./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_segments.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/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_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_segments.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/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_d9c97634-574b-444a-8f92-adcd9b324204/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 e734a6415ecaa3efaa9cfa8e6fa7e794c71eea5a8e2df3ec7e51a002eff99a9e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:44:39,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:44:39,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:44:39,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:44:39,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:44:39,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:44:39,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:44:39,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:44:39,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:44:39,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:44:39,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:44:39,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:44:39,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:44:39,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:44:39,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:44:39,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:44:39,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:44:39,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:44:39,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:44:39,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:44:39,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:44:39,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:44:40,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:44:40,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:44:40,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:44:40,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:44:40,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:44:40,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:44:40,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:44:40,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:44:40,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:44:40,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:44:40,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:44:40,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:44:40,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:44:40,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:44:40,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:44:40,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:44:40,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:44:40,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:44:40,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:44:40,021 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:44:40,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:44:40,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:44:40,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:44:40,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:44:40,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:44:40,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:44:40,052 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:44:40,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:44:40,052 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:44:40,053 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:44:40,053 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:44:40,053 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:44:40,054 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:44:40,054 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:44:40,054 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:44:40,054 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:44:40,055 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:44:40,055 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:44:40,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:44:40,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:44:40,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:44:40,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:44:40,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:44:40,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:44:40,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:44:40,058 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:44:40,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:44:40,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:44:40,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:44:40,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:44:40,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:44:40,059 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:44:40,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:44:40,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:44:40,060 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:44:40,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:44:40,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:44:40,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:44:40,061 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_d9c97634-574b-444a-8f92-adcd9b324204/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e734a6415ecaa3efaa9cfa8e6fa7e794c71eea5a8e2df3ec7e51a002eff99a9e [2022-11-03 02:44:40,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:44:40,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:44:40,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:44:40,488 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:44:40,489 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:44:40,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_segments.c [2022-11-03 02:44:40,574 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/data/04255366c/676d9a0533544c0ba525e4a2d7f9f670/FLAG44f2a8ec6 [2022-11-03 02:44:41,288 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:44:41,289 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_segments.c [2022-11-03 02:44:41,298 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/data/04255366c/676d9a0533544c0ba525e4a2d7f9f670/FLAG44f2a8ec6 [2022-11-03 02:44:41,605 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/data/04255366c/676d9a0533544c0ba525e4a2d7f9f670 [2022-11-03 02:44:41,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:44:41,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:44:41,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:44:41,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:44:41,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:44:41,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:44:41" (1/1) ... [2022-11-03 02:44:41,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@568998ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:41, skipping insertion in model container [2022-11-03 02:44:41,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:44:41" (1/1) ... [2022-11-03 02:44:41,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:44:41,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:44:41,910 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_d9c97634-574b-444a-8f92-adcd9b324204/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_segments.c[1107,1120] [2022-11-03 02:44:42,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:44:42,035 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:44:42,049 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_d9c97634-574b-444a-8f92-adcd9b324204/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_segments.c[1107,1120] [2022-11-03 02:44:42,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:44:42,106 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:44:42,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42 WrapperNode [2022-11-03 02:44:42,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:44:42,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:44:42,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:44:42,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:44:42,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42" (1/1) ... [2022-11-03 02:44:42,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42" (1/1) ... [2022-11-03 02:44:42,181 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 183 [2022-11-03 02:44:42,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:44:42,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:44:42,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:44:42,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:44:42,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42" (1/1) ... [2022-11-03 02:44:42,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42" (1/1) ... [2022-11-03 02:44:42,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42" (1/1) ... [2022-11-03 02:44:42,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42" (1/1) ... [2022-11-03 02:44:42,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42" (1/1) ... [2022-11-03 02:44:42,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42" (1/1) ... [2022-11-03 02:44:42,219 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42" (1/1) ... [2022-11-03 02:44:42,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42" (1/1) ... [2022-11-03 02:44:42,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:44:42,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:44:42,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:44:42,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:44:42,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42" (1/1) ... [2022-11-03 02:44:42,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:44:42,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:42,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:44:42,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:44:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:44:42,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:44:42,489 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:44:42,491 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:44:43,165 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:44:43,341 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:44:43,341 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:44:43,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:43 BoogieIcfgContainer [2022-11-03 02:44:43,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:44:43,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:44:43,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:44:43,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:44:43,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:44:41" (1/3) ... [2022-11-03 02:44:43,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f76e7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:44:43, skipping insertion in model container [2022-11-03 02:44:43,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:42" (2/3) ... [2022-11-03 02:44:43,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f76e7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:44:43, skipping insertion in model container [2022-11-03 02:44:43,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:43" (3/3) ... [2022-11-03 02:44:43,357 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_segments.c [2022-11-03 02:44:43,381 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:44:43,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:44:43,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:44:43,453 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;@4b3eb40c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:44:43,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:44:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:44:43,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:43,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:44:43,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 3257247, now seen corresponding path program 1 times [2022-11-03 02:44:43,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:43,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817076860] [2022-11-03 02:44:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:43,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:44:44,251 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:44:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:44:44,505 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:44:44,507 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:44:44,509 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:44:44,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:44:44,517 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:44:44,522 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:44:44,543 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:44:44,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:44:44 BoogieIcfgContainer [2022-11-03 02:44:44,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:44:44,552 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:44:44,552 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:44:44,553 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:44:44,553 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:43" (3/4) ... [2022-11-03 02:44:44,557 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:44:44,557 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:44:44,559 INFO L158 Benchmark]: Toolchain (without parser) took 2944.68ms. Allocated memory was 104.9MB in the beginning and 163.6MB in the end (delta: 58.7MB). Free memory was 76.3MB in the beginning and 124.0MB in the end (delta: -47.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:44:44,560 INFO L158 Benchmark]: CDTParser took 0.71ms. Allocated memory is still 104.9MB. Free memory is still 58.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:44:44,561 INFO L158 Benchmark]: CACSL2BoogieTranslator took 488.49ms. Allocated memory was 104.9MB in the beginning and 163.6MB in the end (delta: 58.7MB). Free memory was 76.1MB in the beginning and 135.6MB in the end (delta: -59.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:44:44,562 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.56ms. Allocated memory is still 163.6MB. Free memory was 135.6MB in the beginning and 132.1MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:44:44,562 INFO L158 Benchmark]: Boogie Preprocessor took 43.29ms. Allocated memory is still 163.6MB. Free memory was 132.1MB in the beginning and 129.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:44:44,563 INFO L158 Benchmark]: RCFGBuilder took 1118.47ms. Allocated memory is still 163.6MB. Free memory was 129.9MB in the beginning and 123.5MB in the end (delta: 6.4MB). Peak memory consumption was 45.3MB. Max. memory is 16.1GB. [2022-11-03 02:44:44,564 INFO L158 Benchmark]: TraceAbstraction took 1203.05ms. Allocated memory is still 163.6MB. Free memory was 122.9MB in the beginning and 125.1MB in the end (delta: -2.2MB). Peak memory consumption was 46.4MB. Max. memory is 16.1GB. [2022-11-03 02:44:44,565 INFO L158 Benchmark]: Witness Printer took 5.28ms. Allocated memory is still 163.6MB. Free memory was 125.1MB in the beginning and 124.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:44:44,569 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71ms. Allocated memory is still 104.9MB. Free memory is still 58.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 488.49ms. Allocated memory was 104.9MB in the beginning and 163.6MB in the end (delta: 58.7MB). Free memory was 76.1MB in the beginning and 135.6MB in the end (delta: -59.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.56ms. Allocated memory is still 163.6MB. Free memory was 135.6MB in the beginning and 132.1MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.29ms. Allocated memory is still 163.6MB. Free memory was 132.1MB in the beginning and 129.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1118.47ms. Allocated memory is still 163.6MB. Free memory was 129.9MB in the beginning and 123.5MB in the end (delta: 6.4MB). Peak memory consumption was 45.3MB. Max. memory is 16.1GB. * TraceAbstraction took 1203.05ms. Allocated memory is still 163.6MB. Free memory was 122.9MB in the beginning and 125.1MB in the end (delta: -2.2MB). Peak memory consumption was 46.4MB. Max. memory is 16.1GB. * Witness Printer took 5.28ms. Allocated memory is still 163.6MB. Free memory was 125.1MB in the beginning and 124.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 109, overapproximation of bitwiseOr at line 80, overapproximation of bitwiseAnd at line 63. 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_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 8); [L29] const SORT_4 msb_SORT_4 = (SORT_4)1 << (8 - 1); [L31] const SORT_8 mask_SORT_8 = (SORT_8)-1 >> (sizeof(SORT_8) * 8 - 32); [L32] const SORT_8 msb_SORT_8 = (SORT_8)1 << (32 - 1); [L34] const SORT_52 mask_SORT_52 = (SORT_52)-1 >> (sizeof(SORT_52) * 8 - 2); [L35] const SORT_52 msb_SORT_52 = (SORT_52)1 << (2 - 1); [L37] const SORT_54 mask_SORT_54 = (SORT_54)-1 >> (sizeof(SORT_54) * 8 - 3); [L38] const SORT_54 msb_SORT_54 = (SORT_54)1 << (3 - 1); [L40] const SORT_4 var_5 = 0; [L41] const SORT_8 var_10 = 0; [L42] const SORT_8 var_13 = 1; [L43] const SORT_8 var_17 = 2; [L44] const SORT_8 var_21 = 3; [L45] const SORT_8 var_25 = 4; [L46] const SORT_1 var_30 = 1; [L47] const SORT_4 var_41 = 1; [L48] const SORT_4 var_44 = 4; [L49] const SORT_4 var_45 = 3; [L50] const SORT_4 var_50 = 2; [L52] SORT_1 input_2; [L53] SORT_1 input_3; [L55] SORT_4 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_4; [L57] SORT_4 init_7_arg_1 = var_5; [L58] state_6 = init_7_arg_1 VAL [init_7_arg_1=0, mask_SORT_1=1, mask_SORT_4=255, mask_SORT_52=3, mask_SORT_54=7, mask_SORT_8=4294967295, msb_SORT_1=1, msb_SORT_4=128, msb_SORT_52=2, msb_SORT_54=4, msb_SORT_8=2147483648, state_6=0, var_10=0, var_13=1, var_17=2, var_21=3, var_25=4, var_30=1, var_41=1, var_44=4, var_45=3, var_5=0, var_50=2] [L61] input_2 = __VERIFIER_nondet_uchar() [L62] input_3 = __VERIFIER_nondet_uchar() [L63] input_3 = input_3 & mask_SORT_1 [L66] SORT_4 var_9_arg_0 = state_6; [L67] var_9_arg_0 = var_9_arg_0 & mask_SORT_4 [L68] SORT_8 var_9 = var_9_arg_0; [L69] SORT_8 var_11_arg_0 = var_9; [L70] SORT_8 var_11_arg_1 = var_10; [L71] SORT_1 var_11 = var_11_arg_0 == var_11_arg_1; [L72] SORT_4 var_12_arg_0 = state_6; [L73] var_12_arg_0 = var_12_arg_0 & mask_SORT_4 [L74] SORT_8 var_12 = var_12_arg_0; [L75] SORT_8 var_14_arg_0 = var_12; [L76] SORT_8 var_14_arg_1 = var_13; [L77] SORT_1 var_14 = var_14_arg_0 == var_14_arg_1; [L78] SORT_1 var_15_arg_0 = var_11; [L79] SORT_1 var_15_arg_1 = var_14; [L80] SORT_1 var_15 = var_15_arg_0 | var_15_arg_1; [L81] SORT_4 var_16_arg_0 = state_6; [L82] var_16_arg_0 = var_16_arg_0 & mask_SORT_4 [L83] SORT_8 var_16 = var_16_arg_0; [L84] SORT_8 var_18_arg_0 = var_16; [L85] SORT_8 var_18_arg_1 = var_17; [L86] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L87] SORT_1 var_19_arg_0 = var_15; [L88] SORT_1 var_19_arg_1 = var_18; [L89] SORT_1 var_19 = var_19_arg_0 | var_19_arg_1; [L90] SORT_4 var_20_arg_0 = state_6; [L91] var_20_arg_0 = var_20_arg_0 & mask_SORT_4 [L92] SORT_8 var_20 = var_20_arg_0; [L93] SORT_8 var_22_arg_0 = var_20; [L94] SORT_8 var_22_arg_1 = var_21; [L95] SORT_1 var_22 = var_22_arg_0 == var_22_arg_1; [L96] SORT_1 var_23_arg_0 = var_19; [L97] SORT_1 var_23_arg_1 = var_22; [L98] SORT_1 var_23 = var_23_arg_0 | var_23_arg_1; [L99] SORT_4 var_24_arg_0 = state_6; [L100] var_24_arg_0 = var_24_arg_0 & mask_SORT_4 [L101] SORT_8 var_24 = var_24_arg_0; [L102] SORT_8 var_26_arg_0 = var_24; [L103] SORT_8 var_26_arg_1 = var_25; [L104] SORT_1 var_26 = var_26_arg_0 == var_26_arg_1; [L105] SORT_1 var_27_arg_0 = var_23; [L106] SORT_1 var_27_arg_1 = var_26; [L107] SORT_1 var_27 = var_27_arg_0 | var_27_arg_1; [L108] SORT_1 var_31_arg_0 = var_27; [L109] SORT_1 var_31 = ~var_31_arg_0; [L110] SORT_1 var_32_arg_0 = var_30; [L111] SORT_1 var_32_arg_1 = var_31; [L112] SORT_1 var_32 = var_32_arg_0 & var_32_arg_1; [L113] var_32 = var_32 & mask_SORT_1 [L114] SORT_1 bad_33_arg_0 = var_32; [L115] CALL __VERIFIER_assert(!(bad_33_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, 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, 0.6s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:44:44,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/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_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_segments.