./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/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_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/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_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/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 765142a1ef820c0c2cf2fa98a3978a1412f5a1196c629c20848264001100dcc9 --- 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 04:06:00,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:06:00,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:06:01,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:06:01,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:06:01,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:06:01,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:06:01,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:06:01,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:06:01,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:06:01,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:06:01,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:06:01,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:06:01,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:06:01,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:06:01,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:06:01,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:06:01,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:06:01,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:06:01,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:06:01,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:06:01,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:06:01,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:06:01,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:06:01,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:06:01,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:06:01,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:06:01,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:06:01,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:06:01,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:06:01,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:06:01,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:06:01,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:06:01,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:06:01,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:06:01,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:06:01,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:06:01,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:06:01,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:06:01,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:06:01,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:06:01,045 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:06:01,077 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:06:01,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:06:01,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:06:01,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:06:01,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:06:01,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:06:01,080 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:06:01,081 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:06:01,081 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:06:01,081 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:06:01,082 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:06:01,082 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:06:01,083 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:06:01,083 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:06:01,083 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:06:01,083 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:06:01,083 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:06:01,084 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:06:01,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:06:01,085 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:06:01,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:06:01,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:06:01,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:06:01,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:06:01,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:06:01,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:06:01,086 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:06:01,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:06:01,087 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:06:01,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:06:01,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:06:01,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:06:01,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:06:01,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:06:01,088 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:06:01,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:06:01,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:06:01,089 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:06:01,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:06:01,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:06:01,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:06:01,090 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_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 765142a1ef820c0c2cf2fa98a3978a1412f5a1196c629c20848264001100dcc9 [2022-11-03 04:06:01,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:06:01,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:06:01,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:06:01,393 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:06:01,394 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:06:01,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i [2022-11-03 04:06:01,472 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/data/1f7d2153e/1a5b9fc5ef654552a88b6be7e5505952/FLAG696e08939 [2022-11-03 04:06:02,159 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:06:02,160 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i [2022-11-03 04:06:02,195 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/data/1f7d2153e/1a5b9fc5ef654552a88b6be7e5505952/FLAG696e08939 [2022-11-03 04:06:02,373 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/data/1f7d2153e/1a5b9fc5ef654552a88b6be7e5505952 [2022-11-03 04:06:02,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:06:02,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:06:02,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:06:02,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:06:02,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:06:02,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:06:02" (1/1) ... [2022-11-03 04:06:02,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a59f9c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:02, skipping insertion in model container [2022-11-03 04:06:02,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:06:02" (1/1) ... [2022-11-03 04:06:02,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:06:02,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:06:02,958 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_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i[33021,33034] [2022-11-03 04:06:03,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:06:03,115 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:06:03,156 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_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i[33021,33034] [2022-11-03 04:06:03,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:06:03,304 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:06:03,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03 WrapperNode [2022-11-03 04:06:03,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:06:03,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:06:03,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:06:03,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:06:03,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03" (1/1) ... [2022-11-03 04:06:03,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03" (1/1) ... [2022-11-03 04:06:03,479 INFO L138 Inliner]: procedures = 177, calls = 349, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1153 [2022-11-03 04:06:03,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:06:03,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:06:03,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:06:03,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:06:03,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03" (1/1) ... [2022-11-03 04:06:03,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03" (1/1) ... [2022-11-03 04:06:03,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03" (1/1) ... [2022-11-03 04:06:03,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03" (1/1) ... [2022-11-03 04:06:03,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03" (1/1) ... [2022-11-03 04:06:03,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03" (1/1) ... [2022-11-03 04:06:03,591 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03" (1/1) ... [2022-11-03 04:06:03,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03" (1/1) ... [2022-11-03 04:06:03,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:06:03,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:06:03,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:06:03,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:06:03,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03" (1/1) ... [2022-11-03 04:06:03,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:06:03,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:03,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:06:03,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:06:03,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 04:06:03,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 04:06:03,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 04:06:03,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 04:06:03,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 04:06:03,708 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 04:06:03,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 04:06:03,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:06:03,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 04:06:03,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 04:06:03,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 04:06:03,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 04:06:03,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:06:03,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:06:03,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:06:03,986 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:06:03,988 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:06:05,890 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:06:06,347 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:06:06,348 INFO L300 CfgBuilder]: Removed 60 assume(true) statements. [2022-11-03 04:06:06,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:06:06 BoogieIcfgContainer [2022-11-03 04:06:06,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:06:06,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:06:06,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:06:06,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:06:06,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:06:02" (1/3) ... [2022-11-03 04:06:06,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e324edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:06:06, skipping insertion in model container [2022-11-03 04:06:06,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:03" (2/3) ... [2022-11-03 04:06:06,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e324edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:06:06, skipping insertion in model container [2022-11-03 04:06:06,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:06:06" (3/3) ... [2022-11-03 04:06:06,361 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test4-1.i [2022-11-03 04:06:06,379 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:06:06,379 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:06:06,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:06:06,437 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;@7308941, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:06:06,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:06:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 107 states