./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur --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 656e7d531f093f57119c43761759c34009a10647aaa5132e17630f3bef948c7c --- 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-38b53e6 [2022-11-25 23:31:01,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:31:01,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:31:01,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:31:01,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:31:01,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:31:01,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:31:01,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:31:01,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:31:01,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:31:01,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:31:01,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:31:01,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:31:01,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:31:01,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:31:01,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:31:01,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:31:01,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:31:01,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:31:01,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:31:01,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:31:01,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:31:01,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:31:01,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:31:01,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:31:01,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:31:01,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:31:01,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:31:01,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:31:01,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:31:01,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:31:01,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:31:01,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:31:01,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:31:01,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:31:01,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:31:01,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:31:01,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:31:01,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:31:01,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:31:02,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:31:02,001 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:31:02,037 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:31:02,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:31:02,038 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:31:02,039 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:31:02,039 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:31:02,040 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:31:02,040 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:31:02,040 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:31:02,040 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:31:02,040 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:31:02,041 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:31:02,049 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:31:02,049 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:31:02,050 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:31:02,050 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:31:02,050 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:31:02,050 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:31:02,050 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:31:02,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:31:02,051 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:31:02,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:31:02,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:31:02,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:31:02,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:31:02,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:31:02,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:31:02,053 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:31:02,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:31:02,053 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:31:02,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:31:02,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:31:02,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:31:02,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:31:02,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:31:02,055 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:31:02,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:31:02,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:31:02,055 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:31:02,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:31:02,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:31:02,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:31:02,056 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_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 656e7d531f093f57119c43761759c34009a10647aaa5132e17630f3bef948c7c [2022-11-25 23:31:02,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:31:02,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:31:02,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:31:02,367 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:31:02,367 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:31:02,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c [2022-11-25 23:31:05,381 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:31:06,149 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:31:06,150 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c [2022-11-25 23:31:06,204 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/data/bc7c6c007/51849eb9ba6d49b2969884fd5adbe806/FLAG9e1bde7b6 [2022-11-25 23:31:06,462 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/data/bc7c6c007/51849eb9ba6d49b2969884fd5adbe806 [2022-11-25 23:31:06,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:31:06,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:31:06,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:31:06,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:31:06,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:31:06,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:31:06" (1/1) ... [2022-11-25 23:31:06,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2283a268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:06, skipping insertion in model container [2022-11-25 23:31:06,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:31:06" (1/1) ... [2022-11-25 23:31:06,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:31:06,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:31:08,974 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_4f08082b-7a75-4fb3-9002-a080505a4124/sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c[376251,376264] [2022-11-25 23:31:09,009 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_4f08082b-7a75-4fb3-9002-a080505a4124/sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c[383339,383352] [2022-11-25 23:31:09,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:31:09,263 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:31:10,543 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_4f08082b-7a75-4fb3-9002-a080505a4124/sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c[376251,376264] [2022-11-25 23:31:10,558 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_4f08082b-7a75-4fb3-9002-a080505a4124/sv-benchmarks/c/combinations/Problem05_label41+token_ring.05.cil-1.c[383339,383352] [2022-11-25 23:31:10,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:31:10,638 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:31:10,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10 WrapperNode [2022-11-25 23:31:10,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:31:10,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:31:10,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:31:10,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:31:10,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10" (1/1) ... [2022-11-25 23:31:10,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10" (1/1) ... [2022-11-25 23:31:11,151 INFO L138 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12793 [2022-11-25 23:31:11,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:31:11,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:31:11,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:31:11,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:31:11,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10" (1/1) ... [2022-11-25 23:31:11,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10" (1/1) ... [2022-11-25 