./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW --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 c5f603027c62ff37561a520351662dbe2fd253b52e04e36028cb9a624978ef8e --- 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-4e7fbc6 [2022-11-23 14:11:49,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:11:49,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:11:49,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:11:49,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:11:49,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:11:49,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:11:49,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:11:49,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:11:49,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:11:49,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:11:49,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:11:49,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:11:49,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:11:49,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:11:49,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:11:49,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:11:49,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:11:49,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:11:49,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:11:49,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:11:49,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:11:49,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:11:49,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:11:49,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:11:49,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:11:49,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:11:49,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:11:49,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:11:49,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:11:49,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:11:49,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:11:49,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:11:49,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:11:49,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:11:49,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:11:49,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:11:49,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:11:49,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:11:49,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:11:49,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:11:49,181 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:11:49,227 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:11:49,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:11:49,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:11:49,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:11:49,230 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:11:49,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:11:49,230 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:11:49,231 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:11:49,231 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:11:49,231 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:11:49,233 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:11:49,233 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:11:49,233 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:11:49,234 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:11:49,234 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:11:49,234 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:11:49,235 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:11:49,235 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:11:49,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:11:49,236 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:11:49,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:11:49,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:11:49,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:11:49,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:11:49,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:11:49,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:11:49,239 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:11:49,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:11:49,240 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:11:49,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:11:49,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:11:49,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:11:49,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:11:49,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:11:49,242 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:11:49,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:11:49,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:11:49,242 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:11:49,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:11:49,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:11:49,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:11:49,243 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_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c5f603027c62ff37561a520351662dbe2fd253b52e04e36028cb9a624978ef8e [2022-11-23 14:11:49,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:11:49,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:11:49,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:11:49,669 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:11:49,670 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:11:49,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/systemc/token_ring.11.cil-2.c [2022-11-23 14:11:53,003 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:11:53,273 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:11:53,274 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/sv-benchmarks/c/systemc/token_ring.11.cil-2.c [2022-11-23 14:11:53,291 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/data/a1f853af2/a16e84eec8a249d19ef1b985c2f1e94c/FLAG9690fb232 [2022-11-23 14:11:53,325 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/data/a1f853af2/a16e84eec8a249d19ef1b985c2f1e94c [2022-11-23 14:11:53,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:11:53,334 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:11:53,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:11:53,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:11:53,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:11:53,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:53" (1/1) ... [2022-11-23 14:11:53,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13c2454e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:53, skipping insertion in model container [2022-11-23 14:11:53,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:53" (1/1) ... [2022-11-23 14:11:53,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:11:53,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:11:53,727 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_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/sv-benchmarks/c/systemc/token_ring.11.cil-2.c[671,684] [2022-11-23 14:11:53,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:11:53,939 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:11:53,967 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_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/sv-benchmarks/c/systemc/token_ring.11.cil-2.c[671,684] [2022-11-23 14:11:54,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:11:54,061 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:11:54,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54 WrapperNode [2022-11-23 14:11:54,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:11:54,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:11:54,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:11:54,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:11:54,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54" (1/1) ... [2022-11-23 14:11:54,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54" (1/1) ... [2022-11-23 14:11:54,176 INFO L138 Inliner]: procedures = 50, calls = 64, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 795 [2022-11-23 