./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/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_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/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_ef64201f-e58f-4081-a518-a06457d23943/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 c7b5cea41c34641368705a00e3051c009f6877551b3530b7d4fceaf386f5f58c --- 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 01:37:06,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:37:06,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:37:06,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:37:06,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:37:06,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:37:06,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:37:06,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:37:06,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:37:06,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:37:06,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:37:06,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:37:06,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:37:06,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:37:06,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:37:06,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:37:06,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:37:06,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:37:06,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:37:06,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:37:06,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:37:06,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:37:06,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:37:06,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:37:07,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:37:07,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:37:07,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:37:07,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:37:07,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:37:07,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:37:07,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:37:07,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:37:07,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:37:07,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:37:07,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:37:07,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:37:07,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:37:07,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:37:07,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:37:07,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:37:07,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:37:07,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:37:07,064 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:37:07,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:37:07,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:37:07,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:37:07,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:37:07,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:37:07,067 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:37:07,067 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:37:07,067 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:37:07,068 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:37:07,069 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:37:07,069 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:37:07,069 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:37:07,069 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:37:07,070 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:37:07,070 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:37:07,070 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:37:07,070 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:37:07,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:37:07,071 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:37:07,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:37:07,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:37:07,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:37:07,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:37:07,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:37:07,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:37:07,073 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:37:07,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:37:07,073 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:37:07,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:37:07,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:37:07,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:37:07,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:37:07,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:37:07,075 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:37:07,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:37:07,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:37:07,076 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:37:07,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:37:07,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:37:07,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:37:07,077 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_ef64201f-e58f-4081-a518-a06457d23943/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7b5cea41c34641368705a00e3051c009f6877551b3530b7d4fceaf386f5f58c [2022-11-03 01:37:07,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:37:07,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:37:07,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:37:07,382 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:37:07,383 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:37:07,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i [2022-11-03 01:37:07,462 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/data/a53723359/7d47185c946f49a8a86e8d49dd271195/FLAGfaace15c3 [2022-11-03 01:37:08,089 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:37:08,090 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i [2022-11-03 01:37:08,108 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/data/a53723359/7d47185c946f49a8a86e8d49dd271195/FLAGfaace15c3 [2022-11-03 01:37:08,308 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/data/a53723359/7d47185c946f49a8a86e8d49dd271195 [2022-11-03 01:37:08,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:37:08,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:37:08,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:37:08,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:37:08,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:37:08,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:37:08" (1/1) ... [2022-11-03 01:37:08,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18492b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:08, skipping insertion in model container [2022-11-03 01:37:08,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:37:08" (1/1) ... [2022-11-03 01:37:08,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:37:08,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:37:08,916 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_ef64201f-e58f-4081-a518-a06457d23943/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[33021,33034] [2022-11-03 01:37:09,084 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_ef64201f-e58f-4081-a518-a06457d23943/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[49681,49694] [2022-11-03 01:37:09,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:37:09,106 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:37:09,169 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_ef64201f-e58f-4081-a518-a06457d23943/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[33021,33034] [2022-11-03 01:37:09,302 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_ef64201f-e58f-4081-a518-a06457d23943/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[49681,49694] [2022-11-03 01:37:09,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:37:09,366 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:37:09,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09 WrapperNode [2022-11-03 01:37:09,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:37:09,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:37:09,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:37:09,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:37:09,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09" (1/1) ... [2022-11-03 01:37:09,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09" (1/1) ... [2022-11-03 01:37:09,506 INFO L138 Inliner]: procedures = 177, calls = 388, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1402 [2022-11-03 01:37:09,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:37:09,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:37:09,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:37:09,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:37:09,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09" (1/1) ... [2022-11-03 01:37:09,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09" (1/1) ... [2022-11-03 01:37:09,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09" (1/1) ... [2022-11-03 01:37:09,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09" (1/1) ... [2022-11-03 01:37:09,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09" (1/1) ... [2022-11-03 01:37:09,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09" (1/1) ... [2022-11-03 01:37:09,628 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09" (1/1) ... [2022-11-03 01:37:09,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09" (1/1) ... [2022-11-03 01:37:09,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:37:09,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:37:09,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:37:09,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:37:09,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09" (1/1) ... [2022-11-03 01:37:09,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:37:09,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:37:09,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:37:09,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:37:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:37:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:37:09,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:37:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:37:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 01:37:09,778 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 01:37:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:37:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:37:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:37:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:37:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 01:37:09,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:37:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:37:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:37:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:37:09,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:37:10,076 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:37:10,092 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:37:12,349 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:37:12,876 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:37:12,877 INFO L300 CfgBuilder]: Removed 83 assume(true) statements. [2022-11-03 01:37:12,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:37:12 BoogieIcfgContainer [2022-11-03 01:37:12,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:37:12,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:37:12,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:37:12,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:37:12,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:37:08" (1/3) ... [2022-11-03 01:37:12,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c53bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:37:12, skipping insertion in model container [2022-11-03 01:37:12,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:37:09" (2/3) ... [2022-11-03 01:37:12,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c53bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:37:12, skipping insertion in model container [2022-11-03 01:37:12,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:37:12" (3/3) ... [2022-11-03 01:37:12,892 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test5-1.i [2022-11-03 01:37:12,912 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:37:12,912 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 01:37:12,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:37:12,997 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;@2210d2ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:37:12,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 01:37:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 151 states, 135 states have (on average 1.8148148148148149) internal successors, (245), 142 states have internal predecessors, (245), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:37:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:37:13,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:37:13,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 01:37:13,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:37:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:37:13,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1544350828, now seen corresponding path program 1 times [2022-11-03 01:37:13,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:37:13,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276823178] [2022-11-03 01:37:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:13,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:37:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:37:13,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:37:13,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276823178] [2022-11-03 01:37:13,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 01:37:13,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820508681] [2022-11-03 01:37:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:13,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:13,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:37:13,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:37:13,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:37:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:37:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 01:37:13,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:37:13,463 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 01:37:13,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:37:13,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820508681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:37:13,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:37:13,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:37:13,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677447937] [2022-11-03 01:37:13,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:37:13,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:37:13,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:37:13,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:37:13,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:37:13,519 INFO L87 Difference]: Start difference. First operand has 151 states, 135 states have (on average 1.8148148148148149) internal successors, (245), 142 states have internal predecessors, (245), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:14,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:37:14,705 INFO L93 Difference]: Finished difference Result 301 states and 538 transitions. [2022-11-03 01:37:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:37:14,712 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 01:37:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:37:14,720 INFO L225 Difference]: With dead ends: 301 [2022-11-03 01:37:14,720 INFO L226 Difference]: Without dead ends: 150 [2022-11-03 01:37:14,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:37:14,727 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:37:14,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:37:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-03 