./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/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_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be1dcf4f68625d62d28b81607385317c3749a3b9c4401099e862ce9a8a6e6751 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:51:44,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:51:44,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:51:45,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:51:45,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:51:45,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:51:45,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:51:45,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:51:45,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:51:45,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:51:45,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:51:45,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:51:45,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:51:45,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:51:45,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:51:45,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:51:45,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:51:45,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:51:45,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:51:45,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:51:45,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:51:45,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:51:45,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:51:45,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:51:45,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:51:45,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:51:45,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:51:45,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:51:45,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:51:45,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:51:45,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:51:45,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:51:45,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:51:45,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:51:45,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:51:45,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:51:45,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:51:45,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:51:45,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:51:45,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:51:45,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:51:45,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:51:45,122 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:51:45,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:51:45,123 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:51:45,123 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:51:45,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:51:45,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:51:45,125 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:51:45,125 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:51:45,125 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:51:45,125 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:51:45,126 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:51:45,126 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:51:45,126 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:51:45,127 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:51:45,127 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:51:45,127 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:51:45,127 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:51:45,128 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:51:45,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:51:45,129 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:51:45,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:51:45,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:51:45,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:51:45,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:51:45,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:51:45,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:51:45,131 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:51:45,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:51:45,131 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:51:45,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:51:45,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:51:45,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:51:45,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:51:45,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:51:45,133 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:51:45,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:51:45,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:51:45,134 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:51:45,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:51:45,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:51:45,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:51:45,135 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_2f4836ff-de18-46de-a6cf-fe779c5c2921/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be1dcf4f68625d62d28b81607385317c3749a3b9c4401099e862ce9a8a6e6751 [2022-11-03 03:51:45,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:51:45,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:51:45,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:51:45,455 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:51:45,456 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:51:45,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-1.i [2022-11-03 03:51:45,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/data/870f6450f/e7fd0728fc53461aa8be8712c9b2d687/FLAG2c9836834 [2022-11-03 03:51:46,195 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:51:46,195 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-1.i [2022-11-03 03:51:46,250 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/data/870f6450f/e7fd0728fc53461aa8be8712c9b2d687/FLAG2c9836834 [2022-11-03 03:51:46,435 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/data/870f6450f/e7fd0728fc53461aa8be8712c9b2d687 [2022-11-03 03:51:46,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:51:46,438 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:51:46,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:51:46,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:51:46,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:51:46,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:46" (1/1) ... [2022-11-03 03:51:46,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4299ffc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:46, skipping insertion in model container [2022-11-03 03:51:46,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:46" (1/1) ... [2022-11-03 03:51:46,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:51:46,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:51:47,035 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_2f4836ff-de18-46de-a6cf-fe779c5c2921/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-1.i[33021,33034] [2022-11-03 03:51:47,228 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:51:47,239 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:51:47,280 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_2f4836ff-de18-46de-a6cf-fe779c5c2921/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-1.i[33021,33034] [2022-11-03 03:51:47,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:51:47,358 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:51:47,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47 WrapperNode [2022-11-03 03:51:47,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:51:47,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:51:47,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:51:47,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:51:47,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47" (1/1) ... [2022-11-03 03:51:47,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47" (1/1) ... [2022-11-03 03:51:47,503 INFO L138 Inliner]: procedures = 177, calls = 349, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1153 [2022-11-03 03:51:47,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:51:47,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:51:47,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:51:47,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:51:47,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47" (1/1) ... [2022-11-03 03:51:47,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47" (1/1) ... [2022-11-03 03:51:47,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47" (1/1) ... [2022-11-03 03:51:47,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47" (1/1) ... [2022-11-03 03:51:47,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47" (1/1) ... [2022-11-03 03:51:47,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47" (1/1) ... [2022-11-03 03:51:47,591 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47" (1/1) ... [2022-11-03 03:51:47,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47" (1/1) ... [2022-11-03 03:51:47,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:51:47,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:51:47,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:51:47,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:51:47,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47" (1/1) ... [2022-11-03 03:51:47,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:51:47,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:47,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:51:47,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:51:47,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:51:47,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 03:51:47,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 03:51:47,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:51:47,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 03:51:47,714 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 03:51:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:51:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:51:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:51:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:51:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:51:47,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:51:47,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:51:47,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:51:47,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:51:48,021 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:51:48,028 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:51:49,999 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:51:50,441 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:51:50,441 INFO L300 CfgBuilder]: Removed 60 assume(true) statements. [2022-11-03 03:51:50,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:50 BoogieIcfgContainer [2022-11-03 03:51:50,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:51:50,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:51:50,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:51:50,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:51:50,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:51:46" (1/3) ... [2022-11-03 03:51:50,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227d039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:50, skipping insertion in model container [2022-11-03 03:51:50,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:47" (2/3) ... [2022-11-03 03:51:50,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227d039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:50, skipping insertion in model container [2022-11-03 03:51:50,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:50" (3/3) ... [2022-11-03 03:51:50,460 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test4-1.i [2022-11-03 03:51:50,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:51:50,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:51:50,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:51:50,549 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;@57a8c6d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:51:50,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:51:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 