./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.2.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/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_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9d60a55b16f5ad6b3999f33f18024cdbc3b20d355c20d37aa6c15f3ec14dde93 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:39:15,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:39:15,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:39:15,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:39:15,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:39:15,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:39:15,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:39:15,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:39:15,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:39:15,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:39:15,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:39:15,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:39:15,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:39:15,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:39:15,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:39:15,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:39:15,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:39:15,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:39:15,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:39:15,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:39:15,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:39:15,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:39:15,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:39:15,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:39:16,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:39:16,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:39:16,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:39:16,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:39:16,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:39:16,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:39:16,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:39:16,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:39:16,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:39:16,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:39:16,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:39:16,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:39:16,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:39:16,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:39:16,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:39:16,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:39:16,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:39:16,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:39:16,065 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:39:16,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:39:16,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:39:16,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:39:16,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:39:16,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:39:16,068 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:39:16,069 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:39:16,069 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:39:16,069 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:39:16,071 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:39:16,071 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:39:16,071 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:39:16,071 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:39:16,072 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:39:16,072 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:39:16,072 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:39:16,073 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:39:16,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:39:16,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:39:16,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:39:16,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:39:16,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:39:16,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:39:16,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:39:16,077 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:39:16,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:39:16,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:39:16,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:39:16,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:16,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:39:16,079 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:39:16,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:39:16,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:39:16,080 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:39:16,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:39:16,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:39:16,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:39:16,081 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_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d60a55b16f5ad6b3999f33f18024cdbc3b20d355c20d37aa6c15f3ec14dde93 [2022-11-03 01:39:16,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:39:16,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:39:16,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:39:16,471 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:39:16,472 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:39:16,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.2.prop1-func-interl.c [2022-11-03 01:39:16,554 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/data/307236413/bd83313528354583b63df3e7683a34f5/FLAG2e21ef878 [2022-11-03 01:39:17,275 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:39:17,277 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.2.prop1-func-interl.c [2022-11-03 01:39:17,301 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/data/307236413/bd83313528354583b63df3e7683a34f5/FLAG2e21ef878 [2022-11-03 01:39:17,440 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/data/307236413/bd83313528354583b63df3e7683a34f5 [2022-11-03 01:39:17,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:39:17,445 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:39:17,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:17,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:39:17,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:39:17,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:17" (1/1) ... [2022-11-03 01:39:17,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a469e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:17, skipping insertion in model container [2022-11-03 01:39:17,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:17" (1/1) ... [2022-11-03 01:39:17,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:39:17,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:39:17,815 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_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.2.prop1-func-interl.c[1014,1027] [2022-11-03 01:39:18,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:18,307 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:39:18,319 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_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.2.prop1-func-interl.c[1014,1027] [2022-11-03 01:39:18,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:18,491 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:39:18,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18 WrapperNode [2022-11-03 01:39:18,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:18,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:18,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:39:18,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:39:18,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18" (1/1) ... [2022-11-03 01:39:18,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18" (1/1) ... [2022-11-03 01:39:18,990 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2485 [2022-11-03 01:39:18,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:18,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:39:18,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:39:18,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:39:19,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18" (1/1) ... [2022-11-03 01:39:19,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18" (1/1) ... [2022-11-03 01:39:19,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18" (1/1) ... [2022-11-03 01:39:19,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18" (1/1) ... [2022-11-03 01:39:19,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18" (1/1) ... [2022-11-03 01:39:19,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18" (1/1) ... [2022-11-03 01:39:19,253 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18" (1/1) ... [2022-11-03 01:39:19,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18" (1/1) ... [2022-11-03 01:39:19,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:39:19,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:39:19,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:39:19,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:39:19,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18" (1/1) ... [2022-11-03 01:39:19,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:19,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:19,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:39:19,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:39:19,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:39:19,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:39:20,059 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:39:20,061 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:41:30,544 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:42:02,655 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:42:02,655 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:42:02,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:02 BoogieIcfgContainer [2022-11-03 01:42:02,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:42:02,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:42:02,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:42:02,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:42:02,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:39:17" (1/3) ... [2022-11-03 01:42:02,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b508c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:02, skipping insertion in model container [2022-11-03 01:42:02,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:18" (2/3) ... [2022-11-03 01:42:02,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b508c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:02, skipping insertion in model container [2022-11-03 01:42:02,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:02" (3/3) ... [2022-11-03 01:42:02,670 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lamport.2.prop1-func-interl.c [2022-11-03 01:42:02,691 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:42:02,691 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:42:02,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:42:02,762 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;@741baff9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:42:02,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:42:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:42:02,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:02,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:42:02,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:02,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash 10962256, now seen corresponding path program 1 times [2022-11-03 01:42:02,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:02,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079575764] [2022-11-03 01:42:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:02,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:42:03,574 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:42:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:42:03,903 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:42:03,905 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:42:03,906 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:42:03,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:42:03,914 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:42:03,919 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:42:03,967 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 01:42:03,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:42:03 BoogieIcfgContainer [2022-11-03 01:42:03,992 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:42:03,995 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:42:03,995 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:42:03,995 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:42:03,997 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:02" (3/4) ... [2022-11-03 01:42:04,001 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:42:04,002 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:42:04,004 INFO L158 Benchmark]: Toolchain (without parser) took 166558.02ms. Allocated memory was 111.1MB in the beginning and 5.9GB in the end (delta: 5.7GB). Free memory was 70.2MB in the beginning and 4.5GB in the end (delta: -4.5GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2022-11-03 01:42:04,005 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 111.1MB. Free memory is still 90.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:42:04,006 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1044.20ms. Allocated memory is still 111.1MB. Free memory was 70.0MB in the beginning and 48.9MB in the end (delta: 21.1MB). Peak memory consumption was 25.3MB. Max. memory is 16.1GB. [2022-11-03 01:42:04,007 INFO L158 Benchmark]: Boogie Procedure Inliner took 497.72ms. Allocated memory was 111.1MB in the beginning and 163.6MB in the end (delta: 52.4MB). Free memory was 48.9MB in the beginning and 88.0MB in the end (delta: -39.1MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. [2022-11-03 01:42:04,013 INFO L158 Benchmark]: Boogie Preprocessor took 412.72ms. Allocated memory is still 163.6MB. Free memory was 88.0MB in the beginning and 80.0MB in the end (delta: 8.0MB). Peak memory consumption was 40.1MB. Max. memory is 16.1GB. [2022-11-03 01:42:04,014 INFO L158 Benchmark]: RCFGBuilder took 163253.55ms. Allocated memory was 163.6MB in the beginning and 5.9GB in the end (delta: 5.7GB). Free memory was 80.0MB in the beginning and 4.6GB in the end (delta: -4.5GB). Peak memory consumption was 3.5GB. Max. memory is 16.1GB. [2022-11-03 01:42:04,017 INFO L158 Benchmark]: TraceAbstraction took 1332.29ms. Allocated memory is still 5.9GB. Free memory was 4.6GB in the beginning and 4.5GB in the end (delta: 93.3MB). Peak memory consumption was 94.4MB. Max. memory is 16.1GB. [2022-11-03 01:42:04,017 INFO L158 Benchmark]: Witness Printer took 6.80ms. Allocated memory is still 5.9GB. Free memory was 4.5GB in the beginning and 4.5GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:42:04,022 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 111.1MB. Free memory is still 90.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1044.20ms. Allocated memory is still 111.1MB. Free memory was 70.0MB in the beginning and 48.9MB in the end (delta: 21.1MB). Peak memory consumption was 25.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 497.72ms. Allocated memory was 111.1MB in the beginning and 163.6MB in the end (delta: 52.4MB). Free memory was 48.9MB in the beginning and 88.0MB in the end (delta: -39.1MB). Peak memory consumption was 46.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 412.72ms. Allocated memory is still 163.6MB. Free memory was 88.0MB in the beginning and 80.0MB in the end (delta: 8.0MB). Peak memory consumption was 40.1MB. Max. memory is 16.1GB. * RCFGBuilder took 163253.55ms. Allocated memory was 163.6MB in the beginning and 5.9GB in the end (delta: 5.7GB). Free memory was 80.0MB in the beginning and 4.6GB in the end (delta: -4.5GB). Peak memory consumption was 3.5GB. Max. memory is 16.1GB. * TraceAbstraction took 1332.29ms. Allocated memory is still 5.9GB. Free memory was 4.6GB in the beginning and 4.5GB in the end (delta: 93.3MB). Peak memory consumption was 94.4MB. Max. memory is 16.1GB. * Witness Printer took 6.80ms. Allocated memory is still 5.9GB. Free memory was 4.5GB in the beginning and 4.5GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 299, overapproximation of bitwiseAnd at line 215. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_22 = 0; [L39] const SORT_4 var_85 = 1; [L40] const SORT_4 var_86 = 0; [L41] const SORT_2 var_95 = 0; [L42] const SORT_2 var_96 = 255; [L43] const SORT_2 var_108 = 1; [L44] const SORT_2 var_132 = 2; [L45] const SORT_3 var_169 = 0; [L46] const SORT_4 var_337 = 3; [L47] const SORT_2 var_348 = 3; [L49] SORT_1 input_99; [L50] SORT_1 input_101; [L51] SORT_1 input_103; [L52] SORT_1 input_104; [L53] SORT_1 input_105; [L54] SORT_1 input_107; [L55] SORT_1 input_118; [L56] SORT_1 input_119; [L57] SORT_1 input_121; [L58] SORT_1 input_130; [L59] SORT_1 input_131; [L60] SORT_1 input_135; [L61] SORT_1 input_145; [L62] SORT_1 input_146; [L63] SORT_1 input_147; [L64] SORT_1 input_153; [L65] SORT_1 input_154; [L66] SORT_1 input_155; [L67] SORT_1 input_156; [L68] SORT_1 input_157; [L69] SORT_1 input_158; [L70] SORT_1 input_168; [L71] SORT_1 input_176; [L72] SORT_1 input_183; [L73] SORT_1 input_191; [L74] SORT_1 input_193; [L75] SORT_1 input_197; [L76] SORT_1 input_199; [L77] SORT_1 input_208; [L78] SORT_1 input_222; [L79] SORT_1 input_233; [L80] SORT_1 input_235; [L81] SORT_1 input_239; [L82] SORT_1 input_241; [L83] SORT_1 input_250; [L84] SORT_1 input_264; [L85] SORT_1 input_275; [L86] SORT_1 input_277; [L87] SORT_1 input_281; [L88] SORT_1 input_283; [L89] SORT_1 input_292; [L90] SORT_1 input_306; [L92] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L93] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L94] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L95] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L96] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L97] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L98] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L99] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L100] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L101] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L102] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L103] SORT_1 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L104] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L105] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L106] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L107] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L108] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L109] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L110] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L111] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L112] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L113] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L114] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L115] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L116] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L117] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L118] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L119] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L120] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L121] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L122] SORT_1 state_67 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L123] SORT_1 state_69 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L124] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L125] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L126] SORT_1 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L127] SORT_1 state_77 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L128] SORT_1 state_79 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L129] SORT_1 state_81 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L130] SORT_1 state_83 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L132] SORT_2 init_7_arg_1 = var_5; [L133] state_6 = init_7_arg_1 [L134] SORT_2 init_9_arg_1 = var_5; [L135] state_8 = init_9_arg_1 [L136] SORT_2 init_11_arg_1 = var_5; [L137] state_10 = init_11_arg_1 [L138] SORT_2 init_13_arg_1 = var_5; [L139] state_12 = init_13_arg_1 [L140] SORT_2 init_15_arg_1 = var_5; [L141] state_14 = init_15_arg_1 [L142] SORT_2 init_17_arg_1 = var_5; [L143] state_16 = init_17_arg_1 [L144] SORT_2 init_19_arg_1 = var_5; [L145] state_18 = init_19_arg_1 [L146] SORT_2 init_21_arg_1 = var_5; [L147] state_20 = init_21_arg_1 [L148] SORT_1 init_24_arg_1 = var_22; [L149] state_23 = init_24_arg_1 [L150] SORT_1 init_26_arg_1 = var_22; [L151] state_25 = init_26_arg_1 [L152] SORT_1 init_28_arg_1 = var_22; [L153] state_27 = init_28_arg_1 [L154] SORT_1 init_30_arg_1 = var_22; [L155] state_29 = init_30_arg_1 [L156] SORT_1 init_32_arg_1 = var_22; [L157] state_31 = init_32_arg_1 [L158] SORT_1 init_34_arg_1 = var_22; [L159] state_33 = init_34_arg_1 [L160] SORT_1 init_36_arg_1 = var_22; [L161] state_35 = init_36_arg_1 [L162] SORT_1 init_38_arg_1 = var_22; [L163] state_37 = init_38_arg_1 [L164] SORT_1 init_40_arg_1 = var_22; [L165] state_39 = init_40_arg_1 [L166] SORT_1 init_42_arg_1 = var_22; [L167] state_41 = init_42_arg_1 [L168] SORT_1 init_44_arg_1 = var_22; [L169] state_43 = init_44_arg_1 [L170] SORT_1 init_46_arg_1 = var_22; [L171] state_45 = init_46_arg_1 [L172] SORT_1 init_48_arg_1 = var_22; [L173] state_47 = init_48_arg_1 [L174] SORT_1 init_50_arg_1 = var_22; [L175] state_49 = init_50_arg_1 [L176] SORT_1 init_52_arg_1 = var_22; [L177] state_51 = init_52_arg_1 [L178] SORT_1 init_54_arg_1 = var_22; [L179] state_53 = init_54_arg_1 [L180] SORT_1 init_56_arg_1 = var_22; [L181] state_55 = init_56_arg_1 [L182] SORT_1 init_58_arg_1 = var_22; [L183] state_57 = init_58_arg_1 [L184] SORT_1 init_60_arg_1 = var_22; [L185] state_59 = init_60_arg_1 [L186] SORT_1 init_62_arg_1 = var_22; [L187] state_61 = init_62_arg_1 [L188] SORT_1 init_64_arg_1 = var_22; [L189] state_63 = init_64_arg_1 [L190] SORT_1 init_66_arg_1 = var_22; [L191] state_65 = init_66_arg_1 [L192] SORT_1 init_68_arg_1 = var_22; [L193] state_67 = init_68_arg_1 [L194] SORT_1 init_70_arg_1 = var_22; [L195] state_69 = init_70_arg_1 [L196] SORT_1 init_72_arg_1 = var_22; [L197] state_71 = init_72_arg_1 [L198] SORT_1 init_74_arg_1 = var_22; [L199] state_73 = init_74_arg_1 [L200] SORT_1 init_76_arg_1 = var_22; [L201] state_75 = init_76_arg_1 [L202] SORT_1 init_78_arg_1 = var_22; [L203] state_77 = init_78_arg_1 [L204] SORT_1 init_80_arg_1 = var_22; [L205] state_79 = init_80_arg_1 [L206] SORT_1 init_82_arg_1 = var_22; [L207] state_81 = init_82_arg_1 [L208] SORT_1 init_84_arg_1 = var_22; [L209] state_83 = init_84_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_30_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_64_arg_1=0, init_66_arg_1=0, init_68_arg_1=0, init_70_arg_1=0, init_72_arg_1=0, init_74_arg_1=0, init_76_arg_1=0, init_78_arg_1=0, init_7_arg_1=0, init_80_arg_1=0, init_82_arg_1=0, init_84_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_23=0, state_25=0, state_27=0, state_29=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_59=0, state_6=0, state_61=0, state_63=0, state_65=0, state_67=0, state_69=0, state_71=0, state_73=0, state_75=0, state_77=0, state_79=0, state_8=0, state_81=0, state_83=0, var_108=1, var_132=2, var_169=0, var_22=0, var_337=3, var_348=3, var_5=0, var_85=1, var_86=0, var_95=0, var_96=255] [L212] input_99 = __VERIFIER_nondet_uchar() [L213] input_101 = __VERIFIER_nondet_uchar() [L214] input_103 = __VERIFIER_nondet_uchar() [L215] input_103 = input_103 & mask_SORT_1 [L216] input_104 = __VERIFIER_nondet_uchar() [L217] input_104 = input_104 & mask_SORT_1 [L218] input_105 = __VERIFIER_nondet_uchar() [L219] input_107 = __VERIFIER_nondet_uchar() [L220] input_107 = input_107 & mask_SORT_1 [L221] input_118 = __VERIFIER_nondet_uchar() [L222] input_118 = input_118 & mask_SORT_1 [L223] input_119 = __VERIFIER_nondet_uchar() [L224] input_119 = input_119 & mask_SORT_1 [L225] input_121 = __VERIFIER_nondet_uchar() [L226] input_121 = input_121 & mask_SORT_1 [L227] input_130 = __VERIFIER_nondet_uchar() [L228] input_130 = input_130 & mask_SORT_1 [L229] input_131 = __VERIFIER_nondet_uchar() [L230] input_131 = input_131 & mask_SORT_1 [L231] input_135 = __VERIFIER_nondet_uchar() [L232] input_135 = input_135 & mask_SORT_1 [L233] input_145 = __VERIFIER_nondet_uchar() [L234] input_145 = input_145 & mask_SORT_1 [L235] input_146 = __VERIFIER_nondet_uchar() [L236] input_146 = input_146 & mask_SORT_1 [L237] input_147 = __VERIFIER_nondet_uchar() [L238] input_147 = input_147 & mask_SORT_1 [L239] input_153 = __VERIFIER_nondet_uchar() [L240] input_153 = input_153 & mask_SORT_1 [L241] input_154 = __VERIFIER_nondet_uchar() [L242] input_154 = input_154 & mask_SORT_1 [L243] input_155 = __VERIFIER_nondet_uchar() [L244] input_155 = input_155 & mask_SORT_1 [L245] input_156 = __VERIFIER_nondet_uchar() [L246] input_156 = input_156 & mask_SORT_1 [L247] input_157 = __VERIFIER_nondet_uchar() [L248] input_157 = input_157 & mask_SORT_1 [L249] input_158 = __VERIFIER_nondet_uchar() [L250] input_158 = input_158 & mask_SORT_1 [L251] input_168 = __VERIFIER_nondet_uchar() [L252] input_168 = input_168 & mask_SORT_1 [L253] input_176 = __VERIFIER_nondet_uchar() [L254] input_176 = input_176 & mask_SORT_1 [L255] input_183 = __VERIFIER_nondet_uchar() [L256] input_183 = input_183 & mask_SORT_1 [L257] input_191 = __VERIFIER_nondet_uchar() [L258] input_193 = __VERIFIER_nondet_uchar() [L259] input_197 = __VERIFIER_nondet_uchar() [L260] input_199 = __VERIFIER_nondet_uchar() [L261] input_208 = __VERIFIER_nondet_uchar() [L262] input_222 = __VERIFIER_nondet_uchar() [L263] input_233 = __VERIFIER_nondet_uchar() [L264] input_235 = __VERIFIER_nondet_uchar() [L265] input_239 = __VERIFIER_nondet_uchar() [L266] input_241 = __VERIFIER_nondet_uchar() [L267] input_250 = __VERIFIER_nondet_uchar() [L268] input_264 = __VERIFIER_nondet_uchar() [L269] input_275 = __VERIFIER_nondet_uchar() [L270] input_277 = __VERIFIER_nondet_uchar() [L271] input_281 = __VERIFIER_nondet_uchar() [L272] input_283 = __VERIFIER_nondet_uchar() [L273] input_292 = __VERIFIER_nondet_uchar() [L274] input_306 = __VERIFIER_nondet_uchar() [L277] SORT_1 var_87_arg_0 = state_25; [L278] SORT_4 var_87_arg_1 = var_85; [L279] SORT_4 var_87_arg_2 = var_86; [L280] EXPR var_87_arg_0 ? var_87_arg_1 : var_87_arg_2 [L280] SORT_4 var_87 = var_87_arg_0 ? var_87_arg_1 : var_87_arg_2; [L281] SORT_1 var_88_arg_0 = state_45; [L282] SORT_4 var_88_arg_1 = var_85; [L283] SORT_4 var_88_arg_2 = var_86; [L284] EXPR var_88_arg_0 ? var_88_arg_1 : var_88_arg_2 [L284] SORT_4 var_88 = var_88_arg_0 ? var_88_arg_1 : var_88_arg_2; [L285] SORT_4 var_89_arg_0 = var_87; [L286] SORT_4 var_89_arg_1 = var_88; [L287] SORT_4 var_89 = var_89_arg_0 + var_89_arg_1; [L288] SORT_1 var_90_arg_0 = state_65; [L289] SORT_4 var_90_arg_1 = var_85; [L290] SORT_4 var_90_arg_2 = var_86; [L291] EXPR var_90_arg_0 ? var_90_arg_1 : var_90_arg_2 [L291] SORT_4 var_90 = var_90_arg_0 ? var_90_arg_1 : var_90_arg_2; [L292] SORT_4 var_91_arg_0 = var_89; [L293] SORT_4 var_91_arg_1 = var_90; [L294] SORT_4 var_91 = var_91_arg_0 + var_91_arg_1; [L295] var_91 = var_91 & mask_SORT_4 [L296] SORT_4 var_92_arg_0 = var_91; [L297] SORT_4 var_92_arg_1 = var_85; [L298] SORT_1 var_92 = var_92_arg_0 <= var_92_arg_1; [L299] SORT_1 var_93_arg_0 = ~state_83; [L300] var_93_arg_0 = var_93_arg_0 & mask_SORT_1 [L301] SORT_1 var_93_arg_1 = ~var_92; [L302] var_93_arg_1 = var_93_arg_1 & mask_SORT_1 [L303] SORT_1 var_93 = var_93_arg_0 & var_93_arg_1; [L304] var_93 = var_93 & mask_SORT_1 [L305] SORT_1 bad_94_arg_0 = var_93; [L306] CALL __VERIFIER_assert(!(bad_94_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 01:42:04,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/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_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/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_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9d60a55b16f5ad6b3999f33f18024cdbc3b20d355c20d37aa6c15f3ec14dde93 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:42:06,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:42:06,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:42:06,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:42:06,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:42:06,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:42:06,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:42:06,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:42:06,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:42:06,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:42:06,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:42:06,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:42:06,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:42:06,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:42:06,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:42:07,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:42:07,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:42:07,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:42:07,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:42:07,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:42:07,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:42:07,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:42:07,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:42:07,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:42:07,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:42:07,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:42:07,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:42:07,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:42:07,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:42:07,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:42:07,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:42:07,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:42:07,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:42:07,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:42:07,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:42:07,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:42:07,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:42:07,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:42:07,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:42:07,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:42:07,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:42:07,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:42:07,107 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:42:07,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:42:07,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:42:07,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:42:07,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:42:07,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:42:07,111 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:42:07,111 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:42:07,112 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:42:07,112 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:42:07,113 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:42:07,113 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:42:07,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:42:07,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:42:07,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:42:07,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:42:07,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:42:07,116 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:42:07,116 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:42:07,117 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:42:07,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:42:07,117 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:42:07,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:42:07,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:42:07,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:42:07,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:42:07,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:42:07,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:42:07,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:42:07,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:42:07,119 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:42:07,120 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:07,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:42:07,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:42:07,121 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:42:07,121 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_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d60a55b16f5ad6b3999f33f18024cdbc3b20d355c20d37aa6c15f3ec14dde93 [2022-11-03 01:42:07,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:42:07,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:42:07,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:42:07,559 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:42:07,560 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:42:07,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.2.prop1-func-interl.c [2022-11-03 01:42:07,651 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/data/62e7f6fe5/5bf33241acbd43d4b9ab933d38ab02b2/FLAG0c65651ff [2022-11-03 01:42:08,422 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:42:08,429 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.2.prop1-func-interl.c [2022-11-03 01:42:08,454 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/data/62e7f6fe5/5bf33241acbd43d4b9ab933d38ab02b2/FLAG0c65651ff [2022-11-03 01:42:08,651 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/data/62e7f6fe5/5bf33241acbd43d4b9ab933d38ab02b2 [2022-11-03 01:42:08,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:42:08,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:42:08,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:42:08,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:42:08,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:42:08,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:42:08" (1/1) ... [2022-11-03 01:42:08,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d793530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:08, skipping insertion in model container [2022-11-03 01:42:08,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:42:08" (1/1) ... [2022-11-03 01:42:08,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:42:08,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:42:08,973 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_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.2.prop1-func-interl.c[1014,1027] [2022-11-03 01:42:09,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:42:09,504 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:42:09,514 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_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.2.prop1-func-interl.c[1014,1027] [2022-11-03 01:42:09,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:42:09,687 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:42:09,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09 WrapperNode [2022-11-03 01:42:09,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:42:09,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:42:09,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:42:09,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:42:09,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09" (1/1) ... [2022-11-03 01:42:09,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09" (1/1) ... [2022-11-03 01:42:09,931 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2485 [2022-11-03 01:42:09,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:42:09,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:42:09,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:42:09,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:42:09,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09" (1/1) ... [2022-11-03 01:42:09,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09" (1/1) ... [2022-11-03 01:42:09,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09" (1/1) ... [2022-11-03 01:42:09,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09" (1/1) ... [2022-11-03 01:42:10,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09" (1/1) ... [2022-11-03 01:42:10,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09" (1/1) ... [2022-11-03 01:42:10,067 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09" (1/1) ... [2022-11-03 01:42:10,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09" (1/1) ... [2022-11-03 01:42:10,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:42:10,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:42:10,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:42:10,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:42:10,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09" (1/1) ... [2022-11-03 01:42:10,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:42:10,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:10,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:42:10,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:42:10,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:42:10,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:42:10,971 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:42:10,974 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:42:13,474 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:42:13,482 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:42:13,483 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:42:13,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:13 BoogieIcfgContainer [2022-11-03 01:42:13,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:42:13,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:42:13,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:42:13,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:42:13,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:42:08" (1/3) ... [2022-11-03 01:42:13,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f91b4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:13, skipping insertion in model container [2022-11-03 01:42:13,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:09" (2/3) ... [2022-11-03 01:42:13,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f91b4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:13, skipping insertion in model container [2022-11-03 01:42:13,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:13" (3/3) ... [2022-11-03 01:42:13,494 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lamport.2.prop1-func-interl.c [2022-11-03 01:42:13,515 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:42:13,515 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:42:13,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:42:13,579 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;@54058ddf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:42:13,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:42:13,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 93 states have (on average 1.4946236559139785) internal successors, (139), 94 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:13,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:42:13,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:13,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:13,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:13,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:13,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1473645707, now seen corresponding path program 1 times [2022-11-03 01:42:13,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:13,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832343085] [2022-11-03 01:42:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:13,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:13,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:13,620 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:13,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:42:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:14,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:42:14,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:14,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:14,342 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:14,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832343085] [2022-11-03 01:42:14,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832343085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:14,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:14,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:42:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120814207] [2022-11-03 01:42:14,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:14,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:14,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:14,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:42:14,394 INFO L87 Difference]: Start difference. First operand has 95 states, 93 states have (on average 1.4946236559139785) internal successors, (139), 94 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:14,757 INFO L93 Difference]: Finished difference Result 361 states and 539 transitions. [2022-11-03 01:42:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:14,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 01:42:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:14,780 INFO L225 Difference]: With dead ends: 361 [2022-11-03 01:42:14,782 INFO L226 Difference]: Without dead ends: 268 [2022-11-03 01:42:14,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:14,798 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 385 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:14,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 511 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:42:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-03 01:42:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 93. [2022-11-03 01:42:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 