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/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_d9c97634-574b-444a-8f92-adcd9b324204/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 e734a6415ecaa3efaa9cfa8e6fa7e794c71eea5a8e2df3ec7e51a002eff99a9e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:44:47,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:44:47,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:44:47,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:44:47,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:44:47,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:44:47,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:44:47,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:44:47,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:44:47,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:44:47,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:44:47,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:44:47,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:44:47,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:44:47,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:44:47,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:44:47,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:44:47,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:44:47,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:44:47,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:44:47,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:44:47,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:44:47,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:44:47,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:44:47,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:44:47,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:44:47,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:44:47,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:44:47,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:44:47,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:44:47,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:44:47,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:44:47,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:44:47,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:44:47,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:44:47,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:44:47,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:44:47,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:44:47,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:44:47,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:44:47,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:44:47,604 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:44:47,652 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:44:47,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:44:47,654 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:44:47,654 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:44:47,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:44:47,656 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:44:47,656 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:44:47,657 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:44:47,657 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:44:47,657 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:44:47,658 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:44:47,659 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:44:47,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:44:47,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:44:47,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:44:47,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:44:47,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:44:47,662 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:44:47,662 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:44:47,663 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:44:47,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:44:47,663 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:44:47,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:44:47,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:44:47,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:44:47,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:44:47,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:44:47,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:44:47,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:44:47,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:44:47,666 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:44:47,666 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:47,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:44:47,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:44:47,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:44:47,668 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_d9c97634-574b-444a-8f92-adcd9b324204/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e734a6415ecaa3efaa9cfa8e6fa7e794c71eea5a8e2df3ec7e51a002eff99a9e [2022-11-03 02:44:48,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:44:48,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:44:48,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:44:48,144 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:44:48,147 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:44:48,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_segments.c [2022-11-03 02:44:48,234 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/data/ef9a76d5e/fbb62a583039421c81cce5bbddad2728/FLAGd31bf0483 [2022-11-03 02:44:48,896 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:44:48,897 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_segments.c [2022-11-03 02:44:48,908 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/data/ef9a76d5e/fbb62a583039421c81cce5bbddad2728/FLAGd31bf0483 [2022-11-03 02:44:49,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/data/ef9a76d5e/fbb62a583039421c81cce5bbddad2728 [2022-11-03 02:44:49,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:44:49,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:44:49,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:44:49,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:44:49,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:44:49,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@218ec30d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49, skipping insertion in model container [2022-11-03 02:44:49,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:44:49,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:44:49,418 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_d9c97634-574b-444a-8f92-adcd9b324204/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_segments.c[1107,1120] [2022-11-03 02:44:49,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:44:49,544 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:44:49,563 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_d9c97634-574b-444a-8f92-adcd9b324204/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_segments.c[1107,1120] [2022-11-03 02:44:49,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:44:49,687 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:44:49,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49 WrapperNode [2022-11-03 02:44:49,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:44:49,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:44:49,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:44:49,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:44:49,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,767 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 183 [2022-11-03 02:44:49,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:44:49,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:44:49,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:44:49,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:44:49,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,836 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:44:49,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:44:49,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:44:49,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:44:49,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49" (1/1) ... [2022-11-03 02:44:49,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:44:49,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:49,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:44:49,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:44:49,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:44:49,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:44:50,122 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:44:50,125 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:44:50,492 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:44:50,501 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:44:50,502 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:44:50,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:50 BoogieIcfgContainer [2022-11-03 02:44:50,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:44:50,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:44:50,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:44:50,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:44:50,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:44:49" (1/3) ... [2022-11-03 02:44:50,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d64a862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:44:50, skipping insertion in model container [2022-11-03 02:44:50,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:49" (2/3) ... [2022-11-03 02:44:50,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d64a862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:44:50, skipping insertion in model container [2022-11-03 02:44:50,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:50" (3/3) ... [2022-11-03 02:44:50,517 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_segments.c [2022-11-03 02:44:50,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:44:50,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:44:50,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:44:50,613 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;@41fdcb4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:44:50,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:44:50,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:44:50,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:50,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:44:50,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:50,636 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:44:50,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:50,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638902496] [2022-11-03 02:44:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:50,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:50,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:50,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:50,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:44:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:50,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:44:50,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:51,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:51,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:51,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638902496] [2022-11-03 02:44:51,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638902496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:51,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:51,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:44:51,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912384585] [2022-11-03 02:44:51,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:51,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:51,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:51,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:51,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:51,344 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:51,476 INFO L93 Difference]: Finished difference Result 62 states and 93 transitions. [2022-11-03 02:44:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:44:51,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:44:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:51,490 INFO L225 Difference]: With dead ends: 62 [2022-11-03 02:44:51,490 INFO L226 Difference]: Without dead ends: 39 [2022-11-03 02:44:51,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:51,502 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:51,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 69 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-03 02:44:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2022-11-03 02:44:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-11-03 02:44:51,541 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 5 [2022-11-03 02:44:51,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:51,541 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-11-03 02:44:51,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:51,542 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-11-03 02:44:51,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:44:51,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:51,555 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] [2022-11-03 02:44:51,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:51,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:51,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:51,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:51,771 INFO L85 PathProgramCache]: Analyzing trace with hash -473869687, now seen corresponding path program 1 times [2022-11-03 02:44:51,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:51,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740373177] [2022-11-03 02:44:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:51,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:51,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:51,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:51,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:44:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:51,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:51,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:52,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:52,005 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:52,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740373177] [2022-11-03 02:44:52,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740373177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:52,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:52,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:44:52,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132634707] [2022-11-03 02:44:52,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:52,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:52,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:52,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:52,010 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:52,105 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2022-11-03 02:44:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:44:52,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:44:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:52,108 INFO L225 Difference]: With dead ends: 75 [2022-11-03 02:44:52,108 INFO L226 Difference]: Without dead ends: 56 [2022-11-03 02:44:52,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:52,115 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 63 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:52,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 84 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-03 02:44:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2022-11-03 02:44:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-03 02:44:52,140 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 22 [2022-11-03 02:44:52,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:52,141 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-03 02:44:52,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:52,147 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-03 02:44:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:44:52,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:52,149 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] [2022-11-03 02:44:52,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:52,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:52,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:52,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2062217589, now seen corresponding path program 1 times [2022-11-03 02:44:52,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:52,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407347646] [2022-11-03 02:44:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:52,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:52,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:52,361 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:52,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:44:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:52,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:52,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:52,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:52,695 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:52,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407347646] [2022-11-03 02:44:52,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407347646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:52,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:52,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:44:52,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844771180] [2022-11-03 02:44:52,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:52,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:44:52,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:52,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:44:52,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:52,698 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:52,843 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2022-11-03 02:44:52,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:44:52,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:44:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:52,847 INFO L225 Difference]: With dead ends: 84 [2022-11-03 02:44:52,849 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 02:44:52,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:44:52,852 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 73 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:52,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 118 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 02:44:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 35. [2022-11-03 02:44:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-11-03 02:44:52,870 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 22 [2022-11-03 02:44:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:52,871 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-11-03 02:44:52,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-11-03 02:44:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:44:52,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:52,873 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:52,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:53,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:53,090 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash -287210227, now seen corresponding path program 1 times [2022-11-03 02:44:53,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:53,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53772455] [2022-11-03 02:44:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:53,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:53,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:53,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:53,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:44:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:53,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:44:53,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:53,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:53,499 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:53,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53772455] [2022-11-03 02:44:53,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53772455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:53,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:53,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:44:53,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814044576] [2022-11-03 02:44:53,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:53,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:44:53,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:53,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:44:53,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:53,508 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:53,702 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2022-11-03 02:44:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:44:53,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:44:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:53,710 INFO L225 Difference]: With dead ends: 80 [2022-11-03 02:44:53,710 INFO L226 Difference]: Without dead ends: 61 [2022-11-03 02:44:53,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:44:53,712 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 59 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:53,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 106 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:53,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-03 02:44:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2022-11-03 02:44:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-11-03 02:44:53,725 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 22 [2022-11-03 02:44:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:53,725 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-11-03 02:44:53,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-11-03 02:44:53,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:44:53,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:53,728 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] [2022-11-03 02:44:53,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:53,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:53,944 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash -285363185, now seen corresponding path program 1 times [2022-11-03 02:44:53,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:53,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650551171] [2022-11-03 02:44:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:53,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:53,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:53,948 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:53,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:44:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:54,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:44:54,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:54,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:56,637 