14:11:54,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:11:54,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:11:54,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:11:54,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:11:54,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54" (1/1) ... [2022-11-23 14:11:54,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54" (1/1) ... [2022-11-23 14:11:54,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54" (1/1) ... [2022-11-23 14:11:54,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54" (1/1) ... [2022-11-23 14:11:54,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54" (1/1) ... [2022-11-23 14:11:54,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54" (1/1) ... [2022-11-23 14:11:54,278 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54" (1/1) ... [2022-11-23 14:11:54,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54" (1/1) ... [2022-11-23 14:11:54,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:11:54,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:11:54,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:11:54,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:11:54,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54" (1/1) ... [2022-11-23 14:11:54,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:11:54,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:54,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:11:54,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:11:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:11:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-23 14:11:54,432 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-23 14:11:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 14:11:54,432 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 14:11:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-23 14:11:54,433 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-23 14:11:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-23 14:11:54,433 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-23 14:11:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-23 14:11:54,433 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-23 14:11:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-23 14:11:54,434 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-23 14:11:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:11:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:11:54,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:11:54,630 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:11:54,649 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:11:55,709 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:11:56,310 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:11:56,310 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-23 14:11:56,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:56 BoogieIcfgContainer [2022-11-23 14:11:56,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:11:56,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:11:56,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:11:56,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:11:56,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:11:53" (1/3) ... [2022-11-23 14:11:56,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70bad2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:56, skipping insertion in model container [2022-11-23 14:11:56,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:54" (2/3) ... [2022-11-23 14:11:56,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70bad2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:56, skipping insertion in model container [2022-11-23 14:11:56,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:56" (3/3) ... [2022-11-23 14:11:56,327 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.11.cil-2.c [2022-11-23 14:11:56,353 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:11:56,354 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:11:56,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:11:56,434 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;@3e86f49a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:11:56,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:11:56,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 144 states have (on average 1.5555555555555556) internal successors, (224), 146 states have internal predecessors, (224), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-23 14:11:56,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 14:11:56,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:56,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:56,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:56,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:56,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1290656416, now seen corresponding path program 1 times [2022-11-23 14:11:56,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:56,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17582616] [2022-11-23 14:11:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:56,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:11:57,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:57,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17582616] [2022-11-23 14:11:57,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17582616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:57,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:11:57,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:11:57,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098989889] [2022-11-23 14:11:57,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:57,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:11:57,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:11:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:11:57,186 INFO L87 Difference]: Start difference. First operand has 177 states, 144 states have (on average 1.5555555555555556) internal successors, (224), 146 states have internal predecessors, (224), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2022-11-23 14:11:57,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:57,915 INFO L93 Difference]: Finished difference Result 515 states and 813 transitions. [2022-11-23 14:11:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:11:57,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 63 [2022-11-23 14:11:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:57,932 INFO L225 Difference]: With dead ends: 515 [2022-11-23 14:11:57,933 INFO L226 Difference]: Without dead ends: 339 [2022-11-23 14:11:57,939 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 [2022-11-23 14:11:57,958 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 479 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:57,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 754 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:11:57,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-23 14:11:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 338. [2022-11-23 14:11:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 279 states have (on average 1.5197132616487454) internal successors, (424), 281 states have internal predecessors, (424), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-23 14:11:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 516 transitions. [2022-11-23 14:11:58,099 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 516 transitions. Word has length 63 [2022-11-23 14:11:58,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:58,101 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 516 transitions. [2022-11-23 14:11:58,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2022-11-23 14:11:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 516 transitions. [2022-11-23 14:11:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-23 14:11:58,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:58,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:58,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:11:58,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:58,120 INFO L85 PathProgramCache]: Analyzing trace with hash 523458760, now seen corresponding path program 1 times [2022-11-23 14:11:58,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:58,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520601346] [2022-11-23 14:11:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:58,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:11:58,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:58,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520601346] [2022-11-23 