./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.12.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 962623ba1d780e7ad35b9b6d7f5839750bc2f361556d46080824a3701cf71595 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:46:25,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:46:25,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:46:25,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:46:25,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:46:25,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:46:25,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:46:25,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:46:25,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:46:25,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:46:25,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:46:25,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:46:25,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:46:25,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:46:25,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:46:25,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:46:25,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:46:25,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:46:25,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:46:25,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:46:25,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:46:25,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:46:25,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:46:25,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:46:25,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:46:25,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:46:25,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:46:25,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:46:25,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:46:25,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:46:25,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:46:25,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:46:25,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:46:25,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:46:25,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:46:25,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:46:25,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:46:25,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:46:25,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:46:25,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:46:25,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:46:25,391 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:46:25,413 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:46:25,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:46:25,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:46:25,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:46:25,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:46:25,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:46:25,415 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:46:25,415 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:46:25,415 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:46:25,415 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:46:25,415 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:46:25,416 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:46:25,416 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:46:25,416 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:46:25,416 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:46:25,416 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:46:25,417 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:46:25,417 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:46:25,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:46:25,418 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:46:25,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:46:25,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:46:25,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:46:25,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:46:25,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:46:25,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:46:25,419 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:46:25,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:46:25,419 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:46:25,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:46:25,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:46:25,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:46:25,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:46:25,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:46:25,421 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:46:25,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:46:25,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:46:25,427 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:46:25,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:46:25,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:46:25,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:46:25,428 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_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 962623ba1d780e7ad35b9b6d7f5839750bc2f361556d46080824a3701cf71595 [2022-12-14 13:46:25,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:46:25,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:46:25,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:46:25,627 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:46:25,628 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:46:25,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/token_ring.12.cil-1.c [2022-12-14 13:46:28,213 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:46:28,398 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:46:28,399 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/sv-benchmarks/c/systemc/token_ring.12.cil-1.c [2022-12-14 13:46:28,411 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/data/4fdc6ba0a/af6b96aca8c049ddb06ac072b36a4b27/FLAG7a8f6d787 [2022-12-14 13:46:28,425 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/data/4fdc6ba0a/af6b96aca8c049ddb06ac072b36a4b27 [2022-12-14 13:46:28,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:46:28,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:46:28,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:46:28,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:46:28,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:46:28,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ec874e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28, skipping insertion in model container [2022-12-14 13:46:28,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:46:28,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:46:28,604 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_5adb0e1d-dfa3-41e3-8166-aa91c119e848/sv-benchmarks/c/systemc/token_ring.12.cil-1.c[671,684] [2022-12-14 13:46:28,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:46:28,705 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:46:28,713 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_5adb0e1d-dfa3-41e3-8166-aa91c119e848/sv-benchmarks/c/systemc/token_ring.12.cil-1.c[671,684] [2022-12-14 13:46:28,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:46:28,772 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:46:28,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28 WrapperNode [2022-12-14 13:46:28,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:46:28,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:46:28,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:46:28,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:46:28,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,813 INFO L138 Inliner]: procedures = 52, calls = 68, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 858 [2022-12-14 13:46:28,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:46:28,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:46:28,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:46:28,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:46:28,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,840 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:46:28,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:46:28,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:46:28,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:46:28,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28" (1/1) ... [2022-12-14 13:46:28,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:46:28,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:46:28,870 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:46:28,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:46:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:46:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 