107 states have (on average 1.794392523364486) internal successors, (192), 118 states have internal predecessors, (192), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 03:51:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 03:51:50,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:50,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:50,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:50,568 INFO L85 PathProgramCache]: Analyzing trace with hash 932638747, now seen corresponding path program 1 times [2022-11-03 03:51:50,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:50,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172113448] [2022-11-03 03:51:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:50,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:50,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:50,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172113448] [2022-11-03 03:51:50,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172113448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:50,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:50,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:51:50,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577615592] [2022-11-03 03:51:50,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:50,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:50,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:50,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:50,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:51:50,855 INFO L87 Difference]: Start difference. First operand has 127 states, 107 states have (on average 1.794392523364486) internal successors, (192), 118 states have internal predecessors, (192), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:54,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:51:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:54,431 INFO L93 Difference]: Finished difference Result 347 states and 628 transitions. [2022-11-03 03:51:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:54,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 03:51:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:54,474 INFO L225 Difference]: With dead ends: 347 [2022-11-03 03:51:54,475 INFO L226 Difference]: Without dead ends: 220 [2022-11-03 03:51:54,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:51:54,482 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 97 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:54,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 317 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 03:51:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-03 03:51:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 127. [2022-11-03 03:51:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 108 states have (on average 1.212962962962963) internal successors, (131), 118 states have internal predecessors, (131), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 03:51:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2022-11-03 03:51:54,534 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 8 [2022-11-03 03:51:54,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:54,535 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2022-11-03 03:51:54,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:54,536 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2022-11-03 03:51:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 03:51:54,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:54,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:54,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:51:54,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:54,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1435055736, now seen corresponding path program 1 times [2022-11-03 03:51:54,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:54,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698977196] [2022-11-03 03:51:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:54,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:54,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:51:54,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407876691] [2022-11-03 03:51:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:54,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:54,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:54,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:54,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:51:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:56,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 3056 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:51:56,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:56,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:56,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:56,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698977196] [2022-11-03 03:51:56,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:51:56,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407876691] [2022-11-03 03:51:56,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407876691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:56,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [238120799] [2022-11-03 03:51:56,607 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-03 03:51:56,607 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:51:56,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:51:56,619 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:51:56,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:51:56,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:56,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 03:51:56,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:56,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 03:51:56,884 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:51:56,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 03:51:56,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 03:51:56,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:56,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:51:56,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2022-11-03 03:51:57,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 03:51:57,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 03:51:57,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:51:57,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:51:57,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 03:51:57,431 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:51:57,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-03 03:51:57,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:57,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 03:51:57,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:57,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:51:57,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:57,476 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:51:57,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:51:57,525 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:51:57,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 03:51:57,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:57,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 03:51:57,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:51:57,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:51:57,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 03:51:57,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 03:51:57,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 03:51:57,980 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:51:58,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [238120799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:58,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:58,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3] total 11 [2022-11-03 03:51:58,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443667419] [2022-11-03 03:51:58,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:58,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:51:58,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:58,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:51:58,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:51:58,957 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:03,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:52:05,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:52:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:05,543 INFO L93 Difference]: Finished difference Result 271 states and 347 transitions. [2022-11-03 03:52:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:52:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 03:52:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:05,545 INFO L225 Difference]: With dead ends: 271 [2022-11-03 03:52:05,546 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 03:52:05,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:52:05,548 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 13 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:05,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 465 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-11-03 03:52:05,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 03:52:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2022-11-03 03:52:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 118 states have (on average 1.194915254237288) internal successors, (141), 128 states have internal predecessors, (141), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 03:52:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2022-11-03 03:52:05,566 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 52 [2022-11-03 03:52:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:05,567 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2022-11-03 03:52:05,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2022-11-03 03:52:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:52:05,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:05,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:05,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:05,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 03:52:05,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:05,797 INFO L85 PathProgramCache]: Analyzing trace with hash 886940783, now seen corresponding path program 1 times [2022-11-03 03:52:05,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:52:05,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898103546] [2022-11-03 03:52:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:05,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:52:06,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:52:06,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440105774] [2022-11-03 03:52:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:06,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:06,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:06,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:52:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:07,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:52:07,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:52:07,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:52:07,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:52:07,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898103546] [2022-11-03 03:52:07,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:52:07,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440105774] [2022-11-03 03:52:07,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440105774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:07,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [479475147] [2022-11-03 03:52:07,522 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-03 03:52:07,522 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:52:07,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:52:07,523 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:52:07,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:52:07,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:07,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:07,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:07,639 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:52:07,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:52:07,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:07,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 