have (on average 1.794392523364486) internal successors, (192), 118 states have internal predecessors, (192), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 04:06:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 04:06:06,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:06,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:06,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash 932638747, now seen corresponding path program 1 times [2022-11-03 04:06:06,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:06,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631716484] [2022-11-03 04:06:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:06,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:06,688 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 04:06:06,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:06,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631716484] [2022-11-03 04:06:06,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631716484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:06,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:06:06,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:06:06,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11288847] [2022-11-03 04:06:06,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:06,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:06:06,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:06,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:06:06,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:06:06,737 INFO L87 Difference]: Start difference. First operand has 127 states, 107 states have (on average 1.794392523364486) internal successors, (192), 118 states have internal predecessors, (192), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:10,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 04:06:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:10,249 INFO L93 Difference]: Finished difference Result 347 states and 628 transitions. [2022-11-03 04:06:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:06:10,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 04:06:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:10,287 INFO L225 Difference]: With dead ends: 347 [2022-11-03 04:06:10,287 INFO L226 Difference]: Without dead ends: 220 [2022-11-03 04:06:10,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:06:10,294 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 97 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:10,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 317 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 04:06:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-03 04:06:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 127. [2022-11-03 04:06:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 108 states have (on average 1.212962962962963) internal successors, (131), 118 states have internal predecessors, (131), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 04:06:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2022-11-03 04:06:10,378 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 8 [2022-11-03 04:06:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:10,378 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2022-11-03 04:06:10,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2022-11-03 04:06:10,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 04:06:10,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:10,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:10,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:06:10,383 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:10,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:10,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1435055736, now seen corresponding path program 1 times [2022-11-03 04:06:10,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:10,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437311915] [2022-11-03 04:06:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:10,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:10,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:06:10,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140233525] [2022-11-03 04:06:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:10,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:10,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:10,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:10,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:06:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:12,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 3056 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:06:12,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:12,278 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 04:06:12,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:12,372 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 04:06:12,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:12,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437311915] [2022-11-03 04:06:12,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:06:12,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140233525] [2022-11-03 04:06:12,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140233525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:12,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [713046035] [2022-11-03 04:06:12,393 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-03 04:06:12,393 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:06:12,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:06:12,403 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:06:12,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:06:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:12,553 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 04:06:12,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:12,566 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 04:06:12,606 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 04:06:12,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 04:06:12,619 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 04:06:12,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:12,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:06:12,633 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 04:06:12,951 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 04:06:12,967 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 04:06:12,980 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 04:06:12,988 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 04:06:13,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:06:13,084 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 04:06:13,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-03 04:06:13,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:13,102 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 04:06:13,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:13,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:06:13,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:13,131 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:06:13,132 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 04:06:13,180 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 04:06:13,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 04:06:13,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:13,213 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 04:06:13,544 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 04:06:13,554 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 04:06:13,576 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 04:06:13,594 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 04:06:13,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:06:13,632 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:06:14,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [713046035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:14,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:06:14,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3] total 11 [2022-11-03 04:06:14,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675716559] [2022-11-03 04:06:14,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:14,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:06:14,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:14,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:06:14,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:06:14,575 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:19,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 04:06:20,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 04:06:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:22,466 INFO L93 Difference]: Finished difference Result 271 states and 347 transitions. [2022-11-03 04:06:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:06:22,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 04:06:22,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:22,469 INFO L225 Difference]: With dead ends: 271 [2022-11-03 04:06:22,469 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 04:06:22,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:06:22,471 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 13 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:22,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 465 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-11-03 04:06:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 04:06:22,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2022-11-03 04:06:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 118 states have (on average 1.194915254237288) internal successors, (141), 128 states have internal predecessors, (141), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 04:06:22,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2022-11-03 04:06:22,488 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 52 [2022-11-03 04:06:22,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:22,488 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2022-11-03 04:06:22,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2022-11-03 04:06:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 04:06:22,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:22,491 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:22,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:22,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:22,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:22,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:22,720 INFO L85 PathProgramCache]: Analyzing trace with hash 886940783, now seen corresponding path program 1 times [2022-11-03 04:06:22,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:22,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000647243] [2022-11-03 04:06:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:22,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:06:22,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185330578] [2022-11-03 04:06:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:22,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:22,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:22,904 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:22,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:06:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:23,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:06:23,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:24,082 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 04:06:24,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:24,208 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 04:06:24,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:24,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000647243] [2022-11-03 04:06:24,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:06:24,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185330578] [2022-11-03 04:06:24,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185330578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:24,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1069779541] [2022-11-03 04:06:24,213 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-03 04:06:24,213 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:06:24,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:06:24,214 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:06:24,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:06:24,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:24,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:06:24,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:24,394 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:06:24,394 