13:46:28,903 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 13:46:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 13:46:28,903 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 13:46:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 13:46:28,903 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 13:46:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 13:46:28,903 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 13:46:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 13:46:28,903 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 13:46:28,903 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 13:46:28,903 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 13:46:28,904 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 13:46:28,904 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 13:46:28,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:46:28,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:46:28,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:46:28,995 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:46:28,997 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:46:29,564 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:46:29,846 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:46:29,846 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-12-14 13:46:29,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:46:29 BoogieIcfgContainer [2022-12-14 13:46:29,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:46:29,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:46:29,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:46:29,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:46:29,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:46:28" (1/3) ... [2022-12-14 13:46:29,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598e6e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:46:29, skipping insertion in model container [2022-12-14 13:46:29,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:28" (2/3) ... [2022-12-14 13:46:29,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598e6e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:46:29, skipping insertion in model container [2022-12-14 13:46:29,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:46:29" (3/3) ... [2022-12-14 13:46:29,855 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.12.cil-1.c [2022-12-14 13:46:29,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:46:29,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:46:29,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:46:29,913 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;@7e38f62d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:46:29,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:46:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 194 states, 157 states have (on average 1.5668789808917198) internal successors, (246), 161 states have internal predecessors, (246), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-12-14 13:46:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 13:46:29,925 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:29,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:29,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1879870963, now seen corresponding path program 1 times [2022-12-14 13:46:29,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:29,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305316709] [2022-12-14 13:46:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:29,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:46:30,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:30,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305316709] [2022-12-14 13:46:30,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305316709] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:46:30,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:46:30,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:46:30,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332845820] [2022-12-14 13:46:30,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:46:30,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:46:30,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:30,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:46:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:46:30,246 INFO L87 Difference]: Start difference. First operand has 194 states, 157 states have (on average 1.5668789808917198) internal successors, (246), 161 states have internal predecessors, (246), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:46:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:30,646 INFO L93 Difference]: Finished difference Result 559 states and 888 transitions. [2022-12-14 13:46:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:46:30,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-12-14 13:46:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:30,667 INFO L225 Difference]: With dead ends: 559 [2022-12-14 13:46:30,667 INFO L226 Difference]: Without dead ends: 366 [2022-12-14 13:46:30,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:46:30,675 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 520 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:30,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 822 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:46:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-12-14 13:46:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2022-12-14 13:46:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 302 states have (on average 1.5298013245033113) internal successors, (462), 305 states have internal predecessors, (462), 50 states have call successors, (50), 13 states have call predecessors, (50), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2022-12-14 13:46:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 560 transitions. [2022-12-14 13:46:30,745 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 560 transitions. Word has length 67 [2022-12-14 13:46:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:30,746 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 560 transitions. [2022-12-14 13:46:30,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:46:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 560 transitions. [2022-12-14 13:46:30,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:46:30,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:30,753 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:30,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:46:30,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:30,754 INFO L85 PathProgramCache]: Analyzing trace with hash 775948601, now seen corresponding path program 1 times [2022-12-14 13:46:30,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:30,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332608536] [2022-12-14 13:46:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 13:46:31,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332608536] [2022-12-14 13:46:31,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332608536] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:46:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095222838] [2022-12-14 13:46:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:31,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:31,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:46:31,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:46:31,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:46:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:31,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:46:31,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:46:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 13:46:31,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:46:31,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095222838] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:46:31,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:46:31,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:46:31,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496348259] [2022-12-14 13:46:31,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:46:31,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:46:31,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:31,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:46:31,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:46:31,264 INFO L87 Difference]: Start difference. First operand 365 states and 560 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:31,409 INFO L93 Difference]: Finished difference Result 1078 states and 1683 transitions. [2022-12-14 13:46:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:46:31,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:46:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:31,416 INFO L225 Difference]: With dead ends: 1078 [2022-12-14 13:46:31,416 