:53,310 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:53,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (153)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:53,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (154)] Ended with exit code 0 [2022-11-03 03:57:53,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-11-03 03:57:53,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:53,924 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:53,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:53,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2020407069, now seen corresponding path program 1 times [2022-11-03 03:57:53,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:53,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651799300] [2022-11-03 03:57:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:53,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:53,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:53,926 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:53,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2022-11-03 03:57:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:54,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:57:54,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 93 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:57:55,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 93 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:57:56,532 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:56,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651799300] [2022-11-03 03:57:56,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651799300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:56,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1197728071] [2022-11-03 03:57:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:56,532 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:56,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:57:56,533 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:57:56,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (157)] Waiting until timeout for monitored process [2022-11-03 03:57:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:58,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:57:58,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 13 proven. 63 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:57:59,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 13 proven. 63 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:58:00,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1197728071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:00,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451102847] [2022-11-03 03:58:00,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:00,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:00,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:00,717 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:00,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-11-03 03:58:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:01,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:58:01,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 93 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:02,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 93 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:03,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451102847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:03,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:58:03,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 11, 8, 8] total 29 [2022-11-03 03:58:03,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680765546] [2022-11-03 03:58:03,172 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:03,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 03:58:03,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:58:03,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 03:58:03,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:58:03,173 INFO L87 Difference]: Start difference. First operand 13523 states and 18232 transitions. Second operand has 29 states, 29 states have (on average 39.827586206896555) internal successors, (1155), 29 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:16,870 INFO L93 Difference]: Finished difference Result 164278 states and 221800 transitions. [2022-11-03 03:58:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-03 03:58:16,871 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 39.827586206896555) internal successors, (1155), 29 states have internal predecessors, (1155), 0 states have call successors, (0), 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 359 [2022-11-03 03:58:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:16,951 INFO L225 Difference]: With dead ends: 164278 [2022-11-03 03:58:16,952 INFO L226 Difference]: Without dead ends: 154024 [2022-11-03 03:58:16,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2298 GetRequests, 2120 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9935 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=5954, Invalid=25908, Unknown=0, NotChecked=0, Total=31862 [2022-11-03 03:58:16,968 INFO L413 NwaCegarLoop]: 1088 mSDtfsCounter, 10360 mSDsluCounter, 14587 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10360 SdHoareTripleChecker+Valid, 15675 SdHoareTripleChecker+Invalid, 5403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3032 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:16,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10360 Valid, 15675 Invalid, 5403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2290 Invalid, 0 Unknown, 3032 Unchecked, 2.6s Time] [2022-11-03 03:58:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154024 states. [2022-11-03 03:58:17,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154024 to 13779. [2022-11-03 03:58:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13779 states, 13778 states have (on average 1.34678472927856) internal successors, (18556), 13778 states have internal predecessors, (18556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13779 states to 13779 states and 18556 transitions. [2022-11-03 03:58:17,741 INFO L78 Accepts]: Start accepts. Automaton has 13779 states and 18556 transitions. Word has length 359 [2022-11-03 03:58:17,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:17,741 INFO L495 AbstractCegarLoop]: Abstraction has 13779 states and 18556 transitions. [2022-11-03 03:58:17,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 39.827586206896555) internal successors, (1155), 29 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand 13779 states and 18556 transitions. [2022-11-03 03:58:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:58:17,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:17,746 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:17,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (157)] Ended with exit code 0 [2022-11-03 03:58:17,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (156)] Ended with exit code 0 [2022-11-03 03:58:18,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-11-03 03:58:18,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:18,347 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:18,347 INFO L85 PathProgramCache]: Analyzing trace with hash 550092065, now seen corresponding path program 1 times [2022-11-03 03:58:18,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:58:18,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705211505] [2022-11-03 03:58:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:18,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:58:18,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:58:18,350 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:58:18,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (159)] Waiting until timeout for monitored process [2022-11-03 03:58:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:19,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:58:19,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 87 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:20,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 87 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:20,525 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:58:20,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705211505] [2022-11-03 03:58:20,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705211505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:20,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1125432230] [2022-11-03 03:58:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:20,525 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:58:20,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:58:20,526 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:58:20,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (160)] Waiting until timeout for monitored process [2022-11-03 03:58:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:21,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:58:21,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-03 03:58:21,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:58:21,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1125432230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:21,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:58:21,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 17 [2022-11-03 03:58:21,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089398700] [2022-11-03 03:58:21,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:21,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:58:21,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:58:21,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:58:21,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:58:21,960 INFO L87 Difference]: Start difference. First