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 04:06:24,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:24,409 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 04:06:24,449 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 04:06:24,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 04:06:24,462 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 04:06:24,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:24,479 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 04:06:24,686 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 04:06:24,706 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 04:06:24,755 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 04:06:24,764 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 04:06:24,796 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:06:24,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2022-11-03 04:06:24,810 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 04:06:24,822 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 04:06:24,859 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 04:06:24,871 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 04:06:24,880 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 04:06:24,899 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 04:06:24,920 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 04:06:25,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:25,040 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 04:06:25,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:25,050 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 04:06:25,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:25,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:06:25,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:25,072 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:06:25,073 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 04:06:25,110 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 04:06:25,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-03 04:06:25,158 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 04:06:25,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 04:06:25,416 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 04:06:25,423 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 04:06:25,436 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 04:06:25,449 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 04:06:25,478 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:06:25,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2022-11-03 04:06:25,488 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 04:06:25,499 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 04:06:25,530 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 04:06:25,548 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 04:06:25,558 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 04:06:25,566 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 04:06:25,580 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 04:06:25,695 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 78 for LOIs [2022-11-03 04:06:25,732 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:06:27,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1069779541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:06:27,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:06:27,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [4, 4] total 17 [2022-11-03 04:06:27,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949232011] [2022-11-03 04:06:27,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:06:27,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 04:06:27,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 04:06:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:06:27,076 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 04:06:33,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 04:06:36,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:36,806 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2022-11-03 04:06:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 04:06:36,806 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-11-03 04:06:36,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:36,808 INFO L225 Difference]: With dead ends: 273 [2022-11-03 04:06:36,808 INFO L226 Difference]: Without dead ends: 148 [2022-11-03 04:06:36,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:06:36,809 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 11 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:36,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 648 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 288 Invalid, 0 Unknown, 88 Unchecked, 7.9s Time] [2022-11-03 04:06:36,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-03 04:06:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2022-11-03 04:06:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 132 states have internal predecessors, (145), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 04:06:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2022-11-03 04:06:36,829 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 65 [2022-11-03 04:06:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:36,829 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2022-11-03 04:06:36,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 04:06:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2022-11-03 04:06:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 04:06:36,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:36,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:36,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 04:06:37,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:37,039 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash -666566505, now seen corresponding path program 1 times [2022-11-03 04:06:37,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:37,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656727333] [2022-11-03 04:06:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:37,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:37,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:06:37,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212908834] [2022-11-03 04:06:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:37,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:37,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:37,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:37,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:06:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:38,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:06:38,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:38,496 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 04:06:38,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:38,600 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 04:06:38,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:38,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656727333] [2022-11-03 04:06:38,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:06:38,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212908834] [2022-11-03 04:06:38,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212908834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:38,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [320903829] [2022-11-03 04:06:38,605 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-03 04:06:38,605 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:06:38,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:06:38,606 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:06:38,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:06:38,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:38,722 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 04:06:38,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:38,732 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 04:06:38,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:38,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:06:38,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:06:38,753 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:06:38,754 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 04:06:38,791 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 04:06:38,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-03 04:06:38,837 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 04:06:38,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 04:06:39,083 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 04:06:39,095 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 04:06:39,106 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 04:06:39,113 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 04:06:39,131 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 04:06:39,144 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 04:06:39,152 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 04:06:39,163 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 04:06:39,191 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 04:06:39,200 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 04:06:39,208 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 04:06:39,222 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 04:06:39,239 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 04:06:39,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 04:06:39,288 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 04:06:39,293 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 04:06:39,307 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 04:06:39,315 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 04:06:39,322 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 04:06:39,339 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 04:06:39,344 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 04:06:39,349 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 04:06:39,389 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:06:39,389 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 04:06:39,403 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:06:39,403 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 04:06:39,420 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:06:39,421 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 04:06:39,484 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:06:39,484 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 04:06:39,502 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:06:39,503 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 04:06:39,516 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:06:39,517 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 04:06:48,634 WARN L234 SmtUtils]: Spent 9.04s 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 04:06:48,635 INFO L356 Elim1Store]: treesize reduction 340, result has 16.0 percent of original size [2022-11-03 04:06:48,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:48,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:48,836 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: |v_#memory_$Pointer$.base_508| input size 141 context size 141 output size 141 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 04:06:48,841 INFO L158 Benchmark]: Toolchain (without parser) took 46462.38ms. Allocated memory was 100.7MB in the beginning and 312.5MB in the end (delta: 211.8MB). Free memory was 77.1MB in the beginning and 77.1MB in the end (delta: 27.6kB). Peak memory consumption was 211.8MB. Max. memory is 16.1GB. [2022-11-03 04:06:48,841 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 100.7MB. Free memory was 74.6MB in the beginning and 74.5MB in the end (delta: 85.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:06:48,841 INFO L158 Benchmark]: CACSL2BoogieTranslator took 924.42ms. Allocated memory is still 100.7MB. Free memory was 77.1MB in the beginning and 51.3MB in the end (delta: 25.8MB). Peak memory consumption was 25.5MB. Max. memory is 16.1GB. [2022-11-03 04:06:48,842 INFO L158 Benchmark]: Boogie Procedure Inliner took 173.14ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 51.3MB in the beginning and 94.2MB in the end (delta: -43.0MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. [2022-11-03 04:06:48,842 INFO L158 Benchmark]: Boogie Preprocessor took 141.50ms. Allocated memory is still 123.7MB. Free memory was 94.2MB in the beginning and 84.7MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 04:06:48,842 INFO L158 Benchmark]: RCFGBuilder took 2728.73ms. Allocated memory was 123.7MB in the beginning and 161.5MB in the end (delta: 37.7MB). Free memory was 84.7MB in the beginning and 96.9MB in the end (delta: -12.2MB). Peak memory consumption was 73.4MB. Max. memory is 16.1GB. [2022-11-03 04:06:48,843 INFO L158 Benchmark]: TraceAbstraction took 42487.33ms. Allocated memory was 161.5MB in the beginning and 312.5MB in the end (delta: 151.0MB). Free memory was 95.8MB in the beginning and 77.1MB in the end (delta: 18.8MB). Peak memory consumption was 169.1MB. Max. memory is 16.1GB. [2022-11-03 04:06:48,844 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 100.7MB. Free memory was 74.6MB in the beginning and 74.5MB in the end (delta: 85.