./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7 --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 8d970a6b46f522cdb24394c622109e56254d5436a464b2c277d963fe4612a422 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:17:32,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:17:32,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:17:32,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:17:32,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:17:32,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:17:32,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:17:32,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:17:32,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:17:32,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:17:32,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:17:32,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:17:32,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:17:32,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:17:32,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:17:32,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:17:32,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:17:32,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:17:32,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:17:32,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:17:32,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:17:32,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:17:32,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:17:32,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:17:32,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:17:32,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:17:32,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:17:32,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:17:32,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:17:32,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:17:32,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:17:32,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:17:32,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:17:32,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:17:32,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:17:32,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:17:32,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:17:32,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:17:32,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:17:32,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:17:32,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:17:32,469 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:17:32,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:17:32,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:17:32,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:17:32,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:17:32,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:17:32,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:17:32,503 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:17:32,504 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:17:32,504 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:17:32,504 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:17:32,505 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:17:32,505 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:17:32,506 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:17:32,506 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:17:32,507 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:17:32,507 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:17:32,507 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:17:32,507 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:17:32,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:17:32,509 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:17:32,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:17:32,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:17:32,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:17:32,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:17:32,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:17:32,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:17:32,510 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:17:32,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:17:32,511 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:17:32,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:17:32,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:17:32,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:17:32,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:17:32,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:17:32,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:17:32,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:17:32,513 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:17:32,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:17:32,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:17:32,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:17:32,514 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:17:32,514 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d970a6b46f522cdb24394c622109e56254d5436a464b2c277d963fe4612a422 [2021-11-25 18:17:32,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:17:32,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:17:32,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:17:32,841 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:17:32,842 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:17:32,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-25 18:17:32,934 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/data/91f6ab19d/aba5ab88f3bf4ed49e435a4d49b01bea/FLAG2ee8268ab [2021-11-25 18:17:33,528 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:17:33,529 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-25 18:17:33,547 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/data/91f6ab19d/aba5ab88f3bf4ed49e435a4d49b01bea/FLAG2ee8268ab [2021-11-25 18:17:33,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/data/91f6ab19d/aba5ab88f3bf4ed49e435a4d49b01bea [2021-11-25 18:17:33,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:17:33,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:17:33,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:17:33,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:17:33,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:17:33,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:17:33" (1/1) ... [2021-11-25 18:17:33,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6435c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:33, skipping insertion in model container [2021-11-25 18:17:33,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:17:33" (1/1) ... [2021-11-25 18:17:33,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:17:33,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:17:34,218 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6356,6369] [2021-11-25 18:17:34,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:17:34,286 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:17:34,334 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6356,6369] [2021-11-25 18:17:34,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:17:34,417 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:17:34,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:34 WrapperNode [2021-11-25 18:17:34,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:17:34,419 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:17:34,419 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:17:34,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:17:34,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:34" (1/1) ... [2021-11-25 18:17:34,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:34" (1/1) ... [2021-11-25 18:17:34,519 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 519 [2021-11-25 18:17:34,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:17:34,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:17:34,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:17:34,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:17:34,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:34" (1/1) ... [2021-11-25 18:17:34,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:34" (1/1) ... [2021-11-25 18:17:34,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:34" (1/1) ... [2021-11-25 18:17:34,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:34" (1/1) ... [2021-11-25 18:17:34,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:34" (1/1) ... [2021-11-25 