135 transitions. [2022-11-03 01:42:14,878 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 135 transitions. Word has length 11 [2022-11-03 01:42:14,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:14,879 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 135 transitions. [2022-11-03 01:42:14,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 135 transitions. [2022-11-03 01:42:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:42:14,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:14,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:14,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 01:42:15,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:15,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2011974963, now seen corresponding path program 1 times [2022-11-03 01:42:15,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:15,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959036599] [2022-11-03 01:42:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:15,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:15,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:15,105 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:15,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:42:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:15,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:42:15,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:15,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:15,733 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:15,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959036599] [2022-11-03 01:42:15,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959036599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:15,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:15,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:42:15,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068219993] [2022-11-03 01:42:15,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:15,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:15,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:42:15,744 INFO L87 Difference]: Start difference. First operand 93 states and 135 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:16,043 INFO L93 Difference]: Finished difference Result 357 states and 523 transitions. [2022-11-03 01:42:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:16,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 01:42:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:16,048 INFO L225 Difference]: With dead ends: 357 [2022-11-03 01:42:16,049 INFO L226 Difference]: Without dead ends: 268 [2022-11-03 01:42:16,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:16,050 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 379 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:16,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 510 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:42:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-03 01:42:16,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 95. [2022-11-03 01:42:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.4574468085106382) internal successors, (137), 94 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:16,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 137 transitions. [2022-11-03 01:42:16,064 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 137 transitions. Word has length 11 [2022-11-03 01:42:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:16,065 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 137 transitions. [2022-11-03 01:42:16,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:16,065 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 137 transitions. [2022-11-03 01:42:16,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:42:16,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:16,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:16,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:16,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:16,267 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:16,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:16,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2069233265, now seen corresponding path program 1 times [2022-11-03 01:42:16,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:16,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294263446] [2022-11-03 01:42:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:16,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:16,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:16,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:16,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:42:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:16,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:42:16,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:16,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:16,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:16,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294263446] [2022-11-03 01:42:16,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294263446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:16,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:16,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:42:16,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514230635] [2022-11-03 01:42:16,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:16,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:16,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:16,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:42:16,841 INFO L87 Difference]: Start difference. First operand 95 states and 137 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:17,089 INFO L93 Difference]: Finished difference Result 357 states and 522 transitions. [2022-11-03 01:42:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 01:42:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:17,095 INFO L225 Difference]: With dead ends: 357 [2022-11-03 01:42:17,095 INFO L226 Difference]: Without dead ends: 268 [2022-11-03 01:42:17,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:17,097 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 373 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:17,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 512 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:42:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-03 01:42:17,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 97. [2022-11-03 01:42:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.4479166666666667) internal successors, (139), 96 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2022-11-03 01:42:17,108 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 11 [2022-11-03 01:42:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:17,109 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2022-11-03 01:42:17,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2022-11-03 01:42:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:42:17,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:17,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:17,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:17,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:17,325 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:17,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2069292847, now seen corresponding path program 1 times [2022-11-03 01:42:17,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:17,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596984221] [2022-11-03 01:42:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:17,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:17,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:17,333 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:17,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:42:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:17,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 01:42:17,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:18,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:18,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:18,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596984221] [2022-11-03 01:42:18,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596984221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:18,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:18,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:42:18,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711428959] [2022-11-03 01:42:18,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:18,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:42:18,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:42:18,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:42:18,330 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:19,897 INFO L93 Difference]: Finished difference Result 381 states and 553 transitions. [2022-11-03 01:42:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 01:42:19,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 01:42:19,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:19,900 INFO L225 Difference]: With dead ends: 381 [2022-11-03 01:42:19,901 INFO L226 Difference]: Without dead ends: 379 [2022-11-03 01:42:19,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:42:19,902 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 1022 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:19,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 1203 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 01:42:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-03 01:42:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 103. [2022-11-03 01:42:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.4411764705882353) internal successors, (147), 102 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 147 transitions. [2022-11-03 01:42:19,919 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 147 transitions. Word has length 11 [2022-11-03 01:42:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:19,919 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 147 transitions. [2022-11-03 01:42:19,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:19,920 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 147 transitions. [2022-11-03 01:42:19,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:19,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:19,925 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] [2022-11-03 01:42:19,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:20,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:20,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1639282231, now seen corresponding path program 1 times [2022-11-03 01:42:20,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:20,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681199819] [2022-11-03 01:42:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:20,145 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:20,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:20,146 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:20,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:42:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:21,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:42:21,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:21,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:21,610 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:21,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681199819] [2022-11-03 01:42:21,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681199819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:21,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:21,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:42:21,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295416088] [2022-11-03 01:42:21,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:21,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:21,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:21,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:21,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:21,613 INFO L87 Difference]: Start difference. First operand 103 states and 147 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:22,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:22,186 INFO L93 Difference]: Finished difference Result 390 states and 565 transitions. [2022-11-03 01:42:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:42:22,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:42:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:22,191 INFO L225 Difference]: With dead ends: 390 [2022-11-03 01:42:22,191 INFO L226 Difference]: Without dead ends: 295 [2022-11-03 01:42:22,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:22,192 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 497 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:22,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 681 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:42:22,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-03 01:42:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 109. [2022-11-03 01:42:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4259259259259258) internal successors, (154), 108 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2022-11-03 01:42:22,211 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 98 [2022-11-03 01:42:22,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:22,212 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2022-11-03 01:42:22,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2022-11-03 01:42:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:22,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:22,217 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] [2022-11-03 01:42:22,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:22,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:22,433 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:22,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:22,433 INFO L85 PathProgramCache]: Analyzing trace with hash -779202247, now seen corresponding path program 1 times [2022-11-03 01:42:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:22,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91307170] [2022-11-03 01:42:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:22,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:22,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:22,438 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:22,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:42:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:23,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:42:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:23,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:23,842 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:23,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91307170] [2022-11-03 01:42:23,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91307170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:23,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:23,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:42:23,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655806753] [2022-11-03 01:42:23,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:23,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:23,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:23,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:23,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:23,846 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:24,388 INFO L93 Difference]: Finished difference Result 390 states and 564 transitions. [2022-11-03 01:42:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:42:24,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:42:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:24,394 INFO L225 Difference]: With dead ends: 390 [2022-11-03 01:42:24,394 INFO L226 Difference]: Without dead ends: 295 [2022-11-03 01:42:24,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:24,395 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 480 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:24,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 671 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:42:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-03 01:42:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 115. [2022-11-03 01:42:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4210526315789473) internal successors, (162), 114 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 162 transitions. [2022-11-03 01:42:24,404 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 162 transitions. Word has length 98 [2022-11-03 01:42:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:24,405 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 162 transitions. [2022-11-03 01:42:24,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 162 transitions. [2022-11-03 01:42:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:24,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:24,407 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] [2022-11-03 01:42:24,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:24,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:24,630 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:24,631 INFO L85 PathProgramCache]: Analyzing trace with hash -538962501, now seen corresponding path program 1 times [2022-11-03 01:42:24,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:24,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275911289] [2022-11-03 01:42:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:24,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:24,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:24,634 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:24,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:42:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:25,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:42:25,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:25,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:25,985 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:25,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275911289] [2022-11-03 01:42:25,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275911289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:25,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:25,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:42:25,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907330877] [2022-11-03 01:42:25,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:25,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:25,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:25,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:25,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:25,987 INFO L87 Difference]: Start difference. First operand 115 states and 162 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:26,631 INFO L93 Difference]: Finished difference Result 390 states and 563 transitions. [2022-11-03 01:42:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:42:26,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:42:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:26,634 INFO L225 Difference]: With dead ends: 390 [2022-11-03 01:42:26,634 INFO L226 Difference]: Without dead ends: 295 [2022-11-03 01:42:26,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:26,636 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 467 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:26,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 668 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:42:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-03 01:42:26,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 119. [2022-11-03 01:42:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.4152542372881356) internal successors, (167), 118 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 167 transitions. [2022-11-03 01:42:26,645 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 167 transitions. Word has length 98 [2022-11-03 01:42:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:26,645 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 167 transitions. [2022-11-03 01:42:26,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 167 transitions. [2022-11-03 01:42:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:26,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:26,647 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] [2022-11-03 01:42:26,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:26,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:26,869 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:26,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:26,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1195141949, now seen corresponding path program 1 times [2022-11-03 01:42:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:26,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705388576] [2022-11-03 01:42:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:26,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:26,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:26,874 