./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS --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 ed935744e0b15a55a11878fa4d21c1a0b8f1c4098e81aa4afd54cd8910ee834a --- 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-8393723 [2022-11-19 08:26:23,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:26:23,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:26:23,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:26:23,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:26:23,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:26:23,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:26:23,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:26:23,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:26:23,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:26:23,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:26:23,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:26:23,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:26:23,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:26:23,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:26:23,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:26:23,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:26:23,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:26:23,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:26:23,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:26:23,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:26:23,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:26:23,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:26:23,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:26:23,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:26:23,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:26:23,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:26:23,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:26:23,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:26:23,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:26:23,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:26:23,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:26:23,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:26:23,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:26:23,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:26:23,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:26:23,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:26:23,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:26:23,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:26:23,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:26:23,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:26:23,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:26:23,985 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:26:23,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:26:23,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:26:23,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:26:23,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:26:23,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:26:23,989 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:26:23,989 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:26:23,990 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:26:23,990 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:26:23,991 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:26:23,992 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:26:23,992 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:26:23,992 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:26:23,993 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:26:23,993 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:26:23,993 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:26:23,994 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:26:23,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:26:23,995 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:26:23,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:26:23,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:26:23,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:26:23,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:26:23,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:26:23,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:26:23,999 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:26:23,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:26:24,000 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:26:24,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:26:24,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:26:24,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:26:24,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:26:24,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:26:24,003 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:26:24,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:26:24,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:26:24,004 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:26:24,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:26:24,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:26:24,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:26:24,006 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_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed935744e0b15a55a11878fa4d21c1a0b8f1c4098e81aa4afd54cd8910ee834a [2022-11-19 08:26:24,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:26:24,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:26:24,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:26:24,450 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:26:24,451 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:26:24,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c [2022-11-19 08:26:24,542 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/data/c3b939eb2/1b0b5935a91e4b69841b3e7239cae849/FLAGe197d44a7 [2022-11-19 08:26:25,259 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:26:25,259 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c [2022-11-19 08:26:25,274 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/data/c3b939eb2/1b0b5935a91e4b69841b3e7239cae849/FLAGe197d44a7 [2022-11-19 08:26:25,466 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/data/c3b939eb2/1b0b5935a91e4b69841b3e7239cae849 [2022-11-19 08:26:25,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:26:25,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:26:25,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:26:25,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:26:25,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:26:25,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:26:25" (1/1) ... [2022-11-19 08:26:25,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f047f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:25, skipping insertion in model container [2022-11-19 08:26:25,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:26:25" (1/1) ... [2022-11-19 08:26:25,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:26:25,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:26:26,142 WARN L234 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_b1e576f4-7283-4a74-aac0-9137cbdae3ed/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c[26792,26805] [2022-11-19 08:26:26,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:26:26,166 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:26:26,317 WARN L234 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_b1e576f4-7283-4a74-aac0-9137cbdae3ed/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c[26792,26805] [2022-11-19 08:26:26,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:26:26,350 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:26:26,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26 WrapperNode [2022-11-19 08:26:26,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:26:26,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:26:26,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:26:26,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:26:26,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,488 INFO L138 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 936 [2022-11-19 08:26:26,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:26:26,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:26:26,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:26:26,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:26:26,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,596 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:26:26,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:26:26,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:26:26,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:26:26,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:26:26,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:26:26,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:26:26,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:26:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:26:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:26:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:26:26,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:26:26,885 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:26:26,888 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:26:28,430 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:26:29,686 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:26:29,687 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:26:29,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:26:29 BoogieIcfgContainer [2022-11-19 08:26:29,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:26:29,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:26:29,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:26:29,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:26:29,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:26:25" (1/3) ... [2022-11-19 08:26:29,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@381c5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:26:29, skipping insertion in model container [2022-11-19 08:26:29,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26" (2/3) ... [2022-11-19 08:26:29,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@381c5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:26:29, skipping insertion in model container [2022-11-19 08:26:29,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:26:29" (3/3) ... [2022-11-19 08:26:29,704 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c [2022-11-19 08:26:29,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:26:29,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:26:29,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:26:29,801 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;@767328ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:26:29,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:26:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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) [2022-11-19 08:26:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 08:26:29,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:29,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:29,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:29,827 INFO L85 PathProgramCache]: Analyzing trace with hash 78886728, now seen corresponding path program 1 times [2022-11-19 08:26:29,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:29,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421720718] [2022-11-19 08:26:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:29,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:34,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:34,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421720718] [2022-11-19 08:26:34,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421720718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:34,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:34,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:26:34,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499897813] [2022-11-19 08:26:34,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:34,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:26:34,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:34,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:26:34,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:34,805 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2022-11-19 08:26:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:35,163 INFO L93 Difference]: Finished difference Result 177 states and 288 transitions. [2022-11-19 08:26:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:26:35,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2022-11-19 08:26:35,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:35,178 INFO L225 Difference]: With