INFO L226 Difference]: Without dead ends: 718 [2022-12-14 13:46:31,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:46:31,419 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 267 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:31,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 535 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:46:31,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-12-14 13:46:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 712. [2022-12-14 13:46:31,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 595 states have (on average 1.5277310924369747) internal successors, (909), 599 states have internal predecessors, (909), 92 states have call successors, (92), 25 states have call predecessors, (92), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-12-14 13:46:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1091 transitions. [2022-12-14 13:46:31,467 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1091 transitions. Word has length 136 [2022-12-14 13:46:31,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:31,467 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 1091 transitions. [2022-12-14 13:46:31,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1091 transitions. [2022-12-14 13:46:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:46:31,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:31,473 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:31,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:46:31,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:31,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:31,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:31,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1713023463, now seen corresponding path program 1 times [2022-12-14 13:46:31,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:31,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017381690] [2022-12-14 13:46:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:31,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 13:46:31,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:31,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017381690] [2022-12-14 13:46:31,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017381690] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:46:31,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168050195] [2022-12-14 13:46:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:31,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:31,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:46:31,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:46:31,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:46:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:32,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:46:32,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:46:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 13:46:32,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:46:32,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168050195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:46:32,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:46:32,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:46:32,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711711318] [2022-12-14 13:46:32,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:46:32,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:46:32,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:32,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:46:32,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:46:32,182 INFO L87 Difference]: Start difference. First operand 712 states and 1091 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:32,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:32,358 INFO L93 Difference]: Finished difference Result 2113 states and 3294 transitions. [2022-12-14 13:46:32,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:46:32,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:46:32,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:32,367 INFO L225 Difference]: With dead ends: 2113 [2022-12-14 13:46:32,367 INFO L226 Difference]: Without dead ends: 1406 [2022-12-14 13:46:32,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:46:32,372 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 270 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:32,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:46:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2022-12-14 13:46:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1398. [2022-12-14 13:46:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1175 states have (on average 1.524255319148936) internal successors, (1791), 1181 states have internal predecessors, (1791), 174 states have call successors, (174), 49 states have call predecessors, (174), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2022-12-14 13:46:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2137 transitions. [2022-12-14 13:46:32,467 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2137 transitions. Word has length 136 [2022-12-14 13:46:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:32,467 INFO L495 AbstractCegarLoop]: Abstraction has 1398 states and 2137 transitions. [2022-12-14 13:46:32,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2137 transitions. [2022-12-14 13:46:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:46:32,474 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:32,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:32,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:46:32,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 13:46:32,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1930583353, now seen corresponding path program 1 times [2022-12-14 13:46:32,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:32,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519194797] [2022-12-14 13:46:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:32,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 13:46:32,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:32,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519194797] [2022-12-14 13:46:32,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519194797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:46:32,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347690430] [2022-12-14 13:46:32,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:32,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:32,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:46:32,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:46:32,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:46:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:32,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:46:32,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:46:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:46:33,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:46:33,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347690430] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:46:33,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:46:33,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 13:46:33,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389763485] [2022-12-14 13:46:33,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:46:33,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:46:33,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:33,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:46:33,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:46:33,028 INFO L87 Difference]: Start difference. First operand 1398 states and 2137 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:33,224 INFO L93 Difference]: Finished difference Result 4159 states and 6466 transitions. [2022-12-14 13:46:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:46:33,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:46:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:33,238 INFO L225 Difference]: With dead ends: 4159 [2022-12-14 13:46:33,239 INFO L226 Difference]: Without dead ends: 2766 [2022-12-14 13:46:33,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:46:33,245 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 249 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:33,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:46:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-12-14 13:46:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2754. [2022-12-14 13:46:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2323 states have (on average 1.5200172191132157) internal successors, (3531), 2333 states have internal predecessors, (3531), 334 states have call successors, (334), 97 states have call predecessors, (334), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2022-12-14 13:46:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 4197 