18:17:34,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:34" (1/1) ... [2021-11-25 18:17:34,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:34" (1/1) ... [2021-11-25 18:17:34,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:17:34,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:17:34,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:17:34,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:17:34,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:34" (1/1) ... [2021-11-25 18:17:34,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:17:34,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:17:34,624 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:17:34,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:17:34,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:17:34,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:17:34,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:17:34,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:17:34,793 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:17:34,795 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:17:35,411 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:17:35,615 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:17:35,616 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:17:35,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:17:35 BoogieIcfgContainer [2021-11-25 18:17:35,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:17:35,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:17:35,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:17:35,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:17:35,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:17:33" (1/3) ... [2021-11-25 18:17:35,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb1a162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:17:35, skipping insertion in model container [2021-11-25 18:17:35,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:34" (2/3) ... [2021-11-25 18:17:35,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb1a162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:17:35, skipping insertion in model container [2021-11-25 18:17:35,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:17:35" (3/3) ... [2021-11-25 18:17:35,631 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-25 18:17:35,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:17:35,641 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:17:35,700 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:17:35,708 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:17:35,708 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:17:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 1.6796116504854368) internal successors, (173), 104 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 18:17:35,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:35,737 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:17:35,738 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:35,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:35,744 INFO L85 PathProgramCache]: Analyzing trace with hash -111132534, now seen corresponding path program 1 times [2021-11-25 18:17:35,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:35,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763650381] [2021-11-25 18:17:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:35,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:17:36,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763650381] [2021-11-25 18:17:36,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763650381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:17:36,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:17:36,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:17:36,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122070603] [2021-11-25 18:17:36,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:17:36,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:17:36,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:36,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:17:36,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:17:36,234 INFO L87 Difference]: Start difference. First operand has 105 states, 103 states have (on average 1.6796116504854368) internal successors, (173), 104 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:36,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:36,392 INFO L93 Difference]: Finished difference Result 236 states and 368 transitions. [2021-11-25 18:17:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:17:36,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-25 18:17:36,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:36,407 INFO L225 Difference]: With dead ends: 236 [2021-11-25 18:17:36,407 INFO L226 Difference]: Without dead ends: 161 [2021-11-25 18:17:36,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:17:36,415 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 129 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:36,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 332 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:17:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-25 18:17:36,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-11-25 18:17:36,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.4113924050632911) internal successors, (223), 158 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 223 transitions. [2021-11-25 18:17:36,475 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 223 transitions. Word has length 47 [2021-11-25 18:17:36,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:36,476 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 223 transitions. [2021-11-25 18:17:36,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 223 transitions. [2021-11-25 18:17:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:17:36,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:36,486 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:17:36,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:17:36,487 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1849219760, now seen corresponding path program 1 times [2021-11-25 18:17:36,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:36,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480899123] [2021-11-25 18:17:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:36,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:17:36,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:36,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480899123] [2021-11-25 18:17:36,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480899123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:17:36,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:17:36,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:17:36,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25069264] [2021-11-25 18:17:36,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:17:36,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:17:36,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:36,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:17:36,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:17:36,662 INFO L87 Difference]: Start difference. First operand 159 states and 223 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:36,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:36,766 INFO L93 Difference]: Finished difference Result 387 states and 567 transitions. [2021-11-25 18:17:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:17:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-25 18:17:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:36,770 INFO L225 Difference]: With dead ends: 387 [2021-11-25 18:17:36,770 INFO L226 Difference]: Without dead ends: 262 [2021-11-25 18:17:36,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:17:36,773 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 96 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:36,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 279 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:17:36,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-25 18:17:36,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2021-11-25 18:17:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.4478764478764479) internal successors, (375), 259 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 375 transitions. [2021-11-25 18:17:36,812 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 375 transitions. Word has length 50 [2021-11-25 18:17:36,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:36,813 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 375 transitions. [2021-11-25 18:17:36,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 375 transitions. [2021-11-25 