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:56,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650551171] [2022-11-03 02:44:56,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650551171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:56,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143150638] [2022-11-03 02:44:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:56,648 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:56,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:56,651 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:56,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 02:44:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:56,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:44:56,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:57,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:57,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1143150638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:57,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695221451] [2022-11-03 02:44:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:57,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:57,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:57,781 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:57,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:44:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:57,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 02:44:57,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:58,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:59,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695221451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:59,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:44:59,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 14, 14] total 26 [2022-11-03 02:44:59,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546023529] [2022-11-03 02:44:59,029 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:59,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:44:59,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:44:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:44:59,032 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:00,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:00,284 INFO L93 Difference]: Finished difference Result 92 states and 122 transitions. [2022-11-03 02:45:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:45:00,294 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 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 22 [2022-11-03 02:45:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:00,295 INFO L225 Difference]: With dead ends: 92 [2022-11-03 02:45:00,295 INFO L226 Difference]: Without dead ends: 90 [2022-11-03 02:45:00,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:45:00,297 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 193 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:00,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 419 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 157 Unchecked, 0.3s Time] [2022-11-03 02:45:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-03 02:45:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2022-11-03 02:45:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 62 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2022-11-03 02:45:00,314 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 22 [2022-11-03 02:45:00,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:00,315 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2022-11-03 02:45:00,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2022-11-03 02:45:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:45:00,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:00,318 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] [2022-11-03 02:45:00,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:00,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:00,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:00,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:00,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash 394695185, now seen corresponding path program 1 times [2022-11-03 02:45:00,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:00,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582757309] [2022-11-03 02:45:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:00,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:00,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:00,943 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:00,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:45:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:01,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:45:01,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:01,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:01,195 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:01,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582757309] [2022-11-03 02:45:01,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582757309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:01,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:01,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:45:01,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204739074] [2022-11-03 02:45:01,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:01,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:45:01,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:01,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:45:01,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:45:01,198 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:01,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:01,323 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2022-11-03 02:45:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:45:01,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:45:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:01,325 INFO L225 Difference]: With dead ends: 112 [2022-11-03 02:45:01,325 INFO L226 Difference]: Without dead ends: 89 [2022-11-03 02:45:01,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:45:01,326 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:01,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 99 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:01,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-03 02:45:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2022-11-03 02:45:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2022-11-03 02:45:01,336 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 22 [2022-11-03 02:45:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:01,337 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2022-11-03 02:45:01,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2022-11-03 02:45:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:45:01,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:01,339 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] [2022-11-03 02:45:01,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:01,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:45:01,541 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash 415701393, now seen corresponding path program 1 times [2022-11-03 02:45:01,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:01,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760867759] [2022-11-03 02:45:01,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:01,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:01,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:01,543 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:01,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:45:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:45:01,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:01,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:01,814 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:01,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760867759] [2022-11-03 02:45:01,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760867759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:01,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:01,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:45:01,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162902597] [2022-11-03 02:45:01,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:01,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:45:01,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:45:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:01,819 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:01,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:01,856 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2022-11-03 02:45:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:45:01,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:45:01,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:01,858 INFO L225 Difference]: With dead ends: 90 [2022-11-03 02:45:01,858 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 02:45:01,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:45:01,860 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:01,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 127 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-11-03 02:45:01,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 02:45:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-03 02:45:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2022-11-03 02:45:01,869 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 22 [2022-11-03 02:45:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:01,870 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2022-11-03 02:45:01,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2022-11-03 02:45:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:45:01,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:01,871 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] [2022-11-03 02:45:01,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:02,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:45:02,077 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:02,078 INFO L85 PathProgramCache]: Analyzing trace with hash -171104621, now seen corresponding path program 1 times [2022-11-03 02:45:02,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:02,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272153876] [2022-11-03 02:45:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:02,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:02,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:02,080 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:02,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:45:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:02,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:45:02,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:02,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:04,236 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:04,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272153876] [2022-11-03 02:45:04,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272153876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:04,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [809094957] [2022-11-03 02:45:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:04,237 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:04,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:04,238 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:04,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 02:45:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:04,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:45:04,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:04,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:05,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [809094957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:05,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795857853] [2022-11-03 02:45:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:05,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:05,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:05,105 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:05,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:45:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:05,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:45:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:05,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:06,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795857853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:06,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:45:06,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 14, 14] total 26 [2022-11-03 02:45:06,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752505992] [2022-11-03 02:45:06,158 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:06,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:45:06,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:45:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:45:06,163 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:08,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:08,304 INFO L93 Difference]: Finished difference Result 138 states and 181 transitions. [2022-11-03 02:45:08,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:45:08,305 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 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 22 [2022-11-03 02:45:08,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:08,306 INFO L225 Difference]: With dead ends: 138 [2022-11-03 02:45:08,306 INFO L226 Difference]: Without dead ends: 136 [2022-11-03 02:45:08,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=612, Invalid=1938, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:45:08,309 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 217 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:08,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 637 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 251 Invalid, 0 Unknown, 299 Unchecked, 0.4s Time] [2022-11-03 02:45:08,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-03 02:45:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 74. [2022-11-03 02:45:08,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 73 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2022-11-03 02:45:08,320 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 22 [2022-11-03 02:45:08,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:08,321 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2022-11-03 02:45:08,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2022-11-03 02:45:08,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:45:08,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:08,323 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:08,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:08,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-03 02:45:08,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:08,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:08,938 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:08,939 INFO L85 PathProgramCache]: Analyzing trace with hash -536525885, now seen corresponding path program 1 times [2022-11-03 02:45:08,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:08,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911452514] [2022-11-03 02:45:08,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:08,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:08,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:08,941 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:08,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:45:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:09,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:45:09,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:09,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:09,989 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:09,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911452514] [2022-11-03 02:45:09,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911452514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:09,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1338091204] [2022-11-03 02:45:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:09,990 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:09,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:09,993 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:09,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:45:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:10,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:45:10,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:10,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:10,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1338091204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:10,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333937885] [2022-11-03 02:45:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:10,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:10,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:10,914 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:10,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:45:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:11,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:45:11,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:45:11,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:45:11,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333937885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:11,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:45:11,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16, 16, 7, 7] total 37 [2022-11-03 02:45:11,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018491889] [2022-11-03 02:45:11,803 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:11,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 02:45:11,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:11,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 02:45:11,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:45:11,808 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:13,756 INFO L93 Difference]: Finished difference Result 198 states and 260 transitions. [2022-11-03 02:45:13,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:45:13,758 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 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 39 [2022-11-03 02:45:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:13,761 INFO L225 Difference]: With dead ends: 198 [2022-11-03 02:45:13,761 INFO L226 Difference]: Without dead ends: 132 [2022-11-03 02:45:13,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=506, Invalid=3400, Unknown=0, NotChecked=0, Total=3906 [2022-11-03 02:45:13,764 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 321 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:13,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1025 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 265 Invalid, 0 Unknown, 320 Unchecked, 0.4s Time] [2022-11-03 02:45:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-03 02:45:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 87. [2022-11-03 02:45:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 86 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-11-03 02:45:13,779 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 39 [2022-11-03 02:45:13,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:13,780 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-11-03 02:45:13,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-11-03 02:45:13,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:45:13,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:13,782 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:13,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:14,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:14,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:14,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:14,398 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2124873787, now seen corresponding path program 1 times [2022-11-03 02:45:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:14,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47278531] [2022-11-03 02:45:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:14,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:14,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:14,401 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:14,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:45:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:14,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:45:14,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:14,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:15,406 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:15,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47278531] [2022-11-03 02:45:15,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47278531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:15,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1273606572] [2022-11-03 02:45:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:15,407 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:15,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:15,408 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:15,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:45:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:15,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:45:15,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:16,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:16,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1273606572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:16,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744017417] [2022-11-03 