23:31:11,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10" (1/1) ... [2022-11-25 23:31:11,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10" (1/1) ... [2022-11-25 23:31:11,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10" (1/1) ... [2022-11-25 23:31:11,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10" (1/1) ... [2022-11-25 23:31:11,678 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10" (1/1) ... [2022-11-25 23:31:11,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10" (1/1) ... [2022-11-25 23:31:11,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:31:11,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:31:11,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:31:11,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:31:11,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10" (1/1) ... [2022-11-25 23:31:11,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:31:11,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:11,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:31:11,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:31:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:31:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-25 23:31:11,872 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-25 23:31:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-25 23:31:11,872 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-25 23:31:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-25 23:31:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-25 23:31:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-25 23:31:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-25 23:31:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-25 23:31:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-25 23:31:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-25 23:31:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-25 23:31:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:31:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:31:11,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:31:12,061 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:31:12,063 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:31:21,412 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:31:24,123 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:31:24,123 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-25 23:31:24,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:31:24 BoogieIcfgContainer [2022-11-25 23:31:24,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:31:24,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:31:24,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:31:24,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:31:24,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:31:06" (1/3) ... [2022-11-25 23:31:24,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a0009a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:31:24, skipping insertion in model container [2022-11-25 23:31:24,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:31:10" (2/3) ... [2022-11-25 23:31:24,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a0009a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:31:24, skipping insertion in model container [2022-11-25 23:31:24,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:31:24" (3/3) ... [2022-11-25 23:31:24,137 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label41+token_ring.05.cil-1.c [2022-11-25 23:31:24,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:31:24,158 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 23:31:24,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:31:24,267 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;@6999bfe5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:31:24,267 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 23:31:24,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 23:31:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 23:31:24,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:24,296 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] [2022-11-25 23:31:24,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash -177775814, now seen corresponding path program 1 times [2022-11-25 23:31:24,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:24,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830873699] [2022-11-25 23:31:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:24,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:31:24,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:24,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830873699] [2022-11-25 23:31:24,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830873699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:24,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:31:24,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:31:24,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640564315] [2022-11-25 23:31:24,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:24,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:31:24,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:24,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:31:24,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:31:24,788 INFO L87 Difference]: Start difference. First operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:31:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:25,908 INFO L93 Difference]: Finished difference Result 3602 states and 7035 transitions. [2022-11-25 23:31:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:31:25,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-11-25 23:31:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:25,930 INFO L225 Difference]: With dead ends: 3602 [2022-11-25 23:31:25,930 INFO L226 Difference]: Without dead ends: 1847 [2022-11-25 23:31:25,937 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 [2022-11-25 23:31:25,940 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3548 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3548 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:25,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3548 Valid, 6532 Invalid, 628 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:31:25,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2022-11-25 23:31:26,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1846. [2022-11-25 23:31:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1798 states have (on average 1.9443826473859844) internal successors, (3496), 1801 states have internal predecessors, (3496), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-25 23:31:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 3564 transitions. [2022-11-25 23:31:26,093 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 3564 transitions. Word has length 46 [2022-11-25 23:31:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:26,094 INFO L495 AbstractCegarLoop]: Abstraction has 1846 states and 3564 transitions. [2022-11-25 23:31:26,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:31:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 3564 transitions. [2022-11-25 23:31:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:31:26,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:26,098 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:26,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:31:26,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:26,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1286885214, now seen corresponding path program 1 times [2022-11-25 23:31:26,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:26,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907182154] [2022-11-25 23:31:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:26,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:31:26,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:26,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907182154] [2022-11-25 23:31:26,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907182154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:26,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847650127] [2022-11-25 23:31:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:26,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:26,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:26,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:26,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:31:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:31:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:31:26,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:31:26,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847650127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:26,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:31:26,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:31:26,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103708683] [2022-11-25 