./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 291c2115713bbaa0f9f6deebfd096e226de91dfa7091a11105c0815d1cda6526 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:49:11,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:49:11,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:49:11,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:49:11,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:49:11,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:49:11,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:49:11,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:49:11,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:49:11,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:49:11,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:49:11,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:49:11,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:49:11,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:49:11,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:49:11,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:49:11,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:49:11,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:49:11,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:49:11,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:49:11,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:49:11,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:49:11,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:49:11,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:49:11,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:49:11,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:49:11,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:49:11,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:49:11,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:49:11,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:49:11,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:49:11,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:49:11,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:49:11,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:49:11,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:49:11,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:49:11,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:49:11,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:49:11,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:49:11,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:49:11,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:49:11,392 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:49:11,408 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:49:11,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:49:11,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:49:11,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:49:11,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:49:11,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:49:11,409 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:49:11,409 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:49:11,409 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:49:11,410 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:49:11,410 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:49:11,410 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:49:11,410 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:49:11,410 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:49:11,410 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:49:11,410 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:49:11,411 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:49:11,411 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:49:11,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:49:11,412 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:49:11,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:49:11,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:49:11,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:49:11,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:49:11,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:49:11,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:49:11,413 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:49:11,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:49:11,413 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:49:11,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:49:11,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:49:11,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:49:11,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:49:11,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:49:11,414 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:49:11,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:49:11,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:49:11,414 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:49:11,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:49:11,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:49:11,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:49:11,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 291c2115713bbaa0f9f6deebfd096e226de91dfa7091a11105c0815d1cda6526 [2022-12-14 07:49:11,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:49:11,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:49:11,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:49:11,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:49:11,610 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:49:11,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 07:49:14,208 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:49:14,388 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:49:14,388 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 07:49:14,399 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/data/e8b371b54/e70c1522b6f74219aaa87c74127f562b/FLAG605e42b4f [2022-12-14 07:49:14,412 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/data/e8b371b54/e70c1522b6f74219aaa87c74127f562b [2022-12-14 07:49:14,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:49:14,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:49:14,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:49:14,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:49:14,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:49:14,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@482bcdfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14, skipping insertion in model container [2022-12-14 07:49:14,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:49:14,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:49:14,655 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2022-12-14 07:49:14,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:49:14,696 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:49:14,726 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2022-12-14 07:49:14,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:49:14,754 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:49:14,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14 WrapperNode [2022-12-14 07:49:14,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:49:14,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:49:14,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:49:14,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:49:14,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,793 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 572 [2022-12-14 07:49:14,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:49:14,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:49:14,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:49:14,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:49:14,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,814 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:49:14,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:49:14,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:49:14,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:49:14,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14" (1/1) ... [2022-12-14 07:49:14,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:49:14,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:49:14,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:49:14,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:49:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:49:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:49:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:49:14,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:49:14,978 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:49:14,980 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:49:15,378 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:49:15,576 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:49:15,576 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 07:49:15,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:49:15 BoogieIcfgContainer [2022-12-14 07:49:15,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:49:15,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:49:15,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:49:15,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:49:15,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:49:14" (1/3) ... [2022-12-14 07:49:15,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfdcf5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:49:15, skipping insertion in model container [2022-12-14 07:49:15,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:14" (2/3) ... [2022-12-14 07:49:15,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfdcf5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:49:15, skipping insertion in model container [2022-12-14 07:49:15,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:49:15" (3/3) ... [2022-12-14 07:49:15,585 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 07:49:15,601 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:49:15,601 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:49:15,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:49:15,648 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27ce81b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:49:15,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:49:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.7564102564102564) internal successors, (137), 85 states have internal predecessors, (137), 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) [2022-12-14 07:49:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 07:49:15,658 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:15,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:15,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:49:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:15,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1950120887, now