./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur --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 fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf --- 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-38b53e6 [2022-11-25 22:39:01,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:39:01,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:39:01,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:39:01,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:39:01,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:39:01,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:39:01,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:39:01,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:39:01,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:39:01,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:39:01,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:39:01,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:39:01,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:39:01,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:39:01,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:39:01,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:39:01,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:39:01,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:39:01,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:39:01,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:39:01,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:39:01,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:39:01,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:39:01,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:39:01,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:39:01,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:39:01,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:39:01,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:39:01,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:39:01,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:39:01,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:39:01,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:39:01,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:39:01,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:39:01,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:39:01,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:39:01,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:39:01,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:39:01,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:39:01,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:39:01,973 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:39:02,030 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:39:02,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:39:02,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:39:02,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:39:02,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:39:02,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:39:02,032 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:39:02,033 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:39:02,033 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:39:02,033 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:39:02,033 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:39:02,033 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:39:02,034 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:39:02,034 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:39:02,034 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:39:02,040 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:39:02,040 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:39:02,040 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:39:02,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:39:02,041 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:39:02,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:39:02,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:39:02,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:39:02,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:39:02,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:39:02,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:39:02,044 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:39:02,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:39:02,045 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:39:02,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:39:02,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:39:02,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:39:02,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:39:02,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:39:02,047 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:39:02,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:39:02,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:39:02,049 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:39:02,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:39:02,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:39:02,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:39:02,050 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_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf [2022-11-25 22:39:02,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:39:02,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:39:02,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:39:02,452 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:39:02,453 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:39:02,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/loop-simple/nested_4.c [2022-11-25 22:39:06,307 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:39:06,674 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:39:06,675 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/sv-benchmarks/c/loop-simple/nested_4.c [2022-11-25 22:39:06,682 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/data/0e3cae0df/997c4395f58e490c904c21f7fabda680/FLAG9903674e7 [2022-11-25 22:39:06,706 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/data/0e3cae0df/997c4395f58e490c904c21f7fabda680 [2022-11-25 22:39:06,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:39:06,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:39:06,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:39:06,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:39:06,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:39:06,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:39:06" (1/1) ... [2022-11-25 22:39:06,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43de8621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:06, skipping insertion in model container [2022-11-25 22:39:06,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:39:06" (1/1) ... [2022-11-25 22:39:06,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:39:06,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:39:06,990 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2022-11-25 22:39:06,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:39:07,014 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:39:07,041 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2022-11-25 22:39:07,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:39:07,057 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:39:07,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07 WrapperNode [2022-11-25 22:39:07,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:39:07,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:39:07,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:39:07,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:39:07,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07" (1/1) ... [2022-11-25 22:39:07,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07" (1/1) ... [2022-11-25 22:39:07,096 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50 [2022-11-25 22:39:07,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:39:07,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:39:07,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:39:07,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:39:07,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07" (1/1) ... [2022-11-25 22:39:07,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07" (1/1) ... [2022-11-25 22:39:07,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07" (1/1) ... [2022-11-25 22:39:07,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07" (1/1) ... [2022-11-25 22:39:07,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07" (1/1) ... [2022-11-25 22:39:07,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07" (1/1) ... [2022-11-25 22:39:07,120 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07" (1/1) ... [2022-11-25 22:39:07,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07" (1/1) ... [2022-11-25 22:39:07,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:39:07,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:39:07,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:39:07,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:39:07,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07" (1/1) ... [2022-11-25 22:39:07,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:39:07,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:39:07,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:39:07,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:39:07,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:39:07,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:39:07,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:39:07,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:39:07,317 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:39:07,319 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:39:07,548 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:39:07,607 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:39:07,607 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 22:39:07,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:39:07 