14:11:58,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520601346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:58,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559007398] [2022-11-23 14:11:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:58,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:58,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:58,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:58,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:11:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:58,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:11:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:11:58,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:58,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559007398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:58,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:11:58,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:11:58,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067613137] [2022-11-23 14:11:58,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:58,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:11:58,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:58,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:11:58,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:11:58,986 INFO L87 Difference]: Start difference. First operand 338 states and 516 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2022-11-23 14:11:59,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:59,246 INFO L93 Difference]: Finished difference Result 997 states and 1549 transitions. [2022-11-23 14:11:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:11:59,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 128 [2022-11-23 14:11:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:59,267 INFO L225 Difference]: With dead ends: 997 [2022-11-23 14:11:59,267 INFO L226 Difference]: Without dead ends: 664 [2022-11-23 14:11:59,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:11:59,276 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 223 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:59,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 482 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:11:59,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-11-23 14:11:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 660. [2022-11-23 14:11:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 549 states have (on average 1.517304189435337) internal successors, (833), 552 states have internal predecessors, (833), 86 states have call successors, (86), 24 states have call predecessors, (86), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-23 14:11:59,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1005 transitions. [2022-11-23 14:11:59,369 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1005 transitions. Word has length 128 [2022-11-23 14:11:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:59,369 INFO L495 AbstractCegarLoop]: Abstraction has 660 states and 1005 transitions. [2022-11-23 14:11:59,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2022-11-23 14:11:59,370 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1005 transitions. [2022-11-23 14:11:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-23 14:11:59,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:59,378 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:59,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 14:11:59,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 14:11:59,586 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:59,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:59,587 INFO L85 PathProgramCache]: Analyzing trace with hash 487871370, now seen corresponding path program 1 times [2022-11-23 14:11:59,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:59,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790143277] [2022-11-23 14:11:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:59,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:11:59,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:59,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790143277] [2022-11-23 14:11:59,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790143277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:59,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514843463] [2022-11-23 14:11:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:59,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:59,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:59,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:59,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:12:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:00,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:12:00,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 14:12:00,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:12:00,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514843463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:00,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:12:00,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:12:00,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076607772] [2022-11-23 14:12:00,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:00,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:00,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:00,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:00,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:12:00,243 INFO L87 Difference]: Start difference. First operand 660 states and 1005 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2022-11-23 14:12:00,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:00,465 INFO L93 Difference]: Finished difference Result 1957 states and 3032 transitions. [2022-11-23 14:12:00,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:00,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 128 [2022-11-23 14:12:00,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:00,473 INFO L225 Difference]: With dead ends: 1957 [2022-11-23 14:12:00,474 INFO L226 Difference]: Without dead ends: 1302 [2022-11-23 14:12:00,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:12:00,478 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 235 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:00,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 481 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:00,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2022-11-23 14:12:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1296. [2022-11-23 14:12:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1083 states have (on average 1.5133887349953832) internal successors, (1639), 1088 states have internal predecessors, (1639), 164 states have call successors, (164), 48 states have call predecessors, (164), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2022-11-23 14:12:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1967 transitions. [2022-11-23 14:12:00,569 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1967 transitions. Word has length 128 [2022-11-23 14:12:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:00,570 INFO L495 AbstractCegarLoop]: Abstraction has 1296 states and 1967 transitions. [2022-11-23 14:12:00,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2022-11-23 14:12:00,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1967 transitions. [2022-11-23 14:12:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-23 14:12:00,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:00,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:00,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:00,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:00,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:00,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:00,832 INFO L85 PathProgramCache]: Analyzing trace with hash -23512244, now seen corresponding path program 1 times [2022-11-23 14:12:00,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:00,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622350647] [2022-11-23 14:12:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:00,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:12:01,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:01,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622350647] [2022-11-23 