23:31:26,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:26,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:31:26,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:26,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:31:26,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:31:26,652 INFO L87 Difference]: Start difference. First operand 1846 states and 3564 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:31:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:27,139 INFO L93 Difference]: Finished difference Result 2239 states and 4145 transitions. [2022-11-25 23:31:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:31:27,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-11-25 23:31:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:27,151 INFO L225 Difference]: With dead ends: 2239 [2022-11-25 23:31:27,152 INFO L226 Difference]: Without dead ends: 2039 [2022-11-25 23:31:27,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:31:27,156 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3393 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3344 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:27,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3344 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:31:27,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2022-11-25 23:31:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 2035. [2022-11-25 23:31:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1947 states have (on average 1.9049820236260915) internal successors, (3709), 1951 states have internal predecessors, (3709), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-25 23:31:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 3833 transitions. [2022-11-25 23:31:27,233 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 3833 transitions. Word has length 87 [2022-11-25 23:31:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:27,234 INFO L495 AbstractCegarLoop]: Abstraction has 2035 states and 3833 transitions. [2022-11-25 23:31:27,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:31:27,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 3833 transitions. [2022-11-25 23:31:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:31:27,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:27,243 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:27,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:27,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:27,450 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:27,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1979010212, now seen corresponding path program 1 times [2022-11-25 23:31:27,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:27,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461765219] [2022-11-25 23:31:27,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:27,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:31:27,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:27,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461765219] [2022-11-25 23:31:27,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461765219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:27,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698491678] [2022-11-25 23:31:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:27,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:27,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:27,586 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:27,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:31:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:27,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:31:27,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:31:27,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:31:27,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698491678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:27,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:31:27,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:31:27,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913677158] [2022-11-25 23:31:27,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:27,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:31:27,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:27,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:31:27,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:31:27,889 INFO L87 Difference]: Start difference. First operand 2035 states and 3833 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:31:28,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:28,420 INFO L93 Difference]: Finished difference Result 2800 states and 4956 transitions. [2022-11-25 23:31:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:31:28,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-11-25 23:31:28,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:28,432 INFO L225 Difference]: With dead ends: 2800 [2022-11-25 23:31:28,432 INFO L226 Difference]: Without dead ends: 2411 [2022-11-25 23:31:28,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:31:28,436 INFO L413 NwaCegarLoop]: 3223 mSDtfsCounter, 3402 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3402 SdHoareTripleChecker+Valid, 3343 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:28,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3402 Valid, 3343 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:31:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2022-11-25 23:31:28,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2405. [2022-11-25 23:31:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2239 states have (on average 1.8414470745868692) internal successors, (4123), 2245 states have internal predecessors, (4123), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-25 23:31:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 4355 transitions. [2022-11-25 23:31:28,517 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 4355 transitions. Word has length 87 [2022-11-25 23:31:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:28,517 INFO L495 AbstractCegarLoop]: Abstraction has 2405 states and 4355 transitions. [2022-11-25 23:31:28,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:31:28,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 4355 transitions. [2022-11-25 23:31:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:31:28,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:28,521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:28,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:28,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:28,736 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:28,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1257116386, now seen corresponding path program 1 times [2022-11-25 23:31:28,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:28,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571225890] [2022-11-25 23:31:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:28,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:31:28,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:28,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571225890] [2022-11-25 23:31:28,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571225890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:28,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179742158] [2022-11-25 23:31:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:28,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:28,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:28,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:28,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:31:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:29,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:31:29,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:31:29,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:31:29,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179742158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:29,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:31:29,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:31:29,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289119696] [2022-11-25 23:31:29,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:29,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:31:29,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:31:29,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:31:29,201 INFO L87 Difference]: Start difference. First operand 2405 states and 4355 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:31:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:29,927 INFO L93 Difference]: Finished difference Result 3898 states and 6528 transitions. [2022-11-25 23:31:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:31:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-11-25 23:31:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:29,947 INFO L225 Difference]: With dead ends: 3898 [2022-11-25 23:31:29,948 INFO L226 Difference]: Without dead ends: 3139 [2022-11-25 23:31:29,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:31:29,957 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 3399 