BoogieIcfgContainer [2022-11-25 22:39:07,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:39:07,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:39:07,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:39:07,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:39:07,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:39:06" (1/3) ... [2022-11-25 22:39:07,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e679a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:39:07, skipping insertion in model container [2022-11-25 22:39:07,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:39:07" (2/3) ... [2022-11-25 22:39:07,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e679a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:39:07, skipping insertion in model container [2022-11-25 22:39:07,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:39:07" (3/3) ... [2022-11-25 22:39:07,631 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_4.c [2022-11-25 22:39:07,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:39:07,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:39:07,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:39:07,731 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;@4d34be83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:39:07,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:39:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:07,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 22:39:07,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:39:07,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 22:39:07,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:39:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:39:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2960648, now seen corresponding path program 1 times [2022-11-25 22:39:07,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:39:07,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108287075] [2022-11-25 22:39:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:07,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:39:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:39:07,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:39:07,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108287075] [2022-11-25 22:39:07,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108287075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:39:07,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:39:07,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:39:08,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376235086] [2022-11-25 22:39:08,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:39:08,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:39:08,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:39:08,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:39:08,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:39:08,047 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:39:08,106 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2022-11-25 22:39:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:39:08,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 22:39:08,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:39:08,118 INFO L225 Difference]: With dead ends: 19 [2022-11-25 22:39:08,119 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 22:39:08,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:39:08,126 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:39:08,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:39:08,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 22:39:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 9. [2022-11-25 22:39:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2022-11-25 22:39:08,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 4 [2022-11-25 22:39:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:39:08,184 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2022-11-25 22:39:08,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2022-11-25 22:39:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 22:39:08,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:39:08,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 22:39:08,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:39:08,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:39:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:39:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1506518357, now seen corresponding path program 1 times [2022-11-25 22:39:08,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:39:08,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026586645] [2022-11-25 22:39:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:39:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:39:08,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:39:08,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026586645] [2022-11-25 22:39:08,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026586645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:39:08,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:39:08,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:39:08,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873608619] [2022-11-25 22:39:08,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:39:08,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:39:08,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:39:08,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:39:08,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:39:08,374 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:39:08,438 INFO L93 Difference]: Finished difference Result 19 states and 28 transitions. [2022-11-25 22:39:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:39:08,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 22:39:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:39:08,439 INFO L225 Difference]: With dead ends: 19 [2022-11-25 22:39:08,439 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 22:39:08,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:39:08,458 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:39:08,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:39:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 22:39:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2022-11-25 22:39:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-25 22:39:08,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 6 [2022-11-25 22:39:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:39:08,463 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-25 22:39:08,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-25 22:39:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 22:39:08,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:39:08,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:39:08,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:39:08,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:39:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:39:08,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1875135773, now seen corresponding path program 1 times [2022-11-25 22:39:08,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:39:08,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593998938] [2022-11-25 22:39:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:08,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:39:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:39:08,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:39:08,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593998938] [2022-11-25 22:39:08,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593998938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:39:08,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:39:08,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:39:08,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289094234] [2022-11-25 22:39:08,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:39:08,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:39:08,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:39:08,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:39:08,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:39:08,545 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:39:08,575 INFO L93 Difference]: Finished difference Result 20 states and 28 transitions. [2022-11-25 22:39:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:39:08,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 22:39:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:39:08,577 INFO L225 Difference]: With dead ends: 20 [2022-11-25 22:39:08,577 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 22:39:08,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:39:08,580 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:39:08,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:39:08,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 22:39:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-25 22:39:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-11-25 22:39:08,586 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2022-11-25 22:39:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:39:08,587 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-11-25 22:39:08,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-11-25 22:39:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 22:39:08,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:39:08,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:39:08,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:39:08,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:39:08,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:39:08,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2119571304, now seen corresponding path program 1 times [2022-11-25 22:39:08,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:39:08,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304583724] [2022-11-25 22:39:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:08,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:39:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:39:08,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:39:08,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304583724] [2022-11-25 