./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 88d274727136b53784890e6d1e1bf78dc0f4647c470f9c2edec85a87ad689472 --- 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-2329fc7 [2022-12-14 06:51:05,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:51:05,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:51:05,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:51:05,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:51:05,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:51:05,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:51:05,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:51:05,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:51:05,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:51:05,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:51:05,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:51:05,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:51:05,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:51:05,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:51:05,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:51:05,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:51:05,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:51:05,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:51:05,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:51:05,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:51:05,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:51:05,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:51:05,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:51:05,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:51:05,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:51:05,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:51:05,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:51:05,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:51:05,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:51:05,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:51:05,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:51:05,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:51:05,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:51:05,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:51:05,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:51:05,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:51:05,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:51:05,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:51:05,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:51:05,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:51:05,074 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:51:05,094 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:51:05,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:51:05,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:51:05,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:51:05,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:51:05,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:51:05,096 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:51:05,096 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:51:05,096 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:51:05,096 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:51:05,096 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:51:05,096 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:51:05,097 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:51:05,097 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:51:05,097 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:51:05,097 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:51:05,097 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:51:05,097 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:51:05,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:51:05,098 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:51:05,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:51:05,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:51:05,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:51:05,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:51:05,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:51:05,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:51:05,099 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:51:05,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:51:05,099 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:51:05,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:51:05,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:51:05,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:51:05,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:51:05,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:51:05,100 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:51:05,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:51:05,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:51:05,100 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:51:05,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:51:05,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:51:05,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:51:05,101 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_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 88d274727136b53784890e6d1e1bf78dc0f4647c470f9c2edec85a87ad689472 [2022-12-14 06:51:05,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:51:05,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:51:05,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:51:05,289 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:51:05,290 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:51:05,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-1.c [2022-12-14 06:51:07,886 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:51:08,324 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:51:08,325 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-1.c [2022-12-14 06:51:08,361 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/data/d3096fd36/0015f7b4e6734c1db3440a6bf4641413/FLAG5ff3518bf [2022-12-14 06:51:08,374 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/data/d3096fd36/0015f7b4e6734c1db3440a6bf4641413 [2022-12-14 06:51:08,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:51:08,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:51:08,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:51:08,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:51:08,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:51:08,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:51:08" (1/1) ... [2022-12-14 06:51:08,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db0358c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:08, skipping insertion in model container [2022-12-14 06:51:08,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:51:08" (1/1) ... [2022-12-14 06:51:08,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:51:08,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:51:09,877 WARN L237 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_78cecb81-4088-41dc-84f6-303c36270614/sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-1.c[380323,380336] [2022-12-14 06:51:09,897 WARN L237 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_78cecb81-4088-41dc-84f6-303c36270614/sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-1.c[383339,383352] [2022-12-14 06:51:10,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:51:10,135 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:51:10,922 WARN L237 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_78cecb81-4088-41dc-84f6-303c36270614/sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-1.c[380323,380336] [2022-12-14 06:51:10,926 WARN L237 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_78cecb81-4088-41dc-84f6-303c36270614/sv-benchmarks/c/combinations/Problem05_label45+token_ring.11.cil-1.c[383339,383352] [2022-12-14 06:51:10,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:51:10,981 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:51:10,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10 WrapperNode [2022-12-14 06:51:10,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:51:10,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:51:10,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:51:10,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:51:10,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10" (1/1) ... [2022-12-14 06:51:11,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10" (1/1) ... [2022-12-14 06:51:11,252 INFO L138 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 13146 [2022-12-14 06:51:11,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:51:11,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:51:11,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:51:11,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:51:11,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10" (1/1) ... [2022-12-14 06:51:11,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10" (1/1) ... [2022-12-14 