18:17:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 18:17:36,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:36,816 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:17:36,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:17:36,816 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:36,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2139893357, now seen corresponding path program 1 times [2021-11-25 18:17:36,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:36,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824811671] [2021-11-25 18:17:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:36,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:17:36,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:36,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824811671] [2021-11-25 18:17:36,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824811671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:17:36,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:17:36,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:17:36,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308938700] [2021-11-25 18:17:36,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:17:36,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:17:36,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:36,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:17:36,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:17:36,974 INFO L87 Difference]: Start difference. First operand 260 states and 375 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:37,091 INFO L93 Difference]: Finished difference Result 668 states and 989 transitions. [2021-11-25 18:17:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:17:37,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-25 18:17:37,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:37,100 INFO L225 Difference]: With dead ends: 668 [2021-11-25 18:17:37,100 INFO L226 Difference]: Without dead ends: 442 [2021-11-25 18:17:37,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:17:37,115 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 91 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:37,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 264 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:17:37,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-11-25 18:17:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2021-11-25 18:17:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.4646924829157175) internal successors, (643), 439 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:37,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 643 transitions. [2021-11-25 18:17:37,202 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 643 transitions. Word has length 53 [2021-11-25 18:17:37,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:37,203 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 643 transitions. [2021-11-25 18:17:37,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:37,203 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 643 transitions. [2021-11-25 18:17:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 18:17:37,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:37,214 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:17:37,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:17:37,215 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:37,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1373305298, now seen corresponding path program 1 times [2021-11-25 18:17:37,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:37,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127444516] [2021-11-25 18:17:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:37,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:17:37,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:37,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127444516] [2021-11-25 18:17:37,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127444516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:17:37,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:17:37,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:17:37,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024498288] [2021-11-25 18:17:37,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:17:37,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:17:37,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:37,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:17:37,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:17:37,355 INFO L87 Difference]: Start difference. First operand 440 states and 643 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:37,468 INFO L93 Difference]: Finished difference Result 1164 states and 1725 transitions. [2021-11-25 18:17:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:17:37,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-25 18:17:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:37,481 INFO L225 Difference]: With dead ends: 1164 [2021-11-25 18:17:37,482 INFO L226 Difference]: Without dead ends: 758 [2021-11-25 18:17:37,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:17:37,495 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 86 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:37,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 249 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:17:37,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-11-25 18:17:37,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 756. [2021-11-25 18:17:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 1.466225165562914) internal successors, (1107), 755 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1107 transitions. [2021-11-25 18:17:37,564 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1107 transitions. Word has length 56 [2021-11-25 18:17:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:37,564 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1107 transitions. [2021-11-25 18:17:37,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1107 transitions. [2021-11-25 18:17:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 18:17:37,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:37,569 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:17:37,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:17:37,570 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:37,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1018529529, now seen corresponding path program 1 times [2021-11-25 18:17:37,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:37,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555392271] [2021-11-25 18:17:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:37,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:17:37,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555392271] [2021-11-25 18:17:37,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555392271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:17:37,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:17:37,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:17:37,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110966841] [2021-11-25 18:17:37,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:17:37,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:17:37,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:17:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:17:37,716 INFO L87 Difference]: Start difference. First operand 756 states and 1107 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:37,871 INFO L93 Difference]: Finished difference Result 2024 states and 2981 transitions. [2021-11-25 18:17:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:17:37,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-25 18:17:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:37,881 INFO L225 Difference]: With dead ends: 2024 [2021-11-25 18:17:37,882 INFO L226 Difference]: Without dead ends: 1302 [2021-11-25 18:17:37,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:17:37,884 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 81 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:37,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 234 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:17:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-11-25 18:17:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1300. [2021-11-25 18:17:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 1.4557351809083912) internal successors, (1891), 1299 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1891 transitions. [2021-11-25 18:17:37,990 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1891 transitions. Word has length 59 [2021-11-25 18:17:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:37,991 