transitions. [2022-12-14 13:46:33,405 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 4197 transitions. Word has length 136 [2022-12-14 13:46:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:33,405 INFO L495 AbstractCegarLoop]: Abstraction has 2754 states and 4197 transitions. [2022-12-14 13:46:33,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:33,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 4197 transitions. [2022-12-14 13:46:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:46:33,413 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:33,413 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:33,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:46:33,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:33,614 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1959469593, now seen corresponding path program 1 times [2022-12-14 13:46:33,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:33,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602715089] [2022-12-14 13:46:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:33,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 13:46:33,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:33,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602715089] [2022-12-14 13:46:33,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602715089] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:46:33,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575325642] [2022-12-14 13:46:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:33,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:33,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:46:33,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:46:33,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:46:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:33,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:46:33,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:46:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:46:33,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:46:33,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575325642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:46:33,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:46:33,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 13:46:33,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956746924] [2022-12-14 13:46:33,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:46:33,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:46:33,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:33,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:46:33,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:46:33,921 INFO L87 Difference]: Start difference. First operand 2754 states and 4197 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:34,144 INFO L93 Difference]: Finished difference Result 8203 states and 12710 transitions. [2022-12-14 13:46:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:46:34,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:46:34,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:34,164 INFO L225 Difference]: With dead ends: 8203 [2022-12-14 13:46:34,164 INFO L226 Difference]: Without dead ends: 5454 [2022-12-14 13:46:34,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:46:34,173 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 261 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:34,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:46:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5454 states. [2022-12-14 13:46:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5454 to 5434. [2022-12-14 13:46:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5434 states, 4595 states have (on average 1.5153427638737758) internal successors, (6963), 4613 states have internal predecessors, (6963), 646 states have call successors, (646), 193 states have call predecessors, (646), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2022-12-14 13:46:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5434 states to 5434 states and 8253 transitions. [2022-12-14 13:46:34,391 INFO L78 Accepts]: Start accepts. Automaton has 5434 states and 8253 transitions. Word has length 136 [2022-12-14 13:46:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:34,391 INFO L495 AbstractCegarLoop]: Abstraction has 5434 states and 8253 transitions. [2022-12-14 13:46:34,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5434 states and 8253 transitions. [2022-12-14 13:46:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:46:34,407 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:34,407 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:34,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:46:34,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:34,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:34,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:34,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1507617031, now seen corresponding path program 1 times [2022-12-14 13:46:34,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:34,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544087559] [2022-12-14 13:46:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:34,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:46:34,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:34,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544087559] [2022-12-14 13:46:34,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544087559] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:46:34,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490212331] [2022-12-14 13:46:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:34,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:34,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:46:34,689 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:46:34,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:46:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:34,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:46:34,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:46:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:46:34,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:46:34,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490212331] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:46:34,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:46:34,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 13:46:34,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84247089] [2022-12-14 13:46:34,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:46:34,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:46:34,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:34,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:46:34,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:46:34,923 INFO L87 Difference]: Start difference. First operand 5434 states and 8253 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:35,282 INFO L93 Difference]: Finished difference Result 16195 states and 24998 transitions. [2022-12-14 13:46:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:46:35,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:46:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:35,318 INFO L225 Difference]: With dead ends: 16195 [2022-12-14 13:46:35,319 INFO L226 Difference]: Without dead ends: 10766 [2022-12-14 13:46:35,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:46:35,332 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 240 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:35,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:46:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10766 states. [2022-12-14 13:46:35,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10766 to 10730. [2022-12-14 13:46:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10730 states, 9091 states have (on average 1.5103948960510394) internal successors, (13731), 9125 states have internal predecessors, (13731), 1254 states have call successors, (1254), 385 states have call predecessors, (1254), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2022-12-14 13:46:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10730 states to 10730 states and 16237 transitions. [2022-12-14 13:46:35,721 INFO L78 Accepts]: Start accepts. Automaton has 10730 states and 16237 transitions. Word has length 136 [2022-12-14 13:46:35,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:35,722 INFO L495 AbstractCegarLoop]: Abstraction has 10730 states and 16237 transitions. [2022-12-14 13:46:35,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 10730 states and 16237 transitions. [2022-12-14 13:46:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:46:35,741 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:35,742 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:35,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:46:35,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:35,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:35,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1173345817, now