01:37:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-11-03 01:37:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 141 states have internal predecessors, (161), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:37:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2022-11-03 01:37:14,796 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 6 [2022-11-03 01:37:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:37:14,796 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2022-11-03 01:37:14,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2022-11-03 01:37:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:37:14,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:37:14,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:37:14,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 01:37:15,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 01:37:15,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:37:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:37:15,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1453104004, now seen corresponding path program 1 times [2022-11-03 01:37:15,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:37:15,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873911510] [2022-11-03 01:37:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:15,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:37:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:37:15,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:37:15,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873911510] [2022-11-03 01:37:15,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 01:37:15,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882205023] [2022-11-03 01:37:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:15,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:15,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:37:15,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:37:15,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:37:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:37:15,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:37:15,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:37:15,411 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 01:37:15,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:37:15,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882205023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:37:15,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:37:15,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:37:15,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521599752] [2022-11-03 01:37:15,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:37:15,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:37:15,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:37:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:37:15,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:37:15,414 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:18,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:37:18,792 INFO L93 Difference]: Finished difference Result 342 states and 425 transitions. [2022-11-03 01:37:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:37:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 01:37:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:37:18,806 INFO L225 Difference]: With dead ends: 342 [2022-11-03 01:37:18,806 INFO L226 Difference]: Without dead ends: 290 [2022-11-03 01:37:18,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 01:37:18,808 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 149 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:37:18,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 342 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 01:37:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-03 01:37:18,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 151. [2022-11-03 01:37:18,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 142 states have internal predecessors, (162), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:37:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 184 transitions. [2022-11-03 01:37:18,825 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 184 transitions. Word has length 17 [2022-11-03 01:37:18,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:37:18,826 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 184 transitions. [2022-11-03 01:37:18,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 184 transitions. [2022-11-03 01:37:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 01:37:18,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:37:18,828 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] [2022-11-03 01:37:18,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:37:19,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:19,051 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:37:19,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:37:19,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1038732643, now seen corresponding path program 1 times [2022-11-03 01:37:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:37:19,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453558274] [2022-11-03 01:37:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:19,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:37:19,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:37:19,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15244418] [2022-11-03 01:37:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:19,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:19,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:37:19,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:37:19,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:37:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:37:20,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 3112 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:37:20,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:37:20,821 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 01:37:20,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:37:20,907 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 01:37:20,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:37:20,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453558274] [2022-11-03 01:37:20,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:37:20,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15244418] [2022-11-03 01:37:20,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15244418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:37:20,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1728759234] [2022-11-03 01:37:20,927 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-03 01:37:20,928 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:37:20,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:37:20,936 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:37:20,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:37:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:21,067 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:37:21,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 01:37:21,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:21,083 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 01:37:21,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:21,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:21,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:21,165 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 01:37:21,166 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 01:37:21,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:21,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:21,222 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 01:37:21,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 01:37:21,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:21,260 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 01:37:21,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:21,284 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 01:37:21,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:21,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:21,336 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:37:21,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:37:21,724 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 01:37:21,754 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 01:37:21,828 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 01:37:21,836 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 01:37:21,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:37:22,173 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 01:37:22,186 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 01:37:22,198 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 01:37:22,206 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 01:37:22,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:37:22,245 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:37:23,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1728759234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:37:23,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:37:23,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3] total 11 [2022-11-03 01:37:23,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109206891] [2022-11-03 01:37:23,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:37:23,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:37:23,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:37:23,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:37:23,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:37:23,400 INFO L87 Difference]: Start difference. First operand 151 states and 184 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:37:28,913 INFO L93 Difference]: Finished difference Result 319 states and 389 transitions. [2022-11-03 01:37:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:37:28,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-03 01:37:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:37:28,915 INFO L225 Difference]: With dead ends: 319 [2022-11-03 01:37:28,915 INFO L226 Difference]: Without dead ends: 170 [2022-11-03 01:37:28,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:37:28,916 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 13 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:37:28,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 509 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 01:37:28,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-03 01:37:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2022-11-03 01:37:28,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 146 states have (on average 1.178082191780822) internal successors, (172), 152 states have internal predecessors, (172), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:37:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 194 transitions. [2022-11-03 01:37:28,953 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 194 transitions. Word has length 61 [2022-11-03 01:37:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:37:28,956 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 194 transitions. [2022-11-03 01:37:28,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:37:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 194 transitions. [2022-11-03 01:37:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 01:37:28,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:37:28,959 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:37:28,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-03 01:37:29,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-03 01:37:29,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:37:29,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:37:29,164 INFO L85 PathProgramCache]: Analyzing trace with hash 216369794, now seen corresponding path program 1 times [2022-11-03 01:37:29,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:37:29,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27841514] [2022-11-03 01:37:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:29,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:37:29,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:37:29,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172091154] [2022-11-03 01:37:29,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:29,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:29,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:37:29,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:37:29,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:37:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:37:30,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 2249 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:37:30,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:37:30,579 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 01:37:30,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:37:30,698 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 01:37:30,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:37:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27841514] [2022-11-03 01:37:30,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:37:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172091154] [2022-11-03 01:37:30,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172091154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:37:30,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856054795] [2022-11-03 01:37:30,706 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-03 01:37:30,707 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:37:30,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:37:30,709 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:37:30,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:37:30,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:30,818 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 01:37:30,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 01:37:30,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:30,848 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:37:30,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 01:37:30,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:30,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:30,952 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 01:37:30,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 01:37:30,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:30,970 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 01:37:30,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:30,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:31,016 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:37:31,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:37:31,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:31,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:31,033 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 01:37:31,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:31,056 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 01:37:31,297 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 01:37:31,310 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 01:37:31,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 01:37:31,329 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 01:37:31,356 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 01:37:31,367 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:37:31,367 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 1 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 01:37:31,377 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 01:37:31,389 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 01:37:31,448 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 01:37:31,471 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 01:37:31,487 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 01:37:31,498 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 01:37:31,517 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 01:37:31,961 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 01:37:31,977 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 01:37:31,991 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 01:37:31,999 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 01:37:32,020 