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 1891 transitions. [2021-11-25 18:17:37,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1891 transitions. [2021-11-25 18:17:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 18:17:38,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:38,002 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:17:38,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:17:38,002 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:38,004 INFO L85 PathProgramCache]: Analyzing trace with hash -108942455, now seen corresponding path program 1 times [2021-11-25 18:17:38,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:38,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185413194] [2021-11-25 18:17:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:38,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:17:38,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:38,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185413194] [2021-11-25 18:17:38,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185413194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:17:38,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:17:38,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:17:38,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156335637] [2021-11-25 18:17:38,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:17:38,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:17:38,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:38,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:17:38,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:17:38,236 INFO L87 Difference]: Start difference. First operand 1300 states and 1891 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:39,001 INFO L93 Difference]: Finished difference Result 6590 states and 9576 transitions. [2021-11-25 18:17:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:17:39,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-25 18:17:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:39,040 INFO L225 Difference]: With dead ends: 6590 [2021-11-25 18:17:39,040 INFO L226 Difference]: Without dead ends: 5324 [2021-11-25 18:17:39,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:17:39,046 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 436 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:39,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 714 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:17:39,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2021-11-25 18:17:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 5316. [2021-11-25 18:17:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 5315 states have (on average 1.4485418626528692) internal successors, (7699), 5315 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 7699 transitions. [2021-11-25 18:17:39,645 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 7699 transitions. Word has length 62 [2021-11-25 18:17:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:39,645 INFO L470 AbstractCegarLoop]: Abstraction has 5316 states and 7699 transitions. [2021-11-25 18:17:39,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:39,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 7699 transitions. [2021-11-25 18:17:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 18:17:39,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:39,647 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:17:39,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:17:39,648 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash 122066176, now seen corresponding path program 1 times [2021-11-25 18:17:39,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:39,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284431988] [2021-11-25 18:17:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:39,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:17:39,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:39,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284431988] [2021-11-25 18:17:39,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284431988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:17:39,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:17:39,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:17:39,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879445282] [2021-11-25 18:17:39,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:17:39,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:17:39,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:17:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:17:39,718 INFO L87 Difference]: Start difference. First operand 5316 states and 7699 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:40,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:40,739 INFO L93 Difference]: Finished difference Result 13642 states and 19855 transitions. [2021-11-25 18:17:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:17:40,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-25 18:17:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:40,788 INFO L225 Difference]: With dead ends: 13642 [2021-11-25 18:17:40,789 INFO L226 Difference]: Without dead ends: 8360 [2021-11-25 18:17:40,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:17:40,800 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 560 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:40,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 135 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:17:40,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2021-11-25 18:17:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8358. [2021-11-25 18:17:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8358 states, 8357 states have (on average 1.441306689003231) internal successors, (12045), 8357 states have internal predecessors, (12045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8358 states to 8358 states and 12045 transitions. [2021-11-25 18:17:41,612 INFO L78 Accepts]: Start accepts. Automaton has 8358 states and 12045 transitions. Word has length 64 [2021-11-25 18:17:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:41,612 INFO L470 AbstractCegarLoop]: Abstraction has 8358 states and 12045 transitions. [2021-11-25 18:17:41,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:41,612 INFO L276 IsEmpty]: Start isEmpty. Operand 8358 states and 12045 transitions. [2021-11-25 18:17:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 18:17:41,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:41,613 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:17:41,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:17:41,614 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:41,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:41,615 INFO L85 PathProgramCache]: Analyzing trace with hash 257827387, now seen corresponding path program 1 times [2021-11-25 18:17:41,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:41,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704009119] [2021-11-25 18:17:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:41,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:17:41,888 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:41,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704009119] [2021-11-25 18:17:41,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704009119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:17:41,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:17:41,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 18:17:41,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889092228] [2021-11-25 18:17:41,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:17:41,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:17:41,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:17:41,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:17:41,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:17:41,891 INFO L87 Difference]: Start difference. First operand 8358 states and 12045 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:17:43,708 INFO L93 Difference]: Finished difference Result 15832 states and 22895 transitions. [2021-11-25 18:17:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:17:43,708 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-25 18:17:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:17:43,778 INFO L225 Difference]: With dead ends: 15832 [2021-11-25 18:17:43,778 INFO L226 Difference]: Without dead ends: 15830 [2021-11-25 18:17:43,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:17:43,783 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 1318 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1318 