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 924.42ms. Allocated memory is still 100.7MB. Free memory was 77.1MB in the beginning and 51.3MB in the end (delta: 25.8MB). Peak memory consumption was 25.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 173.14ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 51.3MB in the beginning and 94.2MB in the end (delta: -43.0MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 141.50ms. Allocated memory is still 123.7MB. Free memory was 94.2MB in the beginning and 84.7MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 2728.73ms. Allocated memory was 123.7MB in the beginning and 161.5MB in the end (delta: 37.7MB). Free memory was 84.7MB in the beginning and 96.9MB in the end (delta: -12.2MB). Peak memory consumption was 73.4MB. Max. memory is 16.1GB. * TraceAbstraction took 42487.33ms. Allocated memory was 161.5MB in the beginning and 312.5MB in the end (delta: 151.0MB). Free memory was 95.8MB in the beginning and 77.1MB in the end (delta: 18.8MB). Peak memory consumption was 169.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_508| input size 141 context size 141 output size 141 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_508| input size 141 context size 141 output size 141: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 04:06:48,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/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_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/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_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/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 765142a1ef820c0c2cf2fa98a3978a1412f5a1196c629c20848264001100dcc9 --- 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 04:06:51,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:06:51,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:06:51,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:06:51,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:06:51,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:06:51,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:06:51,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:06:51,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:06:51,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:06:51,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:06:51,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:06:51,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:06:51,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:06:51,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:06:51,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:06:51,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:06:51,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:06:51,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:06:51,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:06:51,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:06:51,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:06:51,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:06:51,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:06:51,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:06:51,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:06:51,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:06:51,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:06:51,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:06:51,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:06:51,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:06:51,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:06:51,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:06:51,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:06:51,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:06:51,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:06:51,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:06:51,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:06:51,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:06:51,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:06:51,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:06:51,358 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 04:06:51,395 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:06:51,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:06:51,397 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:06:51,397 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:06:51,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:06:51,398 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:06:51,398 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:06:51,398 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:06:51,399 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:06:51,399 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:06:51,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:06:51,400 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:06:51,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:06:51,402 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:06:51,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:06:51,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:06:51,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:06:51,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:06:51,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:06:51,403 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 04:06:51,403 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 04:06:51,404 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 04:06:51,404 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:06:51,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:06:51,404 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:06:51,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:06:51,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:06:51,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 04:06:51,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:06:51,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:06:51,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:06:51,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:06:51,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:06:51,407 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 04:06:51,407 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 04:06:51,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:06:51,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:06:51,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 04:06:51,408 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_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 765142a1ef820c0c2cf2fa98a3978a1412f5a1196c629c20848264001100dcc9 [2022-11-03 04:06:51,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:06:51,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:06:51,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:06:51,813 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:06:51,813 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:06:51,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i [2022-11-03 04:06:51,884 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/data/a5eba9d61/eaf977b74b9d4e97837ee05dc3389c0d/FLAG348119509 [2022-11-03 04:06:52,582 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:06:52,582 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i [2022-11-03 04:06:52,611 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/data/a5eba9d61/eaf977b74b9d4e97837ee05dc3389c0d/FLAG348119509 [2022-11-03 04:06:52,845 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/data/a5eba9d61/eaf977b74b9d4e97837ee05dc3389c0d [2022-11-03 04:06:52,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:06:52,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:06:52,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:06:52,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:06:52,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:06:52,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:06:52" (1/1) ... [2022-11-03 04:06:52,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@480f61d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:52, skipping insertion in model container [2022-11-03 04:06:52,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:06:52" (1/1) ... [2022-11-03 04:06:52,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:06:52,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:06:53,483 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_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i[33021,33034] [2022-11-03 04:06:53,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:06:53,702 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 04:06:53,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:06:53,752 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_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i[33021,33034] [2022-11-03 04:06:53,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:06:53,854 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:06:53,893 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_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i[33021,33034] [2022-11-03 04:06:53,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:06:54,036 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:06:54,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54 WrapperNode [2022-11-03 04:06:54,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:06:54,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:06:54,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:06:54,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:06:54,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54" (1/1) ... [2022-11-03 04:06:54,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54" (1/1) ... [2022-11-03 04:06:54,170 INFO L138 Inliner]: procedures = 180, calls = 349, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1154 [2022-11-03 04:06:54,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:06:54,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:06:54,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:06:54,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:06:54,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54" (1/1) ... [2022-11-03 04:06:54,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54" (1/1) ... [2022-11-03 04:06:54,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54" (1/1) ... [2022-11-03 04:06:54,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54" (1/1) ... [2022-11-03 04:06:54,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54" (1/1) ... [2022-11-03 04:06:54,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54" (1/1) ... [2022-11-03 04:06:54,295 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54" (1/1) ... [2022-11-03 04:06:54,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54" (1/1) ... [2022-11-03 04:06:54,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:06:54,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:06:54,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:06:54,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:06:54,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54" (1/1) ... [2022-11-03 04:06:54,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:06:54,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:54,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:06:54,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:06:54,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 04:06:54,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 04:06:54,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 04:06:54,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 04:06:54,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 04:06:54,407 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 04:06:54,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 04:06:54,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:06:54,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 04:06:54,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 04:06:54,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 04:06:54,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 