14:12:01,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622350647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:01,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861757783] [2022-11-23 14:12:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:01,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:01,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:01,065 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:01,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:12:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:01,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:12:01,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 14:12:01,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:12:01,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861757783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:01,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:12:01,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:12:01,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828166476] [2022-11-23 14:12:01,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:01,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:01,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:01,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:01,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:12:01,413 INFO L87 Difference]: Start difference. First operand 1296 states and 1967 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2022-11-23 14:12:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:01,688 INFO L93 Difference]: Finished difference Result 3853 states and 5948 transitions. [2022-11-23 14:12:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:01,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 128 [2022-11-23 14:12:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:01,717 INFO L225 Difference]: With dead ends: 3853 [2022-11-23 14:12:01,717 INFO L226 Difference]: Without dead ends: 2562 [2022-11-23 14:12:01,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:12:01,758 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 244 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:01,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 469 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:01,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2022-11-23 14:12:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2552. [2022-11-23 14:12:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2139 states have (on average 1.5086489013557738) internal successors, (3227), 2148 states have internal predecessors, (3227), 316 states have call successors, (316), 96 states have call predecessors, (316), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2022-11-23 14:12:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 3859 transitions. [2022-11-23 14:12:01,994 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 3859 transitions. Word has length 128 [2022-11-23 14:12:01,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:01,995 INFO L495 AbstractCegarLoop]: Abstraction has 2552 states and 3859 transitions. [2022-11-23 14:12:01,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2022-11-23 14:12:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 3859 transitions. [2022-11-23 14:12:02,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-23 14:12:02,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:02,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:02,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:02,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:02,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:02,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:02,219 INFO L85 PathProgramCache]: Analyzing trace with hash -162533942, now seen corresponding path program 1 times [2022-11-23 14:12:02,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:02,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093724302] [2022-11-23 14:12:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:02,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:12:02,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:02,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093724302] [2022-11-23 14:12:02,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093724302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:02,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897605784] [2022-11-23 14:12:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:02,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:02,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:02,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:02,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:12:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:02,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:12:02,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:12:02,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:12:02,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897605784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:02,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:12:02,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:12:02,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044192212] [2022-11-23 14:12:02,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:02,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:02,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:02,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:02,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:12:02,737 INFO L87 Difference]: Start difference. First operand 2552 states and 3859 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2022-11-23 14:12:03,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:03,162 INFO L93 Difference]: Finished difference Result 7597 states and 11680 transitions. [2022-11-23 14:12:03,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:03,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 128 [2022-11-23 14:12:03,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:03,191 INFO L225 Difference]: With dead ends: 7597 [2022-11-23 14:12:03,191 INFO L226 Difference]: Without dead ends: 5050 [2022-11-23 14:12:03,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:12:03,204 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 241 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:03,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 479 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2022-11-23 14:12:03,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 5032. [2022-11-23 14:12:03,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5032 states, 4227 states have (on average 1.5034303288384196) internal successors, (6355), 4244 states have internal predecessors, (6355), 612 states have call successors, (612), 192 states have call predecessors, (612), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2022-11-23 14:12:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5032 states to 5032 states and 7579 transitions. [2022-11-23 14:12:03,611 INFO L78 Accepts]: Start accepts. Automaton has 5032 states and 7579 transitions. Word has length 128 [2022-11-23 14:12:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:03,612 INFO L495 AbstractCegarLoop]: Abstraction has 5032 states and 7579 transitions. [2022-11-23 14:12:03,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2022-11-23 14:12:03,612 INFO L276 IsEmpty]: Start isEmpty. Operand 5032 states and 7579 transitions. [2022-11-23 14:12:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-23 14:12:03,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:03,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:03,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:03,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:03,832 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:03,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2059697164, now seen corresponding path program 1 times [2022-11-23 14:12:03,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:03,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994172030] [2022-11-23 14:12:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:03,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:12:04,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:04,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994172030] [2022-11-23 14:12:04,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994172030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:04,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963741281] [2022-11-23 