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:26,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:42:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:42:27,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:28,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:28,240 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:28,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705388576] [2022-11-03 01:42:28,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705388576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:28,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:28,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:42:28,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580262449] [2022-11-03 01:42:28,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:28,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:28,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:28,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:28,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:42:28,243 INFO L87 Difference]: Start difference. First operand 119 states and 167 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:28,911 INFO L93 Difference]: Finished difference Result 402 states and 580 transitions. [2022-11-03 01:42:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:28,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:42:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:28,913 INFO L225 Difference]: With dead ends: 402 [2022-11-03 01:42:28,913 INFO L226 Difference]: Without dead ends: 307 [2022-11-03 01:42:28,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:42:28,915 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 600 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:28,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 909 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:42:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-03 01:42:28,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 123. [2022-11-03 01:42:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.4098360655737705) internal successors, (172), 122 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 172 transitions. [2022-11-03 01:42:28,923 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 172 transitions. Word has length 98 [2022-11-03 01:42:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:28,923 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 172 transitions. [2022-11-03 01:42:28,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 172 transitions. [2022-11-03 01:42:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:28,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:28,925 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] [2022-11-03 01:42:28,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:29,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:29,149 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:29,149 INFO L85 PathProgramCache]: Analyzing trace with hash 227791295, now seen corresponding path program 1 times [2022-11-03 01:42:29,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:29,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469788467] [2022-11-03 01:42:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:29,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:29,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:29,153 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:29,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:42:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:30,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:42:30,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:30,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:30,562 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:30,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469788467] [2022-11-03 01:42:30,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469788467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:30,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:30,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:42:30,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313157350] [2022-11-03 01:42:30,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:30,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:30,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:30,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:42:30,565 INFO L87 Difference]: Start difference. First operand 123 states and 172 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:31,204 INFO L93 Difference]: Finished difference Result 402 states and 579 transitions. [2022-11-03 01:42:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:31,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:42:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:31,206 INFO L225 Difference]: With dead ends: 402 [2022-11-03 01:42:31,207 INFO L226 Difference]: Without dead ends: 307 [2022-11-03 01:42:31,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:42:31,208 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 582 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:31,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 890 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:42:31,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-03 01:42:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 129. [2022-11-03 01:42:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.40625) internal successors, (180), 128 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 180 transitions. [2022-11-03 01:42:31,217 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 180 transitions. Word has length 98 [2022-11-03 01:42:31,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:31,218 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 180 transitions. [2022-11-03 01:42:31,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 180 transitions. [2022-11-03 01:42:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:31,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:31,220 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] [2022-11-03 01:42:31,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:31,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:31,433 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1458388543, now seen corresponding path program 1 times [2022-11-03 01:42:31,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:31,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167402531] [2022-11-03 01:42:31,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:31,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:31,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:31,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:31,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:42:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:32,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:42:32,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:32,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:32,789 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:32,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167402531] [2022-11-03 01:42:32,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167402531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:32,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:32,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:42:32,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071488294] [2022-11-03 01:42:32,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:32,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:32,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:32,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:32,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:32,792 INFO L87 Difference]: Start difference. First operand 129 states and 180 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:33,350 INFO L93 Difference]: Finished difference Result 390 states and 560 transitions. [2022-11-03 01:42:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:42:33,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:42:33,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:33,353 INFO L225 Difference]: With dead ends: 390 [2022-11-03 01:42:33,353 INFO L226 Difference]: Without dead ends: 295 [2022-11-03 01:42:33,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:33,354 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 431 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:33,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 658 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:42:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-03 01:42:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 131. [2022-11-03 01:42:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4) internal successors, (182), 130 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 182 transitions. [2022-11-03 01:42:33,362 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 182 transitions. Word has length 98 [2022-11-03 01:42:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:33,363 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 182 transitions. [2022-11-03 01:42:33,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 182 transitions. [2022-11-03 01:42:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:33,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:33,364 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] [2022-11-03 01:42:33,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:33,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:33,592 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:33,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1875785149, now seen corresponding path program 1 times [2022-11-03 01:42:33,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:33,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735169877] [2022-11-03 01:42:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:33,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:33,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:33,598 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:33,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:42:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:34,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:42:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:35,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:35,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:35,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735169877] [2022-11-03 01:42:35,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735169877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:35,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:35,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:42:35,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737229938] [2022-11-03 01:42:35,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:35,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:35,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:35,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:35,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:42:35,103 INFO L87 Difference]: Start difference. First operand 131 states and 182 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:35,805 INFO L93 Difference]: Finished difference Result 414 states and 595 transitions. [2022-11-03 01:42:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:35,806 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:42:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:35,808 INFO L225 Difference]: With dead ends: 414 [2022-11-03 01:42:35,808 INFO L226 Difference]: Without dead ends: 319 [2022-11-03 01:42:35,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:42:35,809 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 587 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:35,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 903 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:42:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-03 01:42:35,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 133. [2022-11-03 01:42:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.393939393939394) internal successors, (184), 132 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 184 transitions. [2022-11-03 01:42:35,817 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 184 transitions. Word has length 98 [2022-11-03 01:42:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:35,817 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 184 transitions. [2022-11-03 01:42:35,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 184 transitions. [2022-11-03 01:42:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:35,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:35,819 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] [2022-11-03 01:42:35,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:36,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:36,029 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash 85789509, now seen corresponding path program 1 times [2022-11-03 01:42:36,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:36,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770045372] [2022-11-03 01:42:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:36,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:36,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:36,032 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:36,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:42:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:42:36,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:37,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:37,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:37,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770045372] [2022-11-03 01:42:37,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770045372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:37,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:37,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:42:37,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376651516] [2022-11-03 01:42:37,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:37,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:37,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:37,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:42:37,232 INFO L87 Difference]: Start difference. First operand 133 states and 184 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:37,807 INFO L93 Difference]: Finished difference Result 414 states and 594 transitions. [2022-11-03 01:42:37,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:37,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:42:37,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:37,811 INFO L225 Difference]: With dead ends: 414 [2022-11-03 01:42:37,811 INFO L226 Difference]: Without dead ends: 319 [2022-11-03 01:42:37,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:42:37,812 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 574 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:37,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 890 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:42:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-03 01:42:37,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 137. [2022-11-03 01:42:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3897058823529411) internal successors, (189), 136 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 189 transitions. [2022-11-03 01:42:37,824 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 189 transitions. Word has length 98 [2022-11-03 01:42:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:37,825 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 189 transitions. [2022-11-03 01:42:37,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 189 transitions. [2022-11-03 01:42:37,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:37,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:37,828 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] [2022-11-03 01:42:37,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:38,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:38,041 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:38,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:38,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1346706759, now seen corresponding path program 1 times [2022-11-03 01:42:38,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:38,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773955019] [2022-11-03 01:42:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:38,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:38,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:38,045 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:38,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:42:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:38,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:42:38,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:39,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:39,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:39,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773955019] [2022-11-03 01:42:39,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773955019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:39,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:39,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:42:39,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522555466] [2022-11-03 01:42:39,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:39,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:39,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:39,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:39,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:42:39,277 INFO L87 Difference]: Start difference. First operand 137 states and 189 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:39,569 INFO L93 Difference]: Finished difference Result 373 states and 535 transitions. [2022-11-03 01:42:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:39,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:42:39,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:39,575 INFO L225 Difference]: With dead ends: 373 [2022-11-03 01:42:39,575 INFO L226 Difference]: Without dead ends: 278 [2022-11-03 01:42:39,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:39,577 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 187 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:39,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 478 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:42:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-03 01:42:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 173. [2022-11-03 01:42:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.4069767441860466) internal successors, (242), 172 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 242 transitions. [2022-11-03 01:42:39,587 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 242 transitions. Word has length 98 [2022-11-03 01:42:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:39,587 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 242 transitions. [2022-11-03 01:42:39,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 242 transitions. [2022-11-03 01:42:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:39,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:39,589 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] [2022-11-03 01:42:39,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-03 01:42:39,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:39,793 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1769408585, now seen corresponding path program 1 times [2022-11-03 01:42:39,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:39,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844702319] [2022-11-03 01:42:39,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:39,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:39,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:39,797 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:39,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:42:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:40,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:42:40,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:41,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:41,081 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:41,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844702319] [2022-11-03 01:42:41,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844702319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:41,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:41,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:42:41,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811167217] [2022-11-03 01:42:41,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:41,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:41,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:42:41,084 INFO L87 Difference]: Start difference. First operand 173 states and 242 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:41,389 