03:52:07,702 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:52:07,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 03:52:07,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 03:52:07,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:07,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 03:52:08,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 03:52:08,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 03:52:08,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:52:08,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:52:08,088 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:52:08,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2022-11-03 03:52:08,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 03:52:08,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 03:52:08,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 03:52:08,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 03:52:08,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 03:52:08,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 03:52:08,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 03:52:08,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:08,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 03:52:08,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:08,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 03:52:08,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:08,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:08,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:08,375 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:52:08,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:52:08,417 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:52:08,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-03 03:52:08,470 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:52:08,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 03:52:08,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:52:08,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:52:08,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 03:52:08,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 03:52:08,855 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:52:08,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2022-11-03 03:52:08,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 03:52:08,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 03:52:08,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 03:52:08,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 03:52:08,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 03:52:08,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 03:52:08,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 03:52:09,080 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 78 for LOIs [2022-11-03 03:52:09,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:52:10,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [479475147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:10,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:52:10,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [4, 4] total 17 [2022-11-03 03:52:10,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428109259] [2022-11-03 03:52:10,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:10,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:52:10,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:52:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:52:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:52:10,554 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:52:16,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:52:17,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:52:19,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:52:21,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:52:24,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:52:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:24,296 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2022-11-03 03:52:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:52:24,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-11-03 03:52:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:24,299 INFO L225 Difference]: With dead ends: 273 [2022-11-03 03:52:24,299 INFO L226 Difference]: Without dead ends: 148 [2022-11-03 03:52:24,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:52:24,300 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 11 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:24,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 648 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 287 Invalid, 1 Unknown, 88 Unchecked, 11.9s Time] [2022-11-03 03:52:24,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-03 03:52:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2022-11-03 03:52:24,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 132 states have internal predecessors, (145), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 03:52:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2022-11-03 03:52:24,332 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 65 [2022-11-03 03:52:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:24,333 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2022-11-03 03:52:24,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:52:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2022-11-03 03:52:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:52:24,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:24,344 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:24,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:24,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:24,544 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash -666566505, now seen corresponding path program 1 times [2022-11-03 03:52:24,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:52:24,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797552441] [2022-11-03 03:52:24,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:24,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:52:24,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:52:24,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909981187] [2022-11-03 03:52:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:24,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:24,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:24,721 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:24,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:52:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:25,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:52:25,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:52:26,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:52:26,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:52:26,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797552441] [2022-11-03 03:52:26,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:52:26,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909981187] [2022-11-03 03:52:26,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909981187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:26,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163490515] [2022-11-03 03:52:26,135 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-03 03:52:26,135 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:52:26,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:52:26,137 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:52:26,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:52:26,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:26,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 03:52:26,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:26,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 03:52:26,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:26,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:26,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:26,273 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:52:26,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:52:26,319 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 03:52:26,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-03 03:52:26,361 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:52:26,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 03:52:26,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 03:52:26,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 03:52:26,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 03:52:26,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:52:26,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 03:52:26,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 03:52:26,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 03:52:26,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 03:52:26,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 03:52:26,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 03:52:26,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 03:52:26,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 03:52:26,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 03:52:26,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:52:26,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:52:26,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:52:26,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-11-03 03:52:26,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:52:26,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:52:26,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:52:26,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:52:26,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:52:26,963 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:52:26,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 03:52:26,979 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:52:26,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 30 [2022-11-03 03:52:26,996 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:52:26,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 16 [2022-11-03 03:52:27,066 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:52:27,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 30 [2022-11-03 03:52:27,084 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:52:27,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 16 [2022-11-03 03:52:27,098 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:52:27,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 03:52:39,042 WARN L234 SmtUtils]: Spent 11.87s on a formula simplification. DAG size of input: 67 DAG size of output: 32 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 03:52:39,043 INFO L356 Elim1Store]: treesize reduction 340, result has 16.0 percent of original size [2022-11-03 03:52:39,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:39,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:39,245 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: |v_#memory_$Pointer$.base_508| input size 141 context size 141 output size 141 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 03:52:39,247 INFO L158 Benchmark]: Toolchain (without parser) took 52808.75ms. Allocated memory was 98.6MB in the beginning and 369.1MB in the end (delta: 270.5MB). Free memory was 62.8MB in the beginning and 122.2MB in the end (delta: -59.4MB). Peak memory consumption was 211.2MB. Max. memory is 16.1GB. [2022-11-03 03:52:39,247 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory was 53.7MB in the beginning and 53.7MB in the end (delta: 17.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:52:39,248 INFO L158 Benchmark]: CACSL2BoogieTranslator took 919.60ms. Allocated memory is still 98.6MB. Free memory was 62.6MB in the beginning and 48.6MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 03:52:39,248 INFO L158 Benchmark]: Boogie Procedure Inliner took 144.03ms. Allocated memory was 98.6MB in the beginning and 125.8MB in the end (delta: 27.3MB). Free memory was 48.6MB in the beginning and 94.2MB in the end (delta: -45.5MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. [2022-11-03 03:52:39,248 INFO L158 Benchmark]: Boogie Preprocessor took 100.88ms. Allocated memory is still 125.8MB. Free memory was 94.2MB in the beginning and 85.0MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 03:52:39,248 INFO L158 Benchmark]: RCFGBuilder took 2843.09ms. Allocated memory was 125.8MB in the beginning and 174.1MB in the end (delta: 48.2MB). Free memory was 85.0MB in the beginning and 77.7MB in the end (delta: 7.3MB). Peak memory consumption was 78.0MB. Max. memory is 16.1GB. [2022-11-03 03:52:39,249 INFO L158 Benchmark]: TraceAbstraction took 48794.08ms. Allocated memory was 174.1MB in the beginning and 369.1MB in the end (delta: 195.0MB). Free memory was 77.7MB in the beginning and 122.2MB in the end (delta: -44.5MB). Peak memory consumption was 149.7MB. Max. memory is 16.1GB. [2022-11-03 03:52:39,250 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory was 53.7MB in the beginning and 53.7MB in the end (delta: 17.