seen corresponding path program 1 times [2022-12-14 07:49:15,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:15,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948504403] [2022-12-14 07:49:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:15,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:15,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:15,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948504403] [2022-12-14 07:49:15,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948504403] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:49:15,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:49:15,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:49:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322387366] [2022-12-14 07:49:15,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:49:15,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:49:15,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:49:15,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:49:15,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:15,940 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.7564102564102564) internal successors, (137), 85 states have internal predecessors, (137), 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 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-12-14 07:49:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:16,015 INFO L93 Difference]: Finished difference Result 200 states and 302 transitions. [2022-12-14 07:49:16,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:49:16,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 31 [2022-12-14 07:49:16,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:16,027 INFO L225 Difference]: With dead ends: 200 [2022-12-14 07:49:16,027 INFO L226 Difference]: Without dead ends: 121 [2022-12-14 07:49:16,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:16,034 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 92 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:16,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 297 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:49:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-14 07:49:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2022-12-14 07:49:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.4406779661016949) internal successors, (170), 118 states have internal predecessors, (170), 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) [2022-12-14 07:49:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 170 transitions. [2022-12-14 07:49:16,089 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 170 transitions. Word has length 31 [2022-12-14 07:49:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:16,090 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 170 transitions. [2022-12-14 07:49:16,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-12-14 07:49:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 170 transitions. [2022-12-14 07:49:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 07:49:16,091 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:16,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:16,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:49:16,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:49:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:16,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1837863327, now seen corresponding path program 1 times [2022-12-14 07:49:16,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:16,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47756896] [2022-12-14 07:49:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:16,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:16,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:16,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47756896] [2022-12-14 07:49:16,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47756896] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:49:16,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:49:16,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:49:16,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196781512] [2022-12-14 07:49:16,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:49:16,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:49:16,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:49:16,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:49:16,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:16,238 INFO L87 Difference]: Start difference. First operand 119 states and 170 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-12-14 07:49:16,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:16,313 INFO L93 Difference]: Finished difference Result 270 states and 401 transitions. [2022-12-14 07:49:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:49:16,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 33 [2022-12-14 07:49:16,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:16,315 INFO L225 Difference]: With dead ends: 270 [2022-12-14 07:49:16,315 INFO L226 Difference]: Without dead ends: 174 [2022-12-14 07:49:16,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:16,317 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 77 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:16,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 176 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:49:16,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-12-14 07:49:16,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-12-14 07:49:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.456140350877193) internal successors, (249), 171 states have internal predecessors, (249), 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) [2022-12-14 07:49:16,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 249 transitions. [2022-12-14 07:49:16,341 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 249 transitions. Word has length 33 [2022-12-14 07:49:16,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:16,341 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 249 transitions. [2022-12-14 07:49:16,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-12-14 07:49:16,342 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 249 transitions. [2022-12-14 07:49:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 07:49:16,343 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:16,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:16,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:49:16,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:49:16,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:16,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1576039986, now seen corresponding path program 1 times [2022-12-14 07:49:16,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:16,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976869237] [2022-12-14 07:49:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:16,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:16,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:16,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976869237] [2022-12-14 07:49:16,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976869237] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:49:16,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:49:16,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:49:16,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704985677] [2022-12-14 07:49:16,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:49:16,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:49:16,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:49:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:49:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:16,422 INFO L87 Difference]: Start difference. First operand 172 states and 249 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-12-14 07:49:16,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:16,488 INFO L93 Difference]: Finished difference Result 432 states and 642 transitions. [2022-12-14 07:49:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:49:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 35 [2022-12-14 07:49:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:16,491 INFO L225 Difference]: With dead ends: 432 [2022-12-14 07:49:16,491 INFO L226 Difference]: Without dead ends: 284 [2022-12-14 07:49:16,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:16,493 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 77 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:16,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 219 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:49:16,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-12-14 07:49:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 282. [2022-12-14 07:49:16,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.4697508896797153) internal successors, (413), 281 states have internal predecessors, (413), 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) [2022-12-14 07:49:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 413 transitions. [2022-12-14 07:49:16,529 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 413 transitions. Word has length 35 [2022-12-14 07:49:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:16,530 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 413 transitions. [2022-12-14 07:49:16,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-12-14 07:49:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 413 transitions. [2022-12-14 07:49:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 07:49:16,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:16,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:16,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:49:16,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:49:16,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:16,532 INFO L85 PathProgramCache]: Analyzing trace with hash 280342147, now seen corresponding path program 1 times [2022-12-14 07:49:16,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:16,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16563422] [2022-12-14 07:49:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:16,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:16,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16563422] [2022-12-14 07:49:16,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16563422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:49:16,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:49:16,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:49:16,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862600750] [2022-12-14 