04:06:54,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 04:06:54,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 04:06:54,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:06:54,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:06:54,706 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:06:54,708 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:07:04,807 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:07:04,819 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:07:04,819 INFO L300 CfgBuilder]: Removed 60 assume(true) statements. [2022-11-03 04:07:04,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:07:04 BoogieIcfgContainer [2022-11-03 04:07:04,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:07:04,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:07:04,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:07:04,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:07:04,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:06:52" (1/3) ... [2022-11-03 04:07:04,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70729717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:07:04, skipping insertion in model container [2022-11-03 04:07:04,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:54" (2/3) ... [2022-11-03 04:07:04,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70729717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:07:04, skipping insertion in model container [2022-11-03 04:07:04,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:07:04" (3/3) ... [2022-11-03 04:07:04,832 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test4-1.i [2022-11-03 04:07:04,849 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:07:04,850 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:07:04,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:07:04,926 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;@31ee7660, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:07:04,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:07:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 191 states have (on average 1.6806282722513088) internal successors, (321), 202 states have internal predecessors, (321), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 04:07:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 04:07:04,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:04,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:04,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:04,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:04,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1530402564, now seen corresponding path program 1 times [2022-11-03 04:07:04,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:04,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789842034] [2022-11-03 04:07:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:04,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:04,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:04,967 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:05,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 04:07:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:05,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:07:05,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:05,249 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 04:07:05,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:05,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:05,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789842034] [2022-11-03 04:07:05,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789842034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:05,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:05,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:07:05,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906876822] [2022-11-03 04:07:05,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:05,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:07:05,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:05,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:07:05,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:07:05,299 INFO L87 Difference]: Start difference. First operand has 211 states, 191 states have (on average 1.6806282722513088) internal successors, (321), 202 states have internal predecessors, (321), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:05,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:05,593 INFO L93 Difference]: Finished difference Result 590 states and 1005 transitions. [2022-11-03 04:07:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:07:05,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 04:07:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:05,614 INFO L225 Difference]: With dead ends: 590 [2022-11-03 04:07:05,614 INFO L226 Difference]: Without dead ends: 377 [2022-11-03 04:07:05,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:07:05,622 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 211 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:05,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 571 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:07:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-03 04:07:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 208. [2022-11-03 04:07:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 199 states have internal predecessors, (250), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 04:07:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 282 transitions. [2022-11-03 04:07:05,681 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 282 transitions. Word has length 10 [2022-11-03 04:07:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:05,682 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 282 transitions. [2022-11-03 04:07:05,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:05,683 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 282 transitions. [2022-11-03 04:07:05,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 04:07:05,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:05,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:05,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:05,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:05,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:05,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1947342789, now seen corresponding path program 1 times [2022-11-03 04:07:05,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:05,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806294909] [2022-11-03 04:07:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:05,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:05,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:05,910 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:05,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 04:07:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 2037 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:07:08,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:08,288 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 04:07:08,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:08,291 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:08,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806294909] [2022-11-03 04:07:08,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806294909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:08,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:08,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:07:08,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980995283] [2022-11-03 04:07:08,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:08,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:08,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:08,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:07:08,301 INFO L87 Difference]: Start difference. First operand 208 states and 282 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:08,482 INFO L93 Difference]: Finished difference Result 422 states and 573 transitions. [2022-11-03 04:07:08,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:07:08,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-03 04:07:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:08,489 INFO L225 Difference]: With dead ends: 422 [2022-11-03 04:07:08,489 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 04:07:08,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:08,495 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 225 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:08,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 536 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 04:07:08,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2022-11-03 04:07:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 192 states have (on average 1.2760416666666667) internal successors, (245), 202 states have internal predecessors, (245), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 04:07:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2022-11-03 04:07:08,540 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 108 [2022-11-03 04:07:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:08,541 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2022-11-03 04:07:08,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:08,541 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2022-11-03 04:07:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 04:07:08,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:08,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:08,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:08,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:08,771 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:08,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2120497223, now seen corresponding path program 1 times [2022-11-03 04:07:08,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:08,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127914343] [2022-11-03 04:07:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:08,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:08,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:08,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:08,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 04:07:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:10,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:07:10,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:11,247 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 04:07:11,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:11,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:11,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127914343] [2022-11-03 04:07:11,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127914343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:11,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:11,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:07:11,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306837449] [2022-11-03 04:07:11,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:11,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:07:11,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:11,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:07:11,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:07:11,255 INFO L87 Difference]: Start difference. First operand 211 states and 277 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:11,588 INFO L93 Difference]: Finished difference Result 460 states and 597 transitions. [2022-11-03 04:07:11,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:07:11,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-03 04:07:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:11,596 INFO L225 Difference]: With dead ends: 460 [2022-11-03 04:07:11,597 INFO L226 Difference]: Without dead ends: 252 [2022-11-03 04:07:11,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:07:11,599 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 11 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:11,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:07:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-03 04:07:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-11-03 04:07:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 233 states have (on average 1.2446351931330473) internal successors, (290), 243 states have internal predecessors, (290), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 04:07:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 322 transitions. [2022-11-03 04:07:11,620 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 322 transitions. Word has length 108 [2022-11-03 