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 919.60ms. Allocated memory is still 98.6MB. Free memory was 62.6MB in the beginning and 48.6MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 144.03ms. Allocated memory was 98.6MB in the beginning and 125.8MB in the end (delta: 27.3MB). Free memory was 48.6MB in the beginning and 94.2MB in the end (delta: -45.5MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 100.88ms. Allocated memory is still 125.8MB. Free memory was 94.2MB in the beginning and 85.0MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 2843.09ms. Allocated memory was 125.8MB in the beginning and 174.1MB in the end (delta: 48.2MB). Free memory was 85.0MB in the beginning and 77.7MB in the end (delta: 7.3MB). Peak memory consumption was 78.0MB. Max. memory is 16.1GB. * TraceAbstraction took 48794.08ms. Allocated memory was 174.1MB in the beginning and 369.1MB in the end (delta: 195.0MB). Free memory was 77.7MB in the beginning and 122.2MB in the end (delta: -44.5MB). Peak memory consumption was 149.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_508| input size 141 context size 141 output size 141 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_508| input size 141 context size 141 output size 141: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 03:52:39,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/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_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be1dcf4f68625d62d28b81607385317c3749a3b9c4401099e862ce9a8a6e6751 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:52:41,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:52:41,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:52:41,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:52:41,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:52:41,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:52:41,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:52:41,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:52:41,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:52:41,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:52:41,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:52:41,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:52:41,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:52:41,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:52:41,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:52:41,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:52:41,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:52:41,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:52:41,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:52:41,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:52:41,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:52:41,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:52:41,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:52:41,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:52:41,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:52:41,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:52:41,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:52:41,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:52:41,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:52:41,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:52:41,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:52:41,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:52:41,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:52:41,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:52:41,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:52:41,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:52:41,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:52:41,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:52:41,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:52:41,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:52:41,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:52:41,728 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 03:52:41,766 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:52:41,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:52:41,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:52:41,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:52:41,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:52:41,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:52:41,768 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:52:41,768 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:52:41,768 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:52:41,769 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:52:41,769 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:52:41,769 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:52:41,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:52:41,770 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:52:41,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:52:41,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:52:41,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:52:41,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:52:41,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:52:41,771 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:52:41,772 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:52:41,772 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:52:41,772 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:52:41,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:52:41,772 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:52:41,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:52:41,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:52:41,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:52:41,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:52:41,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:52:41,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:52:41,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:52:41,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:52:41,774 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:52:41,775 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:41,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:52:41,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:52:41,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:52:41,776 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_2f4836ff-de18-46de-a6cf-fe779c5c2921/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be1dcf4f68625d62d28b81607385317c3749a3b9c4401099e862ce9a8a6e6751 [2022-11-03 03:52:42,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:52:42,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:52:42,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:52:42,183 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:52:42,184 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:52:42,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-1.i [2022-11-03 03:52:42,253 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/data/abd9e908b/8d823ede02594aa1b0df8f02a4d2e111/FLAG3e55502fb [2022-11-03 03:52:42,934 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:52:42,948 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-1.i [2022-11-03 03:52:42,976 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/data/abd9e908b/8d823ede02594aa1b0df8f02a4d2e111/FLAG3e55502fb [2022-11-03 03:52:43,188 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/data/abd9e908b/8d823ede02594aa1b0df8f02a4d2e111 [2022-11-03 03:52:43,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:52:43,195 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:52:43,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:52:43,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:52:43,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:52:43,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:52:43" (1/1) ... [2022-11-03 03:52:43,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bfe2874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:43, skipping insertion in model container [2022-11-03 03:52:43,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:52:43" (1/1) ... [2022-11-03 03:52:43,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:52:43,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:52:43,731 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_2f4836ff-de18-46de-a6cf-fe779c5c2921/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-1.i[33021,33034] [2022-11-03 03:52:43,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:52:43,899 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 03:52:43,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:52:43,942 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_2f4836ff-de18-46de-a6cf-fe779c5c2921/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-1.i[33021,33034] [2022-11-03 03:52:44,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:52:44,048 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:52:44,089 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_2f4836ff-de18-46de-a6cf-fe779c5c2921/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test4-1.i[33021,33034] [2022-11-03 03:52:44,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:52:44,241 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:52:44,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44 WrapperNode [2022-11-03 03:52:44,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:52:44,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:52:44,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:52:44,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:52:44,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44" (1/1) ... [2022-11-03 03:52:44,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44" (1/1) ... [2022-11-03 03:52:44,378 INFO L138 Inliner]: procedures = 180, calls = 349, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1154 [2022-11-03 03:52:44,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:52:44,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:52:44,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:52:44,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:52:44,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44" (1/1) ... [2022-11-03 03:52:44,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44" (1/1) ... [2022-11-03 03:52:44,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44" (1/1) ... [2022-11-03 03:52:44,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44" (1/1) ... [2022-11-03 03:52:44,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44" (1/1) ... [2022-11-03 03:52:44,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44" (1/1) ... [2022-11-03 03:52:44,539 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44" (1/1) ... [2022-11-03 03:52:44,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44" (1/1) ... [2022-11-03 03:52:44,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:52:44,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:52:44,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:52:44,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:52:44,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44" (1/1) ... [2022-11-03 03:52:44,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:52:44,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:44,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:52:44,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:52:44,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 03:52:44,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 03:52:44,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 03:52:44,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 03:52:44,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 03:52:44,650 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 