./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0 --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 baa3d7d596cfacd752b448b2d94171196ab29c96dae98d968ce044a2cc25c48f --- 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-e04fb08 [2022-11-16 19:53:23,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:53:23,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:53:23,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:53:23,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:53:23,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:53:23,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:53:23,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:53:23,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:53:23,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:53:23,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:53:23,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:53:23,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:53:23,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:53:23,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:53:23,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:53:23,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:53:23,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:53:23,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:53:23,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:53:23,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:53:23,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:53:23,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:53:23,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:53:23,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:53:23,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:53:23,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:53:23,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:53:23,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:53:23,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:53:23,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:53:23,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:53:23,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:53:23,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:53:23,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:53:23,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:53:23,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:53:23,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:53:23,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:53:23,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:53:23,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:53:23,895 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:53:23,938 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:53:23,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:53:23,939 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:53:23,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:53:23,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:53:23,941 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:53:23,941 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:53:23,941 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:53:23,941 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:53:23,941 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:53:23,942 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:53:23,943 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:53:23,943 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:53:23,943 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:53:23,943 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:53:23,944 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:53:23,944 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:53:23,944 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:53:23,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:53:23,945 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:53:23,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:53:23,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:53:23,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:53:23,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:53:23,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:53:23,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:53:23,946 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:53:23,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:53:23,948 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:53:23,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:53:23,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:53:23,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:53:23,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:53:23,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:53:23,949 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:53:23,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:53:23,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:53:23,950 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:53:23,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:53:23,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:53:23,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:53:23,951 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_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> baa3d7d596cfacd752b448b2d94171196ab29c96dae98d968ce044a2cc25c48f [2022-11-16 19:53:24,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:53:24,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:53:24,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:53:24,266 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:53:24,267 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:53:24,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c [2022-11-16 19:53:24,336 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/data/5a3cf4b69/c33bec1de72e4e19823e29d29d3ad5ce/FLAG1f8079c91 [2022-11-16 19:53:25,403 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:53:25,404 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c [2022-11-16 19:53:25,454 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/data/5a3cf4b69/c33bec1de72e4e19823e29d29d3ad5ce/FLAG1f8079c91 [2022-11-16 19:53:25,722 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/data/5a3cf4b69/c33bec1de72e4e19823e29d29d3ad5ce [2022-11-16 19:53:25,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:53:25,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:53:25,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:53:25,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:53:25,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:53:25,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:53:25" (1/1) ... [2022-11-16 19:53:25,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a4c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:25, skipping insertion in model container [2022-11-16 19:53:25,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:53:25" (1/1) ... [2022-11-16 19:53:25,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:53:26,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:53:28,522 WARN L229 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_be4f5569-f357-4126-82dd-c0c9e0b6667a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c[380593,380606] [2022-11-16 19:53:28,552 WARN L229 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_be4f5569-f357-4126-82dd-c0c9e0b6667a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c[383339,383352] [2022-11-16 19:53:28,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:53:28,873 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:53:30,078 WARN L229 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_be4f5569-f357-4126-82dd-c0c9e0b6667a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c[380593,380606] [2022-11-16 19:53:30,084 WARN L229 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_be4f5569-f357-4126-82dd-c0c9e0b6667a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c[383339,383352] [2022-11-16 19:53:30,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:53:30,190 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:53:30,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30 WrapperNode [2022-11-16 19:53:30,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:53:30,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:53:30,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:53:30,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:53:30,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30" (1/1) ... [2022-11-16 