06:51:11,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10" (1/1) ... [2022-12-14 06:51:11,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10" (1/1) ... [2022-12-14 06:51:11,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10" (1/1) ... [2022-12-14 06:51:11,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10" (1/1) ... [2022-12-14 06:51:11,509 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10" (1/1) ... [2022-12-14 06:51:11,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10" (1/1) ... [2022-12-14 06:51:11,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:51:11,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:51:11,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:51:11,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:51:11,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10" (1/1) ... [2022-12-14 06:51:11,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:51:11,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:11,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:51:11,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:51:11,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:51:11,651 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 06:51:11,651 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 06:51:11,651 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 06:51:11,651 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 06:51:11,651 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 06:51:11,651 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 06:51:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 06:51:11,652 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 06:51:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 06:51:11,652 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 06:51:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 06:51:11,652 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 06:51:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 06:51:11,652 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 06:51:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:51:11,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:51:11,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:51:11,773 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:51:11,775 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:51:17,532 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:51:18,979 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:51:18,979 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-12-14 06:51:18,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:51:18 BoogieIcfgContainer [2022-12-14 06:51:18,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:51:18,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:51:18,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:51:18,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:51:18,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:51:08" (1/3) ... [2022-12-14 06:51:18,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a751038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:51:18, skipping insertion in model container [2022-12-14 06:51:18,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:51:10" (2/3) ... [2022-12-14 06:51:18,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a751038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:51:18, skipping insertion in model container [2022-12-14 06:51:18,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:51:18" (3/3) ... [2022-12-14 06:51:18,991 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.11.cil-1.c [2022-12-14 06:51:19,011 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:51:19,011 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 06:51:19,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:51:19,099 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;@30e697dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:51:19,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 06:51:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-12-14 06:51:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 06:51:19,120 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:19,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:19,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:19,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:19,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1105018807, now seen corresponding path program 1 times [2022-12-14 06:51:19,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:19,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528567128] [2022-12-14 06:51:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:19,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:51:19,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:19,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528567128] [2022-12-14 06:51:19,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528567128] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:19,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:51:19,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:51:19,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260056305] [2022-12-14 06:51:19,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:19,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:51:19,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:19,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:51:19,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:51:19,574 INFO L87 Difference]: Start difference. First operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:51:20,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:20,357 INFO L93 Difference]: Finished difference Result 3811 states and 7391 transitions. [2022-12-14 06:51:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:51:20,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2022-12-14 06:51:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:20,373 INFO L225 Difference]: With dead ends: 3811 [2022-12-14 06:51:20,373 INFO L226 Difference]: Without dead ends: 1984 [2022-12-14 06:51:20,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:51:20,381 INFO L413 NwaCegarLoop]: 3488 mSDtfsCounter, 3754 mSDsluCounter, 3392 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3754 SdHoareTripleChecker+Valid, 6880 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:20,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3754 Valid, 6880 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:51:20,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-12-14 06:51:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1983. [2022-12-14 06:51:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1921 states have (on average 1.9229567933368037) internal successors, (3694), 1925 states have internal predecessors, (3694), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2022-12-14 06:51:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3788 transitions. [2022-12-14 06:51:20,469 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3788 transitions. Word has length 65 [2022-12-14 06:51:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:20,469 INFO L495 AbstractCegarLoop]: Abstraction has 1983 states and 3788 transitions. [2022-12-14 06:51:20,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:51:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3788 transitions. [2022-12-14 06:51:20,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 06:51:20,474 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:20,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:20,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:51:20,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:20,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:20,475 INFO L85 PathProgramCache]: Analyzing trace with hash 99893520, now seen corresponding path program 1 times [2022-12-14 06:51:20,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:20,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525727092] [2022-12-14 06:51:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:20,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:51:20,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:20,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525727092] [2022-12-14 06:51:20,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525727092] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:51:20,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279849747] [2022-12-14 06:51:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:20,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:20,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:20,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:20,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:51:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:20,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:51:20,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:51:20,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:51:20,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279849747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:20,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:51:20,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:51:20,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498801961] [2022-12-14 