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 01:37:32,034 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 01:37:32,048 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 01:37:32,058 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 01:37:32,090 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 01:37:32,104 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 01:37:32,124 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 01:37:32,151 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 01:37:32,161 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 01:37:32,275 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 78 for LOIs [2022-11-03 01:37:32,312 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:37:33,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1856054795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:37:33,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:37:33,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [4, 4] total 17 [2022-11-03 01:37:33,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374493358] [2022-11-03 01:37:33,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:37:33,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:37:33,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:37:33,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:37:33,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:37:33,942 INFO L87 Difference]: Start difference. First operand 161 states and 194 transitions. Second operand has 13 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:37:40,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 01:37:42,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 01:37:44,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 01:37:45,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 01:37:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:37:45,831 INFO L93 Difference]: Finished difference Result 321 states and 391 transitions. [2022-11-03 01:37:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:37:45,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-11-03 01:37:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:37:45,833 INFO L225 Difference]: With dead ends: 321 [2022-11-03 01:37:45,833 INFO L226 Difference]: Without dead ends: 172 [2022-11-03 01:37:45,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:37:45,835 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 11 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:37:45,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 705 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 263 Invalid, 0 Unknown, 186 Unchecked, 9.8s Time] [2022-11-03 01:37:45,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-03 01:37:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 166. [2022-11-03 01:37:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 150 states have (on average 1.1733333333333333) internal successors, (176), 156 states have internal predecessors, (176), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 01:37:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2022-11-03 01:37:45,854 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 74 [2022-11-03 01:37:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:37:45,855 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2022-11-03 01:37:45,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:37:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2022-11-03 01:37:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:37:45,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:37:45,858 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:37:45,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:37:46,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:46,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:37:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:37:46,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2126701724, now seen corresponding path program 1 times [2022-11-03 01:37:46,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:37:46,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875274554] [2022-11-03 01:37:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:46,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:37:46,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:37:46,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260052547] [2022-11-03 01:37:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:37:46,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:46,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:37:46,254 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:37:46,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:37:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:37:47,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 2264 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:37:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:37:47,662 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 01:37:47,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:37:47,774 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 01:37:47,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:37:47,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875274554] [2022-11-03 01:37:47,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:37:47,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260052547] [2022-11-03 01:37:47,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260052547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:37:47,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1576305741] [2022-11-03 01:37:47,778 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-03 01:37:47,779 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:37:47,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:37:47,779 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:37:47,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:37:47,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:47,863 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 01:37:47,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 01:37:47,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:47,873 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 01:37:47,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:47,898 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 01:37:47,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:47,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:47,934 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 01:37:47,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-03 01:37:47,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:47,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:37:47,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:47,966 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 01:37:47,966 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 01:37:47,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:47,986 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 01:37:47,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:47,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:37:48,035 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:37:48,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:37:48,310 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 01:37:48,321 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 01:37:48,328 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 01:37:48,343 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 01:37:48,363 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 01:37:48,373 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 01:37:48,388 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 0 case distinctions, treesize of input 43 treesize of output 34 [2022-11-03 01:37:48,413 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 01:37:48,430 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 01:37:48,449 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 01:37:48,467 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 01:37:48,478 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 01:37:48,527 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 01:37:48,531 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 01:37:48,536 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 01:37:48,552 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 01:37:48,558 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 01:37:48,566 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 01:37:48,583 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 01:37:48,588 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 01:37:48,593 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 01:37:48,637 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:37:48,638 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 01:37:48,653 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:37:48,653 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 01:37:48,672 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:37:48,673 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 01:37:48,747 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:37:48,747 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 01:37:48,767 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:37:48,767 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 01:37:48,781 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:37:48,782 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 01:37:57,653 WARN L234 SmtUtils]: Spent 8.78s 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 01:37:57,654 INFO L356 Elim1Store]: treesize reduction 340, result has 16.0 percent of original size [2022-11-03 01:37:57,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:37:57,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:37:57,855 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_512| 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 01:37:57,858 INFO L158 Benchmark]: Toolchain (without parser) took 49543.50ms. Allocated memory was 115.3MB in the beginning and 320.9MB in the end (delta: 205.5MB). Free memory was 72.8MB in the beginning and 63.4MB in the end (delta: 9.3MB). Peak memory consumption was 214.0MB. Max. memory is 16.1GB. [2022-11-03 01:37:57,859 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 115.3MB. Free memory is still 92.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:37:57,859 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1049.39ms. Allocated memory is still 115.3MB. Free memory was 72.6MB in the beginning and 62.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 01:37:57,859 INFO L158 Benchmark]: Boogie Procedure Inliner took 138.96ms. Allocated memory is still 115.3MB. Free memory was 62.1MB in the beginning and 51.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 01:37:57,860 INFO L158 Benchmark]: Boogie Preprocessor took 136.85ms. Allocated memory is still 115.3MB. Free memory was 51.6MB in the beginning and 82.9MB in the end (delta: -31.2MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. [2022-11-03 01:37:57,860 INFO L158 Benchmark]: RCFGBuilder took 3235.37ms. Allocated memory was 115.3MB in the beginning and 195.0MB in the end (delta: 79.7MB). Free memory was 82.9MB in the beginning and 127.8MB in the end (delta: -44.9MB). Peak memory consumption was 89.1MB. Max. memory is 16.1GB. [2022-11-03 01:37:57,860 INFO L158 Benchmark]: TraceAbstraction took 44975.29ms. Allocated memory was 195.0MB in the beginning and 320.9MB in the end (delta: 125.8MB). Free memory was 126.7MB in the beginning and 63.4MB in the end (delta: 63.3MB). Peak memory consumption was 188.4MB. Max. memory is 16.1GB. [2022-11-03 01:37:57,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 115.3MB. Free memory is still 92.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1049.39ms. Allocated memory is still 115.3MB. Free memory was 72.6MB in the beginning and 62.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 138.96ms. Allocated memory is still 115.3MB. Free memory was 62.1MB in the beginning and 51.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 136.85ms. Allocated memory is still 115.3MB. Free memory was 51.6MB in the beginning and 82.9MB in the end (delta: -31.2MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. * RCFGBuilder took 3235.37ms. Allocated memory was 115.3MB in the beginning and 195.0MB in the end (delta: 79.7MB). Free memory was 82.9MB in the beginning and 127.8MB in the end (delta: -44.9MB). Peak memory consumption was 89.1MB. Max. memory is 16.1GB. * TraceAbstraction took 44975.29ms. Allocated memory was 195.0MB in the beginning and 320.9MB in the end (delta: 125.8MB). Free memory was 126.7MB in the beginning and 63.4MB in the end (delta: 63.3MB). Peak memory consumption was 188.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_512| input size 141 context size 141 output size 141 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_512| 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 01:37:57,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/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_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/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_ef64201f-e58f-4081-a518-a06457d23943/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 c7b5cea41c34641368705a00e3051c009f6877551b3530b7d4fceaf386f5f58c --- 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 01:38:00,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:38:00,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:38:00,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:38:00,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:38:00,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:38:00,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:38:00,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:38:00,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:38:00,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:38:00,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:38:00,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:38:00,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:38:00,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:38:00,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:38:00,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:38:00,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:38:00,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:38:00,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:38:00,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:38:00,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:38:00,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:38:00,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:38:00,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:38:00,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:38:00,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:38:00,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:38:00,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:38:00,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:38:00,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:38:00,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:38:00,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:38:00,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:38:00,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:38:00,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:38:00,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:38:00,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:38:00,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:38:00,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:38:00,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:38:00,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:38:00,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 01:38:00,324 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:38:00,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:38:00,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:38:00,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:38:00,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:38:00,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:38:00,327 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:38:00,328 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:38:00,328 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:38:00,328 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:38:00,328 