INFO L93 Difference]: Finished difference Result 373 states and 534 transitions. [2022-11-03 01:42:41,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:41,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:42:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:41,392 INFO L225 Difference]: With dead ends: 373 [2022-11-03 01:42:41,393 INFO L226 Difference]: Without dead ends: 278 [2022-11-03 01:42:41,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:41,394 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 176 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:41,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 477 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:42:41,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-03 01:42:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 177. [2022-11-03 01:42:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.4034090909090908) internal successors, (247), 176 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 247 transitions. [2022-11-03 01:42:41,405 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 247 transitions. Word has length 98 [2022-11-03 01:42:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:41,405 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 247 transitions. [2022-11-03 01:42:41,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 247 transitions. [2022-11-03 01:42:41,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:41,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:41,407 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] [2022-11-03 01:42:41,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:41,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:41,629 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:41,630 INFO L85 PathProgramCache]: Analyzing trace with hash 181060683, now seen corresponding path program 1 times [2022-11-03 01:42:41,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:41,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549583802] [2022-11-03 01:42:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:41,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:41,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:41,633 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:41,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:42:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:42:42,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:43,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:44,012 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:44,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549583802] [2022-11-03 01:42:44,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549583802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:44,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [960627896] [2022-11-03 01:42:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:44,013 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:44,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:42:44,018 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:42:44,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 01:42:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:45,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:42:45,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:46,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:46,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [960627896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193862443] [2022-11-03 01:42:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:46,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:46,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:46,820 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:46,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 01:42:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:47,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:42:47,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:48,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:48,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193862443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:48,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:42:48,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 01:42:48,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423160534] [2022-11-03 01:42:48,662 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:48,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:42:48,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:48,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:42:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:42:48,665 INFO L87 Difference]: Start difference. First operand 177 states and 247 transitions. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:48,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:48,912 INFO L93 Difference]: Finished difference Result 386 states and 551 transitions. [2022-11-03 01:42:48,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:48,913 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:42:48,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:48,914 INFO L225 Difference]: With dead ends: 386 [2022-11-03 01:42:48,914 INFO L226 Difference]: Without dead ends: 291 [2022-11-03 01:42:48,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 564 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:42:48,917 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 325 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:48,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1476 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-03 01:42:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-03 01:42:48,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 212. [2022-11-03 01:42:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.4028436018957346) internal successors, (296), 211 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 296 transitions. [2022-11-03 01:42:48,931 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 296 transitions. Word has length 98 [2022-11-03 01:42:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:48,931 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 296 transitions. [2022-11-03 01:42:48,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 296 transitions. [2022-11-03 01:42:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:48,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:48,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:48,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:49,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:49,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:49,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:49,548 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:49,548 INFO L85 PathProgramCache]: Analyzing trace with hash -628285943, now seen corresponding path program 1 times [2022-11-03 01:42:49,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:49,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230342174] [2022-11-03 01:42:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:49,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:49,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:49,551 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:49,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:42:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:50,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:42:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:51,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:51,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:51,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230342174] [2022-11-03 01:42:51,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230342174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:51,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2009507932] [2022-11-03 01:42:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:51,880 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:51,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:42:51,881 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:42:51,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 01:42:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:53,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:42:53,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:54,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:54,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2009507932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:54,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093401757] [2022-11-03 01:42:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:54,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:54,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:54,549 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:54,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 01:42:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:55,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:42:55,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:55,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:56,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093401757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:56,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:42:56,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 01:42:56,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563211607] [2022-11-03 01:42:56,316 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:56,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:42:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:56,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:42:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:42:56,318 INFO L87 Difference]: Start difference. First operand 212 states and 296 transitions. Second operand has 16 states, 16 states have (on average 11.9375) internal successors, (191), 16 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:56,601 INFO L93 Difference]: Finished difference Result 446 states and 635 transitions. [2022-11-03 01:42:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:42:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.9375) internal successors, (191), 16 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:42:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:56,603 INFO L225 Difference]: With dead ends: 446 [2022-11-03 01:42:56,603 INFO L226 Difference]: Without dead ends: 351 [2022-11-03 01:42:56,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 564 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:42:56,605 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 248 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:56,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1588 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-11-03 01:42:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-03 01:42:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 278. [2022-11-03 01:42:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.3971119133574008) internal successors, (387), 277 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:56,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 387 transitions. [2022-11-03 01:42:56,618 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 387 transitions. Word has length 98 [2022-11-03 01:42:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:56,618 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 387 transitions. [2022-11-03 01:42:56,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.9375) internal successors, (191), 16 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 387 transitions. [2022-11-03 01:42:56,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:42:56,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:56,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:56,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:56,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:57,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:57,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:57,245 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:57,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:57,246 INFO L85 PathProgramCache]: Analyzing trace with hash -571027641, now seen corresponding path program 1 times [2022-11-03 01:42:57,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:57,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957636988] [2022-11-03 01:42:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:57,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:57,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:57,249 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:57,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:42:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:58,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:42:58,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:58,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:59,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:59,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957636988] [2022-11-03 01:42:59,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957636988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:59,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [442477755] [2022-11-03 01:42:59,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:59,338 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:59,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:42:59,339 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:42:59,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 01:43:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:01,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:43:01,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:01,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:01,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [442477755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:01,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608157081] [2022-11-03 01:43:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:01,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:01,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:01,966 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:01,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 01:43:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:02,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:43:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:03,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:03,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608157081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:03,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:43:03,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 01:43:03,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025615603] [2022-11-03 01:43:03,741 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:03,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:43:03,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:43:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:43:03,742 INFO L87 Difference]: Start difference. First operand 278 states and 387 transitions. Second operand has 16 states, 16 states have (on average 12.0625) internal successors, (193), 16 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:03,980 INFO L93 Difference]: Finished difference Result 564 states and 796 transitions. [2022-11-03 01:43:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:43:03,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.0625) internal successors, (193), 16 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:43:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:03,984 INFO L225 Difference]: With dead ends: 564 [2022-11-03 01:43:03,984 INFO L226 Difference]: Without dead ends: 469 [2022-11-03 01:43:03,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 564 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:43:03,985 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 361 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:03,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1585 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-11-03 01:43:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-11-03 01:43:04,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 398. [2022-11-03 01:43:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.3879093198992443) internal successors, (551), 397 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 551 transitions. [2022-11-03 01:43:04,012 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 551 transitions. Word has length 98 [2022-11-03 01:43:04,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:04,012 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 551 transitions. [2022-11-03 01:43:04,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.0625) internal successors, (193), 16 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:04,013 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 551 transitions. [2022-11-03 01:43:04,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:43:04,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:04,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:04,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:04,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:04,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:04,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:04,633 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:04,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1415033143, now seen corresponding path program 1 times [2022-11-03 01:43:04,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:04,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236275935] [2022-11-03 01:43:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:04,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:04,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:04,636 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:04,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:43:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:05,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:43:05,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:06,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:09,677 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:09,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236275935] [2022-11-03 01:43:09,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236275935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:09,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1158217564] [2022-11-03 01:43:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:09,679 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:09,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:43:09,680 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:43:09,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-03 01:43:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:11,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:43:11,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:12,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:16,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1158217564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:16,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766844770] [2022-11-03 01:43:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:16,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:16,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:16,974 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:16,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-03 01:43:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:17,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:43:17,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:19,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:22,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766844770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:22,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:43:22,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8, 8, 11, 11] total 44 [2022-11-03 01:43:22,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874839938] [2022-11-03 01:43:22,839 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:22,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 01:43:22,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:22,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 01:43:22,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1720, Unknown=1, NotChecked=0, Total=1892 [2022-11-03 01:43:22,842 INFO L87 Difference]: Start difference. First operand 398 states and 551 transitions. Second operand has 44 states, 44 states have (on average 13.045454545454545) internal successors, (574), 44 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:24,674 INFO L93 Difference]: Finished difference Result 890 states and 1249 transitions. [2022-11-03 01:43:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 01:43:24,675 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 13.045454545454545) internal successors, (574), 44 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:43:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:24,678 