07:49:16,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:49:16,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:49:16,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:49:16,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:49:16,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:16,610 INFO L87 Difference]: Start difference. First operand 282 states and 413 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-12-14 07:49:16,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:16,684 INFO L93 Difference]: Finished difference Result 701 states and 1046 transitions. [2022-12-14 07:49:16,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:49:16,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 37 [2022-12-14 07:49:16,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:16,688 INFO L225 Difference]: With dead ends: 701 [2022-12-14 07:49:16,688 INFO L226 Difference]: Without dead ends: 443 [2022-12-14 07:49:16,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:16,690 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 76 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:16,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 193 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:49:16,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-12-14 07:49:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 441. [2022-12-14 07:49:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.4840909090909091) internal successors, (653), 440 states have internal predecessors, (653), 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) [2022-12-14 07:49:16,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 653 transitions. [2022-12-14 07:49:16,739 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 653 transitions. Word has length 37 [2022-12-14 07:49:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:16,739 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 653 transitions. [2022-12-14 07:49:16,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-12-14 07:49:16,739 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 653 transitions. [2022-12-14 07:49:16,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 07:49:16,740 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:16,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:16,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:49:16,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:49:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:16,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1520992566, now seen corresponding path program 1 times [2022-12-14 07:49:16,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:16,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92426553] [2022-12-14 07:49:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:16,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:16,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:16,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92426553] [2022-12-14 07:49:16,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92426553] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:49:16,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:49:16,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:49:16,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487702713] [2022-12-14 07:49:16,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:49:16,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:49:16,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:49:16,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:49:16,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:16,807 INFO L87 Difference]: Start difference. First operand 441 states and 653 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2022-12-14 07:49:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:16,908 INFO L93 Difference]: Finished difference Result 1141 states and 1702 transitions. [2022-12-14 07:49:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:49:16,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 39 [2022-12-14 07:49:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:16,911 INFO L225 Difference]: With dead ends: 1141 [2022-12-14 07:49:16,911 INFO L226 Difference]: Without dead ends: 737 [2022-12-14 07:49:16,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:16,914 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 72 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:16,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 200 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:49:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-12-14 07:49:16,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 735. [2022-12-14 07:49:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 1.4741144414168936) internal successors, (1082), 734 states have internal predecessors, (1082), 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) [2022-12-14 07:49:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1082 transitions. [2022-12-14 07:49:16,994 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1082 transitions. Word has length 39 [2022-12-14 07:49:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:16,995 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1082 transitions. [2022-12-14 07:49:16,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2022-12-14 07:49:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1082 transitions. [2022-12-14 07:49:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 07:49:16,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:16,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:16,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:49:16,996 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:49:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1937092237, now seen corresponding path program 1 times [2022-12-14 07:49:16,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:16,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123892333] [2022-12-14 07:49:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:16,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:17,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:17,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123892333] [2022-12-14 07:49:17,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123892333] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:49:17,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:49:17,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:49:17,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160704856] [2022-12-14 07:49:17,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:49:17,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:49:17,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:49:17,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:49:17,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:17,053 INFO L87 Difference]: Start difference. First operand 735 states and 1082 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2022-12-14 07:49:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:17,138 INFO L93 Difference]: Finished difference Result 1850 states and 2750 transitions. [2022-12-14 07:49:17,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:49:17,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2022-12-14 07:49:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:17,142 INFO L225 Difference]: With dead ends: 1850 [2022-12-14 07:49:17,142 INFO L226 Difference]: Without dead ends: 1152 [2022-12-14 07:49:17,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:17,144 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 71 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:17,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 195 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:49:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-12-14 07:49:17,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1150. [2022-12-14 07:49:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.4804177545691906) internal successors, (1701), 1149 states have internal predecessors, (1701), 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) [2022-12-14 07:49:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1701 transitions. [2022-12-14 07:49:17,209 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1701 transitions. Word has length 41 [2022-12-14 07:49:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:17,210 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 1701 transitions. [2022-12-14 07:49:17,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2022-12-14 07:49:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1701 transitions. [2022-12-14 07:49:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 07:49:17,210 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:17,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:17,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:49:17,211 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:49:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash -328472262, now seen corresponding path program 1 times [2022-12-14 07:49:17,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:17,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205617364] [2022-12-14 07:49:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:17,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:17,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:17,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205617364] [2022-12-14 07:49:17,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205617364] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:49:17,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:49:17,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:49:17,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276187923] [2022-12-14 07:49:17,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:49:17,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:49:17,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:49:17,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:49:17,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:49:17,290 INFO L87 Difference]: Start difference. First operand 1150 states and 1701 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2022-12-14 07:49:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:17,580 INFO L93 Difference]: Finished difference Result 2925 states and 4354 transitions. [2022-12-14 07:49:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:49:17,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 43 [2022-12-14 07:49:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:17,587 INFO L225 Difference]: With dead ends: 2925 [2022-12-14 07:49:17,587 INFO L226 Difference]: Without dead ends: 1807 [2022-12-14 07:49:17,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:49:17,590 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 435 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:17,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 777 