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:29,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 3318 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:31:29,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2022-11-25 23:31:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3129. [2022-11-25 23:31:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 2811 states have (on average 1.7527570259694059) internal successors, (4927), 2821 states have internal predecessors, (4927), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2022-11-25 23:31:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 5367 transitions. [2022-11-25 23:31:30,110 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 5367 transitions. Word has length 87 [2022-11-25 23:31:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:30,113 INFO L495 AbstractCegarLoop]: Abstraction has 3129 states and 5367 transitions. [2022-11-25 23:31:30,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:31:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 5367 transitions. [2022-11-25 23:31:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:31:30,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:30,119 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:30,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 23:31:30,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-25 23:31:30,324 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:30,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1623139684, now seen corresponding path program 1 times [2022-11-25 23:31:30,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:30,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167427001] [2022-11-25 23:31:30,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:30,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 23:31:30,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167427001] [2022-11-25 23:31:30,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167427001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:30,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:31:30,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:31:30,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021278873] [2022-11-25 23:31:30,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:30,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:31:30,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:30,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:31:30,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:31:30,413 INFO L87 Difference]: Start difference. First operand 3129 states and 5367 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:31:31,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:31,009 INFO L93 Difference]: Finished difference Result 4283 states and 7048 transitions. [2022-11-25 23:31:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:31:31,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2022-11-25 23:31:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:31,025 INFO L225 Difference]: With dead ends: 4283 [2022-11-25 23:31:31,026 INFO L226 Difference]: Without dead ends: 3521 [2022-11-25 23:31:31,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:31:31,030 INFO L413 NwaCegarLoop]: 3252 mSDtfsCounter, 64 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6442 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:31,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6442 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:31:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2022-11-25 23:31:31,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 3373. [2022-11-25 23:31:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3039 states have (on average 1.7476143468246133) internal successors, (5311), 3049 states have internal predecessors, (5311), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2022-11-25 23:31:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 5767 transitions. [2022-11-25 23:31:31,159 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 5767 transitions. Word has length 87 [2022-11-25 23:31:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:31,160 INFO L495 AbstractCegarLoop]: Abstraction has 3373 states and 5767 transitions. [2022-11-25 23:31:31,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:31:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 5767 transitions. [2022-11-25 23:31:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-25 23:31:31,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:31,166 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:31,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:31:31,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:31,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1349387760, now seen corresponding path program 1 times [2022-11-25 23:31:31,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:31,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880012377] [2022-11-25 23:31:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:31,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-25 23:31:31,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880012377] [2022-11-25 23:31:31,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880012377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:31,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:31:31,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:31:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64487514] [2022-11-25 23:31:31,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:31,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:31:31,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:31:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:31:31,249 INFO L87 Difference]: Start difference. First operand 3373 states and 5767 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:31:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:31,815 INFO L93 Difference]: Finished difference Result 6754 states and 10724 transitions. [2022-11-25 23:31:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:31:31,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-11-25 23:31:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:31,838 INFO L225 Difference]: With dead ends: 6754 [2022-11-25 23:31:31,838 INFO L226 Difference]: Without dead ends: 5027 [2022-11-25 23:31:31,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:31:31,846 INFO L413 NwaCegarLoop]: 3200 mSDtfsCounter, 3393 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:31,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3320 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:31:31,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2022-11-25 23:31:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 5001. [2022-11-25 23:31:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 4355 states have (on average 1.6512055109070034) internal successors, (7191), 4373 states have internal predecessors, (7191), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-11-25 23:31:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 8063 transitions. [2022-11-25 23:31:32,054 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 8063 transitions. Word has length 116 [2022-11-25 23:31:32,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:32,055 INFO L495 AbstractCegarLoop]: Abstraction has 5001 states and 8063 transitions. [2022-11-25 23:31:32,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:31:32,056 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 8063 transitions. [2022-11-25 23:31:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-25 23:31:32,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:32,065 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:31:32,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:31:32,065 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:32,066 INFO L85 PathProgramCache]: Analyzing trace with hash 177560837, now seen corresponding path program 1 times [2022-11-25 23:31:32,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:32,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289177843] [2022-11-25 23:31:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:32,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-25 23:31:32,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:32,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289177843] [2022-11-25 23:31:32,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289177843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:32,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:31:32,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:31:32,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446324576] [2022-11-25 23:31:32,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:32,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:31:32,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:32,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:31:32,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:31:32,148 INFO L87 Difference]: Start difference. First operand 5001 states and 8063 