03:52:44,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:52:44,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:52:44,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:52:44,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:52:44,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:52:44,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:52:44,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 03:52:44,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 03:52:44,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:52:44,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:52:44,971 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:52:44,974 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:52:55,551 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:52:55,570 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:52:55,571 INFO L300 CfgBuilder]: Removed 60 assume(true) statements. [2022-11-03 03:52:55,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:52:55 BoogieIcfgContainer [2022-11-03 03:52:55,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:52:55,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:52:55,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:52:55,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:52:55,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:52:43" (1/3) ... [2022-11-03 03:52:55,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5714ef32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:52:55, skipping insertion in model container [2022-11-03 03:52:55,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:52:44" (2/3) ... [2022-11-03 03:52:55,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5714ef32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:52:55, skipping insertion in model container [2022-11-03 03:52:55,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:52:55" (3/3) ... [2022-11-03 03:52:55,585 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test4-1.i [2022-11-03 03:52:55,603 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:52:55,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:52:55,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:52:55,681 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;@3e140dfe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:52:55,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:52:55,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 191 states have (on average 1.6806282722513088) internal successors, (321), 202 states have internal predecessors, (321), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 03:52:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:52:55,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:55,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:55,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:55,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:55,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1530402564, now seen corresponding path program 1 times [2022-11-03 03:52:55,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:55,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10867652] [2022-11-03 03:52:55,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:55,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:55,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:55,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:55,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:52:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:55,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:52:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:56,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:56,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:56,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10867652] [2022-11-03 03:52:56,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10867652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:56,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:52:56,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:52:56,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692068184] [2022-11-03 03:52:56,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:56,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:52:56,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:56,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:52:56,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:56,107 INFO L87 Difference]: Start difference. First operand has 211 states, 191 states have (on average 1.6806282722513088) internal successors, (321), 202 states have internal predecessors, (321), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:56,394 INFO L93 Difference]: Finished difference Result 590 states and 1005 transitions. [2022-11-03 03:52:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:52:56,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 03:52:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:56,426 INFO L225 Difference]: With dead ends: 590 [2022-11-03 03:52:56,426 INFO L226 Difference]: Without dead ends: 377 [2022-11-03 03:52:56,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:56,439 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 211 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:56,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 571 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:52:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-03 03:52:56,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 208. [2022-11-03 03:52:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 199 states have internal predecessors, (250), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 03:52:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 282 transitions. [2022-11-03 03:52:56,507 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 282 transitions. Word has length 10 [2022-11-03 03:52:56,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:56,511 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 282 transitions. [2022-11-03 03:52:56,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:56,512 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 282 transitions. [2022-11-03 03:52:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 03:52:56,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:56,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:56,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:56,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:52:56,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1947342789, now seen corresponding path program 1 times [2022-11-03 03:52:56,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:56,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579883323] [2022-11-03 03:52:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:56,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:56,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:56,726 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:56,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:52:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:58,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 2037 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:52:58,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:59,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:59,003 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:59,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579883323] [2022-11-03 03:52:59,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579883323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:59,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:52:59,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:52:59,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820816959] [2022-11-03 03:52:59,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:59,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:52:59,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:59,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:52:59,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:52:59,008 INFO L87 Difference]: Start difference. First operand 208 states and 282 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:59,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:59,146 INFO L93 Difference]: Finished difference Result 422 states and 573 transitions. [2022-11-03 03:52:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:52:59,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-03 03:52:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:59,148 INFO L225 Difference]: With dead ends: 422 [2022-11-03 03:52:59,148 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 03:52:59,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:52:59,150 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 225 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:59,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 536 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:52:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 03:52:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2022-11-03 03:52:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 192 states have (on average 1.2760416666666667) internal successors, (245), 202 states have internal predecessors, (245), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 03:52:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2022-11-03 03:52:59,167 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 108 [2022-11-03 03:52:59,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:59,168 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2022-11-03 03:52:59,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2022-11-03 03:52:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 03:52:59,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:59,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:59,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:59,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:52:59,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:59,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:59,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2120497223, now seen corresponding path program 1 times [2022-11-03 03:52:59,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:59,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567562993] [2022-11-03 03:52:59,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:59,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:59,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:59,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:59,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:53:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:01,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:53:01,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:01,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:01,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:01,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567562993] [2022-11-03 03:53:01,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567562993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:01,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:01,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:53:01,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039672086] [2022-11-03 03:53:01,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:01,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:53:01,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:53:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:01,847 INFO L87 Difference]: Start difference. First operand 211 states and 277 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:02,454 INFO L93 Difference]: Finished difference Result 460 states and 597 transitions. [2022-11-03 03:53:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:53:02,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-03 03:53:02,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:02,467 INFO L225 Difference]: With dead ends: 460 [2022-11-03 03:53:02,468 INFO L226 Difference]: Without dead ends: 252 [2022-11-03 03:53:02,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:02,470 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 11 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:02,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:53:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-03 03:53:02,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-11-03 03:53:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 233 states have (on average 1.2446351931330473) internal successors, (290), 243 states have internal