14:12:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:04,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:04,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:04,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:04,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:12:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:04,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:12:04,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:12:04,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:12:04,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963741281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:04,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:12:04,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:12:04,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681029746] [2022-11-23 14:12:04,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:04,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:04,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:04,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:04,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:12:04,381 INFO L87 Difference]: Start difference. First operand 5032 states and 7579 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2022-11-23 14:12:05,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:05,075 INFO L93 Difference]: Finished difference Result 14989 states and 22944 transitions. [2022-11-23 14:12:05,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:05,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 128 [2022-11-23 14:12:05,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:05,158 INFO L225 Difference]: With dead ends: 14989 [2022-11-23 14:12:05,158 INFO L226 Difference]: Without dead ends: 9962 [2022-11-23 14:12:05,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:12:05,184 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 229 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:05,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 451 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9962 states. [2022-11-23 14:12:05,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9962 to 9928. [2022-11-23 14:12:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9928 states, 8355 states have (on average 1.4979054458408139) internal successors, (12515), 8388 states have internal predecessors, (12515), 1188 states have call successors, (1188), 384 states have call predecessors, (1188), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2022-11-23 14:12:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9928 states to 9928 states and 14891 transitions. [2022-11-23 14:12:06,011 INFO L78 Accepts]: Start accepts. Automaton has 9928 states and 14891 transitions. Word has length 128 [2022-11-23 14:12:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:06,014 INFO L495 AbstractCegarLoop]: Abstraction has 9928 states and 14891 transitions. [2022-11-23 14:12:06,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2022-11-23 14:12:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 9928 states and 14891 transitions. [2022-11-23 14:12:06,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-23 14:12:06,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:06,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:06,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:06,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 14:12:06,253 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:06,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2096815438, now seen corresponding path program 1 times [2022-11-23 14:12:06,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:06,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838815335] [2022-11-23 14:12:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:06,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:12:06,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:06,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838815335] [2022-11-23 14:12:06,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838815335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:06,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916706292] [2022-11-23 14:12:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:06,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:06,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:06,447 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:06,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:12:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:06,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:12:06,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:12:06,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:12:06,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916706292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:06,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:12:06,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-23 14:12:06,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399732489] [2022-11-23 14:12:06,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:06,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:12:06,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:06,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:12:06,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:12:06,807 INFO L87 Difference]: Start difference. First operand 9928 states and 14891 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2022-11-23 14:12:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:07,954 INFO L93 Difference]: Finished difference Result 29581 states and 45072 transitions. [2022-11-23 14:12:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:12:07,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 128 [2022-11-23 14:12:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:08,078 INFO L225 Difference]: With dead ends: 29581 [2022-11-23 14:12:08,078 INFO L226 Difference]: Without dead ends: 19658 [2022-11-23 14:12:08,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:12:08,122 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 217 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:08,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 451 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19658 states. [2022-11-23 14:12:09,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19658 to 19592. [2022-11-23 14:12:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19592 states, 16515 states have (on average 1.4921586436572813) internal successors, (24643), 16580 states have internal predecessors, (24643), 2308 states have call successors, (2308), 768 states have call predecessors, (2308), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2022-11-23 14:12:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19592 states to 19592 states and 29259 transitions. [2022-11-23 14:12:09,749 INFO L78 Accepts]: Start accepts. Automaton has 19592 states and 29259 transitions. Word has length 128 [2022-11-23 14:12:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:09,750 INFO L495 AbstractCegarLoop]: Abstraction has 19592 states and 29259 transitions. [2022-11-23 14:12:09,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2022-11-23 14:12:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 19592 states and 29259 transitions. [2022-11-23 14:12:09,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-23 14:12:09,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:09,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:09,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:09,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7e8fb8f-5905-4528-8f7f-39d7328df0a5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:12:09,996 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:09,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:09,996 INFO L85 PathProgramCache]: Analyzing trace with hash -891842160, now seen corresponding path program 1 times [2022-11-23 14:12:09,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:09,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792347264] [2022-11-23 14:12:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:09,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:12:10,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:10,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792347264] [2022-11-23 