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:31:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:33,003 INFO L93 Difference]: Finished difference Result 11566 states and 17572 transitions. [2022-11-25 23:31:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:31:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-11-25 23:31:33,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:33,070 INFO L225 Difference]: With dead ends: 11566 [2022-11-25 23:31:33,071 INFO L226 Difference]: Without dead ends: 8211 [2022-11-25 23:31:33,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:31:33,085 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 3396 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3396 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:33,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3396 Valid, 3334 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:31:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8211 states. [2022-11-25 23:31:33,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8211 to 8161. [2022-11-25 23:31:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8161 states, 6907 states have (on average 1.5623280729694513) internal successors, (10791), 6941 states have internal predecessors, (10791), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2022-11-25 23:31:33,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8161 states to 8161 states and 12463 transitions. [2022-11-25 23:31:33,635 INFO L78 Accepts]: Start accepts. Automaton has 8161 states and 12463 transitions. Word has length 116 [2022-11-25 23:31:33,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:33,635 INFO L495 AbstractCegarLoop]: Abstraction has 8161 states and 12463 transitions. [2022-11-25 23:31:33,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 23:31:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 8161 states and 12463 transitions. [2022-11-25 23:31:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-25 23:31:33,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:33,669 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, 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] [2022-11-25 23:31:33,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:31:33,669 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1980730194, now seen corresponding path program 1 times [2022-11-25 23:31:33,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:33,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17529790] [2022-11-25 23:31:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:33,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-25 23:31:33,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:33,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17529790] [2022-11-25 23:31:33,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17529790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:33,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071571680] [2022-11-25 23:31:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:33,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:33,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:33,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:33,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:31:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:34,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:31:34,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:31:34,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:31:34,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071571680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:31:34,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:31:34,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-25 23:31:34,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966889798] [2022-11-25 23:31:34,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:31:34,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:31:34,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:31:34,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:31:34,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:31:34,145 INFO L87 Difference]: Start difference. First operand 8161 states and 12463 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-25 23:31:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:31:35,185 INFO L93 Difference]: Finished difference Result 13957 states and 20833 transitions. [2022-11-25 23:31:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:31:35,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2022-11-25 23:31:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:31:35,243 INFO L225 Difference]: With dead ends: 13957 [2022-11-25 23:31:35,243 INFO L226 Difference]: Without dead ends: 10627 [2022-11-25 23:31:35,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:31:35,260 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 95 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 6468 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:31:35,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 6468 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:31:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10627 states. [2022-11-25 23:31:35,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10627 to 9393. [2022-11-25 23:31:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9393 states, 8043 states have (on average 1.5744125326370757) internal successors, (12663), 8077 states have internal predecessors, (12663), 884 states have call successors, (884), 464 states have call predecessors, (884), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2022-11-25 23:31:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9393 states to 9393 states and 14431 transitions. [2022-11-25 23:31:35,977 INFO L78 Accepts]: Start accepts. Automaton has 9393 states and 14431 transitions. Word has length 134 [2022-11-25 23:31:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:31:35,979 INFO L495 AbstractCegarLoop]: Abstraction has 9393 states and 14431 transitions. [2022-11-25 23:31:35,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-25 23:31:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 9393 states and 14431 transitions. [2022-11-25 23:31:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-25 23:31:36,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:31:36,005 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, 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] [2022-11-25 23:31:36,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:31:36,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:36,211 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:31:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:31:36,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1835424819, now seen corresponding path program 2 times [2022-11-25 23:31:36,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:31:36,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933554289] [2022-11-25 23:31:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:31:36,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:31:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:31:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-25 23:31:36,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:31:36,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933554289] [2022-11-25 23:31:36,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933554289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:31:36,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264638055] [2022-11-25 23:31:36,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:31:36,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:31:36,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:31:36,543 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:31:36,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f08082b-7a75-4fb3-9002-a080505a4124/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:31:36,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:31:36,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:31:36,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:31:36,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:31:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:31:37,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:31:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 23:31:37,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264638055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:31:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1059267537] [2022-11-25 23:31:37,575 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-25 23:31:37,575 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:31:37,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:31:37,584 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:31:37,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:32:06,793 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 157 for LOIs [2022-11-25 23:32:06,835 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-11-25 23:32:13,157 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12