06:51:20,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:20,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:51:20,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:20,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:51:20,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:20,921 INFO L87 Difference]: Start difference. First operand 1983 states and 3788 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:51:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:21,326 INFO L93 Difference]: Finished difference Result 2650 states and 4829 transitions. [2022-12-14 06:51:21,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:51:21,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 06:51:21,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:21,337 INFO L225 Difference]: With dead ends: 2650 [2022-12-14 06:51:21,337 INFO L226 Difference]: Without dead ends: 2313 [2022-12-14 06:51:21,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:21,340 INFO L413 NwaCegarLoop]: 3340 mSDtfsCounter, 3497 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:21,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3497 Valid, 3557 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:51:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-12-14 06:51:21,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2307. [2022-12-14 06:51:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2193 states have (on average 1.8718650250797995) internal successors, (4105), 2198 states have internal predecessors, (4105), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-12-14 06:51:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 4279 transitions. [2022-12-14 06:51:21,398 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 4279 transitions. Word has length 130 [2022-12-14 06:51:21,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:21,399 INFO L495 AbstractCegarLoop]: Abstraction has 2307 states and 4279 transitions. [2022-12-14 06:51:21,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:51:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 4279 transitions. [2022-12-14 06:51:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 06:51:21,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:21,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:21,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:51:21,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:21,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:21,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1003315570, now seen corresponding path program 1 times [2022-12-14 06:51:21,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:21,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372699109] [2022-12-14 06:51:21,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:21,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:51:21,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:21,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372699109] [2022-12-14 06:51:21,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372699109] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:51:21,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622509303] [2022-12-14 06:51:21,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:21,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:21,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:21,761 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:21,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:51:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:21,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:51:21,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:51:22,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:51:22,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622509303] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:22,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:51:22,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:51:22,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222756301] [2022-12-14 06:51:22,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:22,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:51:22,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:22,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:51:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:22,003 INFO L87 Difference]: Start difference. First operand 2307 states and 4279 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:51:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:22,446 INFO L93 Difference]: Finished difference Result 3616 states and 6318 transitions. [2022-12-14 06:51:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:51:22,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 06:51:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:22,461 INFO L225 Difference]: With dead ends: 3616 [2022-12-14 06:51:22,461 INFO L226 Difference]: Without dead ends: 2955 [2022-12-14 06:51:22,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:22,467 INFO L413 NwaCegarLoop]: 3339 mSDtfsCounter, 3509 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:22,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:51:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2022-12-14 06:51:22,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2947. [2022-12-14 06:51:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2731 states have (on average 1.7997070670084219) internal successors, (4915), 2738 states have internal predecessors, (4915), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2022-12-14 06:51:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 5245 transitions. [2022-12-14 06:51:22,607 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 5245 transitions. Word has length 130 [2022-12-14 06:51:22,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:22,607 INFO L495 AbstractCegarLoop]: Abstraction has 2947 states and 5245 transitions. [2022-12-14 06:51:22,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:51:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 5245 transitions. [2022-12-14 06:51:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 06:51:22,613 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:22,613 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:22,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:51:22,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:22,814 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash 323661580, now seen corresponding path program 1 times [2022-12-14 06:51:22,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:22,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115004108] [2022-12-14 06:51:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:22,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:51:23,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:23,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115004108] [2022-12-14 06:51:23,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115004108] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:51:23,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515177061] [2022-12-14 06:51:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:23,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:23,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:23,015 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:23,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:51:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:23,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:51:23,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 06:51:23,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:51:23,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515177061] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:23,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:51:23,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:51:23,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711440915] [2022-12-14 06:51:23,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:23,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:51:23,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:23,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:51:23,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:23,234 INFO L87 Difference]: Start difference. First operand 2947 states and 5245 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:51:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:23,691 INFO L93 Difference]: Finished difference Result 5524 states and 9246 transitions. [2022-12-14 06:51:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:51:23,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 06:51:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:23,705 INFO L225 Difference]: With dead ends: 5524 [2022-12-14 06:51:23,706 INFO L226 Difference]: Without dead