seen corresponding path program 1 times [2022-12-14 13:46:35,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:35,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340534025] [2022-12-14 13:46:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:35,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:46:36,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:36,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340534025] [2022-12-14 13:46:36,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340534025] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:46:36,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659854246] [2022-12-14 13:46:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:36,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:36,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:46:36,040 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:46:36,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:46:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:36,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:46:36,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:46:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:46:36,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:46:36,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659854246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:46:36,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:46:36,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 13:46:36,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810846939] [2022-12-14 13:46:36,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:46:36,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:46:36,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:36,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:46:36,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:46:36,228 INFO L87 Difference]: Start difference. First operand 10730 states and 16237 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:36,842 INFO L93 Difference]: Finished difference Result 31987 states and 49174 transitions. [2022-12-14 13:46:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:46:36,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:46:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:36,909 INFO L225 Difference]: With dead ends: 31987 [2022-12-14 13:46:36,909 INFO L226 Difference]: Without dead ends: 21262 [2022-12-14 13:46:36,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:46:36,959 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 243 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:36,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:46:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21262 states. [2022-12-14 13:46:37,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21262 to 21194. [2022-12-14 13:46:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21194 states, 17987 states have (on average 1.5052537944070719) internal successors, (27075), 18053 states have internal predecessors, (27075), 2438 states have call successors, (2438), 769 states have call predecessors, (2438), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-12-14 13:46:37,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21194 states to 21194 states and 31949 transitions. [2022-12-14 13:46:37,569 INFO L78 Accepts]: Start accepts. Automaton has 21194 states and 31949 transitions. Word has length 136 [2022-12-14 13:46:37,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:37,570 INFO L495 AbstractCegarLoop]: Abstraction has 21194 states and 31949 transitions. [2022-12-14 13:46:37,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:37,570 INFO L276 IsEmpty]: Start isEmpty. Operand 21194 states and 31949 transitions. [2022-12-14 13:46:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:46:37,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:37,594 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:37,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 13:46:37,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:37,795 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:37,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:37,795 INFO L85 PathProgramCache]: Analyzing trace with hash 525714169, now seen corresponding path program 1 times [2022-12-14 13:46:37,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:37,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273594776] [2022-12-14 13:46:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:37,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:46:37,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:37,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273594776] [2022-12-14 13:46:37,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273594776] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:46:37,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253139247] [2022-12-14 13:46:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:37,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:37,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:46:37,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:46:37,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:46:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:38,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:46:38,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:46:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:46:38,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:46:38,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253139247] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:46:38,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:46:38,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 13:46:38,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709360045] [2022-12-14 13:46:38,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:46:38,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:46:38,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:46:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:46:38,151 INFO L87 Difference]: Start difference. First operand 21194 states and 31949 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:39,240 INFO L93 Difference]: Finished difference Result 63187 states and 96726 transitions. [2022-12-14 13:46:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:46:39,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:46:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:39,372 INFO L225 Difference]: With dead ends: 63187 [2022-12-14 13:46:39,372 INFO L226 Difference]: Without dead ends: 41998 [2022-12-14 13:46:39,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:46:39,425 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 255 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:39,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:46:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41998 states. [2022-12-14 13:46:40,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41998 to 41866. [2022-12-14 13:46:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41866 states, 35587 states have (on average 1.4999578497766037) internal successors, (53379), 35717 states have internal predecessors, (53379), 4742 states have call successors, (4742), 1537 states have call predecessors, (4742), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2022-12-14 13:46:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41866 states to 41866 states and 62861 transitions. [2022-12-14 13:46:40,911 INFO L78 Accepts]: Start accepts. Automaton has 41866 states and 62861 transitions. Word has length 136 [2022-12-14 13:46:40,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:40,911 INFO L495 AbstractCegarLoop]: Abstraction has 41866 states and 62861 transitions. [2022-12-14 13:46:40,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:46:40,911 INFO L276 IsEmpty]: Start isEmpty. Operand 41866 states and 62861 transitions. [2022-12-14 13:46:40,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:46:40,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:40,947 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:40,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:46:41,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 13:46:41,147 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2048958503, now seen corresponding path program 1 times [2022-12-14 13:46:41,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:41,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135852885] [2022-12-14 13:46:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:41,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 13:46:41,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:41,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135852885] [2022-12-14 