INFO L225 Difference]: With dead ends: 890 [2022-11-03 01:43:24,679 INFO L226 Difference]: Without dead ends: 888 [2022-11-03 01:43:24,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=468, Invalid=3821, Unknown=1, NotChecked=0, Total=4290 [2022-11-03 01:43:24,681 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 1218 mSDsluCounter, 3495 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 3679 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:24,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 3679 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 195 Unchecked, 0.1s Time] [2022-11-03 01:43:24,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-11-03 01:43:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 751. [2022-11-03 01:43:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 1.4026666666666667) internal successors, (1052), 750 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1052 transitions. [2022-11-03 01:43:24,728 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1052 transitions. Word has length 98 [2022-11-03 01:43:24,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:24,729 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 1052 transitions. [2022-11-03 01:43:24,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 13.045454545454545) internal successors, (574), 44 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1052 transitions. [2022-11-03 01:43:24,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:43:24,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:24,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:24,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:24,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:25,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-11-03 01:43:25,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:25,353 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:25,354 INFO L85 PathProgramCache]: Analyzing trace with hash -971132469, now seen corresponding path program 1 times [2022-11-03 01:43:25,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:25,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569271548] [2022-11-03 01:43:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:25,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:25,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:25,357 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:25,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:43:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:26,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:43:26,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:27,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:30,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:30,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569271548] [2022-11-03 01:43:30,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569271548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:30,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1452238642] [2022-11-03 01:43:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:30,284 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:30,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:43:30,285 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:43:30,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 01:43:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:32,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 01:43:32,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:33,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:43,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1452238642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:43,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065063164] [2022-11-03 01:43:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:43,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:43,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:43,481 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:43,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 01:43:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:44,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:43:44,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:45,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:49,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065063164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:49,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:43:49,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 01:43:49,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360928412] [2022-11-03 01:43:49,433 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:49,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:43:49,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:49,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:43:49,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2008, Unknown=2, NotChecked=0, Total=2256 [2022-11-03 01:43:49,436 INFO L87 Difference]: Start difference. First operand 751 states and 1052 transitions. Second operand has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:52,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:52,452 INFO L93 Difference]: Finished difference Result 1482 states and 2079 transitions. [2022-11-03 01:43:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:43:52,453 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:43:52,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:52,457 INFO L225 Difference]: With dead ends: 1482 [2022-11-03 01:43:52,457 INFO L226 Difference]: Without dead ends: 1480 [2022-11-03 01:43:52,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=573, Invalid=3981, Unknown=2, NotChecked=0, Total=4556 [2022-11-03 01:43:52,460 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 466 mSDsluCounter, 2504 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 2614 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:52,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 2614 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 73 Unchecked, 0.0s Time] [2022-11-03 01:43:52,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2022-11-03 01:43:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1425. [2022-11-03 01:43:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 1.4094101123595506) internal successors, (2007), 1424 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 2007 transitions. [2022-11-03 01:43:52,556 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 2007 transitions. Word has length 98 [2022-11-03 01:43:52,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:52,557 INFO L495 AbstractCegarLoop]: Abstraction has 1425 states and 2007 transitions. [2022-11-03 01:43:52,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:52,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2007 transitions. [2022-11-03 01:43:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:43:52,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:52,560 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:52,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:52,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:52,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-03 01:43:53,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:53,177 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:53,177 INFO L85 PathProgramCache]: Analyzing trace with hash -311600947, now seen corresponding path program 1 times [2022-11-03 01:43:53,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:53,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525572414] [2022-11-03 01:43:53,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:53,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:53,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:53,180 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:53,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 01:43:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:54,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:43:54,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:55,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:58,420 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:58,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525572414] [2022-11-03 01:43:58,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525572414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:58,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1789235229] [2022-11-03 01:43:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:58,420 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:58,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:43:58,421 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:43:58,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 01:44:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:00,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 01:44:00,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:02,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:15,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1789235229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:15,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578763887] [2022-11-03 01:44:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:15,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:15,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:15,435 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:15,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 01:44:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:16,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:44:16,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:44:18,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:44:22,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578763887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:22,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:44:22,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 01:44:22,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210406403] [2022-11-03 01:44:22,799 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:22,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:44:22,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:22,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:44:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2006, Unknown=4, NotChecked=0, Total=2256 [2022-11-03 01:44:22,802 INFO L87 Difference]: Start difference. First operand 1425 states and 2007 transitions. Second operand has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:27,086 INFO L93 Difference]: Finished difference Result 2792 states and 3923 transitions. [2022-11-03 01:44:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:44:27,087 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:44:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:27,094 INFO L225 Difference]: With dead ends: 2792 [2022-11-03 01:44:27,095 INFO L226 Difference]: Without dead ends: 2790 [2022-11-03 01:44:27,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=573, Invalid=3979, Unknown=4, NotChecked=0, Total=4556 [2022-11-03 01:44:27,097 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 394 mSDsluCounter, 2798 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:27,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 2908 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-11-03 01:44:27,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2022-11-03 01:44:27,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2705. [2022-11-03 01:44:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2705 states, 2704 states have (on average 1.4108727810650887) internal successors, (3815), 2704 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2705 states to 2705 states and 3815 transitions. [2022-11-03 01:44:27,291 INFO L78 Accepts]: Start accepts. Automaton has 2705 states and 3815 transitions. Word has length 98 [2022-11-03 01:44:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:27,292 INFO L495 AbstractCegarLoop]: Abstraction has 2705 states and 3815 transitions. [2022-11-03 01:44:27,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:44:27,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2705 states and 3815 transitions. [2022-11-03 01:44:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:44:27,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:27,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:27,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:27,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:27,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:27,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:27,913 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:27,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:27,914 INFO L85 PathProgramCache]: Analyzing trace with hash -664689329, now seen corresponding path program 1 times [2022-11-03 01:44:27,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:27,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107049190] [2022-11-03 01:44:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:27,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:27,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:27,917 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:27,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 01:44:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:28,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:44:28,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:44:30,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:44:33,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:33,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107049190] [2022-11-03 01:44:33,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107049190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:33,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945078785] [2022-11-03 01:44:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:33,884 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:33,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:44:33,885 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:44:33,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 01:44:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:35,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 01:44:35,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:37,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:50,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [945078785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:50,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809609445] [2022-11-03 01:44:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:50,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:50,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:50,723 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:50,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 01:44:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:51,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:44:51,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:44:53,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:44:58,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809609445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:58,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:44:58,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 01:44:58,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563596220] [2022-11-03 01:44:58,212 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:58,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:44:58,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:58,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:44:58,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2006, Unknown=4, NotChecked=0, Total=2256 [2022-11-03 01:44:58,214 INFO L87 Difference]: Start difference. First operand 2705 states and 3815 transitions. Second operand has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:01,535 INFO L93 Difference]: Finished difference Result 4708 states and 6555 transitions. [2022-11-03 01:45:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:45:01,536 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:45:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:01,545 INFO L225 Difference]: With dead ends: 4708 [2022-11-03 01:45:01,546 INFO L226 Difference]: Without dead ends: 4706 [2022-11-03 01:45:01,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=573, Invalid=3979, Unknown=4, NotChecked=0, Total=4556 [2022-11-03 01:45:01,548 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 636 mSDsluCounter, 2515 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 2625 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:01,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 2625 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 79 Unchecked, 0.0s Time] [2022-11-03 01:45:01,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4706 states. [2022-11-03 01:45:01,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4706 to 4561. [2022-11-03 01:45:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 1.3980263157894737) internal successors, (6375), 4560 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 6375 transitions. [2022-11-03 01:45:01,953 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 6375 transitions. Word has length 98 [2022-11-03 01:45:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:01,954 INFO L495 AbstractCegarLoop]: Abstraction has 4561 states and 6375 transitions. [2022-11-03 01:45:01,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 6375 transitions. [2022-11-03 01:45:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:45:01,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:01,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:02,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:02,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:02,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 01:45:02,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:45:02,589 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:02,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1824839633, now seen corresponding path program 1 times [2022-11-03 01:45:02,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:02,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139216428] [2022-11-03 01:45:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:02,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:02,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:02,592 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:02,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 01:45:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:03,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:45:03,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:45:05,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:45:08,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:08,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139216428] [2022-11-03 01:45:08,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139216428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:08,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [313830804] [2022-11-03 01:45:08,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:08,508 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:45:08,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:45:08,509 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:45:08,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 01:45:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:10,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 01:45:10,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:13,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:33,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [313830804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:33,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600641658] [2022-11-03 01:45:33,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:33,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:33,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:33,137 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:33,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 01:45:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:33,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:45:33,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:45:37,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:45:46,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600641658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:46,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:45:46,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 01:45:46,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291963562] [2022-11-03 01:45:46,061 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:46,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:45:46,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:46,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:45:46,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2006, Unknown=4, NotChecked=0, Total=2256 [2022-11-03 01:45:46,064 INFO L87 Difference]: Start difference. First operand 4561 states and 6375 transitions. Second operand has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:52,695 