ends: 4223 [2022-12-14 06:51:23,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:23,712 INFO L413 NwaCegarLoop]: 3338 mSDtfsCounter, 3515 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3555 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:23,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 3555 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:51:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2022-12-14 06:51:23,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4211. [2022-12-14 06:51:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 3795 states have (on average 1.7156785243741766) internal successors, (6511), 3806 states have internal predecessors, (6511), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2022-12-14 06:51:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 7145 transitions. [2022-12-14 06:51:23,833 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 7145 transitions. Word has length 130 [2022-12-14 06:51:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:23,833 INFO L495 AbstractCegarLoop]: Abstraction has 4211 states and 7145 transitions. [2022-12-14 06:51:23,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:51:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 7145 transitions. [2022-12-14 06:51:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 06:51:23,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:23,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:23,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:51:24,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:24,039 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:24,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:24,039 INFO L85 PathProgramCache]: Analyzing trace with hash 493349130, now seen corresponding path program 1 times [2022-12-14 06:51:24,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:24,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431568544] [2022-12-14 06:51:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:24,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:51:24,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:24,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431568544] [2022-12-14 06:51:24,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431568544] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:51:24,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234434636] [2022-12-14 06:51:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:24,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:24,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:24,154 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:24,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:51:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:24,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:51:24,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:51:24,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:51:24,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234434636] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:24,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:51:24,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:51:24,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217267159] [2022-12-14 06:51:24,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:24,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:51:24,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:51:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:24,341 INFO L87 Difference]: Start difference. First operand 4211 states and 7145 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:51:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:24,759 INFO L93 Difference]: Finished difference Result 9292 states and 15002 transitions. [2022-12-14 06:51:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:51:24,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 06:51:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:24,782 INFO L225 Difference]: With dead ends: 9292 [2022-12-14 06:51:24,782 INFO L226 Difference]: Without dead ends: 6727 [2022-12-14 06:51:24,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:24,790 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3503 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:24,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3503 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:51:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2022-12-14 06:51:25,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6707. [2022-12-14 06:51:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6707 states, 5899 states have (on average 1.6367180878114935) internal successors, (9655), 5918 states have internal predecessors, (9655), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2022-12-14 06:51:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 10881 transitions. [2022-12-14 06:51:25,067 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 10881 transitions. Word has length 130 [2022-12-14 06:51:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:25,067 INFO L495 AbstractCegarLoop]: Abstraction has 6707 states and 10881 transitions. [2022-12-14 06:51:25,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:51:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 10881 transitions. [2022-12-14 06:51:25,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 06:51:25,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:25,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:25,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 06:51:25,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:25,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:25,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:25,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1644015624, now seen corresponding path program 1 times [2022-12-14 06:51:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:25,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830220631] [2022-12-14 06:51:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:25,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:51:25,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:25,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830220631] [2022-12-14 06:51:25,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830220631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:51:25,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17780010] [2022-12-14 06:51:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:25,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:25,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:25,465 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:25,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:51:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:25,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:51:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 06:51:25,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:51:25,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17780010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:25,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:51:25,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:51:25,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617037405] [2022-12-14 06:51:25,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:25,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:51:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:25,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:51:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:25,653 INFO L87 Difference]: Start difference. First operand 6707 states and 10881 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:51:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:26,271 INFO L93 Difference]: Finished difference Result 16732 states and 26314 transitions. [2022-12-14 06:51:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:51:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 06:51:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:26,317 INFO L225 Difference]: With dead ends: 16732 [2022-12-14 06:51:26,317 INFO L226 Difference]: Without dead ends: 11671 [2022-12-14 06:51:26,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:26,331 INFO L413 NwaCegarLoop]: 3336 mSDtfsCounter, 3518 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:26,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3518 Valid, 3553 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:51:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11671 states. [2022-12-14 06:51:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11671 to 11635. [2022-12-14 06:51:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 10059 states have (on average 1.575405109851874) internal successors, (15847), 10094 states have internal predecessors, (15847), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2022-12-14 06:51:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 18225 transitions. [2022-12-14 06:51:26,594 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 18225 