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:49:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-12-14 07:49:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1781. [2022-12-14 07:49:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1780 states have (on average 1.4887640449438202) internal successors, (2650), 1780 states have internal predecessors, (2650), 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) [2022-12-14 07:49:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2650 transitions. [2022-12-14 07:49:17,760 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2650 transitions. Word has length 43 [2022-12-14 07:49:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:17,760 INFO L495 AbstractCegarLoop]: Abstraction has 1781 states and 2650 transitions. [2022-12-14 07:49:17,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2022-12-14 07:49:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2650 transitions. [2022-12-14 07:49:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 07:49:17,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:17,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:17,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:49:17,762 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:49:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:17,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1655209736, now seen corresponding path program 1 times [2022-12-14 07:49:17,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:17,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055308259] [2022-12-14 07:49:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:17,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:17,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:17,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055308259] [2022-12-14 07:49:17,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055308259] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:49:17,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:49:17,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:49:17,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477950690] [2022-12-14 07:49:17,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:49:17,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:49:17,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:49:17,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:49:17,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:49:17,839 INFO L87 Difference]: Start difference. First operand 1781 states and 2650 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2022-12-14 07:49:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:18,025 INFO L93 Difference]: Finished difference Result 3514 states and 5239 transitions. [2022-12-14 07:49:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:49:18,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 44 [2022-12-14 07:49:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:18,030 INFO L225 Difference]: With dead ends: 3514 [2022-12-14 07:49:18,030 INFO L226 Difference]: Without dead ends: 1783 [2022-12-14 07:49:18,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:49:18,032 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 144 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:18,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 276 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:49:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-12-14 07:49:18,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1778. [2022-12-14 07:49:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 1.4828362408553741) internal successors, (2635), 1777 states have internal predecessors, (2635), 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) [2022-12-14 07:49:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2635 transitions. [2022-12-14 07:49:18,135 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2635 transitions. Word has length 44 [2022-12-14 07:49:18,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:18,135 INFO L495 AbstractCegarLoop]: Abstraction has 1778 states and 2635 transitions. [2022-12-14 07:49:18,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2022-12-14 07:49:18,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2635 transitions. [2022-12-14 07:49:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 07:49:18,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:18,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:18,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:49:18,137 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:49:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:18,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2032938707, now seen corresponding path program 1 times [2022-12-14 07:49:18,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:18,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035876837] [2022-12-14 07:49:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:18,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:18,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:18,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035876837] [2022-12-14 07:49:18,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035876837] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:49:18,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:49:18,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:49:18,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407455164] [2022-12-14 07:49:18,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:49:18,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:49:18,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:49:18,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:49:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:49:18,290 INFO L87 Difference]: Start difference. First operand 1778 states and 2635 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2022-12-14 07:49:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:18,525 INFO L93 Difference]: Finished difference Result 2946 states and 4310 transitions. [2022-12-14 07:49:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:49:18,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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 52 [2022-12-14 07:49:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:18,535 INFO L225 Difference]: With dead ends: 2946 [2022-12-14 07:49:18,535 INFO L226 Difference]: Without dead ends: 2944 [2022-12-14 07:49:18,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:49:18,537 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 146 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:18,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 548 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:49:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2022-12-14 07:49:18,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 1822. [2022-12-14 07:49:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 1.458539264140582) internal successors, (2656), 1821 states have internal predecessors, (2656), 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) [2022-12-14 07:49:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2656 transitions. [2022-12-14 07:49:18,678 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2656 transitions. Word has length 52 [2022-12-14 07:49:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:18,678 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2656 transitions. [2022-12-14 07:49:18,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2022-12-14 07:49:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2656 transitions. [2022-12-14 07:49:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 07:49:18,679 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:18,679 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 07:49:18,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:49:18,679 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:49:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1989064409, now seen corresponding path program 1 times [2022-12-14 07:49:18,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:18,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071760047] [2022-12-14 07:49:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:18,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:19,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:19,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071760047] [2022-12-14 07:49:19,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071760047] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:49:19,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525311001] [2022-12-14 07:49:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:19,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:49:19,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:49:19,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:49:19,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1b0c7ce-cc99-4d53-9ef2-000e41ab722f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:49:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:19,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 07:49:19,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:49:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:49:20,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:49:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:23,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525311001] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:49:23,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991328919] [2022-12-14 07:49:23,643 INFO L159 IcfgInterpreter]: Started Sifa with 53 locations of interest [2022-12-14 07:49:23,643 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:49:23,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:49:23,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:49:23,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:49:23,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:23,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:23,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 07:49:23,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:23,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:23,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:23,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-12-14 07:49:23,974 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 07:49:31,073 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 07:59:40,886 WARN L233 SmtUtils]: Spent 13.02s on a formula simplification that was a NOOP. DAG size: 502 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 07:59:58,061 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 481 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 08:02:08,344 WARN L233 SmtUtils]: Spent 9.79s on a formula simplification that was a NOOP. DAG size: 494 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)