predecessors, (290), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 03:53:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 322 transitions. [2022-11-03 03:53:02,499 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 322 transitions. Word has length 108 [2022-11-03 03:53:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:02,500 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 322 transitions. [2022-11-03 03:53:02,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 322 transitions. [2022-11-03 03:53:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 03:53:02,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:02,504 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:02,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:02,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:02,705 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1107731226, now seen corresponding path program 1 times [2022-11-03 03:53:02,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:02,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112274969] [2022-11-03 03:53:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:02,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:02,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:02,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:02,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:53:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:04,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:53:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:04,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:04,695 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:04,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112274969] [2022-11-03 03:53:04,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112274969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:04,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:04,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:53:04,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985428261] [2022-11-03 03:53:04,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:04,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:53:04,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:04,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:53:04,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:53:04,698 INFO L87 Difference]: Start difference. First operand 252 states and 322 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:53:04,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:04,795 INFO L93 Difference]: Finished difference Result 463 states and 605 transitions. [2022-11-03 03:53:04,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:53:04,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 123 [2022-11-03 03:53:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:04,798 INFO L225 Difference]: With dead ends: 463 [2022-11-03 03:53:04,799 INFO L226 Difference]: Without dead ends: 255 [2022-11-03 03:53:04,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:53:04,801 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 2 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:04,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:53:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-03 03:53:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-11-03 03:53:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 235 states have (on average 1.2468085106382978) internal successors, (293), 246 states have internal predecessors, (293), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-03 03:53:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 327 transitions. [2022-11-03 03:53:04,825 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 327 transitions. Word has length 123 [2022-11-03 03:53:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:04,825 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 327 transitions. [2022-11-03 03:53:04,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:53:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 327 transitions. [2022-11-03 03:53:04,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 03:53:04,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:04,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:04,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:05,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:05,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:05,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash -815535364, now seen corresponding path program 1 times [2022-11-03 03:53:05,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:05,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244119164] [2022-11-03 03:53:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:05,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:05,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:05,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:05,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:53:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:06,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:06,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:53:06,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:53:07,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:07,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244119164] [2022-11-03 03:53:07,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244119164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:07,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2047654421] [2022-11-03 03:53:07,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:07,069 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:07,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:07,074 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:07,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 03:53:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:09,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:53:09,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:53:09,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:09,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2047654421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:09,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:53:09,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 03:53:09,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026067501] [2022-11-03 03:53:09,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:09,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:53:09,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:53:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:53:09,276 INFO L87 Difference]: Start difference. First operand 255 states and 327 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 03:53:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:09,423 INFO L93 Difference]: Finished difference Result 524 states and 685 transitions. [2022-11-03 03:53:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:53:09,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2022-11-03 03:53:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:09,426 INFO L225 Difference]: With dead ends: 524 [2022-11-03 03:53:09,426 INFO L226 Difference]: Without dead ends: 313 [2022-11-03 03:53:09,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:53:09,428 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 216 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:09,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 802 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:53:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-03 03:53:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 264. [2022-11-03 03:53:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 244 states have (on average 1.2172131147540983) internal successors, (297), 255 states have internal predecessors, (297), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-03 03:53:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 331 transitions. [2022-11-03 03:53:09,446 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 331 transitions. Word has length 125 [2022-11-03 03:53:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:09,447 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 331 transitions. [2022-11-03 03:53:09,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 03:53:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 331 transitions. [2022-11-03 03:53:09,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 03:53:09,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:09,450 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:09,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:09,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:09,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:09,866 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:09,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:09,866 INFO L85 PathProgramCache]: Analyzing trace with hash -743148806, now seen corresponding path program 1 times [2022-11-03 03:53:09,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:09,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53384040] [2022-11-03 03:53:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:09,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:09,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:09,869 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:09,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:53:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:11,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:11,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:53:11,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:53:12,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:12,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53384040] [2022-11-03 03:53:12,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53384040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:12,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [968645503] [2022-11-03 03:53:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:12,025 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:12,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:12,026 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:12,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 03:53:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:14,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:53:14,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:53:14,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:14,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [968645503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:14,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:53:14,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 03:53:14,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251982621] [2022-11-03 03:53:14,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:14,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:53:14,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:14,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:53:14,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:53:14,868 INFO L87 Difference]: Start difference. First operand 264 states and 331 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 03:53:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:16,089 INFO L93 Difference]: Finished difference Result 574 states and 727 transitions. [2022-11-03 03:53:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:53:16,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2022-11-03 03:53:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:16,100 INFO L225 Difference]: With dead ends: 574 [2022-11-03 03:53:16,100 INFO L226 Difference]: Without dead ends: 354 [2022-11-03 03:53:16,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:53:16,102 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 52 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:16,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 509 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 03:53:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-03 03:53:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-11-03 03:53:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 331 states have (on average 1.2145015105740182) internal successors, (402), 342 states have internal predecessors, (402), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (22), 10 states have call predecessors, (22), 19 states have call successors, (22) [2022-11-03 