19:53:30,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30" (1/1) ... [2022-11-16 19:53:30,737 INFO L138 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 13146 [2022-11-16 19:53:30,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:53:30,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:53:30,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:53:30,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:53:30,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30" (1/1) ... [2022-11-16 19:53:30,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30" (1/1) ... [2022-11-16 19:53:30,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30" (1/1) ... [2022-11-16 19:53:30,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30" (1/1) ... [2022-11-16 19:53:31,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30" (1/1) ... [2022-11-16 19:53:31,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30" (1/1) ... [2022-11-16 19:53:31,224 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30" (1/1) ... [2022-11-16 19:53:31,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30" (1/1) ... [2022-11-16 19:53:31,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:53:31,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:53:31,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:53:31,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:53:31,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30" (1/1) ... [2022-11-16 19:53:31,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:53:31,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:53:31,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:53:31,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:53:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:53:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-16 19:53:31,410 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-16 19:53:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 19:53:31,411 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 19:53:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-16 19:53:31,411 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-16 19:53:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-16 19:53:31,411 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-16 19:53:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-16 19:53:31,412 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-16 19:53:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-16 19:53:31,412 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-16 19:53:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-16 19:53:31,412 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-16 19:53:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:53:31,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:53:31,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:53:31,597 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:53:31,599 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:53:40,733 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:53:43,323 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:53:43,324 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-16 19:53:43,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:53:43 BoogieIcfgContainer [2022-11-16 19:53:43,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:53:43,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:53:43,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:53:43,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:53:43,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:53:25" (1/3) ... [2022-11-16 19:53:43,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aeec3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:53:43, skipping insertion in model container [2022-11-16 19:53:43,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:53:30" (2/3) ... [2022-11-16 19:53:43,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aeec3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:53:43, skipping insertion in model container [2022-11-16 19:53:43,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:53:43" (3/3) ... [2022-11-16 19:53:43,337 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.11.cil-1.c [2022-11-16 19:53:43,355 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:53:43,356 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 19:53:43,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:53:43,449 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;@2a1cdf3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:53:43,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 19:53:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-16 19:53:43,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 19:53:43,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:43,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:43,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:53:43,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:43,484 INFO L85 PathProgramCache]: Analyzing trace with hash 169745087, now seen corresponding path program 1 times [2022-11-16 19:53:43,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:53:43,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607058838] [2022-11-16 19:53:43,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:43,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:53:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:53:44,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:53:44,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607058838] [2022-11-16 19:53:44,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607058838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:44,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:53:44,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:53:44,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234460050] [2022-11-16 19:53:44,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:44,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:53:44,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:53:44,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:53:44,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:53:44,174 INFO L87 Difference]: Start difference. First operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 19:53:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:45,485 INFO L93 Difference]: Finished difference Result 3811 states and 7391 transitions. [2022-11-16 19:53:45,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:53:45,489 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), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2022-11-16 19:53:45,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:45,514 INFO L225 Difference]: With dead ends: 3811 [2022-11-16 19:53:45,515 INFO L226 Difference]: Without dead ends: 1984 [2022-11-16 19:53:45,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:53:45,530 INFO L413 NwaCegarLoop]: 3488 mSDtfsCounter, 3754 mSDsluCounter, 3392 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3754 SdHoareTripleChecker+Valid, 6880 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:45,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3754 Valid, 6880 Invalid, 728 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 19:53:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-11-16 19:53:45,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1983. [2022-11-16 19:53:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1921 states have (on average 1.9229567933368037) internal successors, (3694), 1925 states have internal predecessors, (3694), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-16 19:53:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3788 transitions. [2022-11-16 19:53:45,691 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3788 transitions. Word has length 65 [2022-11-16 19:53:45,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:45,693 INFO L495 AbstractCegarLoop]: Abstraction has 1983 states and 3788 transitions. [2022-11-16 19:53:45,694 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), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 19:53:45,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3788 transitions. [2022-11-16 19:53:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 19:53:45,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:45,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:45,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:53:45,707 