13:46:41,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135852885] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:46:41,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:46:41,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:46:41,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784145903] [2022-12-14 13:46:41,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:46:41,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:46:41,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:41,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:46:41,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:46:41,497 INFO L87 Difference]: Start difference. First operand 41866 states and 62861 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 13:46:43,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:43,773 INFO L93 Difference]: Finished difference Result 114386 states and 171859 transitions. [2022-12-14 13:46:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:46:43,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 136 [2022-12-14 13:46:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:44,028 INFO L225 Difference]: With dead ends: 114386 [2022-12-14 13:46:44,029 INFO L226 Difference]: Without dead ends: 72526 [2022-12-14 13:46:44,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:46:44,110 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 924 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:44,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 1047 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:46:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72526 states. [2022-12-14 13:46:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72526 to 62282. [2022-12-14 13:46:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62282 states, 52931 states have (on average 1.495739736638265) internal successors, (79171), 53125 states have internal predecessors, (79171), 7046 states have call successors, (7046), 2305 states have call predecessors, (7046), 2304 states have return successors, (7044), 6852 states have call predecessors, (7044), 7044 states have call successors, (7044) [2022-12-14 13:46:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62282 states to 62282 states and 93261 transitions. [2022-12-14 13:46:46,698 INFO L78 Accepts]: Start accepts. Automaton has 62282 states and 93261 transitions. Word has length 136 [2022-12-14 13:46:46,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:46,698 INFO L495 AbstractCegarLoop]: Abstraction has 62282 states and 93261 transitions. [2022-12-14 13:46:46,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 13:46:46,699 INFO L276 IsEmpty]: Start isEmpty. Operand 62282 states and 93261 transitions. [2022-12-14 13:46:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 13:46:46,747 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:46,747 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:46,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:46:46,747 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:46,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1203270291, now seen corresponding path program 1 times [2022-12-14 13:46:46,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:46,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626892889] [2022-12-14 13:46:46,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:46,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 13:46:47,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:47,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626892889] [2022-12-14 13:46:47,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626892889] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:46:47,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:46:47,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:46:47,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671093091] [2022-12-14 13:46:47,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:46:47,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:46:47,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:47,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:46:47,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:46:47,050 INFO L87 Difference]: Start difference. First operand 62282 states and 93261 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 13:46:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:53,181 INFO L93 Difference]: Finished difference Result 218066 states and 325972 transitions. [2022-12-14 13:46:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:46:53,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2022-12-14 13:46:53,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:53,649 INFO L225 Difference]: With dead ends: 218066 [2022-12-14 13:46:53,649 INFO L226 Difference]: Without dead ends: 155790 [2022-12-14 13:46:53,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:46:53,788 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 1148 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:53,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 742 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:46:53,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155790 states. [2022-12-14 13:46:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155790 to 122250. [2022-12-14 13:46:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122250 states, 103939 states have (on average 1.4901336360750055) internal successors, (154883), 104325 states have internal predecessors, (154883), 13702 states have call successors, (13702), 4609 states have call predecessors, (13702), 4608 states have return successors, (13700), 13316 states have call predecessors, (13700), 13700 states have call successors, (13700) [2022-12-14 13:46:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122250 states to 122250 states and 182285 transitions. [2022-12-14 13:46:58,590 INFO L78 Accepts]: Start accepts. Automaton has 122250 states and 182285 transitions. Word has length 137 [2022-12-14 13:46:58,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:58,590 INFO L495 AbstractCegarLoop]: Abstraction has 122250 states and 182285 transitions. [2022-12-14 13:46:58,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 13:46:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand 122250 states and 182285 transitions. [2022-12-14 13:46:58,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-12-14 13:46:58,697 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:58,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 13:46:58,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:46:58,697 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1416551369, now seen corresponding path program 1 times [2022-12-14 13:46:58,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:58,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261285552] [2022-12-14 13:46:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:58,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 13:46:58,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:58,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261285552] [2022-12-14 13:46:58,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261285552] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:46:58,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781033986] [2022-12-14 13:46:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:58,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:58,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:46:58,907 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:46:58,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:46:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:59,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:46:59,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:46:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 13:46:59,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:46:59,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781033986] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:46:59,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:46:59,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:46:59,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498577756] [2022-12-14 13:46:59,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:46:59,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:46:59,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:59,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:46:59,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:46:59,100 INFO L87 Difference]: Start difference. First operand 122250 states and 182285 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:47:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:47:04,736 INFO L93 Difference]: Finished difference Result 216654 states and 328912 transitions. [2022-12-14 13:47:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:47:04,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 160 [2022-12-14 