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:38:00,329 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:38:00,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:38:00,330 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:38:00,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:38:00,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:38:00,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:38:00,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:38:00,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:38:00,331 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:38:00,331 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:38:00,332 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:38:00,332 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:38:00,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:38:00,332 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:38:00,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:38:00,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:38:00,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:38:00,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:38:00,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:38:00,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:38:00,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:38:00,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:38:00,335 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:38:00,335 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:38:00,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:38:00,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:38:00,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:38:00,336 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_ef64201f-e58f-4081-a518-a06457d23943/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7b5cea41c34641368705a00e3051c009f6877551b3530b7d4fceaf386f5f58c [2022-11-03 01:38:00,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:38:00,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:38:00,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:38:00,725 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:38:00,727 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:38:00,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i [2022-11-03 01:38:00,799 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/data/4de9738de/d34bb867950c4ee9b1c2e24ee6ad9ab7/FLAGc7763b5e8 [2022-11-03 01:38:01,425 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:38:01,425 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i [2022-11-03 01:38:01,441 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/data/4de9738de/d34bb867950c4ee9b1c2e24ee6ad9ab7/FLAGc7763b5e8 [2022-11-03 01:38:01,654 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/data/4de9738de/d34bb867950c4ee9b1c2e24ee6ad9ab7 [2022-11-03 01:38:01,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:38:01,660 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:38:01,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:38:01,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:38:01,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:38:01,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:38:01" (1/1) ... [2022-11-03 01:38:01,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dd26858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:01, skipping insertion in model container [2022-11-03 01:38:01,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:38:01" (1/1) ... [2022-11-03 01:38:01,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:38:01,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:38:02,228 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_ef64201f-e58f-4081-a518-a06457d23943/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[33021,33034] [2022-11-03 01:38:02,453 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_ef64201f-e58f-4081-a518-a06457d23943/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[49681,49694] [2022-11-03 01:38:02,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:38:02,473 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 01:38:02,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:38:02,509 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_ef64201f-e58f-4081-a518-a06457d23943/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[33021,33034] [2022-11-03 01:38:02,575 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_ef64201f-e58f-4081-a518-a06457d23943/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[49681,49694] [2022-11-03 01:38:02,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:38:02,583 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:38:02,610 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_ef64201f-e58f-4081-a518-a06457d23943/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[33021,33034] [2022-11-03 01:38:02,715 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_ef64201f-e58f-4081-a518-a06457d23943/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-1.i[49681,49694] [2022-11-03 01:38:02,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:38:02,789 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:38:02,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02 WrapperNode [2022-11-03 01:38:02,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:38:02,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:38:02,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:38:02,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:38:02,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02" (1/1) ... [2022-11-03 01:38:02,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02" (1/1) ... [2022-11-03 01:38:02,929 INFO L138 Inliner]: procedures = 180, calls = 388, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1402 [2022-11-03 01:38:02,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:38:02,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:38:02,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:38:02,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:38:02,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02" (1/1) ... [2022-11-03 01:38:02,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02" (1/1) ... [2022-11-03 01:38:02,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02" (1/1) ... [2022-11-03 01:38:02,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02" (1/1) ... [2022-11-03 01:38:03,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02" (1/1) ... [2022-11-03 01:38:03,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02" (1/1) ... [2022-11-03 01:38:03,108 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02" (1/1) ... [2022-11-03 01:38:03,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02" (1/1) ... [2022-11-03 01:38:03,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:38:03,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:38:03,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:38:03,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:38:03,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02" (1/1) ... [2022-11-03 01:38:03,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:38:03,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:03,188 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:38:03,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:38:03,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 01:38:03,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 01:38:03,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:38:03,236 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:38:03,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 01:38:03,236 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 01:38:03,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:38:03,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:38:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:38:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:38:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 01:38:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:38:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:38:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 01:38:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 01:38:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:38:03,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:38:03,604 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:38:03,607 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:38:14,207 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:38:14,225 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:38:14,228 INFO L300 CfgBuilder]: Removed 83 assume(true) statements. [2022-11-03 01:38:14,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:38:14 BoogieIcfgContainer [2022-11-03 01:38:14,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:38:14,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:38:14,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:38:14,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:38:14,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:38:01" (1/3) ... [2022-11-03 01:38:14,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18cd7dbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:38:14, skipping insertion in model container [2022-11-03 01:38:14,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:02" (2/3) ... [2022-11-03 01:38:14,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18cd7dbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:38:14, skipping insertion in model container [2022-11-03 01:38:14,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:38:14" (3/3) ... [2022-11-03 01:38:14,243 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test5-1.i [2022-11-03 01:38:14,262 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:38:14,262 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 01:38:14,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:38:14,340 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;@704fc401, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:38:14,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 01:38:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 249 states have internal predecessors, (411), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:38:14,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:38:14,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:14,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:14,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:14,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:14,365 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2022-11-03 01:38:14,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:38:14,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935141242] [2022-11-03 01:38:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:14,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:38:14,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:38:14,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:38:14,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:38:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:14,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 01:38:14,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:14,681 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 01:38:14,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:14,682 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:38:14,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935141242] [2022-11-03 01:38:14,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935141242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:14,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:38:14,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:38:14,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790022381] [2022-11-03 01:38:14,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:14,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:38:14,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:38:14,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:38:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:38:14,728 INFO L87 Difference]: Start difference. First operand has 258 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 249 states have internal predecessors, (411), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:14,784 INFO L93 Difference]: Finished difference Result 514 states and 869 transitions. [2022-11-03 01:38:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:38:14,786 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:38:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:14,797 INFO L225 Difference]: With dead ends: 514 [2022-11-03 01:38:14,798 INFO L226 Difference]: Without dead ends: 254 [2022-11-03 01:38:14,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:38:14,805 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:14,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:38:14,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-03 01:38:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-11-03 01:38:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:38:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2022-11-03 01:38:14,864 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2022-11-03 01:38:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:14,865 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2022-11-03 01:38:14,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:14,865 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2022-11-03 01:38:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 01:38:14,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:14,867 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] [2022-11-03 01:38:14,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:15,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:38:15,084 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:15,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:15,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2022-11-03 01:38:15,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:38:15,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022656516] [2022-11-03 01:38:15,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:15,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:38:15,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:38:15,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:38:15,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:38:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:15,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:38:15,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:15,455 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 01:38:15,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:15,455 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:38:15,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022656516] [2022-11-03 01:38:15,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022656516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:15,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:38:15,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:38:15,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141534465] [2022-11-03 01:38:15,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:15,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:38:15,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:38:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:38:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:38:15,460 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:15,849 INFO L93 Difference]: Finished difference Result 573 states and 768 transitions. [2022-11-03 01:38:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:38:15,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 01:38:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:15,857 INFO L225 Difference]: With dead ends: 573 [2022-11-03 01:38:15,857 INFO L226 Difference]: Without dead ends: 495 [2022-11-03 01:38:15,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 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 01:38:15,859 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 300 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:15,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 704 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:38:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-03 01:38:15,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 255. [2022-11-03 01:38:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 