02:45:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:16,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:16,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:16,386 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:16,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:45:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:16,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:45:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:45:17,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:45:17,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744017417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:17,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:45:17,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17, 17, 8, 8] total 40 [2022-11-03 02:45:17,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978314593] [2022-11-03 02:45:17,487 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:17,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:45:17,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:17,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:45:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1441, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:45:17,492 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 40 states, 40 states have (on average 3.25) internal successors, (130), 40 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:38,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:38,419 INFO L93 Difference]: Finished difference Result 679 states and 881 transitions. [2022-11-03 02:45:38,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-11-03 02:45:38,420 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 40 states have internal predecessors, (130), 0 states have call successors, (0), 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 39 [2022-11-03 02:45:38,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:38,422 INFO L225 Difference]: With dead ends: 679 [2022-11-03 02:45:38,422 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 02:45:38,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12403 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=5749, Invalid=32471, Unknown=0, NotChecked=0, Total=38220 [2022-11-03 02:45:38,431 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 3185 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3185 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:38,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3185 Valid, 971 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:45:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 02:45:38,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 76. [2022-11-03 02:45:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.24) internal successors, (93), 75 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-11-03 02:45:38,450 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 39 [2022-11-03 02:45:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:38,451 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-11-03 02:45:38,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 40 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-11-03 02:45:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:45:38,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:38,453 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:38,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-03 02:45:38,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:38,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-03 02:45:39,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:39,069 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:39,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:39,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1444815417, now seen corresponding path program 1 times [2022-11-03 02:45:39,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:39,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226027279] [2022-11-03 02:45:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:39,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:39,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:39,072 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:39,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:45:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:39,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 02:45:39,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:40,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:41,973 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:41,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226027279] [2022-11-03 02:45:41,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226027279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:41,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1017270581] [2022-11-03 02:45:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:41,974 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:41,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:41,976 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:42,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:45:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:42,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:45:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:45:43,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:45:46,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1017270581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:46,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603815259] [2022-11-03 02:45:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:46,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:46,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:46,266 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:46,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:45:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:46,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:45:46,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:45:46,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:45:48,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603815259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:48,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:45:48,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12, 12, 13, 13] total 46 [2022-11-03 02:45:48,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051414048] [2022-11-03 02:45:48,126 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:48,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 02:45:48,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 02:45:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1956, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:45:48,129 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 46 states, 46 states have (on average 2.9130434782608696) internal successors, (134), 46 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:22,689 INFO L93 Difference]: Finished difference Result 665 states and 854 transitions. [2022-11-03 02:46:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-11-03 02:46:22,690 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9130434782608696) internal successors, (134), 46 states have internal predecessors, (134), 0 states have call successors, (0), 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 39 [2022-11-03 02:46:22,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:22,693 INFO L225 Difference]: With dead ends: 665 [2022-11-03 02:46:22,693 INFO L226 Difference]: Without dead ends: 620 [2022-11-03 02:46:22,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 192 SyntacticMatches, 70 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21786 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=7405, Invalid=41215, Unknown=0, NotChecked=0, Total=48620 [2022-11-03 02:46:22,701 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1799 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1799 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1383 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:22,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1799 Valid, 693 Invalid, 2392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 572 Invalid, 0 Unknown, 1383 Unchecked, 1.3s Time] [2022-11-03 02:46:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-11-03 02:46:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 127. [2022-11-03 02:46:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2777777777777777) internal successors, (161), 126 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 161 transitions. [2022-11-03 02:46:22,726 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 161 transitions. Word has length 39 [2022-11-03 02:46:22,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:22,727 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 161 transitions. [2022-11-03 02:46:22,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9130434782608696) internal successors, (134), 46 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:22,728 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 161 transitions. [2022-11-03 02:46:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:46:22,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:22,729 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:22,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:22,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:23,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:23,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:46:23,333 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:23,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:23,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1442968375, now seen corresponding path program 1 times [2022-11-03 02:46:23,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:46:23,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262151809] [2022-11-03 02:46:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:23,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:46:23,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:46:23,336 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:46:23,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:46:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:23,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:46:23,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:46:23,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:46:25,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:46:25,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262151809] [2022-11-03 02:46:25,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262151809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:25,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [368544515] [2022-11-03 02:46:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:25,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:46:25,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:46:25,427 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:46:25,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 02:46:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:25,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:46:25,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:46:25,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:46:26,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [368544515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:26,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098591258] [2022-11-03 02:46:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:26,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:26,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:26,613 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:26,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 02:46:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:26,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:46:26,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:46:27,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:46:27,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098591258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:27,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:46:27,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 13, 13] total 24 [2022-11-03 02:46:27,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790170553] [2022-11-03 02:46:27,914 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:27,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:46:27,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:46:27,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:46:27,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:46:27,915 INFO L87 Difference]: Start difference. First operand 127 states and 161 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:29,285 INFO L93 Difference]: Finished difference Result 398 states and 505 transitions. [2022-11-03 02:46:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:46:29,286 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 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 39 [2022-11-03 02:46:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:29,288 INFO L225 Difference]: With dead ends: 398 [2022-11-03 02:46:29,288 INFO L226 Difference]: Without dead ends: 396 [2022-11-03 02:46:29,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 205 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:46:29,289 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 214 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:29,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 483 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 175 Invalid, 0 Unknown, 165 Unchecked, 0.3s Time] [2022-11-03 02:46:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-11-03 02:46:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 159. [2022-11-03 02:46:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.3101265822784811) internal successors, (207), 158 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 207 transitions. [2022-11-03 02:46:29,313 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 207 transitions. Word has length 39 [2022-11-03 02:46:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:29,314 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 207 transitions. [2022-11-03 02:46:29,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 207 transitions. [2022-11-03 02:46:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:46:29,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:29,316 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:29,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:29,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:29,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:29,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:46:29,920 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:29,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:29,921 INFO L85 PathProgramCache]: Analyzing trace with hash 332038987, now seen corresponding path program 1 times [2022-11-03 02:46:29,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:46:29,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996430104] [2022-11-03 02:46:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:29,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:46:29,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:46:29,923 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:46:29,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:46:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:30,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:46:30,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:30,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:30,854 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:46:30,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996430104] [2022-11-03 02:46:30,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996430104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:30,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1534802680] [2022-11-03 02:46:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:30,854 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:46:30,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:46:30,856 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:46:30,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:46:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:31,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:46:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:31,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:31,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1534802680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:31,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257376305] [2022-11-03 02:46:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:31,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:31,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:31,393 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:31,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:46:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:31,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:46:31,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:31,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:32,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257376305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:32,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:46:32,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 15, 15] total 36 [2022-11-03 02:46:32,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571115817] [2022-11-03 02:46:32,371 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:32,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:46:32,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:46:32,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:46:32,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:46:32,373 INFO L87 Difference]: Start difference. First operand 159 states and 207 transitions. Second operand has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:35,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:35,872 INFO L93 Difference]: Finished difference Result 996 states and 1297 transitions. [2022-11-03 02:46:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-03 02:46:35,873 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 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 39 [2022-11-03 02:46:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:35,877 INFO L225 Difference]: With dead ends: 996 [2022-11-03 02:46:35,877 INFO L226 Difference]: Without dead ends: 864 [2022-11-03 02:46:35,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1441, Invalid=7115, Unknown=0, NotChecked=0, Total=8556 [2022-11-03 02:46:35,880 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 998 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:35,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 690 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:46:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-11-03 02:46:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 175. [2022-11-03 02:46:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.3045977011494252) internal successors, (227), 174 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 227 transitions. [2022-11-03 02:46:35,908 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 227 transitions. Word has length 39 [2022-11-03 02:46:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:35,909 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 227 transitions. [2022-11-03 02:46:35,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 227 transitions. [2022-11-03 02:46:35,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:46:35,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:35,911 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:35,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:36,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:36,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-03 02:46:36,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:36,515 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:36,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:36,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2029774389, now seen corresponding path program 1 times [2022-11-03 02:46:36,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:46:36,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905656435] [2022-11-03 02:46:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:36,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:46:36,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:46:36,518 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:46:36,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:46:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:36,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:46:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:46:36,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:46:36,837 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:46:36,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905656435] [2022-11-03 02:46:36,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905656435] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:36,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:36,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-03 02:46:36,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000065023] [2022-11-03 02:46:36,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:36,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:46:36,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:46:36,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:46:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:46:36,839 INFO L87 Difference]: Start difference. First operand 