13:47:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:47:05,159 INFO L225 Difference]: With dead ends: 216654 [2022-12-14 13:47:05,160 INFO L226 Difference]: Without dead ends: 154186 [2022-12-14 13:47:05,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:47:05,269 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 125 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:47:05,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 629 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:47:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154186 states. [2022-12-14 13:47:10,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154186 to 145418. [2022-12-14 13:47:10,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145418 states, 126339 states have (on average 1.53088911579164) internal successors, (193411), 126725 states have internal predecessors, (193411), 14086 states have call successors, (14086), 4993 states have call predecessors, (14086), 4992 states have return successors, (14084), 13700 states have call predecessors, (14084), 14084 states have call successors, (14084) [2022-12-14 13:47:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145418 states to 145418 states and 221581 transitions. [2022-12-14 13:47:10,796 INFO L78 Accepts]: Start accepts. Automaton has 145418 states and 221581 transitions. Word has length 160 [2022-12-14 13:47:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:47:10,796 INFO L495 AbstractCegarLoop]: Abstraction has 145418 states and 221581 transitions. [2022-12-14 13:47:10,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:47:10,796 INFO L276 IsEmpty]: Start isEmpty. Operand 145418 states and 221581 transitions. [2022-12-14 13:47:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-12-14 13:47:11,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:47:11,008 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:47:11,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:47:11,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 13:47:11,210 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:47:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:47:11,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1816633715, now seen corresponding path program 1 times [2022-12-14 13:47:11,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:47:11,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736557419] [2022-12-14 13:47:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:47:11,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:47:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:47:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 13:47:11,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:47:11,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736557419] [2022-12-14 13:47:11,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736557419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:47:11,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890464513] [2022-12-14 13:47:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:47:11,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:47:11,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:47:11,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:47:11,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:47:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:47:11,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:47:11,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:47:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 13:47:11,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:47:11,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890464513] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:47:11,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:47:11,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 13:47:11,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672222702] [2022-12-14 13:47:11,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:47:11,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:47:11,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:47:11,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:47:11,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:47:11,742 INFO L87 Difference]: Start difference. First operand 145418 states and 221581 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:47:21,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:47:21,261 INFO L93 Difference]: Finished difference Result 433939 states and 669206 transitions. [2022-12-14 13:47:21,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:47:21,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 210 [2022-12-14 13:47:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:47:22,088 INFO L225 Difference]: With dead ends: 433939 [2022-12-14 13:47:22,088 INFO L226 Difference]: Without dead ends: 288526 [2022-12-14 13:47:22,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:47:22,360 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 194 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:47:22,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:47:22,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288526 states. [2022-12-14 13:47:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288526 to 287370. [2022-12-14 13:47:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287370 states, 249987 states have (on average 1.525851344269902) internal successors, (381443), 250757 states have internal predecessors, (381443), 27398 states have call successors, (27398), 9985 states have call predecessors, (27398), 9984 states have return successors, (27396), 26628 states have call predecessors, (27396), 27396 states have call successors, (27396) [2022-12-14 13:47:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287370 states to 287370 states and 436237 transitions. [2022-12-14 13:47:33,980 INFO L78 Accepts]: Start accepts. Automaton has 287370 states and 436237 transitions. Word has length 210 [2022-12-14 13:47:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:47:33,981 INFO L495 AbstractCegarLoop]: Abstraction has 287370 states and 436237 transitions. [2022-12-14 13:47:33,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:47:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 287370 states and 436237 transitions. [2022-12-14 13:47:34,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-12-14 13:47:34,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:47:34,580 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:47:34,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:47:34,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 13:47:34,782 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:47:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:47:34,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2099521316, now seen corresponding path program 1 times [2022-12-14 13:47:34,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:47:34,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529120448] [2022-12-14 13:47:34,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:47:34,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:47:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:47:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 13:47:35,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:47:35,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529120448] [2022-12-14 13:47:35,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529120448] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:47:35,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140850623] [2022-12-14 13:47:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:47:35,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:47:35,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:47:35,138 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:47:35,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:47:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:47:35,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:47:35,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:47:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 13:47:35,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:47:35,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140850623] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:47:35,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:47:35,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 13:47:35,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733954906] [2022-12-14 13:47:35,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:47:35,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:47:35,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:47:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:47:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:47:35,477 INFO L87 Difference]: Start difference. First operand 287370 states and 436237 