dead ends: 177 [2022-11-19 08:26:35,179 INFO L226 Difference]: Without dead ends: 158 [2022-11-19 08:26:35,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:35,186 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 26 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:35,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 372 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:26:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-19 08:26:35,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2022-11-19 08:26:35,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 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) [2022-11-19 08:26:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2022-11-19 08:26:35,240 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2022-11-19 08:26:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:35,242 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2022-11-19 08:26:35,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2022-11-19 08:26:35,242 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2022-11-19 08:26:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 08:26:35,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:35,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:35,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:26:35,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:35,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1917653551, now seen corresponding path program 1 times [2022-11-19 08:26:35,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:35,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490594341] [2022-11-19 08:26:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:35,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:37,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:37,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490594341] [2022-11-19 08:26:37,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490594341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:37,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:37,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:26:37,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307183777] [2022-11-19 08:26:37,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:37,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:26:37,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:37,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:26:37,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:37,596 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2022-11-19 08:26:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:37,904 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2022-11-19 08:26:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:26:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 55 [2022-11-19 08:26:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:37,907 INFO L225 Difference]: With dead ends: 180 [2022-11-19 08:26:37,907 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 08:26:37,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:37,909 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 24 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:37,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:26:37,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 08:26:37,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-11-19 08:26:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 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) [2022-11-19 08:26:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2022-11-19 08:26:37,941 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2022-11-19 08:26:37,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:37,942 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2022-11-19 08:26:37,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2022-11-19 08:26:37,943 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2022-11-19 08:26:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 08:26:37,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:37,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:37,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:26:37,946 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:37,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash 619558993, now seen corresponding path program 1 times [2022-11-19 08:26:37,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:37,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038277166] [2022-11-19 08:26:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:37,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:40,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:40,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038277166] [2022-11-19 08:26:40,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038277166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:40,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:40,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:26:40,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400351386] [2022-11-19 08:26:40,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:40,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:26:40,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:40,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:26:40,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:40,250 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:40,529 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2022-11-19 08:26:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:26:40,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-19 08:26:40,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:40,532 INFO L225 Difference]: With dead ends: 180 [2022-11-19 08:26:40,532 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 08:26:40,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:40,534 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:40,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:26:40,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 08:26:40,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-11-19 08:26:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 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) [2022-11-19 08:26:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2022-11-19 08:26:40,570 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2022-11-19 08:26:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:40,571 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2022-11-19 08:26:40,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2022-11-19 08:26:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2022-11-19 08:26:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 08:26:40,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:40,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:40,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:26:40,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:40,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1969188282, now seen corresponding path program 1 times [2022-11-19 08:26:40,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:40,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554499819] [2022-11-19 08:26:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:40,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:42,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:42,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554499819] [2022-11-19 08:26:42,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554499819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:42,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:42,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:26:42,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85012806] [2022-11-19 08:26:42,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:42,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:26:42,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:42,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:26:42,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:42,962 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-11-19 08:26:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:43,183 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2022-11-19 08:26:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:26:43,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2022-11-19 08:26:43,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:43,187 INFO L225 Difference]: With dead ends: 180 [2022-11-19 08:26:43,187 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 08:26:43,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:43,189 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:43,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 383 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:26:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 08:26:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-11-19 08:26:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 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) [2022-11-19 08:26:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2022-11-19 08:26:43,210 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2022-11-19 08:26:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:43,213 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2022-11-19 08:26:43,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-11-19 08:26:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2022-11-19 08:26:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 08:26:43,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:43,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:43,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:26:43,222 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:43,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:43,223 INFO L85 PathProgramCache]: Analyzing trace with hash 863475034, now seen corresponding path program 1 times [2022-11-19 08:26:43,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:43,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030610351] [2022-11-19 08:26:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:43,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:45,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:45,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030610351] [2022-11-19 08:26:45,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030610351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:45,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:45,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:26:45,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823039141] [2022-11-19 08:26:45,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:45,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:26:45,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:45,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:26:45,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:45,359 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2022-11-19 08:26:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:45,589 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2022-11-19 08:26:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:26:45,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2022-11-19 08:26:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:45,592 INFO L225 Difference]: With dead ends: 180 [2022-11-19 08:26:45,592 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 08:26:45,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:45,594 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 18 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:45,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 382 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:26:45,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 08:26:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-11-19 08:26:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 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) [2022-11-19 08:26:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2022-11-19 08:26:45,608 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2022-11-19 08:26:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:45,609 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2022-11-19 08:26:45,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2022-11-19 08:26:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2022-11-19 08:26:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 08:26:45,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:45,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:45,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:26:45,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:45,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash -605562238, now seen corresponding path program 1 times [2022-11-19 08:26:45,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:45,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033157743] [2022-11-19 08:26:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:45,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:48,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:48,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033157743] [2022-11-19 08:26:48,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033157743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:48,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:48,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:26:48,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186724528] [2022-11-19 08:26:48,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:48,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:26:48,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:48,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:26:48,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:48,607 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2022-11-19 08:26:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:48,829 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2022-11-19 08:26:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:26:48,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 60 [2022-11-19 08:26:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:48,831 INFO L225 Difference]: With dead ends: 178 [2022-11-19 08:26:48,831 INFO L226 Difference]: Without dead ends: 158 [2022-11-19 08:26:48,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:48,833 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:48,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 377 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:26:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-19 08:26:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2022-11-19 08:26:48,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 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) [2022-11-19 08:26:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2022-11-19 08:26:48,858 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2022-11-19 08:26:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:48,859 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2022-11-19 08:26:48,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2022-11-19 08:26:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2022-11-19 08:26:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 08:26:48,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:48,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:48,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:26:48,862 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:48,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:48,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1680575823, now seen corresponding path program 1 times [2022-11-19 08:26:48,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:48,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403641390] [2022-11-19 08:26:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:48,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:50,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:50,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403641390] [2022-11-19 08:26:50,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403641390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:50,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:50,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:26:50,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513510875] [2022-11-19 08:26:50,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:50,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:26:50,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:50,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:26:50,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:50,883 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2022-11-19 08:26:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:51,123 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2022-11-19 08:26:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:26:51,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2022-11-19 08:26:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:51,125 INFO L225 Difference]: With dead ends: 179 [2022-11-19 08:26:51,126 INFO L226 Difference]: Without dead ends: 159 [2022-11-19 08:26:51,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:51,127 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 12 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:51,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 564 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:26:51,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-19 08:26:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2022-11-19 08:26:51,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 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) [2022-11-19 08:26:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2022-11-19 08:26:51,143 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2022-11-19 08:26:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:51,143 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2022-11-19 08:26:51,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2022-11-19 08:26:51,144 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2022-11-19 08:26:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 08:26:51,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:51,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:51,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:26:51,146 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1385290839, now seen corresponding path program 1 times [2022-11-19 08:26:51,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:51,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612268882] [2022-11-19 08:26:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:51,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:53,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:53,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612268882] [2022-11-19 08:26:53,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612268882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:53,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:53,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:26:53,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977760968] [2022-11-19 08:26:53,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:53,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:26:53,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:53,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:26:53,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:53,649 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2022-11-19 08:26:53,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:53,849 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2022-11-19 08:26:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:26:53,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2022-11-19 08:26:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:53,852 INFO L225 Difference]: With dead ends: 179 [2022-11-19 08:26:53,852 INFO L226 Difference]: Without dead ends: 159 [2022-11-19 08:26:53,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:53,854 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 7 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:53,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 380 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:26:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-19 08:26:53,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2022-11-19 08:26:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 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) [2022-11-19 08:26:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2022-11-19 08:26:53,864 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2022-11-19 08:26:53,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:53,864 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2022-11-19 08:26:53,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2022-11-19 08:26:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2022-11-19 08:26:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 08:26:53,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:53,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:53,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:26:53,867 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:53,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:53,868 INFO L85 PathProgramCache]: Analyzing trace with hash -16782009, now seen corresponding path program 1 times [2022-11-19 08:26:53,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:53,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131909342] [2022-11-19 08:26:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:53,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:54,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:54,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131909342] [2022-11-19 08:26:54,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131909342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:54,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:54,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:26:54,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246430050] [2022-11-19 08:26:54,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:54,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:26:54,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:54,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:26:54,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:26:54,398 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:54,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:54,774 INFO L93 Difference]: Finished difference Result 201 states and 312 transitions. [2022-11-19 08:26:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:26:54,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-19 08:26:54,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:54,776 INFO L225 Difference]: With dead ends: 201 [2022-11-19 08:26:54,776 INFO L226 Difference]: Without dead ends: 181 [2022-11-19 08:26:54,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:26:54,778 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 45 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:54,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 776 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:26:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-19 08:26:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2022-11-19 08:26:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 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) [2022-11-19 08:26:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2022-11-19 08:26:54,789 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2022-11-19 08:26:54,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:54,790 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2022-11-19 08:26:54,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2022-11-19 08:26:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 08:26:54,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:54,792 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:54,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:26:54,793 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:54,793 INFO L85 PathProgramCache]: Analyzing trace with hash -472905369, now seen corresponding path program 1 times [2022-11-19 08:26:54,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:54,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581699342] [2022-11-19 08:26:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:54,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:27:22,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:22,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581699342] [2022-11-19 08:27:22,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581699342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:27:22,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468041949] [2022-11-19 08:27:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:22,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:27:22,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:27:22,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:27:22,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e576f4-7283-4a74-aac0-9137cbdae3ed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:27:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:22,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:27:22,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:28:25,370 INFO L328 TraceCheckSpWp]: Computing backward predicates...