04:07:11,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:11,621 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 322 transitions. [2022-11-03 04:07:11,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 322 transitions. [2022-11-03 04:07:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 04:07:11,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:11,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:11,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:11,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:11,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:11,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:11,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1107731226, now seen corresponding path program 1 times [2022-11-03 04:07:11,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:11,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467862326] [2022-11-03 04:07:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:11,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:11,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:11,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:11,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 04:07:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:13,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:07:13,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:13,556 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 04:07:13,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:13,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:13,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467862326] [2022-11-03 04:07:13,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467862326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:13,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:13,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:07:13,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155615313] [2022-11-03 04:07:13,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:13,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:13,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:13,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:13,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:07:13,560 INFO L87 Difference]: Start difference. First operand 252 states and 322 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 04:07:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:13,644 INFO L93 Difference]: Finished difference Result 463 states and 605 transitions. [2022-11-03 04:07:13,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:07:13,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 123 [2022-11-03 04:07:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:13,647 INFO L225 Difference]: With dead ends: 463 [2022-11-03 04:07:13,647 INFO L226 Difference]: Without dead ends: 255 [2022-11-03 04:07:13,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:13,649 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 2 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:13,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-03 04:07:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-11-03 04:07:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 235 states have (on average 1.2468085106382978) internal successors, (293), 246 states have internal predecessors, (293), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-03 04:07:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 327 transitions. [2022-11-03 04:07:13,665 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 327 transitions. Word has length 123 [2022-11-03 04:07:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:13,665 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 327 transitions. [2022-11-03 04:07:13,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 04:07:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 327 transitions. [2022-11-03 04:07:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 04:07:13,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:13,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:13,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:13,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:13,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:13,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:13,892 INFO L85 PathProgramCache]: Analyzing trace with hash -815535364, now seen corresponding path program 1 times [2022-11-03 04:07:13,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:13,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547206232] [2022-11-03 04:07:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:13,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:13,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:13,894 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:13,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 04:07:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:15,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:07:15,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:15,712 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 04:07:15,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:15,858 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 04:07:15,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:15,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547206232] [2022-11-03 04:07:15,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547206232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1083151932] [2022-11-03 04:07:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:15,863 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:15,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:15,869 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:15,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 04:07:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:17,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:07:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:17,995 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 04:07:17,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:17,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1083151932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:17,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:07:17,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 04:07:17,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845028620] [2022-11-03 04:07:17,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:17,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:07:17,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:17,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:07:17,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:07:17,998 INFO L87 Difference]: Start difference. First operand 255 states and 327 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 04:07:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:18,169 INFO L93 Difference]: Finished difference Result 524 states and 685 transitions. [2022-11-03 04:07:18,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:07:18,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2022-11-03 04:07:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:18,175 INFO L225 Difference]: With dead ends: 524 [2022-11-03 04:07:18,175 INFO L226 Difference]: Without dead ends: 313 [2022-11-03 04:07:18,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:07:18,179 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 216 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:18,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 802 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-03 04:07:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 264. [2022-11-03 04:07:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 244 states have (on average 1.2172131147540983) internal successors, (297), 255 states have internal predecessors, (297), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-03 04:07:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 331 transitions. [2022-11-03 04:07:18,209 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 331 transitions. Word has length 125 [2022-11-03 04:07:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:18,210 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 331 transitions. [2022-11-03 04:07:18,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 04:07:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 331 transitions. [2022-11-03 04:07:18,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 04:07:18,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:18,212 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:18,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:18,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:18,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:18,628 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:18,628 INFO L85 PathProgramCache]: Analyzing trace with hash -743148806, now seen corresponding path program 1 times [2022-11-03 04:07:18,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:18,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482191905] [2022-11-03 04:07:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:18,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:18,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:18,631 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:18,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 04:07:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:20,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:07:20,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:20,472 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 04:07:20,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:20,598 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 04:07:20,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:20,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482191905] [2022-11-03 04:07:20,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482191905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:20,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [843306929] [2022-11-03 04:07:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:20,599 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:20,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:20,600 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:20,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 04:07:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:22,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:07:22,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:23,387 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 04:07:23,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:23,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [843306929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:23,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:07:23,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 04:07:23,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587858517] [2022-11-03 04:07:23,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:23,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:07:23,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:23,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:07:23,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:07:23,389 INFO L87 Difference]: Start difference. First operand 264 states and 331 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 04:07:23,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:23,937 INFO L93 Difference]: Finished difference Result 574 states and 727 transitions. [2022-11-03 04:07:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:07:23,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2022-11-03 04:07:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:23,947 INFO L225 Difference]: With dead ends: 574 [2022-11-03 04:07:23,947 INFO L226 Difference]: Without dead ends: 354 [2022-11-03 04:07:23,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:07:23,949 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 52 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:23,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 509 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:07:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-03 04:07:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-11-03 04:07:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 331 states have (on average 1.2145015105740182) internal successors, (402), 342 states have internal predecessors, (402), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (22), 10 states have call predecessors, (22), 19 states have call successors, (22) [2022-11-03 04:07:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 