240 states have (on average 1.3166666666666667) internal successors, (316), 246 states have internal predecessors, (316), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:38:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 338 transitions. [2022-11-03 01:38:15,885 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 338 transitions. Word has length 42 [2022-11-03 01:38:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:15,885 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 338 transitions. [2022-11-03 01:38:15,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 338 transitions. [2022-11-03 01:38:15,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 01:38:15,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:15,890 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:15,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:16,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:38:16,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:16,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1488765968, now seen corresponding path program 1 times [2022-11-03 01:38:16,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:38:16,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562392736] [2022-11-03 01:38:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:16,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:38:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:38:16,110 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:38:16,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:38:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:18,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:38:18,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:18,500 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 01:38:18,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:18,501 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:38:18,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562392736] [2022-11-03 01:38:18,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562392736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:18,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:38:18,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:38:18,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253998785] [2022-11-03 01:38:18,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:18,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:38:18,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:38:18,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:38:18,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:38:18,504 INFO L87 Difference]: Start difference. First operand 255 states and 338 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:18,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:18,644 INFO L93 Difference]: Finished difference Result 516 states and 685 transitions. [2022-11-03 01:38:18,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:38:18,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-11-03 01:38:18,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:18,647 INFO L225 Difference]: With dead ends: 516 [2022-11-03 01:38:18,647 INFO L226 Difference]: Without dead ends: 264 [2022-11-03 01:38:18,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 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 01:38:18,650 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 643 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 01:38:18,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 643 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:38:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-03 01:38:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2022-11-03 01:38:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 243 states have (on average 1.2798353909465021) internal successors, (311), 249 states have internal predecessors, (311), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:38:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 333 transitions. [2022-11-03 01:38:18,679 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 333 transitions. Word has length 140 [2022-11-03 01:38:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:18,679 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 333 transitions. [2022-11-03 01:38:18,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 333 transitions. [2022-11-03 01:38:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 01:38:18,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:18,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:18,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:18,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:38:18,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1835639812, now seen corresponding path program 1 times [2022-11-03 01:38:18,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:38:18,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151416221] [2022-11-03 01:38:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:18,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:38:18,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:38:18,887 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:38:18,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:38:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:21,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 2098 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:38:21,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:21,341 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 01:38:21,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:21,341 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:38:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151416221] [2022-11-03 01:38:21,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151416221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:21,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:38:21,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:38:21,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771209175] [2022-11-03 01:38:21,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:21,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:38:21,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:38:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:38:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:38:21,349 INFO L87 Difference]: Start difference. First operand 258 states and 333 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:21,710 INFO L93 Difference]: Finished difference Result 554 states and 709 transitions. [2022-11-03 01:38:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:38:21,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-11-03 01:38:21,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:21,722 INFO L225 Difference]: With dead ends: 554 [2022-11-03 01:38:21,722 INFO L226 Difference]: Without dead ends: 299 [2022-11-03 01:38:21,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 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 01:38:21,724 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 11 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:21,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 635 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:38:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-03 01:38:21,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-11-03 01:38:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 284 states have (on average 1.2535211267605635) internal successors, (356), 290 states have internal predecessors, (356), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:38:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 378 transitions. [2022-11-03 01:38:21,746 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 378 transitions. Word has length 140 [2022-11-03 01:38:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:21,747 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 378 transitions. [2022-11-03 01:38:21,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 378 transitions. [2022-11-03 01:38:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:38:21,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:21,751 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:21,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-03 01:38:21,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:38:21,975 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:21,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1891908699, now seen corresponding path program 1 times [2022-11-03 01:38:21,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:38:21,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17096814] [2022-11-03 01:38:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:21,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:38:21,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:38:21,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:38:22,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:38:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:23,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:38:23,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:23,850 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 01:38:23,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:23,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:38:23,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17096814] [2022-11-03 01:38:23,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17096814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:23,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:38:23,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:38:23,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93332058] [2022-11-03 01:38:23,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:23,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:38:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:38:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:38:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:38:23,854 INFO L87 Difference]: Start difference. First operand 299 states and 378 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:38:23,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:23,953 INFO L93 Difference]: Finished difference Result 557 states and 717 transitions. [2022-11-03 01:38:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:38:23,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 155 [2022-11-03 01:38:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:23,956 INFO L225 Difference]: With dead ends: 557 [2022-11-03 01:38:23,957 INFO L226 Difference]: Without dead ends: 302 [2022-11-03 01:38:23,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 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 01:38:23,958 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 2 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 959 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 01:38:23,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 959 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:38:23,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-03 01:38:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2022-11-03 01:38:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 286 states have (on average 1.2552447552447552) internal successors, (359), 293 states have internal predecessors, (359), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 01:38:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 383 transitions. [2022-11-03 01:38:23,975 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 383 transitions. Word has length 155 [2022-11-03 01:38:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:23,975 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 383 transitions. [2022-11-03 01:38:23,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:38:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 383 transitions. [2022-11-03 01:38:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-03 01:38:23,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:23,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:24,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:24,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:38:24,199 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:24,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:24,200 INFO L85 PathProgramCache]: Analyzing trace with hash 541073415, now seen corresponding path program 1 times [2022-11-03 01:38:24,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:38:24,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888627636] [2022-11-03 01:38:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:24,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:38:24,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:38:24,204 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:38:24,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:38:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:26,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:38:26,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:26,159 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 01:38:26,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:26,301 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 01:38:26,301 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:38:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888627636] [2022-11-03 01:38:26,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888627636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [968819659] [2022-11-03 01:38:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:26,302 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:38:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:38:26,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:38:26,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 01:38:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:28,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:38:28,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:28,597 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 01:38:28,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:28,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [968819659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:28,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:28,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 01:38:28,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118350518] [2022-11-03 01:38:28,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:28,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:38:28,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:38:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:38:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:38:28,600 INFO L87 Difference]: Start difference. First operand 302 states and 383 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:38:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:28,842 INFO L93 Difference]: Finished difference Result 618 states and 797 transitions. [2022-11-03 01:38:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:38:28,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 157 [2022-11-03 01:38:28,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:28,851 INFO L225 Difference]: With dead ends: 618 [2022-11-03 01:38:28,852 INFO L226 Difference]: Without dead ends: 360 [2022-11-03 01:38:28,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 459 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 01:38:28,856 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 275 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:28,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1104 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:38:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-03 01:38:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 311. [2022-11-03 01:38:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 295 states have (on average 1.230508474576271) internal successors, (363), 302 states have internal predecessors, (363), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-03 01:38:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 387 transitions. [2022-11-03 01:38:28,875 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 387 transitions. Word has length 157 [2022-11-03 01:38:28,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:28,876 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 387 transitions. [2022-11-03 