175 states and 227 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:36,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:36,938 INFO L93 Difference]: Finished difference Result 421 states and 542 transitions. [2022-11-03 02:46:36,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:46:36,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 39 [2022-11-03 02:46:36,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:36,940 INFO L225 Difference]: With dead ends: 421 [2022-11-03 02:46:36,940 INFO L226 Difference]: Without dead ends: 262 [2022-11-03 02:46:36,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:46:36,942 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 60 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:36,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 107 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:46:36,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-03 02:46:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 169. [2022-11-03 02:46:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.255952380952381) internal successors, (211), 168 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 211 transitions. [2022-11-03 02:46:36,965 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 211 transitions. Word has length 39 [2022-11-03 02:46:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:36,965 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 211 transitions. [2022-11-03 02:46:36,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 211 transitions. [2022-11-03 02:46:36,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:46:36,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:36,967 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:36,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:37,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:46:37,181 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:37,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:37,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1328709811, now seen corresponding path program 1 times [2022-11-03 02:46:37,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:46:37,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065363540] [2022-11-03 02:46:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:37,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:46:37,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:46:37,184 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:46:37,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:46:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:37,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:46:37,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:46:37,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:46:39,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:46:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065363540] [2022-11-03 02:46:39,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065363540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1769803565] [2022-11-03 02:46:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:39,023 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:46:39,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:46:39,024 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:46:39,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 02:46:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:39,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:46:39,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:46:39,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:46:40,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1769803565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:40,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655379688] [2022-11-03 02:46:40,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:40,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:40,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:40,136 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:40,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 02:46:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:40,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:46:40,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:46:40,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:46:41,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655379688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:41,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:46:41,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 13, 13] total 24 [2022-11-03 02:46:41,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181777314] [2022-11-03 02:46:41,342 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:41,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:46:41,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:46:41,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:46:41,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:46:41,344 INFO L87 Difference]: Start difference. First operand 169 states and 211 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:43,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:43,445 INFO L93 Difference]: Finished difference Result 510 states and 645 transitions. [2022-11-03 02:46:43,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 02:46:43,447 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 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 39 [2022-11-03 02:46:43,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:43,450 INFO L225 Difference]: With dead ends: 510 [2022-11-03 02:46:43,450 INFO L226 Difference]: Without dead ends: 508 [2022-11-03 02:46:43,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:46:43,451 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 208 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:43,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 766 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 269 Invalid, 0 Unknown, 233 Unchecked, 0.4s Time] [2022-11-03 02:46:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-11-03 02:46:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 149. [2022-11-03 02:46:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.25) internal successors, (185), 148 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 185 transitions. [2022-11-03 02:46:43,477 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 185 transitions. Word has length 39 [2022-11-03 02:46:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:43,478 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 185 transitions. [2022-11-03 02:46:43,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:43,478 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 185 transitions. [2022-11-03 02:46:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:46:43,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:43,479 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:43,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:43,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:43,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:44,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:44,089 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:44,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:44,090 INFO L85 PathProgramCache]: Analyzing trace with hash -343308351, now seen corresponding path program 1 times [2022-11-03 02:46:44,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:46:44,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125606573] [2022-11-03 02:46:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:44,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:46:44,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:46:44,092 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:46:44,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:46:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:44,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:46:44,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:44,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:45,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:46:45,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125606573] [2022-11-03 02:46:45,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125606573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [359233624] [2022-11-03 02:46:45,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:45,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:46:45,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:46:45,048 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:46:45,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 02:46:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:45,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:46:45,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:45,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:46,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [359233624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:46,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758755641] [2022-11-03 02:46:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:46,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:46,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:46,605 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:46,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 02:46:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:46,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:46:46,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:46:47,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:46:47,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758755641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:47,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:46:47,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14, 14, 7, 7] total 52 [2022-11-03 02:46:47,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441638804] [2022-11-03 02:46:47,573 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:47,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-03 02:46:47,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:46:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-03 02:46:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:46:47,576 INFO L87 Difference]: Start difference. First operand 149 states and 185 transitions. Second operand has 52 states, 52 states have (on average 3.326923076923077) internal successors, (173), 52 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:59,793 INFO L93 Difference]: Finished difference Result 971 states and 1227 transitions. [2022-11-03 02:46:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-03 02:46:59,794 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.326923076923077) internal successors, (173), 52 states have internal predecessors, (173), 0 states have call successors, (0), 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 39 [2022-11-03 02:46:59,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:59,797 INFO L225 Difference]: With dead ends: 971 [2022-11-03 02:46:59,797 INFO L226 Difference]: Without dead ends: 823 [2022-11-03 02:46:59,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6496 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=4463, Invalid=21619, Unknown=0, NotChecked=0, Total=26082 [2022-11-03 02:46:59,803 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1476 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 752 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:59,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 2555 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1768 Invalid, 0 Unknown, 752 Unchecked, 1.7s Time] [2022-11-03 02:46:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-11-03 02:46:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 177. [2022-11-03 02:46:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.2443181818181819) internal successors, (219), 176 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 219 transitions. [2022-11-03 02:46:59,834 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 219 transitions. Word has length 39 [2022-11-03 02:46:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:59,834 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 219 transitions. [2022-11-03 02:46:59,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.326923076923077) internal successors, (173), 52 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 219 transitions. [2022-11-03 02:46:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:46:59,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:59,836 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:59,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:00,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:00,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:00,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:00,449 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:00,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:00,450 INFO L85 PathProgramCache]: Analyzing trace with hash 443156417, now seen corresponding path program 1 times [2022-11-03 02:47:00,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:00,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670339789] [2022-11-03 02:47:00,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:00,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:00,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:00,452 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:00,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:47:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:00,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:47:00,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:00,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:01,437 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:01,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670339789] [2022-11-03 02:47:01,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670339789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:01,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267827564] [2022-11-03 02:47:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:01,438 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:01,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:01,439 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:01,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 02:47:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:01,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:47:01,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:01,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:01,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267827564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:01,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357948919] [2022-11-03 02:47:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:01,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:01,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:01,873 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:01,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 02:47:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:01,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:47:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:47:02,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:47:02,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357948919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:02,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:02,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 8, 8] total 34 [2022-11-03 02:47:02,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724145448] [2022-11-03 02:47:02,673 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:02,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:47:02,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:02,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:47:02,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1037, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:47:02,675 INFO L87 Difference]: Start difference. First operand 177 states and 219 transitions. Second operand has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:08,412 INFO L93 Difference]: Finished difference Result 686 states and 850 transitions. [2022-11-03 02:47:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-03 02:47:08,413 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 0 states have call successors, (0), 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 39 [2022-11-03 02:47:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:08,416 INFO L225 Difference]: With dead ends: 686 [2022-11-03 02:47:08,416 INFO L226 Difference]: Without dead ends: 527 [2022-11-03 02:47:08,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1661, Invalid=8041, Unknown=0, NotChecked=0, Total=9702 [2022-11-03 02:47:08,419 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 619 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 745 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:08,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 1610 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1007 Invalid, 0 Unknown, 745 Unchecked, 1.1s Time] [2022-11-03 02:47:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-11-03 02:47:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 165. [2022-11-03 02:47:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2317073170731707) internal successors, (202), 164 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 202 transitions. [2022-11-03 02:47:08,447 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 202 transitions. Word has length 39 [2022-11-03 02:47:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:08,447 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 202 transitions. [2022-11-03 02:47:08,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:08,448 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 202 transitions. [2022-11-03 02:47:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:47:08,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:08,449 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:08,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:08,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:08,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:09,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:09,053 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:09,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:09,053 INFO L85 PathProgramCache]: Analyzing trace with hash 252938957, now seen corresponding path program 1 times [2022-11-03 02:47:09,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:09,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433176639] [2022-11-03 02:47:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:09,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:09,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:09,055 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:09,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:47:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:09,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:47:09,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:47:09,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:47:10,049 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:10,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433176639] [2022-11-03 02:47:10,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433176639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:10,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [872417749] [2022-11-03 02:47:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:10,050 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:10,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:10,051 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:10,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 02:47:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:10,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:47:10,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:10,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:11,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [872417749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:11,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745237956] [2022-11-03 02:47:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:11,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:11,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:11,065 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:11,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 02:47:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:11,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:47:11,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:47:11,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:47:12,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745237956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:12,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:12,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15, 15, 12, 12] total 44 [2022-11-03 02:47:12,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993671254] [2022-11-03 02:47:12,363 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:12,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:47:12,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:47:12,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1727, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:47:12,366 INFO L87 Difference]: Start difference. First operand 165 states and 202 transitions. Second operand has 44 states, 44 states have (on average 3.5681818181818183) internal successors, (157), 44 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:16,964 INFO L93 Difference]: Finished difference Result 981 states and 1179 transitions. [2022-11-03 02:47:16,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-03 02:47:16,965 