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:53:45,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:45,708 INFO L85 PathProgramCache]: Analyzing trace with hash -107083479, now seen corresponding path program 1 times [2022-11-16 19:53:45,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:53:45,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240366210] [2022-11-16 19:53:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:45,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:53:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 19:53:46,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:53:46,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240366210] [2022-11-16 19:53:46,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240366210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:53:46,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357141484] [2022-11-16 19:53:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:46,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:46,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:53:46,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:53:46,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:53:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:46,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:53:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 19:53:46,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:53:46,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357141484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:46,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:53:46,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 19:53:46,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906681046] [2022-11-16 19:53:46,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:46,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:53:46,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:53:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:53:46,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:46,486 INFO L87 Difference]: Start difference. First operand 1983 states and 3788 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:53:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:47,052 INFO L93 Difference]: Finished difference Result 2650 states and 4829 transitions. [2022-11-16 19:53:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:53:47,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-16 19:53:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:47,067 INFO L225 Difference]: With dead ends: 2650 [2022-11-16 19:53:47,067 INFO L226 Difference]: Without dead ends: 2313 [2022-11-16 19:53:47,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:47,071 INFO L413 NwaCegarLoop]: 3340 mSDtfsCounter, 3497 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:47,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3497 Valid, 3557 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:53:47,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-11-16 19:53:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2307. [2022-11-16 19:53:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2193 states have (on average 1.8718650250797995) internal successors, (4105), 2198 states have internal predecessors, (4105), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-16 19:53:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 4279 transitions. [2022-11-16 19:53:47,160 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 4279 transitions. Word has length 130 [2022-11-16 19:53:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:47,160 INFO L495 AbstractCegarLoop]: Abstraction has 2307 states and 4279 transitions. [2022-11-16 19:53:47,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:53:47,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 4279 transitions. [2022-11-16 19:53:47,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 19:53:47,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:47,174 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:47,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:53:47,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-16 19:53:47,381 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:53:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1210292569, now seen corresponding path program 1 times [2022-11-16 19:53:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:53:47,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653772075] [2022-11-16 19:53:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:47,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:53:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 19:53:47,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:53:47,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653772075] [2022-11-16 19:53:47,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653772075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:53:47,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644187325] [2022-11-16 19:53:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:47,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:47,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:53:47,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:53:47,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:53:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:47,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:53:48,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 19:53:48,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:53:48,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644187325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:48,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:53:48,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 19:53:48,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779977991] [2022-11-16 19:53:48,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:48,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:53:48,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:53:48,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:53:48,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:48,075 INFO L87 Difference]: Start difference. First operand 2307 states and 4279 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:53:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:48,663 INFO L93 Difference]: Finished difference Result 3616 states and 6318 transitions. [2022-11-16 19:53:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:53:48,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-16 19:53:48,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:48,683 INFO L225 Difference]: With dead ends: 3616 [2022-11-16 19:53:48,683 INFO L226 Difference]: Without dead ends: 2955 [2022-11-16 19:53:48,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:48,692 INFO L413 NwaCegarLoop]: 3339 mSDtfsCounter, 3509 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:48,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:53:48,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2022-11-16 19:53:48,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2947. [2022-11-16 19:53:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2731 states have (on average 1.7997070670084219) internal successors, (4915), 2738 states have internal predecessors, (4915), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2022-11-16 19:53:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 5245 transitions. [2022-11-16 19:53:48,846 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 5245 transitions. Word has length 130 [2022-11-16 19:53:48,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:48,847 INFO L495 AbstractCegarLoop]: Abstraction has 2947 states and 5245 transitions. [2022-11-16 19:53:48,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:53:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 5245 transitions. [2022-11-16 19:53:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 19:53:48,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:48,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:48,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 19:53:49,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:49,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:53:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash 116684581, now seen corresponding path program 1 times [2022-11-16 19:53:49,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:53:49,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220121911] [2022-11-16 