transitions. Word has length 130 [2022-12-14 06:51:26,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:26,594 INFO L495 AbstractCegarLoop]: Abstraction has 11635 states and 18225 transitions. [2022-12-14 06:51:26,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:51:26,595 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 18225 transitions. [2022-12-14 06:51:26,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 06:51:26,609 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:26,609 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:26,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:51:26,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 06:51:26,810 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1629310282, now seen corresponding path program 1 times [2022-12-14 06:51:26,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:26,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836114384] [2022-12-14 06:51:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:26,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:51:26,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:26,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836114384] [2022-12-14 06:51:26,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836114384] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:51:26,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106051800] [2022-12-14 06:51:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:26,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:26,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:26,930 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:26,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:51:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:27,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:51:27,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:51:27,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:51:27,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106051800] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:27,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:51:27,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:51:27,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250338650] [2022-12-14 06:51:27,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:27,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:51:27,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:27,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:51:27,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:27,160 INFO L87 Difference]: Start difference. First operand 11635 states and 18225 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:51:27,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:27,982 INFO L93 Difference]: Finished difference Result 31420 states and 48538 transitions. [2022-12-14 06:51:27,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:51:27,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-12-14 06:51:27,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:28,038 INFO L225 Difference]: With dead ends: 31420 [2022-12-14 06:51:28,038 INFO L226 Difference]: Without dead ends: 21431 [2022-12-14 06:51:28,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:28,064 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3491 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:28,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3491 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:51:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21431 states. [2022-12-14 06:51:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21431 to 21363. [2022-12-14 06:51:28,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21363 states, 18283 states have (on average 1.53361045780233) internal successors, (28039), 18350 states have internal predecessors, (28039), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2022-12-14 06:51:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21363 states to 21363 states and 32657 transitions. [2022-12-14 06:51:28,647 INFO L78 Accepts]: Start accepts. Automaton has 21363 states and 32657 transitions. Word has length 130 [2022-12-14 06:51:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:28,647 INFO L495 AbstractCegarLoop]: Abstraction has 21363 states and 32657 transitions. [2022-12-14 06:51:28,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:51:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 21363 states and 32657 transitions. [2022-12-14 06:51:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 06:51:28,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:28,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:28,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:51:28,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:28,868 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash -824762040, now seen corresponding path program 1 times [2022-12-14 06:51:28,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:28,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521513321] [2022-12-14 06:51:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:28,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:51:29,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:29,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521513321] [2022-12-14 06:51:29,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521513321] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:29,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:51:29,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:51:29,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108701778] [2022-12-14 06:51:29,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:29,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:51:29,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:29,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:51:29,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:29,213 INFO L87 Difference]: Start difference. First operand 21363 states and 32657 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:51:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:31,132 INFO L93 Difference]: Finished difference Result 55355 states and 83479 transitions. [2022-12-14 06:51:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:51:31,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-12-14 06:51:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:31,232 INFO L225 Difference]: With dead ends: 55355 [2022-12-14 06:51:31,232 INFO L226 Difference]: Without dead ends: 35639 [2022-12-14 06:51:31,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:51:31,263 INFO L413 NwaCegarLoop]: 3328 mSDtfsCounter, 4171 mSDsluCounter, 6622 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4177 SdHoareTripleChecker+Valid, 9950 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:31,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4177 Valid, 9950 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:51:31,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35639 states. [2022-12-14 06:51:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35639 to 30963. [2022-12-14 06:51:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30963 states, 26379 states have (on average 1.5154099852155123) internal successors, (39975), 26478 states have internal predecessors, (39975), 3430 states have call successors, (3430), 1153 states have call predecessors, (3430), 1152 states have return successors, (3428), 3332 states have call predecessors, (3428), 3428 states have call successors, (3428) [2022-12-14 06:51:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30963 states to 30963 states and 46833 transitions. [2022-12-14 06:51:32,261 INFO L78 Accepts]: Start accepts. Automaton has 30963 states and 46833 transitions. Word has length 130 [2022-12-14 06:51:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:32,262 INFO L495 AbstractCegarLoop]: Abstraction has 30963 states and 46833 transitions. [2022-12-14 06:51:32,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:51:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 30963 states and 46833 transitions. [2022-12-14 06:51:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 06:51:32,286 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:32,286 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:32,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:51:32,287 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:32,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1220914535, now seen corresponding path program 1 times [2022-12-14 06:51:32,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:32,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133822463] [2022-12-14 06:51:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:32,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:51:32,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:32,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133822463] [2022-12-14 