443 transitions. [2022-11-03 04:07:23,969 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 443 transitions. Word has length 125 [2022-11-03 04:07:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:23,969 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 443 transitions. [2022-11-03 04:07:23,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 04:07:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 443 transitions. [2022-11-03 04:07:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 04:07:23,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:23,972 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:24,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:24,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:24,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:24,389 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:24,389 INFO L85 PathProgramCache]: Analyzing trace with hash -73537509, now seen corresponding path program 1 times [2022-11-03 04:07:24,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:24,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129146423] [2022-11-03 04:07:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:24,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:24,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:24,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:24,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 04:07:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:26,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:07:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:26,169 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 04:07:26,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:26,302 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 04:07:26,302 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:26,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129146423] [2022-11-03 04:07:26,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129146423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:26,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [11571608] [2022-11-03 04:07:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:26,303 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:26,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:26,304 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:26,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 04:07:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:28,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:07:28,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:28,522 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 04:07:28,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:28,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [11571608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:28,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:07:28,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 04:07:28,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963499197] [2022-11-03 04:07:28,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:28,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:07:28,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:07:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:07:28,525 INFO L87 Difference]: Start difference. First operand 354 states and 443 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 04:07:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:28,710 INFO L93 Difference]: Finished difference Result 577 states and 729 transitions. [2022-11-03 04:07:28,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:07:28,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 142 [2022-11-03 04:07:28,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:28,712 INFO L225 Difference]: With dead ends: 577 [2022-11-03 04:07:28,713 INFO L226 Difference]: Without dead ends: 330 [2022-11-03 04:07:28,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:07:28,714 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 203 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:28,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1111 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:07:28,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-03 04:07:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2022-11-03 04:07:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 307 states have (on average 1.1856677524429968) internal successors, (364), 318 states have internal predecessors, (364), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (22), 10 states have call predecessors, (22), 19 states have call successors, (22) [2022-11-03 04:07:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 405 transitions. [2022-11-03 04:07:28,734 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 405 transitions. Word has length 142 [2022-11-03 04:07:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:28,734 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 405 transitions. [2022-11-03 04:07:28,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 04:07:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 405 transitions. [2022-11-03 04:07:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 04:07:28,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:28,737 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:28,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:28,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:29,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:29,151 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash 495602191, now seen corresponding path program 1 times [2022-11-03 04:07:29,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:29,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334031679] [2022-11-03 04:07:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:29,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:29,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:29,159 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:29,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 04:07:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:30,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:07:30,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:30,910 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 04:07:30,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:31,061 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 04:07:31,061 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:31,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334031679] [2022-11-03 04:07:31,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334031679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [478841511] [2022-11-03 04:07:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:31,062 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:31,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:31,064 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:31,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 04:07:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:34,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:07:34,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:34,103 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 04:07:34,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:34,167 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 04:07:34,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [478841511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:34,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575162491] [2022-11-03 04:07:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:34,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:34,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:34,175 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:34,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 04:07:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:35,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:07:35,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:36,146 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 04:07:36,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:36,622 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 04:07:36,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575162491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:36,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:36,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 12 [2022-11-03 04:07:36,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619376768] [2022-11-03 04:07:36,623 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:36,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 04:07:36,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:36,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 04:07:36,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:07:36,626 INFO L87 Difference]: Start difference. First operand 330 states and 405 transitions. Second operand has 12 states, 12 states have (on average 29.416666666666668) internal successors, (353), 12 states have internal predecessors, (353), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 04:07:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:38,531 INFO L93 Difference]: Finished difference Result 1011 states and 1282 transitions. [2022-11-03 04:07:38,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 04:07:38,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 29.416666666666668) internal successors, (353), 12 states have internal predecessors, (353), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 142 [2022-11-03 04:07:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:38,536 INFO L225 Difference]: With dead ends: 1011 [2022-11-03 04:07:38,536 INFO L226 Difference]: Without dead ends: 728 [2022-11-03 04:07:38,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 837 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:07:38,538 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 973 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 2731 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:38,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 2731 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 04:07:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-03 04:07:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2022-11-03 04:07:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 687 states have (on average 1.1892285298398835) internal successors, (817), 698 states have internal predecessors, (817), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (42), 25 states have call predecessors, (42), 34 states have call successors, (42) [2022-11-03 04:07:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 893 transitions. [2022-11-03 04:07:38,586 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 893 transitions. Word has length 142 [2022-11-03 04:07:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:38,587 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 893 transitions. [2022-11-03 04:07:38,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.416666666666668) internal successors, (353), 12 states have internal predecessors, (353), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 04:07:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 893 transitions. [2022-11-03 04:07:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-11-03 04:07:38,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:38,597 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:38,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:38,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:39,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:39,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:39,220 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:39,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:39,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1193945768, now seen corresponding path program 1 times [2022-11-03 04:07:39,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:39,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844965581] [2022-11-03 04:07:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:39,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:39,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:39,224 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:39,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 04:07:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:49,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:07:49,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:49,404 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 04:07:49,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:49,718 