operand 13779 states and 18556 transitions. Second operand has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:22,642 INFO L93 Difference]: Finished difference Result 56906 states and 76704 transitions. [2022-11-03 03:58:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:58:22,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 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 359 [2022-11-03 03:58:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:22,663 INFO L225 Difference]: With dead ends: 56906 [2022-11-03 03:58:22,663 INFO L226 Difference]: Without dead ends: 43353 [2022-11-03 03:58:22,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:58:22,668 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 817 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:22,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 1965 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:58:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43353 states. [2022-11-03 03:58:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43353 to 16691. [2022-11-03 03:58:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16691 states, 16690 states have (on average 1.3459556620730977) internal successors, (22464), 16690 states have internal predecessors, (22464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16691 states to 16691 states and 22464 transitions. [2022-11-03 03:58:22,915 INFO L78 Accepts]: Start accepts. Automaton has 16691 states and 22464 transitions. Word has length 359 [2022-11-03 03:58:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:22,916 INFO L495 AbstractCegarLoop]: Abstraction has 16691 states and 22464 transitions. [2022-11-03 03:58:22,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 16691 states and 22464 transitions. [2022-11-03 03:58:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:58:22,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:22,924 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:22,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (160)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:23,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (159)] Ended with exit code 0 [2022-11-03 03:58:23,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:58:23,325 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:23,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1110791843, now seen corresponding path program 1 times [2022-11-03 03:58:23,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:58:23,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917580810] [2022-11-03 03:58:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:23,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:58:23,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:58:23,328 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:58:23,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (161)] Waiting until timeout for monitored process [2022-11-03 03:58:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:24,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:58:24,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 87 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:25,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 87 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:25,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:58:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917580810] [2022-11-03 03:58:25,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917580810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [695496296] [2022-11-03 03:58:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:58:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:58:25,610 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:58:25,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (162)] Waiting until timeout for monitored process [2022-11-03 03:58:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:27,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:58:27,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 11 proven. 65 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:58:28,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 11 proven. 65 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:58:29,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [695496296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612544256] [2022-11-03 03:58:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:29,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:29,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:29,777 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:29,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-11-03 03:58:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:30,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:58:30,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 87 proven. 77 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:58:31,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 87 proven. 77 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:58:32,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612544256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:32,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:58:32,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 12, 8, 8] total 40 [2022-11-03 03:58:32,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761961637] [2022-11-03 03:58:32,577 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:32,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:58:32,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:58:32,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:58:32,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1452, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:58:32,578 INFO L87 Difference]: Start difference. First operand 16691 states and 22464 transitions. Second operand has 40 states, 40 states have (on average 40.0) internal successors, (1600), 40 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:14,508 INFO L93 Difference]: Finished difference Result 219821 states and 297014 transitions. [2022-11-03 03:59:14,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 459 states. [2022-11-03 03:59:14,509 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 40.0) internal successors, (1600), 40 states have internal predecessors, (1600), 0 states have call successors, (0), 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 359 [2022-11-03 03:59:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:14,803 INFO L225 Difference]: With dead ends: 219821 [2022-11-03 03:59:14,803 INFO L226 Difference]: Without dead ends: 207013 [2022-11-03 03:59:14,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2650 GetRequests, 2118 SyntacticMatches, 38 SemanticMatches, 494 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113392 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=22982, Invalid=222538, Unknown=0, NotChecked=0, Total=245520 [2022-11-03 03:59:14,835 INFO L413 NwaCegarLoop]: 2523 mSDtfsCounter, 27718 mSDsluCounter, 58415 mSDsCounter, 0 mSdLazyCounter, 8329 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27718 SdHoareTripleChecker+Valid, 60938 SdHoareTripleChecker+Invalid, 19833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 8329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11090 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:14,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27718 Valid, 60938 Invalid, 19833 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [414 Valid, 8329 Invalid, 0 Unknown, 11090 Unchecked, 8.4s Time] [2022-11-03 03:59:14,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207013 states. [2022-11-03 03:59:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207013 to 17231. [2022-11-03 03:59:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17231 states, 17230 states have (on average 1.342542077771329) internal successors, (23132), 17230 states have internal predecessors, (23132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17231 states to 17231 states and 23132 transitions. [2022-11-03 03:59:15,893 INFO L78 Accepts]: Start accepts. Automaton has 17231 states and 23132 transitions. Word has length 359 [2022-11-03 03:59:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:15,894 INFO L495 AbstractCegarLoop]: Abstraction has 17231 states and 23132 transitions. [2022-11-03 03:59:15,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 40.0) internal successors, (1600), 40 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 17231 states and 23132 transitions. [2022-11-03 03:59:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:59:15,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:15,899 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:15,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:16,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (162)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:16,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (161)] Ended with exit code 0 [2022-11-03 03:59:16,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:16,500 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:16,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1225580199, now seen corresponding path program 1 times [2022-11-03 03:59:16,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:16,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566222230] [2022-11-03 03:59:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:16,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:16,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:16,503 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:16,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (164)] Waiting until timeout for monitored process [2022-11-03 