INFO L93 Difference]: Finished difference Result 9062 states and 12598 transitions. [2022-11-03 01:45:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:45:52,699 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:45:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:52,726 INFO L225 Difference]: With dead ends: 9062 [2022-11-03 01:45:52,726 INFO L226 Difference]: Without dead ends: 9060 [2022-11-03 01:45:52,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=573, Invalid=3979, Unknown=4, NotChecked=0, Total=4556 [2022-11-03 01:45:52,730 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 431 mSDsluCounter, 2832 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:52,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 2942 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-11-03 01:45:52,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9060 states. [2022-11-03 01:45:53,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9060 to 8795. [2022-11-03 01:45:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8795 states, 8794 states have (on average 1.3957243575164886) internal successors, (12274), 8794 states have internal predecessors, (12274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8795 states to 8795 states and 12274 transitions. [2022-11-03 01:45:53,407 INFO L78 Accepts]: Start accepts. Automaton has 8795 states and 12274 transitions. Word has length 98 [2022-11-03 01:45:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:53,408 INFO L495 AbstractCegarLoop]: Abstraction has 8795 states and 12274 transitions. [2022-11-03 01:45:53,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 8795 states and 12274 transitions. [2022-11-03 01:45:53,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:45:53,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:53,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:53,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:53,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 01:45:53,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:54,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:54,037 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:54,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:54,038 INFO L85 PathProgramCache]: Analyzing trace with hash 415652941, now seen corresponding path program 1 times [2022-11-03 01:45:54,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:54,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189294943] [2022-11-03 01:45:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:54,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:54,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:54,042 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:54,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 01:45:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:54,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:45:54,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:55,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:55,695 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:55,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189294943] [2022-11-03 01:45:55,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189294943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:55,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:55,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:45:55,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246996253] [2022-11-03 01:45:55,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:55,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:45:55,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:55,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:45:55,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:45:55,697 INFO L87 Difference]: Start difference. First operand 8795 states and 12274 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:57,056 INFO L93 Difference]: Finished difference Result 14293 states and 19527 transitions. [2022-11-03 01:45:57,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:45:57,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:45:57,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:57,083 INFO L225 Difference]: With dead ends: 14293 [2022-11-03 01:45:57,084 INFO L226 Difference]: Without dead ends: 13816 [2022-11-03 01:45:57,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:45:57,087 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 145 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:57,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 994 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 35 Unchecked, 0.4s Time] [2022-11-03 01:45:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13816 states. [2022-11-03 01:45:57,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13816 to 8795. [2022-11-03 01:45:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8795 states, 8794 states have (on average 1.3939049351830795) internal successors, (12258), 8794 states have internal predecessors, (12258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8795 states to 8795 states and 12258 transitions. [2022-11-03 01:45:57,703 INFO L78 Accepts]: Start accepts. Automaton has 8795 states and 12258 transitions. Word has length 98 [2022-11-03 01:45:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:57,704 INFO L495 AbstractCegarLoop]: Abstraction has 8795 states and 12258 transitions. [2022-11-03 01:45:57,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 8795 states and 12258 transitions. [2022-11-03 01:45:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:45:57,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:57,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:57,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 01:45:57,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:45:57,942 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:57,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:57,942 INFO L85 PathProgramCache]: Analyzing trace with hash 556201551, now seen corresponding path program 1 times [2022-11-03 01:45:57,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:57,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067549342] [2022-11-03 01:45:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:57,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:57,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:57,945 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:57,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 01:45:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:58,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:45:58,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:46:02,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:46:07,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:46:07,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067549342] [2022-11-03 01:46:07,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067549342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:07,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2052882613] [2022-11-03 01:46:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:07,736 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:46:07,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:46:07,737 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:46:07,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 01:46:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:09,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 01:46:09,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:14,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:46:34,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2052882613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:34,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921993281] [2022-11-03 01:46:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:34,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:34,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:46:34,411 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:46:34,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 01:46:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:46:35,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:46:35,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:46:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:46:40,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:46:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:46:49,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921993281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:46:49,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:46:49,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 01:46:49,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613149424] [2022-11-03 01:46:49,710 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:46:49,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:46:49,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:46:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:46:49,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2007, Unknown=3, NotChecked=0, Total=2256 [2022-11-03 01:46:49,713 INFO L87 Difference]: Start difference. First operand 8795 states and 12258 transitions. Second operand has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:46:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:46:57,578 INFO L93 Difference]: Finished difference Result 10493 states and 14669 transitions. [2022-11-03 01:46:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 01:46:57,579 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:46:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:46:57,595 INFO L225 Difference]: With dead ends: 10493 [2022-11-03 01:46:57,595 INFO L226 Difference]: Without dead ends: 10491 [2022-11-03 01:46:57,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=596, Invalid=4231, Unknown=3, NotChecked=0, Total=4830 [2022-11-03 01:46:57,599 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 504 mSDsluCounter, 3834 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 3944 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:46:57,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 3944 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-11-03 01:46:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2022-11-03 01:46:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 9455. [2022-11-03 01:46:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9455 states, 9454 states have (on average 1.393695790141739) internal successors, (13176), 9454 states have internal predecessors, (13176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:46:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9455 states to 9455 states and 13176 transitions. [2022-11-03 01:46:58,444 INFO L78 Accepts]: Start accepts. Automaton has 9455 states and 13176 transitions. Word has length 98 [2022-11-03 01:46:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:46:58,445 INFO L495 AbstractCegarLoop]: Abstraction has 9455 states and 13176 transitions. [2022-11-03 01:46:58,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:46:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 9455 states and 13176 transitions. [2022-11-03 01:46:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:46:58,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:46:58,458 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:46:58,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:58,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-03 01:46:58,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-03 01:46:59,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:46:59,081 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:46:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:46:59,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1215733073, now seen corresponding path program 1 times [2022-11-03 01:46:59,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:46:59,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618958895] [2022-11-03 01:46:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:46:59,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:46:59,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:46:59,085 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:46:59,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 01:47:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:47:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:47:03,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:47:10,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:10,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618958895] [2022-11-03 01:47:10,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618958895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:10,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [869597048] [2022-11-03 01:47:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:10,011 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:10,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:47:10,013 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:47:10,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 01:47:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:12,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 01:47:12,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:16,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:39,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [869597048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:39,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531262259] [2022-11-03 01:47:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:39,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:47:39,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:39,515 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:47:39,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-03 01:47:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:40,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:47:40,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:47:45,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:47:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:47:53,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531262259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:47:53,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:47:53,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 01:47:53,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448455223] [2022-11-03 01:47:53,833 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:47:53,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:47:53,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:53,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:47:53,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2003, Unknown=7, NotChecked=0, Total=2256 [2022-11-03 01:47:53,835 INFO L87 Difference]: Start difference. First operand 9455 states and 13176 transitions. Second operand has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:03,072 INFO L93 Difference]: Finished difference Result 11737 states and 16389 transitions. [2022-11-03 01:48:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 01:48:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:48:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:03,093 INFO L225 Difference]: With dead ends: 11737 [2022-11-03 01:48:03,093 INFO L226 Difference]: Without dead ends: 11735 [2022-11-03 01:48:03,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=608, Invalid=4355, Unknown=7, NotChecked=0, Total=4970 [2022-11-03 01:48:03,098 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 935 mSDsluCounter, 2849 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:03,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 2959 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-11-03 01:48:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11735 states. [2022-11-03 01:48:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11735 to 10487. [2022-11-03 01:48:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10487 states, 10486 states have (on average 1.3919511729925615) internal successors, (14596), 10486 states have internal predecessors, (14596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10487 states to 10487 states and 14596 transitions. [2022-11-03 01:48:04,207 INFO L78 Accepts]: Start accepts. Automaton has 10487 states and 14596 transitions. Word has length 98 [2022-11-03 01:48:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:04,208 INFO L495 AbstractCegarLoop]: Abstraction has 10487 states and 14596 transitions. [2022-11-03 01:48:04,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10487 states and 14596 transitions. [2022-11-03 01:48:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:48:04,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:04,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:04,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:04,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:04,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:04,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:04,845 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:04,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:04,846 INFO L85 PathProgramCache]: Analyzing trace with hash -589705261, now seen corresponding path program 1 times [2022-11-03 01:48:04,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:04,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647126647] [2022-11-03 01:48:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:04,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:04,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:04,849 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:04,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 01:48:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:05,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:48:05,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:48:09,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:48:15,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:15,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647126647] [2022-11-03 01:48:15,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647126647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:15,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854120398] [2022-11-03 01:48:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:15,955 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:15,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:15,956 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:15,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 01:48:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:18,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 01:48:18,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:23,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:41,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854120398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:41,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158080663] [2022-11-03 01:48:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:41,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:41,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:41,692 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:41,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-03 01:48:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:42,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:48:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:48:47,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:48:56,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158080663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:56,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:48:56,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 01:48:56,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166248568] [2022-11-03 01:48:56,801 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:56,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:48:56,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:56,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:48:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2006, Unknown=4, NotChecked=0, Total=2256 [2022-11-03 01:48:56,805 INFO L87 Difference]: Start difference. First operand 10487 states and 14596 transitions. Second operand has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:04,963 INFO L93 Difference]: Finished difference Result 12872 states and 17841 transitions. [2022-11-03 01:49:04,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:49:04,963 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:49:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:04,978 INFO L225 Difference]: With dead ends: 12872 [2022-11-03 01:49:04,979 INFO L226 Difference]: Without dead ends: 12870 [2022-11-03 01:49:04,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=573, Invalid=3979, Unknown=4, NotChecked=0, Total=4556 [2022-11-03 01:49:04,984 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 382 mSDsluCounter, 3098 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 3208 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:04,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 3208 