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:47:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:47:55,392 INFO L93 Difference]: Finished difference Result 857491 states and 1316886 transitions. [2022-12-14 13:47:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:47:55,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 210 [2022-12-14 13:47:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:47:57,235 INFO L225 Difference]: With dead ends: 857491 [2022-12-14 13:47:57,235 INFO L226 Difference]: Without dead ends: 570126 [2022-12-14 13:47:57,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:47:57,750 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 194 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:47:57,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:47:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570126 states. [2022-12-14 13:48:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570126 to 567818. [2022-12-14 13:48:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567818 states, 494595 states have (on average 1.5207007753818782) internal successors, (752131), 496133 states have internal predecessors, (752131), 53254 states have call successors, (53254), 19969 states have call predecessors, (53254), 19968 states have return successors, (53252), 51716 states have call predecessors, (53252), 53252 states have call successors, (53252) [2022-12-14 13:48:21,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567818 states to 567818 states and 858637 transitions. [2022-12-14 13:48:21,863 INFO L78 Accepts]: Start accepts. Automaton has 567818 states and 858637 transitions. Word has length 210 [2022-12-14 13:48:21,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:21,864 INFO L495 AbstractCegarLoop]: Abstraction has 567818 states and 858637 transitions. [2022-12-14 13:48:21,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:48:21,864 INFO L276 IsEmpty]: Start isEmpty. Operand 567818 states and 858637 transitions. [2022-12-14 13:48:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-12-14 13:48:23,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:23,053 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:23,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 13:48:23,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:23,255 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash 504891587, now seen corresponding path program 1 times [2022-12-14 13:48:23,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:23,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135190723] [2022-12-14 13:48:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:23,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 13:48:23,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:23,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135190723] [2022-12-14 13:48:23,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135190723] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:23,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954402030] [2022-12-14 13:48:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:23,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:23,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:23,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:23,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:48:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:23,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:48:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 13:48:23,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:48:23,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954402030] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:23,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:48:23,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 13:48:23,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426414557] [2022-12-14 13:48:23,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:23,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:48:23,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:23,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:48:23,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:48:23,841 INFO L87 Difference]: Start difference. First operand 567818 states and 858637 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:49:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:07,206 INFO L93 Difference]: Finished difference Result 1694227 states and 2590742 transitions. [2022-12-14 13:49:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:49:07,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 210 [2022-12-14 13:49:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:11,146 INFO L225 Difference]: With dead ends: 1694227 [2022-12-14 13:49:11,146 INFO L226 Difference]: Without dead ends: 1126414 [2022-12-14 13:49:12,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:49:12,795 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 194 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:12,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 504 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:49:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126414 states. [2022-12-14 13:49:57,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126414 to 1121802. [2022-12-14 13:49:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121802 states, 978435 states have (on average 1.5154353636163873) internal successors, (1482755), 981509 states have internal predecessors, (1482755), 103430 states have call successors, (103430), 39937 states have call predecessors, (103430), 39936 states have return successors, (103428), 100356 states have call predecessors, (103428), 103428 states have call successors, (103428) [2022-12-14 13:50:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121802 states to 1121802 states and 1689613 transitions. [2022-12-14 13:50:04,181 INFO L78 Accepts]: Start accepts. Automaton has 1121802 states and 1689613 transitions. Word has length 210 [2022-12-14 13:50:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:50:04,182 INFO L495 AbstractCegarLoop]: Abstraction has 1121802 states and 1689613 transitions. [2022-12-14 13:50:04,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:50:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1121802 states and 1689613 transitions. [2022-12-14 13:50:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-12-14 13:50:06,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:50:06,643 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:50:06,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:50:06,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:50:06,845 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:50:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:50:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1148342881, now seen corresponding path program 1 times [2022-12-14 13:50:06,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:50:06,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551785037] [2022-12-14 13:50:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:06,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:50:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 13:50:07,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:50:07,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551785037] [2022-12-14 13:50:07,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551785037] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:50:07,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509801748] [2022-12-14 13:50:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:07,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:50:07,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:50:07,080 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:50:07,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5adb0e1d-dfa3-41e3-8166-aa91c119e848/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:50:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:07,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:50:07,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:50:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 13:50:07,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:50:07,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509801748] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:50:07,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:50:07,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 13:50:07,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332181050] [2022-12-14 13:50:07,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:50:07,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:50:07,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:50:07,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:50:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:50:07,349 INFO L87 Difference]: Start difference. First operand 1121802 states and 1689613 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)