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:17:43,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1318 Valid, 2161 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:17:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15830 states. [2021-11-25 18:17:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15830 to 8746. [2021-11-25 18:17:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8746 states, 8745 states have (on average 1.441852487135506) internal successors, (12609), 8745 states have internal predecessors, (12609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8746 states to 8746 states and 12609 transitions. [2021-11-25 18:17:44,655 INFO L78 Accepts]: Start accepts. Automaton has 8746 states and 12609 transitions. Word has length 64 [2021-11-25 18:17:44,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:17:44,656 INFO L470 AbstractCegarLoop]: Abstraction has 8746 states and 12609 transitions. [2021-11-25 18:17:44,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:17:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 8746 states and 12609 transitions. [2021-11-25 18:17:44,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:17:44,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:17:44,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:17:44,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:17:44,659 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:17:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:17:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2054645450, now seen corresponding path program 1 times [2021-11-25 18:17:44,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:17:44,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188101414] [2021-11-25 18:17:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:44,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:17:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:17:45,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:17:45,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188101414] [2021-11-25 18:17:45,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188101414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:17:45,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831988890] [2021-11-25 18:17:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:17:45,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:17:45,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:17:45,606 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:17:45,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2219d86-26e9-40a2-8e49-ffedac7aec1a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:17:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:17:45,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-25 18:17:45,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:17:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:17:49,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:18:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:18:17,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831988890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:18:17,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1386066059] [2021-11-25 18:18:17,130 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2021-11-25 18:18:17,130 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:18:17,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:18:17,143 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:18:17,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:18:17,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:18:17,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:18:17,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:18:17,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:18:17,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2021-11-25 18:18:17,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:17,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:17,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:17,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:17,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:17,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:17,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:17,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:17,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:17,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:18:17,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 20 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2021-11-25 18:18:44,740 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:19:30,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '106232#(and (<= 0 ~send5~0) (<= ~send3~0 127) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (= ~nomsg~0 ~p4_new~0) (= ~p4~0 0) (<= ~st3~0 0) (<= 0 ~mode1~0) (<= 0 ~mode4~0) (<= 0 ~send4~0) (<= 0 ~id5~0) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_58583~0) (<= 0 ~id1~0) (<= ~__return_58418~0 1) (= ~nomsg~0 ~p5_new~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (= ~p2~0 0) (= ~p5~0 0) (<= 0 ~mode3~0) (<= ~send1~0 127) (<= 0 (+ ~p5_old~0 1)) (<= ~st5~0 0) (= ~p3_new~0 ~nomsg~0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= ~mode2~0 1) (<= (+ ~p5_old~0 1) 0) (<= ~mode5~0 1) (<= (+ ~p4_old~0 1) 0) (<= ~id5~0 127) (<= 0 ~st2~0) (or (< 1 (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0)) (and (<= 5 (mod ~r1~0 256)) (not (= (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)))) (<= ~mode3~0 1) (= |ULTIMATE.start_main_~check__tmp~0#1| ~__return_58583~0) (<= 0 ~st5~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (= ~nomsg~0 ~p2_new~0) (= ~st1~0 0) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= (+ |ULTIMATE.start_main_~node5__m5~0#1| 1) 0) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= ~st4~0 0) (<= 0 (+ |ULTIMATE.start_main_~node5__m5~0#1| 1)) (<= 0 ~id4~0) (<= 1 ~__return_58418~0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= ~send5~0 127) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 ~send3~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (= ~__return_main~0 0) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 ~mode5~0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2021-11-25 18:19:30,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:19:30,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:19:30,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 53 [2021-11-25 18:19:30,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817798323] [2021-11-25 18:19:30,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:19:30,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-25 18:19:30,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:19:30,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-25 18:19:30,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1913, Invalid=11197, Unknown=0, NotChecked=0, Total=13110 [2021-11-25 18:19:30,791 INFO L87 Difference]: Start difference. First operand 8746 states and 12609 transitions. Second operand has 53 states, 53 states have (on average 4.245283018867925) internal successors, (225), 53 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:24:34,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:34,579 INFO L93 Difference]: Finished difference Result 220684 states and 318284 transitions. [2021-11-25 18:24:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 528 states. [2021-11-25 18:24:34,580 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.245283018867925) internal successors, (225), 53 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-25 18:24:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:35,430 INFO L225 Difference]: With dead ends: 220684 [2021-11-25 18:24:35,430 INFO L226 Difference]: Without dead ends: 212000 [2021-11-25 18:24:35,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 636 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191393 ImplicationChecksByTransitivity, 276.4s TimeCoverageRelationStatistics Valid=57516, Invalid=348890, Unknown=0, NotChecked=0, Total=406406 [2021-11-25 18:24:35,597 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 21191 mSDsluCounter, 12699 mSDsCounter, 0 mSdLazyCounter, 17904 mSolverCounterSat, 1371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21191 SdHoareTripleChecker+Valid, 13082 SdHoareTripleChecker+Invalid, 19275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1371 IncrementalHoareTripleChecker+Valid, 17904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:35,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21191 Valid, 13082 Invalid, 19275 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1371 Valid, 17904 Invalid, 0 Unknown, 0 Unchecked, 27.8s Time] [2021-11-25 18:24:35,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212000 states.