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-11-03 01:49:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12870 states. [2022-11-03 01:49:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12870 to 12605. [2022-11-03 01:49:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12605 states, 12604 states have (on average 1.3897968898762298) internal successors, (17517), 12604 states have internal predecessors, (17517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12605 states to 12605 states and 17517 transitions. [2022-11-03 01:49:06,177 INFO L78 Accepts]: Start accepts. Automaton has 12605 states and 17517 transitions. Word has length 98 [2022-11-03 01:49:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:06,178 INFO L495 AbstractCegarLoop]: Abstraction has 12605 states and 17517 transitions. [2022-11-03 01:49:06,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:49:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 12605 states and 17517 transitions. [2022-11-03 01:49:06,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:49:06,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:06,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:06,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:06,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:06,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2022-11-03 01:49:06,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:49:06,809 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:06,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:06,810 INFO L85 PathProgramCache]: Analyzing trace with hash 203113169, now seen corresponding path program 1 times [2022-11-03 01:49:06,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:06,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985418211] [2022-11-03 01:49:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:06,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:06,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:06,812 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:06,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 01:49:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:07,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:49:07,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:49:11,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:49:18,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:18,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985418211] [2022-11-03 01:49:18,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985418211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:18,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [549743546] [2022-11-03 01:49:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:18,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:49:18,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:49:18,121 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:49:18,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 01:49:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:20,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 01:49:20,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:25,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:42,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [549743546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:42,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131096844] [2022-11-03 01:49:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:42,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:42,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:42,026 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:42,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-03 01:49:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:42,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:49:42,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:49:47,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:49:57,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131096844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:57,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:49:57,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 01:49:57,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444321707] [2022-11-03 01:49:57,691 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:49:57,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:49:57,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:57,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:49:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2009, Unknown=1, NotChecked=0, Total=2256 [2022-11-03 01:49:57,695 INFO L87 Difference]: Start difference. First operand 12605 states and 17517 transitions. Second operand has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:06,139 INFO L93 Difference]: Finished difference Result 13502 states and 18723 transitions. [2022-11-03 01:50:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:50:06,139 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:50:06,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:06,152 INFO L225 Difference]: With dead ends: 13502 [2022-11-03 01:50:06,152 INFO L226 Difference]: Without dead ends: 13500 [2022-11-03 01:50:06,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=573, Invalid=3982, Unknown=1, NotChecked=0, Total=4556 [2022-11-03 01:50:06,157 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 390 mSDsluCounter, 3010 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 3120 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:06,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 3120 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-11-03 01:50:06,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13500 states. [2022-11-03 01:50:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13500 to 13265. [2022-11-03 01:50:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13265 states, 13264 states have (on average 1.3898522316043427) internal successors, (18435), 13264 states have internal predecessors, (18435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13265 states to 13265 states and 18435 transitions. [2022-11-03 01:50:07,436 INFO L78 Accepts]: Start accepts. Automaton has 13265 states and 18435 transitions. Word has length 98 [2022-11-03 01:50:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:07,437 INFO L495 AbstractCegarLoop]: Abstraction has 13265 states and 18435 transitions. [2022-11-03 01:50:07,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 13265 states and 18435 transitions. [2022-11-03 01:50:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:50:07,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:07,450 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:07,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:07,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:07,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:08,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:50:08,065 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash 862644691, now seen corresponding path program 1 times [2022-11-03 01:50:08,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:50:08,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079424304] [2022-11-03 01:50:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:08,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:50:08,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:50:08,069 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:50:08,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 01:50:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:09,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:50:09,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:50:12,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:50:19,637 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:50:19,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079424304] [2022-11-03 01:50:19,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079424304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:19,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [781437003] [2022-11-03 01:50:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:19,638 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:50:19,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:50:19,639 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:50:19,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-03 01:50:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:21,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 01:50:21,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:27,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:43,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [781437003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:43,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156574136] [2022-11-03 01:50:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:43,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:43,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:43,188 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:43,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-03 01:50:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:44,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:50:44,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:50:49,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:50:59,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156574136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:59,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:50:59,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 01:50:59,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461331712] [2022-11-03 01:50:59,223 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:59,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:50:59,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:59,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:50:59,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2007, Unknown=3, NotChecked=0, Total=2256 [2022-11-03 01:50:59,225 INFO L87 Difference]: Start difference. First operand 13265 states and 18435 transitions. Second operand has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:07,948 INFO L93 Difference]: Finished difference Result 14564 states and 20179 transitions. [2022-11-03 01:51:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:51:07,949 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:51:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:07,959 INFO L225 Difference]: With dead ends: 14564 [2022-11-03 01:51:07,959 INFO L226 Difference]: Without dead ends: 14562 [2022-11-03 01:51:07,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=573, Invalid=3980, Unknown=3, NotChecked=0, Total=4556 [2022-11-03 01:51:07,962 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 340 mSDsluCounter, 2811 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 2921 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:07,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 2921 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-03 01:51:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14562 states. [2022-11-03 01:51:09,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14562 to 14297. [2022-11-03 01:51:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14297 states, 14296 states have (on average 1.3888500279798546) internal successors, (19855), 14296 states have internal predecessors, (19855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14297 states to 14297 states and 19855 transitions. [2022-11-03 01:51:09,127 INFO L78 Accepts]: Start accepts. Automaton has 14297 states and 19855 transitions. Word has length 98 [2022-11-03 01:51:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:09,127 INFO L495 AbstractCegarLoop]: Abstraction has 14297 states and 19855 transitions. [2022-11-03 01:51:09,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 14297 states and 19855 transitions. [2022-11-03 01:51:09,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:51:09,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:09,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:09,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:09,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-03 01:51:09,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-03 01:51:09,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:51:09,795 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:09,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:09,795 INFO L85 PathProgramCache]: Analyzing trace with hash -942793643, now seen corresponding path program 1 times [2022-11-03 01:51:09,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:51:09,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474022544] [2022-11-03 01:51:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:09,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:51:09,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:51:09,798 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:51:09,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 01:51:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:10,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:51:10,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:51:14,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:51:20,922 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:51:20,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474022544] [2022-11-03 01:51:20,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474022544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:20,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2090027140] [2022-11-03 01:51:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:20,923 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:51:20,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:51:20,924 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:51:20,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-03 01:51:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:22,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 01:51:22,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:28,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:47,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2090027140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:47,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045212349] [2022-11-03 01:51:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:47,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:47,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:47,552 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:47,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-03 01:51:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:48,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:51:48,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:51:53,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:52:04,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045212349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:04,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:52:04,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 01:52:04,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643727924] [2022-11-03 01:52:04,353 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:04,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:52:04,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:04,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:52:04,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2008, Unknown=2, NotChecked=0, Total=2256 [2022-11-03 01:52:04,355 INFO L87 Difference]: Start difference. First operand 14297 states and 19855 transitions. Second operand has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:15,568 INFO L93 Difference]: Finished difference Result 29338 states and 40602 transitions. [2022-11-03 01:52:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 01:52:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-03 01:52:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:15,586 INFO L225 Difference]: With dead ends: 29338 [2022-11-03 01:52:15,586 INFO L226 Difference]: Without dead ends: 29336 [2022-11-03 01:52:15,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=573, Invalid=3981, Unknown=2, NotChecked=0, Total=4556 [2022-11-03 01:52:15,591 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 493 mSDsluCounter, 3052 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 3162 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:15,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 3162 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-11-03 01:52:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29336 states. [2022-11-03 01:52:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29336 to 28531. [2022-11-03 01:52:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28531 states, 28530 states have (on average 1.3890641430073607) internal successors, (39630), 28530 states have internal predecessors, (39630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28531 states to 28531 states and 39630 transitions. [2022-11-03 01:52:17,968 INFO L78 Accepts]: Start accepts. Automaton has 28531 states and 39630 transitions. Word has length 98 [2022-11-03 01:52:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:17,969 INFO L495 AbstractCegarLoop]: Abstraction has 28531 states and 39630 transitions. [2022-11-03 01:52:17,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:17,969 INFO L276 IsEmpty]: Start isEmpty. Operand 28531 states and 39630 transitions. [2022-11-03 01:52:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 01:52:17,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:17,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:18,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-11-03 01:52:18,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:18,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2022-11-03 01:52:18,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:18,589 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash -519146921, now seen corresponding path program 1 times [2022-11-03 01:52:18,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:18,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594537142] [2022-11-03 01:52:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:18,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:18,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:18,592 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:18,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 01:52:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:19,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:52:19,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:52:23,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:52:30,134 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594537142] [2022-11-03 01:52:30,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594537142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [928932518] [2022-11-03 01:52:30,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:30,136 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:30,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:30,137 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:30,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 01:52:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:32,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 01:52:32,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:38,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:06,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [928932518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:06,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947020693] [2022-11-03 01:53:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:06,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:06,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:06,555 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:06,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c6cf6dd-e141-4236-86f3-2b4a7d6add2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-03 01:53:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:07,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:53:07,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:53:12,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:53:23,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947020693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:23,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:53:23,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 01:53:23,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234925028] [2022-11-03 01:53:23,038 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:23,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:53:23,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:23,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:53:23,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2005, Unknown=5, NotChecked=0, Total=2256 [2022-11-03 01:53:23,039 INFO L87 Difference]: Start difference. First operand 28531 states and 39630 transitions. Second operand has 48 states, 48 states have (on average 11.958333333333334) internal successors, (574), 48 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)