06:51:32,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133822463] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:32,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:51:32,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:51:32,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559806301] [2022-12-14 06:51:32,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:32,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:51:32,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:32,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:51:32,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:32,612 INFO L87 Difference]: Start difference. First operand 30963 states and 46833 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:51:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:35,642 INFO L93 Difference]: Finished difference Result 99579 states and 149272 transitions. [2022-12-14 06:51:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:51:35,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2022-12-14 06:51:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:35,844 INFO L225 Difference]: With dead ends: 99579 [2022-12-14 06:51:35,844 INFO L226 Difference]: Without dead ends: 70263 [2022-12-14 06:51:35,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:51:35,904 INFO L413 NwaCegarLoop]: 3306 mSDtfsCounter, 4172 mSDsluCounter, 9721 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4192 SdHoareTripleChecker+Valid, 13027 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:35,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4192 Valid, 13027 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:51:35,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70263 states. [2022-12-14 06:51:38,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70263 to 59123. [2022-12-14 06:51:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59123 states, 50155 states have (on average 1.494387399062905) internal successors, (74951), 50350 states have internal predecessors, (74951), 6662 states have call successors, (6662), 2305 states have call predecessors, (6662), 2304 states have return successors, (6660), 6468 states have call predecessors, (6660), 6660 states have call successors, (6660) [2022-12-14 06:51:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59123 states to 59123 states and 88273 transitions. [2022-12-14 06:51:38,278 INFO L78 Accepts]: Start accepts. Automaton has 59123 states and 88273 transitions. Word has length 131 [2022-12-14 06:51:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:38,278 INFO L495 AbstractCegarLoop]: Abstraction has 59123 states and 88273 transitions. [2022-12-14 06:51:38,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:51:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 59123 states and 88273 transitions. [2022-12-14 06:51:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 06:51:38,339 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:38,339 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:38,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:51:38,340 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:38,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1115454184, now seen corresponding path program 1 times [2022-12-14 06:51:38,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:38,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514315537] [2022-12-14 06:51:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:38,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:51:38,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:38,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514315537] [2022-12-14 06:51:38,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514315537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:38,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:51:38,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:51:38,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692308125] [2022-12-14 06:51:38,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:38,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:51:38,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:51:38,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:51:38,715 INFO L87 Difference]: Start difference. First operand 59123 states and 88273 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:51:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:45,485 INFO L93 Difference]: Finished difference Result 202619 states and 300632 transitions. [2022-12-14 06:51:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:51:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 132 [2022-12-14 06:51:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:45,972 INFO L225 Difference]: With dead ends: 202619 [2022-12-14 06:51:45,972 INFO L226 Difference]: Without dead ends: 145143 [2022-12-14 06:51:46,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:51:46,059 INFO L413 NwaCegarLoop]: 3300 mSDtfsCounter, 4331 mSDsluCounter, 6545 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4351 SdHoareTripleChecker+Valid, 9845 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:46,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4351 Valid, 9845 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:51:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145143 states. [2022-12-14 06:51:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145143 to 114291. [2022-12-14 06:51:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114291 states, 96747 states have (on average 1.4798908493286613) internal successors, (143175), 97134 states have internal predecessors, (143175), 12934 states have call successors, (12934), 4609 states have call predecessors, (12934), 4608 states have return successors, (12932), 12548 states have call predecessors, (12932), 12932 states have call successors, (12932) [2022-12-14 06:51:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114291 states to 114291 states and 169041 transitions. [2022-12-14 06:51:51,640 INFO L78 Accepts]: Start accepts. Automaton has 114291 states and 169041 transitions. Word has length 132 [2022-12-14 06:51:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:51:51,640 INFO L495 AbstractCegarLoop]: Abstraction has 114291 states and 169041 transitions. [2022-12-14 06:51:51,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:51:51,640 INFO L276 IsEmpty]: Start isEmpty. Operand 114291 states and 169041 transitions. [2022-12-14 06:51:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 06:51:51,767 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:51:51,767 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:51:51,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:51:51,768 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:51:51,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:51:51,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1457979833, now seen corresponding path program 1 times [2022-12-14 06:51:51,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:51:51,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807432747] [2022-12-14 06:51:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:51,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:51:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:51:52,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:51:52,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807432747] [2022-12-14 06:51:52,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807432747] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:51:52,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905248011] [2022-12-14 06:51:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:51:52,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:51:52,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:51:52,016 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:51:52,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:51:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:51:52,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:51:52,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:51:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 06:51:52,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:51:52,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905248011] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:51:52,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:51:52,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 06:51:52,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699580137] [2022-12-14 06:51:52,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:51:52,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:51:52,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:51:52,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:51:52,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:51:52,209 INFO L87 Difference]: Start difference. First operand 114291 states and 169041 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:51:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:51:58,025 INFO L93 Difference]: Finished difference Result 201207 states and 301652 transitions. [2022-12-14 