01:38:28,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:38:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 387 transitions. [2022-11-03 01:38:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-03 01:38:28,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:28,878 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:28,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:29,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:29,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:38:29,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:29,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:29,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2067714043, now seen corresponding path program 1 times [2022-11-03 01:38:29,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:38:29,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123813720] [2022-11-03 01:38:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:29,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:38:29,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:38:29,312 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:38:29,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:38:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:31,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:38:31,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:31,273 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 01:38:31,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:31,400 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 01:38:31,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:38:31,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123813720] [2022-11-03 01:38:31,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123813720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:31,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1470999696] [2022-11-03 01:38:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:31,401 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:38:31,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:38:31,407 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:38:31,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 01:38:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:33,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:38:33,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:34,178 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 01:38:34,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:34,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1470999696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:34,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:34,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 01:38:34,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68458043] [2022-11-03 01:38:34,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:34,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:38:34,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:38:34,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:38:34,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:38:34,181 INFO L87 Difference]: Start difference. First operand 311 states and 387 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:38:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:34,864 INFO L93 Difference]: Finished difference Result 805 states and 1018 transitions. [2022-11-03 01:38:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:38:34,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 157 [2022-11-03 01:38:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:34,868 INFO L225 Difference]: With dead ends: 805 [2022-11-03 01:38:34,868 INFO L226 Difference]: Without dead ends: 538 [2022-11-03 01:38:34,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 461 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 01:38:34,870 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 225 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:34,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 712 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:38:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-03 01:38:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2022-11-03 01:38:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 511 states have (on average 1.2367906066536203) internal successors, (632), 523 states have internal predecessors, (632), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (24), 12 states have call predecessors, (24), 20 states have call successors, (24) [2022-11-03 01:38:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 676 transitions. [2022-11-03 01:38:34,921 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 676 transitions. Word has length 157 [2022-11-03 01:38:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:34,922 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 676 transitions. [2022-11-03 01:38:34,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:38:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 676 transitions. [2022-11-03 01:38:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-03 01:38:34,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:34,926 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:34,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:35,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:35,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:38:35,347 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:35,348 INFO L85 PathProgramCache]: Analyzing trace with hash -996391097, now seen corresponding path program 1 times [2022-11-03 01:38:35,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:38:35,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369418210] [2022-11-03 01:38:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:35,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:38:35,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:38:35,351 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:38:35,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:38:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:37,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:38:37,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:37,482 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 01:38:37,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:37,613 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 01:38:37,613 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:38:37,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369418210] [2022-11-03 01:38:37,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369418210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:37,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [54938492] [2022-11-03 01:38:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:37,614 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:38:37,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:38:37,616 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:38:37,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 01:38:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:40,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:38:40,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:38:41,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:41,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [54938492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:41,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:41,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 01:38:41,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982454736] [2022-11-03 01:38:41,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:41,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:38:41,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:38:41,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:38:41,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:38:41,172 INFO L87 Difference]: Start difference. First operand 536 states and 676 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:38:42,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:42,167 INFO L93 Difference]: Finished difference Result 923 states and 1166 transitions. [2022-11-03 01:38:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:38:42,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 164 [2022-11-03 01:38:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:42,182 INFO L225 Difference]: With dead ends: 923 [2022-11-03 01:38:42,182 INFO L226 Difference]: Without dead ends: 665 [2022-11-03 01:38:42,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 482 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 01:38:42,183 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 85 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:42,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 669 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 01:38:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-11-03 01:38:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2022-11-03 01:38:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 635 states have (on average 1.2377952755905512) internal successors, (786), 647 states have internal predecessors, (786), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (28), 15 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-03 01:38:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 837 transitions. [2022-11-03 01:38:42,224 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 837 transitions. Word has length 164 [2022-11-03 01:38:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:42,224 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 837 transitions. [2022-11-03 01:38:42,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:38:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 837 transitions. [2022-11-03 01:38:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 01:38:42,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:42,228 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:42,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:42,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:42,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:38:42,641 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash 710910694, now seen corresponding path program 1 times [2022-11-03 01:38:42,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:38:42,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903585388] [2022-11-03 01:38:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:42,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:38:42,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:38:42,644 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:38:42,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:38:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:44,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:38:44,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:44,540 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 01:38:44,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:44,684 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 01:38:44,685 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:38:44,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903585388] [2022-11-03 01:38:44,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903585388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:44,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1252297528] [2022-11-03 01:38:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:44,685 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:38:44,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:38:44,687 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:38:44,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 01:38:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:47,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:38:47,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 01:38:47,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:47,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1252297528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:47,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:47,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 01:38:47,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922764140] [2022-11-03 01:38:47,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:47,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:38:47,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:38:47,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:38:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:38:47,219 INFO L87 Difference]: Start difference. First operand 663 states and 837 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:38:47,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:47,447 INFO L93 Difference]: Finished difference Result 881 states and 1145 transitions. [2022-11-03 01:38:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:38:47,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 174 [2022-11-03 01:38:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:47,452 INFO L225 Difference]: With dead ends: 881 [2022-11-03 01:38:47,452 INFO L226 Difference]: Without dead ends: 726 [2022-11-03 01:38:47,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 512 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 01:38:47,454 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 6 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:47,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 581 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:38:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-11-03 01:38:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 723. [2022-11-03 01:38:47,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 695 states have (on average 1.2172661870503596) internal successors, (846), 707 states have internal predecessors, (846), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (28), 15 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-03 01:38:47,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 897 transitions. [2022-11-03 01:38:47,491 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 897 transitions. Word has length 174 [2022-11-03 01:38:47,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:47,492 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 897 transitions. [2022-11-03 01:38:47,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:38:47,492 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 897 transitions. [2022-11-03 01:38:47,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 01:38:47,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:47,495 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:47,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:47,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:47,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:38:47,919 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:47,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:47,920 INFO L85 PathProgramCache]: Analyzing trace with hash 492055976, now seen corresponding path program 1 times [2022-11-03 01:38:47,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:38:47,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187915730] [2022-11-03 01:38:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:47,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:38:47,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:38:47,923 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:38:47,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:38:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:38:49,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:49,976 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 01:38:49,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:50,101 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 01:38:50,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:38:50,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187915730] [2022-11-03 01:38:50,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187915730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:50,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1110880056] [2022-11-03 01:38:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:50,102 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:38:50,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:38:50,103 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:38:50,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 