03:59:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:17,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:59:17,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:18,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:18,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:18,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566222230] [2022-11-03 03:59:18,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566222230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:18,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [553042389] [2022-11-03 03:59:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:18,709 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:59:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:59:18,710 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:59:18,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (165)] Waiting until timeout for monitored process [2022-11-03 03:59:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:20,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:59:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:59:21,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 03:59:22,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [553042389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:22,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320884469] [2022-11-03 03:59:22,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:22,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:22,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:22,905 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:22,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-11-03 03:59:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:23,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:59:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 83 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:59:24,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 83 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:59:25,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320884469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:25,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:59:25,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 12, 8, 8] total 40 [2022-11-03 03:59:25,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437336667] [2022-11-03 03:59:25,784 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:25,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:59:25,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:25,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:59:25,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1452, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:59:25,786 INFO L87 Difference]: Start difference. First operand 17231 states and 23132 transitions. Second operand has 40 states, 40 states have (on average 40.55) internal successors, (1622), 40 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:56,193 INFO L93 Difference]: Finished difference Result 184276 states and 248616 transitions. [2022-11-03 03:59:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 345 states. [2022-11-03 03:59:56,193 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 40.55) internal successors, (1622), 40 states have internal predecessors, (1622), 0 states have call successors, (0), 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 359 [2022-11-03 03:59:56,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:56,286 INFO L225 Difference]: With dead ends: 184276 [2022-11-03 03:59:56,286 INFO L226 Difference]: Without dead ends: 171140 [2022-11-03 03:59:56,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2527 GetRequests, 2120 SyntacticMatches, 26 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62914 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=13572, Invalid=132734, Unknown=0, NotChecked=0, Total=146306 [2022-11-03 03:59:56,482 INFO L413 NwaCegarLoop]: 2219 mSDtfsCounter, 22114 mSDsluCounter, 47512 mSDsCounter, 0 mSdLazyCounter, 6139 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22114 SdHoareTripleChecker+Valid, 49731 SdHoareTripleChecker+Invalid, 17504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 6139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11131 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:56,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22114 Valid, 49731 Invalid, 17504 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [234 Valid, 6139 Invalid, 0 Unknown, 11131 Unchecked, 6.1s Time] [2022-11-03 03:59:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171140 states. [2022-11-03 03:59:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171140 to 17531. [2022-11-03 03:59:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17531 states, 17530 states have (on average 1.339874500855676) internal successors, (23488), 17530 states have internal predecessors, (23488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17531 states to 17531 states and 23488 transitions. [2022-11-03 03:59:57,295 INFO L78 Accepts]: Start accepts. Automaton has 17531 states and 23488 transitions. Word has length 359 [2022-11-03 03:59:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:57,295 INFO L495 AbstractCegarLoop]: Abstraction has 17531 states and 23488 transitions. [2022-11-03 03:59:57,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 40.55) internal successors, (1622), 40 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 17531 states and 23488 transitions. [2022-11-03 03:59:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 03:59:57,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:57,301 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:59:57,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (165)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:57,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (164)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:57,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-11-03 03:59:57,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:57,902 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:57,902 INFO L85 PathProgramCache]: Analyzing trace with hash 847800491, now seen corresponding path program 1 times [2022-11-03 03:59:57,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:57,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067641975] [2022-11-03 03:59:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:57,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:57,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:57,905 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:57,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (167)] Waiting until timeout for monitored process [2022-11-03 03:59:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:58,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:59:58,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 73 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:59,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 73 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:00,367 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:00,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067641975] [2022-11-03 04:00:00,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067641975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:00,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1607429713] [2022-11-03 04:00:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:00,368 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:00:00,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:00:00,369 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:00:00,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (168)] Waiting until timeout for monitored process [2022-11-03 04:00:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:01,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:00:01,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 04:00:03,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 04:00:04,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1607429713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:04,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084636937] [2022-11-03 04:00:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:04,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:04,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:04,589 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:04,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93dcd8d5-cf46-487e-a488-a617f0ddd98e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-11-03 04:00:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:05,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 2187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:00:05,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 73 proven. 91 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:00:06,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 73 proven. 91 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:00:07,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084636937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:07,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:00:07,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 12, 8, 8] total 40 [2022-11-03 04:00:07,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853073018] [2022-11-03 04:00:07,470 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:00:07,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 04:00:07,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:07,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 04:00:07,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1452, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 04:00:07,472 INFO L87 Difference]: Start difference. First operand 17531 states and 23488 transitions. Second operand has 40 states, 40 states have (on average 41.0) internal successors, (1640), 40 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)