06:51:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:51:58,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 155 [2022-12-14 06:51:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:51:58,396 INFO L225 Difference]: With dead ends: 201207 [2022-12-14 06:51:58,396 INFO L226 Difference]: Without dead ends: 143347 [2022-12-14 06:51:58,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:51:58,497 INFO L413 NwaCegarLoop]: 3403 mSDtfsCounter, 114 mSDsluCounter, 3293 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6696 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:51:58,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6696 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:51:58,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143347 states. [2022-12-14 06:52:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143347 to 134963. [2022-12-14 06:52:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134963 states, 116651 states have (on average 1.5181610101927974) internal successors, (177095), 117038 states have internal predecessors, (177095), 13318 states have call successors, (13318), 4993 states have call predecessors, (13318), 4992 states have return successors, (13316), 12932 states have call predecessors, (13316), 13316 states have call successors, (13316) [2022-12-14 06:52:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134963 states to 134963 states and 203729 transitions. [2022-12-14 06:52:04,650 INFO L78 Accepts]: Start accepts. Automaton has 134963 states and 203729 transitions. Word has length 155 [2022-12-14 06:52:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:04,651 INFO L495 AbstractCegarLoop]: Abstraction has 134963 states and 203729 transitions. [2022-12-14 06:52:04,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:52:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand 134963 states and 203729 transitions. [2022-12-14 06:52:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-12-14 06:52:04,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:04,840 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:04,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:52:05,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:05,042 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:05,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:05,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1883496884, now seen corresponding path program 1 times [2022-12-14 06:52:05,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:05,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516492355] [2022-12-14 06:52:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:05,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 06:52:05,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:05,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516492355] [2022-12-14 06:52:05,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516492355] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:52:05,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607218227] [2022-12-14 06:52:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:05,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:05,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:05,278 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:52:05,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:52:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:05,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:52:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:52:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 06:52:05,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:52:05,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607218227] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:52:05,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:52:05,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 06:52:05,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704859381] [2022-12-14 06:52:05,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:52:05,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:52:05,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:05,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:52:05,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:52:05,558 INFO L87 Difference]: Start difference. First operand 134963 states and 203729 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 06:52:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:16,434 INFO L93 Difference]: Finished difference Result 399292 states and 608346 transitions. [2022-12-14 06:52:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:52:16,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 202 [2022-12-14 06:52:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:17,186 INFO L225 Difference]: With dead ends: 399292 [2022-12-14 06:52:17,186 INFO L226 Difference]: Without dead ends: 265975 [2022-12-14 06:52:17,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:52:17,419 INFO L413 NwaCegarLoop]: 3309 mSDtfsCounter, 3445 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:17,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3526 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:52:17,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265975 states. [2022-12-14 06:52:28,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265975 to 264819. [2022-12-14 06:52:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264819 states, 228971 states have (on average 1.5091125076974814) internal successors, (345543), 229742 states have internal predecessors, (345543), 25862 states have call successors, (25862), 9985 states have call predecessors, (25862), 9984 states have return successors, (25860), 25092 states have call predecessors, (25860), 25860 states have call successors, (25860) [2022-12-14 06:52:29,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264819 states to 264819 states and 397265 transitions. [2022-12-14 06:52:29,333 INFO L78 Accepts]: Start accepts. Automaton has 264819 states and 397265 transitions. Word has length 202 [2022-12-14 06:52:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:29,333 INFO L495 AbstractCegarLoop]: Abstraction has 264819 states and 397265 transitions. [2022-12-14 06:52:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 06:52:29,333 INFO L276 IsEmpty]: Start isEmpty. Operand 264819 states and 397265 transitions. [2022-12-14 06:52:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-12-14 06:52:29,935 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:29,935 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:29,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 06:52:30,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 06:52:30,137 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:30,138 INFO L85 PathProgramCache]: Analyzing trace with hash 694254342, now seen corresponding path program 1 times [2022-12-14 06:52:30,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:30,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942151947] [2022-12-14 06:52:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:30,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 06:52:30,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:30,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942151947] [2022-12-14 06:52:30,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942151947] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:52:30,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604472491] [2022-12-14 06:52:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:30,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:30,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:30,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:52:30,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:52:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:30,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:52:30,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:52:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 06:52:30,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:52:30,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604472491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:52:30,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:52:30,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 06:52:30,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653242069] [2022-12-14 06:52:30,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:52:30,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:52:30,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:30,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:52:30,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:52:30,659 INFO L87 Difference]: Start difference. First operand 264819 states and 397265 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 06:52:53,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:53,893 INFO L93 Difference]: Finished difference Result 786556 states and 1191898 transitions. [2022-12-14 06:52:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:52:53,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 