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.5681818181818183) internal successors, (157), 44 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-03 02:47:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:16,966 INFO L225 Difference]: With dead ends: 981 [2022-11-03 02:47:16,966 INFO L226 Difference]: Without dead ends: 834 [2022-11-03 02:47:16,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5419 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3644, Invalid=15262, Unknown=0, NotChecked=0, Total=18906 [2022-11-03 02:47:16,968 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1469 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:16,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1469 Valid, 1058 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 597 Invalid, 0 Unknown, 235 Unchecked, 0.8s Time] [2022-11-03 02:47:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-11-03 02:47:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 194. [2022-11-03 02:47:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.233160621761658) internal successors, (238), 193 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 238 transitions. [2022-11-03 02:47:16,999 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 238 transitions. Word has length 56 [2022-11-03 02:47:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:17,000 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 238 transitions. [2022-11-03 02:47:17,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.5681818181818183) internal successors, (157), 44 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 238 transitions. [2022-11-03 02:47:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:47:17,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:17,001 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:17,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:17,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:17,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:17,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:47:17,629 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:17,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1333561903, now seen corresponding path program 2 times [2022-11-03 02:47:17,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:17,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824279101] [2022-11-03 02:47:17,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:17,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:17,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:17,631 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:17,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:47:17,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:17,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:17,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:47:17,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:47:18,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:47:19,584 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:19,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824279101] [2022-11-03 02:47:19,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824279101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:19,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [89898042] [2022-11-03 02:47:19,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:19,585 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:19,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:19,589 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:19,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 02:47:19,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:19,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:19,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:47:19,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:47:20,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:47:23,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [89898042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611670362] [2022-11-03 02:47:23,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:23,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:23,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:23,790 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:23,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 02:47:23,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:23,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:23,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:47:23,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:24,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:25,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611670362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:25,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:25,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15, 15, 17, 17] total 58 [2022-11-03 02:47:25,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737395917] [2022-11-03 02:47:25,789 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:25,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-03 02:47:25,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:25,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-03 02:47:25,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=3102, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:47:25,791 INFO L87 Difference]: Start difference. First operand 194 states and 238 transitions. Second operand has 58 states, 58 states have (on average 3.6379310344827585) internal successors, (211), 58 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:39,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:39,183 INFO L93 Difference]: Finished difference Result 1309 states and 1614 transitions. [2022-11-03 02:47:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-03 02:47:39,184 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.6379310344827585) internal successors, (211), 58 states have internal predecessors, (211), 0 states have call successors, (0), 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 56 [2022-11-03 02:47:39,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:39,185 INFO L225 Difference]: With dead ends: 1309 [2022-11-03 02:47:39,185 INFO L226 Difference]: Without dead ends: 1133 [2022-11-03 02:47:39,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 281 SyntacticMatches, 50 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7294 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=3376, Invalid=18086, Unknown=0, NotChecked=0, Total=21462 [2022-11-03 02:47:39,187 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1403 mSDsluCounter, 2436 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1403 SdHoareTripleChecker+Valid, 2512 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1489 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:39,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1403 Valid, 2512 Invalid, 2681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1060 Invalid, 0 Unknown, 1489 Unchecked, 1.2s Time] [2022-11-03 02:47:39,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-11-03 02:47:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 222. [2022-11-03 02:47:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.239819004524887) internal successors, (274), 221 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 02:47:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 274 transitions. [2022-11-03 02:47:39,220 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 274 transitions. Word has length 56 [2022-11-03 02:47:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:39,220 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 274 transitions. [2022-11-03 02:47:39,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.6379310344827585) internal successors, (211), 58 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 274 transitions. [2022-11-03 02:47:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:47:39,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:39,222 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:39,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 02:47:39,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:39,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:39,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:39,836 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:39,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1830552629, now seen corresponding path program 1 times [2022-11-03 02:47:39,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:39,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840689003] [2022-11-03 02:47:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:39,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:39,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:39,838 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:39,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:47:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:39,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:47:39,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:47:40,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:47:40,645 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:40,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840689003] [2022-11-03 02:47:40,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840689003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:40,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2041833200] [2022-11-03 02:47:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:40,646 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:40,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:40,647 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:40,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 02:47:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:40,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:47:40,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:41,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:42,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2041833200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:42,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187053570] [2022-11-03 02:47:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:42,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:42,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:42,158 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:42,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 02:47:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:42,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:47:42,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:47:42,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:47:43,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187053570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:43,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:43,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16, 16, 8, 8] total 55 [2022-11-03 02:47:43,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724800350] [2022-11-03 02:47:43,127 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:43,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 02:47:43,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 02:47:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2763, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:47:43,129 INFO L87 Difference]: Start difference. First operand 222 states and 274 transitions. Second operand has 55 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 55 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:51,991 INFO L93 Difference]: Finished difference Result 1074 states and 1309 transitions. [2022-11-03 02:47:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-03 02:47:51,993 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 55 states have internal predecessors, (212), 0 states have call successors, (0), 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 56 [2022-11-03 02:47:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:51,996 INFO L225 Difference]: With dead ends: 1074 [2022-11-03 02:47:51,996 INFO L226 Difference]: Without dead ends: 855 [2022-11-03 02:47:51,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6801 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3960, Invalid=20532, Unknown=0, NotChecked=0, Total=24492 [2022-11-03 02:47:51,999 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 2232 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2232 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:51,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2232 Valid, 1495 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 1353 Invalid, 0 Unknown, 411 Unchecked, 1.3s Time] [2022-11-03 02:47:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-11-03 02:47:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 180. [2022-11-03 02:47:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.217877094972067) internal successors, (218), 179 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 218 transitions. [2022-11-03 02:47:52,029 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 218 transitions. Word has length 56 [2022-11-03 02:47:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:52,029 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 218 transitions. [2022-11-03 02:47:52,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 55 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 218 transitions. [2022-11-03 02:47:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:47:52,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:52,031 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:52,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:52,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:52,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:52,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:52,645 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:52,645 INFO L85 PathProgramCache]: Analyzing trace with hash -233901879, now seen corresponding path program 2 times [2022-11-03 02:47:52,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:52,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479278493] [2022-11-03 02:47:52,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:52,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:52,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:52,647 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:52,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:47:52,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:52,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:52,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:47:52,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:47:53,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:47:54,511 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:54,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479278493] [2022-11-03 02:47:54,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479278493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:54,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [991288474] [2022-11-03 02:47:54,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:54,512 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:54,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:54,512 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:54,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 02:47:54,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:54,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:54,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:47:54,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:47:55,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:47:55,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [991288474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:55,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700129033] [2022-11-03 02:47:55,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:55,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:55,806 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:55,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-03 02:47:55,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:55,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:55,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:47:55,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:47:56,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:47:57,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700129033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:57,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:57,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2022-11-03 02:47:57,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640399516] [2022-11-03 02:47:57,007 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:57,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:47:57,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:57,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:47:57,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:47:57,008 INFO L87 Difference]: Start difference. First operand 180 states and 218 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:57,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:57,951 INFO L93 Difference]: Finished difference Result 332 states and 405 transitions. [2022-11-03 02:47:57,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:47:57,952 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 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 56 [2022-11-03 02:47:57,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:57,953 INFO L225 Difference]: With dead ends: 332 [2022-11-03 02:47:57,953 INFO L226 Difference]: Without dead ends: 330 [2022-11-03 02:47:57,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 308 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=390, Invalid=1416, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:47:57,954 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 203 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:57,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 528 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 161 Invalid, 0 Unknown, 197 Unchecked, 0.2s Time] [2022-11-03 02:47:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-03 02:47:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 192. [2022-11-03 02:47:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.219895287958115) internal successors, (233), 191 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 233 transitions. [2022-11-03 02:47:57,984 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 233 transitions. Word has length 56 [2022-11-03 02:47:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:57,984 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 233 transitions. [2022-11-03 02:47:57,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 233 transitions. [2022-11-03 02:47:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:47:57,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:57,985 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:57,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-03 02:47:58,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:58,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:58,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:47:58,601 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:58,602 INFO L85 PathProgramCache]: Analyzing trace with hash -232054837, now seen corresponding path program 1 times [2022-11-03 02:47:58,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:58,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743143333] [2022-11-03 02:47:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:58,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:58,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:58,604 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:58,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 02:47:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:58,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:47:58,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:47:59,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:48:00,325 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:00,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743143333] [2022-11-03 02:48:00,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743143333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:00,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1245985607] [2022-11-03 02:48:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:00,326 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:00,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:00,329 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:00,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-03 02:48:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:00,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:48:00,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:48:01,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:48:01,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1245985607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:01,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512436003] [2022-11-03 02:48:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:01,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:01,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:01,407 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:01,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-03 02:48:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:01,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:48:01,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:48:02,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:48:02,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512436003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:02,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:02,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 