19:53:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:49,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:53:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 19:53:49,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:53:49,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220121911] [2022-11-16 19:53:49,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220121911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:53:49,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623331165] [2022-11-16 19:53:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:49,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:49,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:53:49,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:53:49,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:53:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:49,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:53:49,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 19:53:49,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:53:49,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623331165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:49,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:53:49,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 19:53:49,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787661310] [2022-11-16 19:53:49,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:49,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:53:49,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:53:49,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:53:49,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:49,650 INFO L87 Difference]: Start difference. First operand 2947 states and 5245 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:53:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:50,287 INFO L93 Difference]: Finished difference Result 5524 states and 9246 transitions. [2022-11-16 19:53:50,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:53:50,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-16 19:53:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:50,309 INFO L225 Difference]: With dead ends: 5524 [2022-11-16 19:53:50,309 INFO L226 Difference]: Without dead ends: 4223 [2022-11-16 19:53:50,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:50,316 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3491 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:50,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3491 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:53:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2022-11-16 19:53:50,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4211. [2022-11-16 19:53:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 3795 states have (on average 1.7156785243741766) internal successors, (6511), 3806 states have internal predecessors, (6511), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2022-11-16 19:53:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 7145 transitions. [2022-11-16 19:53:50,537 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 7145 transitions. Word has length 130 [2022-11-16 19:53:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:50,537 INFO L495 AbstractCegarLoop]: Abstraction has 4211 states and 7145 transitions. [2022-11-16 19:53:50,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:53:50,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 7145 transitions. [2022-11-16 19:53:50,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 19:53:50,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:50,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:50,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:53:50,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:50,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:53:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:50,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1957579555, now seen corresponding path program 1 times [2022-11-16 19:53:50,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:53:50,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601953238] [2022-11-16 19:53:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:50,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:53:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 19:53:50,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:53:50,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601953238] [2022-11-16 19:53:50,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601953238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:53:50,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334266654] [2022-11-16 19:53:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:50,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:50,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:53:50,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:53:50,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:53:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:51,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:53:51,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 19:53:51,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:53:51,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334266654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:51,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:53:51,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 19:53:51,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118603932] [2022-11-16 19:53:51,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:51,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:53:51,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:53:51,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:53:51,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:51,266 INFO L87 Difference]: Start difference. First operand 4211 states and 7145 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:53:52,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:52,056 INFO L93 Difference]: Finished difference Result 9292 states and 15002 transitions. [2022-11-16 19:53:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:53:52,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-16 19:53:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:52,093 INFO L225 Difference]: With dead ends: 9292 [2022-11-16 19:53:52,093 INFO L226 Difference]: Without dead ends: 6727 [2022-11-16 19:53:52,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:52,108 INFO L413 NwaCegarLoop]: 3337 mSDtfsCounter, 3515 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3554 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:52,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 3554 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:53:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2022-11-16 19:53:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6707. [2022-11-16 19:53:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6707 states, 5899 states have (on average 1.6367180878114935) internal successors, (9655), 5918 states have internal predecessors, (9655), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2022-11-16 19:53:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 10881 transitions. [2022-11-16 19:53:52,483 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 10881 transitions. Word has length 130 [2022-11-16 19:53:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:52,484 INFO L495 AbstractCegarLoop]: Abstraction has 6707 states and 10881 transitions. [2022-11-16 19:53:52,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:53:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 10881 transitions. [2022-11-16 19:53:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 19:53:52,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:52,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:52,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:53:52,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:52,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:53:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2127267105, now seen corresponding path program 1 times [2022-11-16 19:53:52,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:53:52,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813715546] [2022-11-16 19:53:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:52,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:53:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 