01:38:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:52,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:38:52,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:52,813 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 01:38:52,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:52,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1110880056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:52,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:52,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 01:38:52,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359189007] [2022-11-03 01:38:52,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:52,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:38:52,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:38:52,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:38:52,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:38:52,815 INFO L87 Difference]: Start difference. First operand 723 states and 897 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:38:52,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:52,938 INFO L93 Difference]: Finished difference Result 1303 states and 1625 transitions. [2022-11-03 01:38:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:38:52,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 174 [2022-11-03 01:38:52,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:52,944 INFO L225 Difference]: With dead ends: 1303 [2022-11-03 01:38:52,944 INFO L226 Difference]: Without dead ends: 687 [2022-11-03 01:38:52,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 510 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 01:38:52,946 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 281 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:52,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 904 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:38:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-11-03 01:38:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 687. [2022-11-03 01:38:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 659 states have (on average 1.197268588770865) internal successors, (789), 671 states have internal predecessors, (789), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (28), 15 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-03 01:38:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 840 transitions. [2022-11-03 01:38:52,981 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 840 transitions. Word has length 174 [2022-11-03 01:38:52,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:52,982 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 840 transitions. [2022-11-03 01:38:52,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:38:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 840 transitions. [2022-11-03 01:38:52,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 01:38:52,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:52,985 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:53,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:53,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:53,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:38:53,399 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:53,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:53,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1058783132, now seen corresponding path program 1 times [2022-11-03 01:38:53,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:38:53,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636752438] [2022-11-03 01:38:53,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:53,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:38:53,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:38:53,402 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:38:53,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:38:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:55,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:38:55,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:55,365 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 01:38:55,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:55,491 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 01:38:55,491 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:38:55,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636752438] [2022-11-03 01:38:55,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636752438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:55,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1255871352] [2022-11-03 01:38:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:55,492 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:38:55,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:38:55,495 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:38:55,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 01:38:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:58,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:38:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 01:38:58,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:58,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1255871352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:58,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:58,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-03 01:38:58,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772562977] [2022-11-03 01:38:58,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:58,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:38:58,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:38:58,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:38:58,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:38:58,742 INFO L87 Difference]: Start difference. First operand 687 states and 840 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:01,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:39:04,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:39:07,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:39:09,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:39:11,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:39:11,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:11,759 INFO L93 Difference]: Finished difference Result 1496 states and 1835 transitions. [2022-11-03 01:39:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:39:11,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 174 [2022-11-03 01:39:11,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:11,766 INFO L225 Difference]: With dead ends: 1496 [2022-11-03 01:39:11,766 INFO L226 Difference]: Without dead ends: 931 [2022-11-03 01:39:11,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:39:11,768 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 543 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:11,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 623 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 149 Invalid, 2 Unknown, 0 Unchecked, 12.9s Time] [2022-11-03 01:39:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-11-03 01:39:11,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 554. [2022-11-03 01:39:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 531 states have (on average 1.1864406779661016) internal successors, (630), 538 states have internal predecessors, (630), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-03 01:39:11,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 671 transitions. [2022-11-03 01:39:11,805 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 671 transitions. Word has length 174 [2022-11-03 01:39:11,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:11,806 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 671 transitions. [2022-11-03 01:39:11,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 671 transitions. [2022-11-03 01:39:11,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-03 01:39:11,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:11,809 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:11,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:12,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-03 01:39:12,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:39:12,223 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:12,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:12,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1629204528, now seen corresponding path program 1 times [2022-11-03 01:39:12,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:39:12,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766422027] [2022-11-03 01:39:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:12,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:39:12,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:39:12,226 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:39:12,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:39:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:14,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:39:14,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:14,425 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 01:39:14,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:14,554 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 01:39:14,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:39:14,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766422027] [2022-11-03 01:39:14,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766422027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:14,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [775129952] [2022-11-03 01:39:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:14,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:39:14,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:39:14,555 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:39:14,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 01:39:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:17,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:39:17,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 01:39:17,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:39:17,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [775129952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:17,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:39:17,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-03 01:39:17,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883924945] [2022-11-03 01:39:17,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:17,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:39:17,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:39:17,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:39:17,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:39:17,619 INFO L87 Difference]: Start difference. First operand 554 states and 671 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:17,764 INFO L93 Difference]: Finished difference Result 639 states and 783 transitions. [2022-11-03 01:39:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:39:17,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 181 [2022-11-03 01:39:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:17,768 INFO L225 Difference]: With dead ends: 639 [2022-11-03 01:39:17,768 INFO L226 Difference]: Without dead ends: 542 [2022-11-03 01:39:17,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:39:17,769 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 79 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:17,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 774 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:39:17,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-03 01:39:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 537. [2022-11-03 01:39:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 514 states have (on average 1.171206225680934) internal successors, (602), 521 states have internal predecessors, (602), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (23), 14 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-03 01:39:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 643 transitions. [2022-11-03 01:39:17,802 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 643 transitions. Word has length 181 [2022-11-03 01:39:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:17,803 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 643 transitions. [2022-11-03 01:39:17,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 643 transitions. [2022-11-03 01:39:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-03 01:39:17,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:17,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:17,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:18,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:18,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:39:18,227 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:18,228 INFO L85 PathProgramCache]: Analyzing trace with hash 279599070, now seen corresponding path program 1 times [2022-11-03 01:39:18,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:39:18,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352980925] [2022-11-03 01:39:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:18,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:39:18,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:39:18,230 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:39:18,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:39:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:20,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:39:20,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:20,392 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 01:39:20,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:20,501 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 01:39:20,501 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:39:20,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352980925] [2022-11-03 01:39:20,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352980925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:20,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1290317719] [2022-11-03 01:39:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:20,502 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:39:20,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:39:20,503 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:39:20,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 01:39:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:24,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:39:24,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:24,275 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 01:39:24,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:24,344 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 01:39:24,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1290317719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:24,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846157324] [2022-11-03 01:39:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:24,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:24,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:24,346 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:39:24,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 01:39:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:26,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:39:26,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:26,773 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 01:39:26,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:27,233 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 01:39:27,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846157324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:27,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:39:27,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 12 [2022-11-03 01:39:27,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661786998] [2022-11-03 01:39:27,234 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:39:27,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:39:27,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:39:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:39:27,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:39:27,236 INFO L87 Difference]: Start difference. First operand 537 states and 643 transitions. Second operand has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 