03:53:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 443 transitions. [2022-11-03 03:53:16,123 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 443 transitions. Word has length 125 [2022-11-03 03:53:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:16,124 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 443 transitions. [2022-11-03 03:53:16,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 03:53:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 443 transitions. [2022-11-03 03:53:16,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 03:53:16,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:16,127 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:16,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:16,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:16,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:16,541 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:16,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:16,541 INFO L85 PathProgramCache]: Analyzing trace with hash -73537509, now seen corresponding path program 1 times [2022-11-03 03:53:16,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:16,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998337824] [2022-11-03 03:53:16,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:16,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:16,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:16,550 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:16,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:53:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:18,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:18,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:53:18,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:53:18,472 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:18,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998337824] [2022-11-03 03:53:18,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998337824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:18,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825848225] [2022-11-03 03:53:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:18,473 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:18,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:18,474 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:18,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 03:53:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:20,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:53:20,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:53:20,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:20,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [825848225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:20,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:53:20,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 03:53:20,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723483281] [2022-11-03 03:53:20,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:20,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:53:20,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:20,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:53:20,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:53:20,788 INFO L87 Difference]: Start difference. First operand 354 states and 443 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:53:20,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:20,964 INFO L93 Difference]: Finished difference Result 577 states and 729 transitions. [2022-11-03 03:53:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:53:20,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 142 [2022-11-03 03:53:20,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:20,967 INFO L225 Difference]: With dead ends: 577 [2022-11-03 03:53:20,967 INFO L226 Difference]: Without dead ends: 330 [2022-11-03 03:53:20,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:53:20,969 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 203 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:20,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1111 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:53:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-03 03:53:20,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2022-11-03 03:53:20,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 307 states have (on average 1.1856677524429968) internal successors, (364), 318 states have internal predecessors, (364), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (22), 10 states have call predecessors, (22), 19 states have call successors, (22) [2022-11-03 03:53:20,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 405 transitions. [2022-11-03 03:53:20,988 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 405 transitions. Word has length 142 [2022-11-03 03:53:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:20,989 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 405 transitions. [2022-11-03 03:53:20,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:53:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 405 transitions. [2022-11-03 03:53:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 03:53:20,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:20,991 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:21,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:21,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:21,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:21,404 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:21,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:21,405 INFO L85 PathProgramCache]: Analyzing trace with hash 495602191, now seen corresponding path program 1 times [2022-11-03 03:53:21,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:21,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839960230] [2022-11-03 03:53:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:21,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:21,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:21,409 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:21,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:53:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:23,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:53:23,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:53:23,376 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:23,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839960230] [2022-11-03 03:53:23,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839960230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:23,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [692806374] [2022-11-03 03:53:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:23,377 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:23,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:23,388 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:23,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 03:53:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:26,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:26,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:53:26,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:53:26,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [692806374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:26,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407544858] [2022-11-03 03:53:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:26,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:26,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:26,550 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:26,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:53:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:28,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:53:28,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 03:53:28,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 03:53:29,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407544858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:29,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:53:29,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 12 [2022-11-03 03:53:29,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471328234] [2022-11-03 03:53:29,104 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:53:29,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:53:29,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:53:29,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:53:29,108 INFO L87 Difference]: Start difference. First operand 330 states and 405 transitions. Second operand has 12 states, 12 states have (on average 29.416666666666668) internal successors, (353), 12 states have internal predecessors, (353), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 03:53:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:30,990 INFO L93 Difference]: Finished difference Result 1011 states and 1282 transitions. [2022-11-03 03:53:30,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:53:30,994 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 29.416666666666668) internal successors, (353), 12 states have internal predecessors, (353), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 142 [2022-11-03 03:53:30,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:30,998 INFO L225 Difference]: With dead ends: 1011 [2022-11-03 03:53:30,998 INFO L226 Difference]: Without dead ends: 728 [2022-11-03 03:53:30,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 837 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:53:31,000 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 973 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 2731 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:31,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 2731 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 03:53:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-03 03:53:31,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2022-11-03 03:53:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 687 states have (on average 1.1892285298398835) internal successors, (817), 698 states have internal predecessors, (817), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (42), 25 states have call predecessors, (42), 34 states have call successors, (42) [2022-11-03 03:53:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 893 transitions. [2022-11-03 03:53:31,044 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 893 transitions. Word has length 142 [2022-11-03 03:53:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:31,044 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 893 transitions. [2022-11-03 03:53:31,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.416666666666668) internal successors, (353), 12 states have internal predecessors, (353), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 03:53:31,045 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 893 transitions. [2022-11-03 03:53:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-11-03 03:53:31,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:31,055 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:31,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:31,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:31,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:31,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:31,680 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:31,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1193945768, now seen corresponding path program 1 times [2022-11-03 03:53:31,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:31,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430014106] [2022-11-03 03:53:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:31,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:31,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:31,684 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:31,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:53:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:42,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:53:42,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 173 proven. 10 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-03 03:53:42,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 109 proven. 