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 04:07:49,718 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844965581] [2022-11-03 04:07:49,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844965581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [878762651] [2022-11-03 04:07:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:49,719 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:49,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:49,724 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:49,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 04:08:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:01,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:08:01,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:01,528 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 04:08:01,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:01,658 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 04:08:01,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [878762651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:01,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77224888] [2022-11-03 04:08:01,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:01,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:01,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:01,660 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:01,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 04:08:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:11,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:08:11,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:11,421 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 04:08:11,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:11,675 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 04:08:11,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77224888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:11,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:11,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2022-11-03 04:08:11,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321003528] [2022-11-03 04:08:11,676 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:11,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 04:08:11,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:11,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 04:08:11,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:08:11,679 INFO L87 Difference]: Start difference. First operand 726 states and 893 transitions. Second operand has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 04:08:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:13,555 INFO L93 Difference]: Finished difference Result 1431 states and 1853 transitions. [2022-11-03 04:08:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 04:08:13,557 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 444 [2022-11-03 04:08:13,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:13,560 INFO L225 Difference]: With dead ends: 1431 [2022-11-03 04:08:13,560 INFO L226 Difference]: Without dead ends: 746 [2022-11-03 04:08:13,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2683 GetRequests, 2640 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 04:08:13,563 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 121 mSDsluCounter, 2924 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 3176 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:13,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 3176 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 04:08:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-03 04:08:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 738. [2022-11-03 04:08:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 699 states have (on average 1.1917024320457796) internal successors, (833), 710 states have internal predecessors, (833), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (42), 25 states have call predecessors, (42), 34 states have call successors, (42) [2022-11-03 04:08:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 909 transitions. [2022-11-03 04:08:13,666 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 909 transitions. Word has length 444 [2022-11-03 04:08:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:13,667 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 909 transitions. [2022-11-03 04:08:13,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 04:08:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 909 transitions. [2022-11-03 04:08:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-11-03 04:08:13,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:13,678 INFO L195 NwaCegarLoop]: trace histogram [36, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:13,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:14,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-03 04:08:14,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:14,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:14,300 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1605218728, now seen corresponding path program 2 times [2022-11-03 04:08:14,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:14,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089853382] [2022-11-03 04:08:14,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:14,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:14,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:14,303 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:14,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 04:08:25,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:25,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:25,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:08:25,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:25,831 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 04:08:25,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:26,868 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 04:08:26,868 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:26,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089853382] [2022-11-03 04:08:26,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089853382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:26,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854038955] [2022-11-03 04:08:26,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:26,870 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:26,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:26,876 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:26,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 04:08:40,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:40,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:40,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:08:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:40,729 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 04:08:40,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:40,994 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 04:08:40,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854038955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671669671] [2022-11-03 04:08:40,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:40,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:40,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:40,996 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:40,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 04:08:51,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:51,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:52,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:08:52,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:53,648 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 04:08:53,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:55,643 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 04:08:55,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671669671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:55,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:55,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 7, 7] total 36 [2022-11-03 04:08:55,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986204484] [2022-11-03 04:08:55,644 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:55,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 04:08:55,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:55,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 04:08:55,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 04:08:55,649 INFO L87 Difference]: Start difference. First operand 738 states and 909 transitions. Second operand has 36 states, 36 states have (on average 27.77777777777778) internal successors, (1000), 36 states have internal predecessors, (1000), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 04:09:18,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:18,801 INFO L93 Difference]: Finished difference Result 2486 states and 3329 transitions. [2022-11-03 04:09:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 04:09:18,802 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 27.77777777777778) internal successors, (1000), 36 states have internal predecessors, (1000), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 468 [2022-11-03 04:09:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:18,813 INFO L225 Difference]: With dead ends: 2486 [2022-11-03 04:09:18,813 INFO L226 Difference]: Without dead ends: 1791 [2022-11-03 04:09:18,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2841 GetRequests, 2772 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1091, Invalid=3879, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 04:09:18,818 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 2936 mSDsluCounter, 17122 mSDsCounter, 0 mSdLazyCounter, 4965 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3088 SdHoareTripleChecker+Valid, 18146 SdHoareTripleChecker+Invalid, 5930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 4965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:18,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3088 Valid, 18146 Invalid, 5930 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [965 Valid, 4965 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2022-11-03 04:09:18,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2022-11-03 04:09:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1773. [2022-11-03 04:09:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1698 states have (on average 1.17962308598351) internal successors, (2003), 1709 states have internal predecessors, (2003), 70 states have call successors, (70), 3 states have call predecessors, (70), 4 states have return successors, (90), 61 states have call predecessors, (90), 70 states have call successors, (90) [2022-11-03 04:09:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2163 transitions. [2022-11-03 04:09:18,946 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2163 transitions. Word has length 468 [2022-11-03 04:09:18,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:18,946 INFO L495 AbstractCegarLoop]: Abstraction has 1773 states and 2163 transitions. [2022-11-03 04:09:18,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 27.77777777777778) internal successors, (1000), 36 states have internal predecessors, (1000), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 04:09:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2163 transitions. [2022-11-03 04:09:18,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1087 [2022-11-03 04:09:18,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:18,997 INFO L195 NwaCegarLoop]: trace histogram [66, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:09:19,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:09:19,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:09:19,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-03 04:09:19,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:09:19,598 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:19,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:19,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1111616016, now seen corresponding path program 3 times [2022-11-03 04:09:19,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:09:19,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757834081] [2022-11-03 04:09:19,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:09:19,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:09:19,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:09:19,607 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:09:19,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978a50a7-03d5-40e0-80ca-d6e6b4f81c5d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process