14:12:10,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792347264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:10,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:10,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:12:10,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484654350] [2022-11-23 14:12:10,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:10,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:12:10,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:10,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:12:10,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:12:10,701 INFO L87 Difference]: Start difference. First operand 19592 states and 29259 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:12:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:14,225 INFO L93 Difference]: Finished difference Result 63500 states and 95310 transitions. [2022-11-23 14:12:14,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:12:14,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 128 [2022-11-23 14:12:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:14,469 INFO L225 Difference]: With dead ends: 63500 [2022-11-23 14:12:14,469 INFO L226 Difference]: Without dead ends: 43914 [2022-11-23 14:12:14,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:12:14,531 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 869 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:14,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 652 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:12:14,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43914 states. [2022-11-23 14:12:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43914 to 38408. [2022-11-23 14:12:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38408 states, 32387 states have (on average 1.4861209744650632) internal successors, (48131), 32516 states have internal predecessors, (48131), 4484 states have call successors, (4484), 1536 states have call predecessors, (4484), 1536 states have return successors, (4484), 4356 states have call predecessors, (4484), 4484 states have call successors, (4484) [2022-11-23 14:12:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38408 states to 38408 states and 57099 transitions. [2022-11-23 14:12:18,490 INFO L78 Accepts]: Start accepts. Automaton has 38408 states and 57099 transitions. Word has length 128 [2022-11-23 14:12:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:18,491 INFO L495 AbstractCegarLoop]: Abstraction has 38408 states and 57099 transitions. [2022-11-23 14:12:18,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:12:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 38408 states and 57099 transitions. [2022-11-23 14:12:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-23 14:12:18,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:18,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:18,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:12:18,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:18,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash -617583796, now seen corresponding path program 1 times [2022-11-23 14:12:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:18,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691444163] [2022-11-23 14:12:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:12:19,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:19,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691444163] [2022-11-23 14:12:19,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691444163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:19,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:19,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:12:19,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586615402] [2022-11-23 14:12:19,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:19,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:12:19,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:19,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:12:19,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:12:19,294 INFO L87 Difference]: Start difference. First operand 38408 states and 57099 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:12:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:25,449 INFO L93 Difference]: Finished difference Result 134156 states and 199310 transitions. [2022-11-23 14:12:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:12:25,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2022-11-23 14:12:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:25,968 INFO L225 Difference]: With dead ends: 134156 [2022-11-23 14:12:25,968 INFO L226 Difference]: Without dead ends: 95754 [2022-11-23 14:12:26,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:12:26,089 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 987 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:26,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 789 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:12:26,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95754 states. [2022-11-23 14:12:31,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95754 to 75272. [2022-11-23 14:12:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75272 states, 63491 states have (on average 1.4798160369186184) internal successors, (93955), 63748 states have internal predecessors, (93955), 8708 states have call successors, (8708), 3072 states have call predecessors, (8708), 3072 states have return successors, (8708), 8452 states have call predecessors, (8708), 8708 states have call successors, (8708) [2022-11-23 14:12:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75272 states to 75272 states and 111371 transitions. [2022-11-23 14:12:32,427 INFO L78 Accepts]: Start accepts. Automaton has 75272 states and 111371 transitions. Word has length 129 [2022-11-23 14:12:32,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:32,429 INFO L495 AbstractCegarLoop]: Abstraction has 75272 states and 111371 transitions. [2022-11-23 14:12:32,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:12:32,430 INFO L276 IsEmpty]: Start isEmpty. Operand 75272 states and 111371 transitions. [2022-11-23 14:12:32,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 14:12:32,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:32,539 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:32,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:12:32,540 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:32,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1707933588, now seen corresponding path program 1 times [2022-11-23 14:12:32,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:32,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406181991] [2022-11-23 14:12:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:32,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:12:33,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:33,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406181991] [2022-11-23 14:12:33,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406181991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:33,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:33,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:12:33,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173051000] [2022-11-23 14:12:33,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:33,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:12:33,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:33,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:12:33,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:12:33,113 INFO L87 Difference]: Start difference. First operand 75272 states and 111371 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:12:41,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:41,166 INFO L93 Difference]: Finished difference Result 200204 states and 297485 transitions. [2022-11-23 14:12:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:12:41,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-11-23 14:12:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:42,059 INFO L225 Difference]: With dead ends: 200204 [2022-11-23 14:12:42,059 INFO L226 Difference]: Without dead ends: 124938 [2022-11-23 14:12:42,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:12:42,304 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 817 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:42,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 835 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:12:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124938 states.