01:39:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:29,099 INFO L93 Difference]: Finished difference Result 1837 states and 2277 transitions. [2022-11-03 01:39:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:39:29,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 181 [2022-11-03 01:39:29,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:29,105 INFO L225 Difference]: With dead ends: 1837 [2022-11-03 01:39:29,105 INFO L226 Difference]: Without dead ends: 1347 [2022-11-03 01:39:29,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 1071 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 01:39:29,107 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 1423 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:29,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1459 Valid, 2318 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:39:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-11-03 01:39:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1197. [2022-11-03 01:39:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1152 states have (on average 1.1822916666666667) internal successors, (1362), 1159 states have internal predecessors, (1362), 39 states have call successors, (39), 3 states have call predecessors, (39), 4 states have return successors, (53), 35 states have call predecessors, (53), 39 states have call successors, (53) [2022-11-03 01:39:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1454 transitions. [2022-11-03 01:39:29,189 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1454 transitions. Word has length 181 [2022-11-03 01:39:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:29,189 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1454 transitions. [2022-11-03 01:39:29,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.75) internal successors, (393), 12 states have internal predecessors, (393), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 01:39:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1454 transitions. [2022-11-03 01:39:29,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-11-03 01:39:29,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:29,201 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:29,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:29,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:29,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:29,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:39:29,809 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:29,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:29,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1594843483, now seen corresponding path program 1 times [2022-11-03 01:39:29,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:39:29,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263601374] [2022-11-03 01:39:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:29,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:39:29,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:39:29,813 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:39:29,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:39:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:40,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 7499 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:39:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:40,490 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 01:39:40,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:40,784 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 01:39:40,784 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:39:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263601374] [2022-11-03 01:39:40,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263601374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [249177683] [2022-11-03 01:39:40,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:40,785 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:39:40,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:39:40,791 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:39:40,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 01:39:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:52,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 7499 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:39:52,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:52,929 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 01:39:52,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:53,059 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 01:39:53,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [249177683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:53,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016206000] [2022-11-03 01:39:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:53,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:53,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:53,061 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:39:53,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 01:40:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 7499 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:40:03,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:03,358 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 01:40:03,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:03,648 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 01:40:03,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016206000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:03,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:40:03,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2022-11-03 01:40:03,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172313313] [2022-11-03 01:40:03,650 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:03,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:40:03,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:03,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:40:03,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:40:03,653 INFO L87 Difference]: Start difference. First operand 1197 states and 1454 transitions. Second operand has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:40:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:05,585 INFO L93 Difference]: Finished difference Result 2373 states and 3017 transitions. [2022-11-03 01:40:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 01:40:05,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 483 [2022-11-03 01:40:05,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:05,591 INFO L225 Difference]: With dead ends: 2373 [2022-11-03 01:40:05,592 INFO L226 Difference]: Without dead ends: 1217 [2022-11-03 01:40:05,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2917 GetRequests, 2874 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 01:40:05,595 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 141 mSDsluCounter, 2588 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 2884 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:05,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 2884 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:40:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-11-03 01:40:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1209. [2022-11-03 01:40:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1164 states have (on average 1.1838487972508591) internal successors, (1378), 1171 states have internal predecessors, (1378), 39 states have call successors, (39), 3 states have call predecessors, (39), 4 states have return successors, (53), 35 states have call predecessors, (53), 39 states have call successors, (53) [2022-11-03 01:40:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1470 transitions. [2022-11-03 01:40:05,683 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1470 transitions. Word has length 483 [2022-11-03 01:40:05,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:05,683 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1470 transitions. [2022-11-03 01:40:05,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:40:05,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1470 transitions. [2022-11-03 01:40:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-11-03 01:40:05,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:05,689 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:05,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-11-03 01:40:06,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:06,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:06,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:40:06,303 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1570235227, now seen corresponding path program 2 times [2022-11-03 01:40:06,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:06,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458903599] [2022-11-03 01:40:06,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:40:06,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:06,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:06,308 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:06,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:40:18,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:40:18,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:40:18,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 7763 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:40:18,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:18,873 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 01:40:18,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:19,813 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 01:40:19,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:19,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458903599] [2022-11-03 01:40:19,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458903599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:19,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1395828627] [2022-11-03 01:40:19,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:40:19,814 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:19,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:40:19,815 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:40:19,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 01:40:34,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:40:34,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:40:34,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 7763 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:40:34,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:34,495 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 01:40:34,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:34,789 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 01:40:34,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1395828627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:34,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737100300] [2022-11-03 01:40:34,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:40:34,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:34,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:34,791 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:34,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 01:40:45,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:40:45,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:40:46,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 7763 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:40:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:47,400 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 01:40:47,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:49,166 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 01:40:49,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737100300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:49,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:40:49,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 7, 7] total 36 [2022-11-03 01:40:49,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133364924] [2022-11-03 01:40:49,169 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:49,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 01:40:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 01:40:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:40:49,173 INFO L87 Difference]: Start difference. First operand 1209 states and 1470 transitions. Second operand has 36 states, 36 states have (on average 28.88888888888889) internal successors, (1040), 36 states have internal predecessors, (1040), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 01:41:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:12,641 INFO L93 Difference]: Finished difference Result 4740 states and 6254 transitions. [2022-11-03 01:41:12,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 01:41:12,642 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 28.88888888888889) internal successors, (1040), 36 states have internal predecessors, (1040), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 507 [2022-11-03 01:41:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:12,656 INFO L225 Difference]: With dead ends: 4740 [2022-11-03 01:41:12,656 INFO L226 Difference]: Without dead ends: 3574 [2022-11-03 01:41:12,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3075 GetRequests, 3006 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1091, Invalid=3879, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 01:41:12,662 INFO L413 NwaCegarLoop]: 1311 mSDtfsCounter, 4114 mSDsluCounter, 22021 mSDsCounter, 0 mSdLazyCounter, 5384 mSolverCounterSat, 1308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4286 SdHoareTripleChecker+Valid, 23332 SdHoareTripleChecker+Invalid, 6692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1308 IncrementalHoareTripleChecker+Valid, 5384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:12,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4286 Valid, 23332 Invalid, 6692 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1308 Valid, 5384 Invalid, 0 Unknown, 0 Unchecked, 19.4s Time] [2022-11-03 01:41:12,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2022-11-03 01:41:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 3186. [2022-11-03 01:41:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3081 states have (on average 1.1775397598182409) internal successors, (3628), 3088 states have internal predecessors, (3628), 99 states have call successors, (99), 3 states have call predecessors, (99), 4 states have return successors, (137), 95 states have call predecessors, (137), 99 states have call successors, (137) [2022-11-03 01:41:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3864 transitions. [2022-11-03 01:41:12,879 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3864 transitions. Word has length 507 [2022-11-03 01:41:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:12,880 INFO L495 AbstractCegarLoop]: Abstraction has 3186 states and 3864 transitions. [2022-11-03 01:41:12,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 28.88888888888889) internal successors, (1040), 36 states have internal predecessors, (1040), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 01:41:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3864 transitions. [2022-11-03 01:41:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1126 [2022-11-03 01:41:12,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:12,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:13,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:13,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:13,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:13,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:13,500 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:13,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:13,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1087986307, now seen corresponding path program 3 times [2022-11-03 01:41:13,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:13,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591432814] [2022-11-03 01:41:13,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:41:13,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:13,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:13,507 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:13,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef64201f-e58f-4081-a518-a06457d23943/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process