19:53:52,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:53:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813715546] [2022-11-16 19:53:52,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813715546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:53:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726867881] [2022-11-16 19:53:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:52,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:52,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:53:52,919 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:53:52,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:53:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:53,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:53:53,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 19:53:53,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:53:53,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726867881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:53,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:53:53,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 19:53:53,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366081495] [2022-11-16 19:53:53,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:53,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:53:53,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:53:53,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:53:53,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:53,363 INFO L87 Difference]: Start difference. First operand 6707 states and 10881 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:53:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:54,190 INFO L93 Difference]: Finished difference Result 16732 states and 26314 transitions. [2022-11-16 19:53:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:53:54,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-16 19:53:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:54,279 INFO L225 Difference]: With dead ends: 16732 [2022-11-16 19:53:54,279 INFO L226 Difference]: Without dead ends: 11671 [2022-11-16 19:53:54,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:54,307 INFO L413 NwaCegarLoop]: 3336 mSDtfsCounter, 3518 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:54,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3518 Valid, 3553 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:53:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11671 states. [2022-11-16 19:53:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11671 to 11635. [2022-11-16 19:53:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 10059 states have (on average 1.575405109851874) internal successors, (15847), 10094 states have internal predecessors, (15847), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2022-11-16 19:53:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 18225 transitions. [2022-11-16 19:53:54,836 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 18225 transitions. Word has length 130 [2022-11-16 19:53:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:54,837 INFO L495 AbstractCegarLoop]: Abstraction has 11635 states and 18225 transitions. [2022-11-16 19:53:54,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:53:54,838 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 18225 transitions. [2022-11-16 19:53:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 19:53:54,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:54,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:54,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:53:55,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 19:53:55,064 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:53:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:55,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2112561763, now seen corresponding path program 1 times [2022-11-16 19:53:55,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:53:55,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419868610] [2022-11-16 19:53:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:55,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:53:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 19:53:55,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:53:55,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419868610] [2022-11-16 19:53:55,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419868610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:53:55,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628523171] [2022-11-16 19:53:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:55,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:55,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:53:55,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:53:55,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:53:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:55,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:53:55,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 19:53:55,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:53:55,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628523171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:55,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:53:55,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 19:53:55,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056129069] [2022-11-16 19:53:55,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:55,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:53:55,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:53:55,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:53:55,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:55,596 INFO L87 Difference]: Start difference. First operand 11635 states and 18225 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:53:56,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:56,893 INFO L93 Difference]: Finished difference Result 31420 states and 48538 transitions. [2022-11-16 19:53:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:53:56,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-11-16 19:53:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:56,986 INFO L225 Difference]: With dead ends: 31420 [2022-11-16 19:53:56,986 INFO L226 Difference]: Without dead ends: 21431 [2022-11-16 19:53:57,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:57,024 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3503 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:57,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3503 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:53:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21431 states. [2022-11-16 19:53:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21431 to 21363. [2022-11-16 19:53:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21363 states, 18283 states have (on average 1.53361045780233) internal successors, (28039), 18350 states have internal predecessors, (28039), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2022-11-16 19:53:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21363 states to 21363 states and 32657 transitions. [2022-11-16 19:53:58,223 INFO L78 Accepts]: Start accepts. Automaton has 21363 states and 32657 transitions. Word has length 130 [2022-11-16 19:53:58,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:58,224 INFO L495 AbstractCegarLoop]: Abstraction has 21363 states and 32657 transitions. [2022-11-16 19:53:58,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:53:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 21363 states and 32657 transitions. [2022-11-16 19:53:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 19:53:58,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:58,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:58,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:53:58,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be4f5569-f357-4126-82dd-c0c9e0b6667a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 19:53:58,470 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:53:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:58,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1031739039, now seen corresponding path program 1 times [2022-11-16 19:53:58,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:53:58,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222104593] [2022-11-16 19:53:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:58,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:53:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 