202 [2022-12-14 06:52:53,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:55,683 INFO L225 Difference]: With dead ends: 786556 [2022-12-14 06:52:55,683 INFO L226 Difference]: Without dead ends: 523383 [2022-12-14 06:52:56,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:52:56,184 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3445 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:56,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:52:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523383 states. [2022-12-14 06:53:19,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523383 to 521075. [2022-12-14 06:53:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521075 states, 450923 states have (on average 1.5015046914883472) internal successors, (677063), 452462 states have internal predecessors, (677063), 50182 states have call successors, (50182), 19969 states have call predecessors, (50182), 19968 states have return successors, (50180), 48644 states have call predecessors, (50180), 50180 states have call successors, (50180) [2022-12-14 06:53:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521075 states to 521075 states and 777425 transitions. [2022-12-14 06:53:22,161 INFO L78 Accepts]: Start accepts. Automaton has 521075 states and 777425 transitions. Word has length 202 [2022-12-14 06:53:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:53:22,161 INFO L495 AbstractCegarLoop]: Abstraction has 521075 states and 777425 transitions. [2022-12-14 06:53:22,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 06:53:22,162 INFO L276 IsEmpty]: Start isEmpty. Operand 521075 states and 777425 transitions. [2022-12-14 06:53:23,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-12-14 06:53:23,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:53:23,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:53:23,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 06:53:23,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 06:53:23,516 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:53:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:53:23,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1439254764, now seen corresponding path program 1 times [2022-12-14 06:53:23,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:53:23,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40120177] [2022-12-14 06:53:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:53:23,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:53:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:53:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 06:53:23,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:53:23,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40120177] [2022-12-14 06:53:23,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40120177] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:53:23,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30979441] [2022-12-14 06:53:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:53:23,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:53:23,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:53:23,860 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:53:23,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:53:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:53:24,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:53:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:53:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 06:53:24,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:53:24,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30979441] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:53:24,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:53:24,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 06:53:24,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053092440] [2022-12-14 06:53:24,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:53:24,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:53:24,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:53:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:53:24,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:53:24,161 INFO L87 Difference]: Start difference. First operand 521075 states and 777425 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 06:54:09,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:54:09,472 INFO L93 Difference]: Finished difference Result 1550716 states and 2337498 transitions. [2022-12-14 06:54:09,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:54:09,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 202 [2022-12-14 06:54:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:54:13,517 INFO L225 Difference]: With dead ends: 1550716 [2022-12-14 06:54:13,517 INFO L226 Difference]: Without dead ends: 1031287 [2022-12-14 06:54:15,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:54:15,073 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3445 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:54:15,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:54:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031287 states. [2022-12-14 06:55:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031287 to 1026675. [2022-12-14 06:55:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026675 states, 889451 states have (on average 1.4945747432967078) internal successors, (1329351), 892526 states have internal predecessors, (1329351), 97286 states have call successors, (97286), 39937 states have call predecessors, (97286), 39936 states have return successors, (97284), 94212 states have call predecessors, (97284), 97284 states have call successors, (97284) [2022-12-14 06:55:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026675 states to 1026675 states and 1523921 transitions. [2022-12-14 06:55:09,508 INFO L78 Accepts]: Start accepts. Automaton has 1026675 states and 1523921 transitions. Word has length 202 [2022-12-14 06:55:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:55:09,509 INFO L495 AbstractCegarLoop]: Abstraction has 1026675 states and 1523921 transitions. [2022-12-14 06:55:09,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 06:55:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1026675 states and 1523921 transitions. [2022-12-14 06:55:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-12-14 06:55:12,022 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:55:12,022 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:55:12,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 06:55:12,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 06:55:12,224 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:55:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:55:12,226 INFO L85 PathProgramCache]: Analyzing trace with hash 372196152, now seen corresponding path program 1 times [2022-12-14 06:55:12,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:55:12,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719157197] [2022-12-14 06:55:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:55:12,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:55:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:55:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 06:55:12,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:55:12,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719157197] [2022-12-14 06:55:12,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719157197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:55:12,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601913955] [2022-12-14 06:55:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:55:12,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:55:12,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:55:12,526 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:55:12,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78cecb81-4088-41dc-84f6-303c36270614/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:55:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:55:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:55:12,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:55:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 06:55:12,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:55:12,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601913955] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:55:12,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:55:12,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 06:55:12,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109770660] [2022-12-14 06:55:12,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:55:12,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:55:12,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:55:12,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:55:12,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:55:12,820 INFO L87 Difference]: Start difference. First operand 1026675 states and 1523921 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)