10, 10] total 36 [2022-11-03 02:48:02,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956977373] [2022-11-03 02:48:02,708 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:02,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:48:02,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:02,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:48:02,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:48:02,710 INFO L87 Difference]: Start difference. First operand 192 states and 233 transitions. Second operand has 36 states, 36 states have (on average 4.472222222222222) internal successors, (161), 36 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:04,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:04,901 INFO L93 Difference]: Finished difference Result 686 states and 826 transitions. [2022-11-03 02:48:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 02:48:04,902 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.472222222222222) internal successors, (161), 36 states have internal predecessors, (161), 0 states have call successors, (0), 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 56 [2022-11-03 02:48:04,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:04,903 INFO L225 Difference]: With dead ends: 686 [2022-11-03 02:48:04,903 INFO L226 Difference]: Without dead ends: 498 [2022-11-03 02:48:04,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=872, Invalid=3958, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 02:48:04,904 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 370 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:04,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 646 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 420 Invalid, 0 Unknown, 391 Unchecked, 0.4s Time] [2022-11-03 02:48:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-03 02:48:04,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 405. [2022-11-03 02:48:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.2178217821782178) internal successors, (492), 404 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 492 transitions. [2022-11-03 02:48:04,966 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 492 transitions. Word has length 56 [2022-11-03 02:48:04,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:04,967 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 492 transitions. [2022-11-03 02:48:04,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.472222222222222) internal successors, (161), 36 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 492 transitions. [2022-11-03 02:48:04,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:48:04,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:04,968 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:04,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:05,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:05,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:05,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:05,573 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:05,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:05,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1045961799, now seen corresponding path program 1 times [2022-11-03 02:48:05,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:05,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065559539] [2022-11-03 02:48:05,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:05,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:05,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:05,575 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:05,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:48:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:05,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:48:05,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:48:05,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:48:06,422 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:06,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065559539] [2022-11-03 02:48:06,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065559539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:06,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [886462043] [2022-11-03 02:48:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:06,423 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:06,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:06,424 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:06,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-03 02:48:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:06,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:48:06,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:48:07,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:48:07,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [886462043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:07,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042680947] [2022-11-03 02:48:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:07,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:07,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:07,776 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:07,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-03 02:48:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:07,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:48:07,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:48:08,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:48:08,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042680947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:08,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:08,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15, 13, 6, 6] total 45 [2022-11-03 02:48:08,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003673404] [2022-11-03 02:48:08,518 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:08,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-03 02:48:08,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:08,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-03 02:48:08,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1831, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:48:08,520 INFO L87 Difference]: Start difference. First operand 405 states and 492 transitions. Second operand has 45 states, 45 states have (on average 4.2444444444444445) internal successors, (191), 45 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:12,632 INFO L93 Difference]: Finished difference Result 1447 states and 1742 transitions. [2022-11-03 02:48:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-03 02:48:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.2444444444444445) internal successors, (191), 45 states have internal predecessors, (191), 0 states have call successors, (0), 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 56 [2022-11-03 02:48:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:12,651 INFO L225 Difference]: With dead ends: 1447 [2022-11-03 02:48:12,652 INFO L226 Difference]: Without dead ends: 1060 [2022-11-03 02:48:12,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1914, Invalid=7398, Unknown=0, NotChecked=0, Total=9312 [2022-11-03 02:48:12,654 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 466 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:12,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 760 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 499 Invalid, 0 Unknown, 115 Unchecked, 0.6s Time] [2022-11-03 02:48:12,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-11-03 02:48:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 390. [2022-11-03 02:48:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.2082262210796915) internal successors, (470), 389 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 470 transitions. [2022-11-03 02:48:12,741 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 470 transitions. Word has length 56 [2022-11-03 02:48:12,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:12,741 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 470 transitions. [2022-11-03 02:48:12,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.2444444444444445) internal successors, (191), 45 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:12,742 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 470 transitions. [2022-11-03 02:48:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:48:12,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:12,743 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:12,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:12,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:13,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:13,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:13,361 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:13,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:13,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1820402739, now seen corresponding path program 2 times [2022-11-03 02:48:13,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:13,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922650998] [2022-11-03 02:48:13,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:13,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:13,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:13,363 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:13,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 02:48:13,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:13,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:13,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:48:13,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:48:13,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:48:14,152 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:14,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922650998] [2022-11-03 02:48:14,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922650998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:14,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1532126508] [2022-11-03 02:48:14,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:14,153 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:14,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:14,154 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:14,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-03 02:48:14,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:14,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:14,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:48:14,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:48:15,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:48:17,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1532126508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:17,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318787360] [2022-11-03 02:48:17,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:17,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:17,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:17,741 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:17,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-03 02:48:17,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:17,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:17,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:48:17,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:18,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:18,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318787360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:18,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:18,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15, 15, 16, 16] total 56 [2022-11-03 02:48:18,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443216383] [2022-11-03 02:48:18,872 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:18,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 02:48:18,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:18,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 02:48:18,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2879, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:48:18,874 INFO L87 Difference]: Start difference. First operand 390 states and 470 transitions. Second operand has 56 states, 56 states have (on average 3.5535714285714284) internal successors, (199), 56 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:30,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:30,119 INFO L93 Difference]: Finished difference Result 1543 states and 1846 transitions. [2022-11-03 02:48:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-03 02:48:30,119 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.5535714285714284) internal successors, (199), 56 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-03 02:48:30,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:30,122 INFO L225 Difference]: With dead ends: 1543 [2022-11-03 02:48:30,122 INFO L226 Difference]: Without dead ends: 1171 [2022-11-03 02:48:30,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 274 SyntacticMatches, 30 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6660 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3604, Invalid=17276, Unknown=0, NotChecked=0, Total=20880 [2022-11-03 02:48:30,124 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 947 mSDsluCounter, 2738 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 821 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:30,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 2846 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1632 Invalid, 0 Unknown, 821 Unchecked, 1.6s Time] [2022-11-03 02:48:30,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-11-03 02:48:30,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 400. [2022-11-03 02:48:30,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.205513784461153) internal successors, (481), 399 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:30,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 481 transitions. [2022-11-03 02:48:30,204 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 481 transitions. Word has length 56 [2022-11-03 02:48:30,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:30,204 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 481 transitions. [2022-11-03 02:48:30,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.5535714285714284) internal successors, (199), 56 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 481 transitions. [2022-11-03 02:48:30,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:48:30,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:30,206 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:30,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:30,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:30,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:30,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:48:30,810 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:30,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1208071785, now seen corresponding path program 1 times [2022-11-03 02:48:30,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:30,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910131824] [2022-11-03 02:48:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:30,811 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:30,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:30,812 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:30,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 02:48:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:30,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 02:48:30,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:48:31,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:48:32,957 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:32,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910131824] [2022-11-03 02:48:32,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910131824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:32,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [362077935] [2022-11-03 02:48:32,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:32,957 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:32,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:32,958 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:32,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-03 02:48:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:33,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:48:33,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:48:34,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:48:34,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [362077935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:34,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657257324] [2022-11-03 02:48:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:34,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:34,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:34,732 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:34,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-03 02:48:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:34,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:48:34,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 17 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:35,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:35,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657257324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:35,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:35,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13, 13, 17, 17] total 54 [2022-11-03 02:48:35,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889628351] [2022-11-03 02:48:35,895 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:35,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-03 02:48:35,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:35,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-03 02:48:35,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2625, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 02:48:35,896 INFO L87 Difference]: Start difference. First operand 400 states and 481 transitions. Second operand has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:43,535 INFO L93 Difference]: Finished difference Result 1264 states and 1524 transitions. [2022-11-03 02:48:43,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-03 02:48:43,535 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 0 states have call successors, (0), 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 56 [2022-11-03 02:48:43,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:43,537 INFO L225 Difference]: With dead ends: 1264 [2022-11-03 02:48:43,538 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 02:48:43,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4060 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2536, Invalid=15554, Unknown=0, NotChecked=0, Total=18090 [2022-11-03 02:48:43,539 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 1057 mSDsluCounter, 1885 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 805 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:43,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1057 Valid, 1955 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1512 Invalid, 0 Unknown, 805 Unchecked, 1.5s Time] [2022-11-03 02:48:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 02:48:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 339. [2022-11-03 02:48:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.1863905325443787) internal successors, (401), 338 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 401 transitions. [2022-11-03 02:48:43,590 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 401 transitions. Word has length 56 [2022-11-03 02:48:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:43,591 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 401 transitions. [2022-11-03 02:48:43,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 401 transitions. [2022-11-03 02:48:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:48:43,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:43,592 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:43,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:43,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:44,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-11-03 02:48:44,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:44,209 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:44,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:44,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2010583505, now seen corresponding path program 3 times [2022-11-03 02:48:44,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:44,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786586069] [2022-11-03 02:48:44,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:48:44,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:44,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:44,211 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:44,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 02:48:44,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:48:44,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:44,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:48:44,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 39 proven. 48 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:48:44,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 39 proven. 