71 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2022-11-03 03:53:42,568 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:42,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430014106] [2022-11-03 03:53:42,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430014106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:42,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [313895384] [2022-11-03 03:53:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:42,569 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:42,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:42,577 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:42,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 03:53:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:53,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:53:53,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 173 proven. 10 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-03 03:53:54,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 109 proven. 71 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2022-11-03 03:53:54,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [313895384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936750081] [2022-11-03 03:53:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:54,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:54,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:54,156 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:54,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 03:54:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:03,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:54:03,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 202 proven. 3 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-11-03 03:54:03,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-03 03:54:04,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936750081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:04,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:04,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2022-11-03 03:54:04,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033079684] [2022-11-03 03:54:04,032 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:04,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 03:54:04,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:04,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 03:54:04,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:54:04,035 INFO L87 Difference]: Start difference. First operand 726 states and 893 transitions. Second operand has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:54:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:05,957 INFO L93 Difference]: Finished difference Result 1431 states and 1853 transitions. [2022-11-03 03:54:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 03:54:05,958 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 444 [2022-11-03 03:54:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:05,963 INFO L225 Difference]: With dead ends: 1431 [2022-11-03 03:54:05,964 INFO L226 Difference]: Without dead ends: 746 [2022-11-03 03:54:05,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2683 GetRequests, 2640 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 03:54:05,969 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 121 mSDsluCounter, 2924 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 3176 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:05,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 3176 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:54:05,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-03 03:54:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 738. [2022-11-03 03:54:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 699 states have (on average 1.1917024320457796) internal successors, (833), 710 states have internal predecessors, (833), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (42), 25 states have call predecessors, (42), 34 states have call successors, (42) [2022-11-03 03:54:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 909 transitions. [2022-11-03 03:54:06,045 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 909 transitions. Word has length 444 [2022-11-03 03:54:06,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:06,046 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 909 transitions. [2022-11-03 03:54:06,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:54:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 909 transitions. [2022-11-03 03:54:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-11-03 03:54:06,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:06,060 INFO L195 NwaCegarLoop]: trace histogram [36, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:06,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:06,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:06,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:06,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:06,689 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:06,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1605218728, now seen corresponding path program 2 times [2022-11-03 03:54:06,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:06,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049282366] [2022-11-03 03:54:06,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:54:06,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:06,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:06,695 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:06,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:54:17,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:54:17,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:17,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:54:17,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 437 proven. 55 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-03 03:54:17,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 109 proven. 380 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2022-11-03 03:54:18,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:18,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049282366] [2022-11-03 03:54:18,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049282366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:18,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [183757935] [2022-11-03 03:54:18,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:54:18,665 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:18,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:18,666 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:18,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 03:54:31,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:54:31,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:31,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:54:31,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 437 proven. 55 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-03 03:54:31,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 109 proven. 380 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2022-11-03 03:54:31,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [183757935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:31,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378008997] [2022-11-03 03:54:31,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:54:31,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:31,892 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:31,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 03:54:42,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:54:42,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:42,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:54:42,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2022-11-03 03:54:43,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2022-11-03 03:54:45,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378008997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:45,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:45,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 7, 7] total 36 [2022-11-03 03:54:45,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767539310] [2022-11-03 03:54:45,521 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:45,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:54:45,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:45,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:54:45,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 03:54:45,526 INFO L87 Difference]: Start difference. First operand 738 states and 909 transitions. Second operand has 36 states, 36 states have (on average 27.77777777777778) internal successors, (1000), 36 states have internal predecessors, (1000), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 03:55:06,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:55:06,241 INFO L93 Difference]: Finished difference Result 2486 states and 3329 transitions. [2022-11-03 03:55:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 03:55:06,242 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 27.77777777777778) internal successors, (1000), 36 states have internal predecessors, (1000), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 468 [2022-11-03 03:55:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:55:06,250 INFO L225 Difference]: With dead ends: 2486 [2022-11-03 03:55:06,250 INFO L226 Difference]: Without dead ends: 1791 [2022-11-03 03:55:06,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2841 GetRequests, 2772 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1091, Invalid=3879, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 03:55:06,254 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 2936 mSDsluCounter, 17122 mSDsCounter, 0 mSdLazyCounter, 4965 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3088 SdHoareTripleChecker+Valid, 18146 SdHoareTripleChecker+Invalid, 5930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 4965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:55:06,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3088 Valid, 18146 Invalid, 5930 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [965 Valid, 4965 Invalid, 0 Unknown, 0 Unchecked, 16.9s Time] [2022-11-03 03:55:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2022-11-03 03:55:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1773. [2022-11-03 03:55:06,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1698 states have (on average 1.17962308598351) internal successors, (2003), 1709 states have internal predecessors, (2003), 70 states have call successors, (70), 3 states have call predecessors, (70), 4 states have return successors, (90), 61 states have call predecessors, (90), 70 states have call successors, (90) [2022-11-03 03:55:06,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2163 transitions. [2022-11-03 03:55:06,351 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2163 transitions. Word has length 468 [2022-11-03 03:55:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:55:06,351 INFO L495 AbstractCegarLoop]: Abstraction has 1773 states and 2163 transitions. [2022-11-03 03:55:06,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 27.77777777777778) internal successors, (1000), 36 states have internal predecessors, (1000), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 03:55:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2163 transitions. [2022-11-03 03:55:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1087 [2022-11-03 03:55:06,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:06,369 INFO L195 NwaCegarLoop]: trace histogram [66, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:55:06,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:06,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:06,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:55:06,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:55:06,970 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:55:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1111616016, now seen corresponding path program 3 times [2022-11-03 03:55:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:55:06,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434503816] [2022-11-03 03:55:06,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:55:06,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:55:06,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:55:06,976 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:55:06,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f4836ff-de18-46de-a6cf-fe779c5c2921/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process