19:53:59,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:53:59,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222104593] [2022-11-16 19:53:59,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222104593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:59,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:53:59,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:53:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351620667] [2022-11-16 19:53:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:59,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:53:59,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:53:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:53:59,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:59,113 INFO L87 Difference]: Start difference. First operand 21363 states and 32657 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 19:54:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:02,535 INFO L93 Difference]: Finished difference Result 55355 states and 83479 transitions. [2022-11-16 19:54:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:54:02,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-11-16 19:54:02,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:02,743 INFO L225 Difference]: With dead ends: 55355 [2022-11-16 19:54:02,743 INFO L226 Difference]: Without dead ends: 35639 [2022-11-16 19:54:02,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:54:02,804 INFO L413 NwaCegarLoop]: 3328 mSDtfsCounter, 4173 mSDsluCounter, 6622 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4179 SdHoareTripleChecker+Valid, 9950 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:02,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4179 Valid, 9950 Invalid, 1083 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [137 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 19:54:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35639 states. [2022-11-16 19:54:04,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35639 to 30963. [2022-11-16 19:54:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30963 states, 26379 states have (on average 1.5154099852155123) internal successors, (39975), 26478 states have internal predecessors, (39975), 3430 states have call successors, (3430), 1153 states have call predecessors, (3430), 1152 states have return successors, (3428), 3332 states have call predecessors, (3428), 3428 states have call successors, (3428) [2022-11-16 19:54:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30963 states to 30963 states and 46833 transitions. [2022-11-16 19:54:04,756 INFO L78 Accepts]: Start accepts. Automaton has 30963 states and 46833 transitions. Word has length 130 [2022-11-16 19:54:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:04,757 INFO L495 AbstractCegarLoop]: Abstraction has 30963 states and 46833 transitions. [2022-11-16 19:54:04,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 19:54:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 30963 states and 46833 transitions. [2022-11-16 19:54:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-16 19:54:04,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:04,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:04,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 19:54:04,813 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:04,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:04,813 INFO L85 PathProgramCache]: Analyzing trace with hash 952733088, now seen corresponding path program 1 times [2022-11-16 19:54:04,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:04,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16022030] [2022-11-16 19:54:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:04,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 19:54:05,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:05,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16022030] [2022-11-16 19:54:05,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16022030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:05,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:05,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:54:05,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963031173] [2022-11-16 19:54:05,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:05,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:54:05,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:05,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:54:05,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:54:05,715 INFO L87 Difference]: Start difference. First operand 30963 states and 46833 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 19:54:10,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:10,702 INFO L93 Difference]: Finished difference Result 99579 states and 149272 transitions. [2022-11-16 19:54:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:54:10,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2022-11-16 19:54:10,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:11,037 INFO L225 Difference]: With dead ends: 99579 [2022-11-16 19:54:11,038 INFO L226 Difference]: Without dead ends: 70263 [2022-11-16 19:54:11,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:54:11,123 INFO L413 NwaCegarLoop]: 3306 mSDtfsCounter, 4174 mSDsluCounter, 9721 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4194 SdHoareTripleChecker+Valid, 13027 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:11,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4194 Valid, 13027 Invalid, 1360 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [151 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 19:54:11,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70263 states. [2022-11-16 19:54:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70263 to 59123. [2022-11-16 19:54:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59123 states, 50155 states have (on average 1.494387399062905) internal successors, (74951), 50350 states have internal predecessors, (74951), 6662 states have call successors, (6662), 2305 states have call predecessors, (6662), 2304 states have return successors, (6660), 6468 states have call predecessors, (6660), 6660 states have call successors, (6660) [2022-11-16 19:54:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59123 states to 59123 states and 88273 transitions. [2022-11-16 19:54:15,169 INFO L78 Accepts]: Start accepts. Automaton has 59123 states and 88273 transitions. Word has length 131 [2022-11-16 19:54:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:15,171 INFO L495 AbstractCegarLoop]: Abstraction has 59123 states and 88273 transitions. [2022-11-16 19:54:15,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 19:54:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 59123 states and 88273 transitions. [2022-11-16 19:54:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-16 19:54:15,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:15,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:15,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 19:54:15,254 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:15,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash -220946239, now seen corresponding path program 1 times [2022-11-16 19:54:15,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:15,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078362671] [2022-11-16 19:54:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:15,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 19:54:16,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:16,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078362671] [2022-11-16 19:54:16,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078362671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:16,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:16,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:54:16,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931169692] [2022-11-16 19:54:16,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:16,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:54:16,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:16,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:54:16,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:54:16,302 INFO L87 Difference]: Start difference. First operand 59123 states and 88273 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)