48 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:48:45,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:45,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786586069] [2022-11-03 02:48:45,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786586069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:45,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1095418075] [2022-11-03 02:48:45,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:48:45,668 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:45,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:45,669 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:45,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 02:48:45,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:48:45,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:45,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:48:45,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:48:46,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:48:47,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1095418075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:47,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460428779] [2022-11-03 02:48:47,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:48:47,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:47,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:47,051 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:47,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-03 02:48:47,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:48:47,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:47,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:48:47,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:48:47,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 37 proven. 50 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:48:47,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460428779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:47,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:47,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 15] total 52 [2022-11-03 02:48:47,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277799850] [2022-11-03 02:48:47,854 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-03 02:48:47,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-03 02:48:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2416, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:48:47,856 INFO L87 Difference]: Start difference. First operand 339 states and 401 transitions. Second operand has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:50,962 INFO L93 Difference]: Finished difference Result 1035 states and 1242 transitions. [2022-11-03 02:48:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:48:50,962 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 0 states have call successors, (0), 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 73 [2022-11-03 02:48:50,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:50,965 INFO L225 Difference]: With dead ends: 1035 [2022-11-03 02:48:50,965 INFO L226 Difference]: Without dead ends: 737 [2022-11-03 02:48:50,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1232, Invalid=6424, Unknown=0, NotChecked=0, Total=7656 [2022-11-03 02:48:50,967 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 401 mSDsluCounter, 2162 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2253 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:50,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 2253 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 989 Invalid, 0 Unknown, 109 Unchecked, 1.0s Time] [2022-11-03 02:48:50,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-11-03 02:48:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 371. [2022-11-03 02:48:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.181081081081081) internal successors, (437), 370 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 437 transitions. [2022-11-03 02:48:51,029 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 437 transitions. Word has length 73 [2022-11-03 02:48:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:51,029 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 437 transitions. [2022-11-03 02:48:51,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 437 transitions. [2022-11-03 02:48:51,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:48:51,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:51,031 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:51,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:51,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:51,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:51,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:48:51,635 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:51,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1006367155, now seen corresponding path program 2 times [2022-11-03 02:48:51,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:51,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653731624] [2022-11-03 02:48:51,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:51,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:51,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:51,637 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:51,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 02:48:51,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:51,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:51,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:48:51,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:48:52,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:48:53,689 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:53,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653731624] [2022-11-03 02:48:53,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653731624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:53,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [548915091] [2022-11-03 02:48:53,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:53,690 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:53,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:53,691 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:53,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-03 02:48:54,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:54,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:54,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:48:54,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:48:54,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:48:55,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [548915091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:55,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958022135] [2022-11-03 02:48:55,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:48:55,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:55,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:55,430 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:55,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-03 02:48:55,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:48:55,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:55,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:48:55,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:48:56,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:48:56,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958022135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:56,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:56,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2022-11-03 02:48:56,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532534251] [2022-11-03 02:48:56,927 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:56,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:48:56,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:56,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:48:56,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:48:56,928 INFO L87 Difference]: Start difference. First operand 371 states and 437 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:57,820 INFO L93 Difference]: Finished difference Result 643 states and 776 transitions. [2022-11-03 02:48:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:48:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 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 73 [2022-11-03 02:48:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:57,823 INFO L225 Difference]: With dead ends: 643 [2022-11-03 02:48:57,823 INFO L226 Difference]: Without dead ends: 641 [2022-11-03 02:48:57,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 414 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=333, Invalid=999, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:48:57,824 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 163 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:57,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 492 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 133 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-11-03 02:48:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-11-03 02:48:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 377. [2022-11-03 02:48:57,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.178191489361702) internal successors, (443), 376 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:57,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 443 transitions. [2022-11-03 02:48:57,898 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 443 transitions. Word has length 73 [2022-11-03 02:48:57,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:57,898 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 443 transitions. [2022-11-03 02:48:57,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 443 transitions. [2022-11-03 02:48:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-03 02:48:57,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:57,900 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:57,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:58,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:58,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:58,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:48:58,505 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:58,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:58,505 INFO L85 PathProgramCache]: Analyzing trace with hash 274214093, now seen corresponding path program 3 times [2022-11-03 02:48:58,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:58,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612656542] [2022-11-03 02:48:58,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:48:58,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:58,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:58,507 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:58,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 02:48:58,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:48:58,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:58,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:48:58,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:48:58,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:48:59,259 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:59,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612656542] [2022-11-03 02:48:59,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612656542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:59,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [425499863] [2022-11-03 02:48:59,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:48:59,260 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:59,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:59,261 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:59,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 02:48:59,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:48:59,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:59,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:48:59,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:48:59,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:48:59,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [425499863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:59,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995894299] [2022-11-03 02:48:59,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:48:59,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:59,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:59,941 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:59,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-03 02:49:00,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:49:00,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:49:00,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:49:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 96 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:49:00,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 57 proven. 63 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:49:00,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995894299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:00,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:49:00,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 13, 13] total 32 [2022-11-03 02:49:00,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741980789] [2022-11-03 02:49:00,965 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:49:00,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 02:49:00,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:00,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 02:49:00,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:49:00,966 INFO L87 Difference]: Start difference. First operand 377 states and 443 transitions. Second operand has 32 states, 32 states have (on average 4.15625) internal successors, (133), 32 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:02,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:02,536 INFO L93 Difference]: Finished difference Result 950 states and 1125 transitions. [2022-11-03 02:49:02,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:49:02,537 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.15625) internal successors, (133), 32 states have internal predecessors, (133), 0 states have call successors, (0), 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 90 [2022-11-03 02:49:02,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:02,540 INFO L225 Difference]: With dead ends: 950 [2022-11-03 02:49:02,540 INFO L226 Difference]: Without dead ends: 612 [2022-11-03 02:49:02,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=734, Invalid=2236, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:49:02,541 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 430 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:02,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 1074 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:49:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-11-03 02:49:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 385. [2022-11-03 02:49:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.1744791666666667) internal successors, (451), 384 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 02:49:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 451 transitions. [2022-11-03 02:49:02,633 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 451 transitions. Word has length 90 [2022-11-03 02:49:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:02,633 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 451 transitions. [2022-11-03 02:49:02,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.15625) internal successors, (133), 32 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 451 transitions. [2022-11-03 02:49:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-03 02:49:02,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:02,634 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:02,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:02,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:03,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:03,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:03,235 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:03,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:03,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1554077771, now seen corresponding path program 4 times [2022-11-03 02:49:03,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:03,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811663130] [2022-11-03 02:49:03,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:49:03,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:03,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:03,237 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:03,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 02:49:03,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:49:03,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:49:03,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:49:03,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 50 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:49:03,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 50 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:49:04,689 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:04,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811663130] [2022-11-03 02:49:04,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811663130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:04,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1493762330] [2022-11-03 02:49:04,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:49:04,690 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:04,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:04,691 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:04,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-03 02:49:05,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:49:05,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:49:05,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:49:05,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 50 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:49:05,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 50 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 02:49:06,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1493762330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:06,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524916094] [2022-11-03 02:49:06,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:49:06,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:06,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:06,025 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:06,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-03 02:49:06,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:49:06,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:49:06,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:49:06,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:49:06,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 53 proven. 52 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 02:49:07,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524916094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:07,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:49:07,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 34 [2022-11-03 02:49:07,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271867516] [2022-11-03 02:49:07,171 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:49:07,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:49:07,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:07,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:49:07,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:49:07,173 INFO L87 Difference]: Start difference. First operand 385 states and 451 transitions. Second operand has 34 states, 34 states have (on average 5.617647058823529) internal successors, (191), 34 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:08,146 INFO L93 Difference]: Finished difference Result 523 states and 605 transitions. [2022-11-03 02:49:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:49:08,146 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.617647058823529) internal successors, (191), 34 states have internal predecessors, (191), 0 states have call successors, (0), 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 90 [2022-11-03 02:49:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:08,146 INFO L225 Difference]: With dead ends: 523 [2022-11-03 02:49:08,146 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 02:49:08,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 510 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=515, Invalid=2241, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 02:49:08,148 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 136 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:08,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 411 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 150 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2022-11-03 02:49:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 02:49:08,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 02:49:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 02:49:08,149 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2022-11-03 02:49:08,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:08,149 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 02:49:08,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.617647058823529) internal successors, (191), 34 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:08,150 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 02:49:08,150 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 02:49:08,153 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:49:08,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:08,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:08,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:08,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9c97634-574b-444a-8f92-adcd9b324204/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:08,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.