22:39:08,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304583724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:39:08,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:39:08,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:39:08,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473871860] [2022-11-25 22:39:08,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:39:08,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:39:08,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:39:08,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:39:08,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:39:08,656 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:08,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:39:08,680 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2022-11-25 22:39:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:39:08,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 22:39:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:39:08,682 INFO L225 Difference]: With dead ends: 21 [2022-11-25 22:39:08,682 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 22:39:08,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:39:08,684 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:39:08,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:39:08,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 22:39:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-25 22:39:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-25 22:39:08,690 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 10 [2022-11-25 22:39:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:39:08,691 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-25 22:39:08,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-25 22:39:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 22:39:08,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:39:08,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:39:08,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:39:08,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:39:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:39:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1565139754, now seen corresponding path program 1 times [2022-11-25 22:39:08,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:39:08,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362772603] [2022-11-25 22:39:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:08,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:39:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:39:08,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:39:08,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362772603] [2022-11-25 22:39:08,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362772603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:39:08,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924395756] [2022-11-25 22:39:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:08,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:39:08,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:39:08,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:39:08,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:39:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:08,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:39:08,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:39:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:39:08,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:39:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:39:08,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924395756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:39:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1532103853] [2022-11-25 22:39:09,007 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:39:09,009 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:39:09,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:39:09,021 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:39:09,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:39:10,098 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:39:10,406 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '288#(and (<= 6 |ULTIMATE.start_main_~b~0#1|) (<= 6 |ULTIMATE.start_main_~a~0#1|) (<= 6 |ULTIMATE.start_main_~d~0#1|) (or (not (= 6 |ULTIMATE.start_main_~a~0#1|)) (not (= 6 |ULTIMATE.start_main_~d~0#1|)) (not (= 6 |ULTIMATE.start_main_~c~0#1|)) (not (= 6 |ULTIMATE.start_main_~b~0#1|))) (<= 6 |ULTIMATE.start_main_~c~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:39:10,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:39:10,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:39:10,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 22:39:10,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615287622] [2022-11-25 22:39:10,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:39:10,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:39:10,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:39:10,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:39:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:39:10,410 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:39:10,466 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2022-11-25 22:39:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:39:10,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 22:39:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:39:10,469 INFO L225 Difference]: With dead ends: 25 [2022-11-25 22:39:10,470 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 22:39:10,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:39:10,472 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:39:10,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:39:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 22:39:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-25 22:39:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-25 22:39:10,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2022-11-25 22:39:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:39:10,478 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-25 22:39:10,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-25 22:39:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 22:39:10,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:39:10,480 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:39:10,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:39:10,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:39:10,688 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:39:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:39:10,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1596196888, now seen corresponding path program 2 times [2022-11-25 22:39:10,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:39:10,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397938874] [2022-11-25 22:39:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:10,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:39:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:39:10,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:39:10,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397938874] [2022-11-25 22:39:10,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397938874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:39:10,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845663999] [2022-11-25 22:39:10,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:39:10,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:39:10,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:39:10,762 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:39:10,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:39:10,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:39:10,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:39:10,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:39:10,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:39:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:39:10,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:39:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:39:10,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845663999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:39:10,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239303971] [2022-11-25 22:39:10,940 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:39:10,940 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:39:10,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:39:10,941 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:39:10,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:39:11,488 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:39:11,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '449#(and (<= 6 |ULTIMATE.start_main_~b~0#1|) (<= 6 |ULTIMATE.start_main_~a~0#1|) (<= 6 |ULTIMATE.start_main_~d~0#1|) (or (not (= 6 |ULTIMATE.start_main_~a~0#1|)) (not (= 6 |ULTIMATE.start_main_~d~0#1|)) (not (= 6 |ULTIMATE.start_main_~c~0#1|)) (not (= 6 |ULTIMATE.start_main_~b~0#1|))) (<= 6 |ULTIMATE.start_main_~c~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:39:11,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:39:11,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:39:11,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-25 22:39:11,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623418111] [2022-11-25 22:39:11,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:39:11,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:39:11,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:39:11,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:39:11,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:39:11,780 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:39:12,036 INFO L93 Difference]: Finished difference Result 102 states and 132 transitions. [2022-11-25 22:39:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 22:39:12,037 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 22:39:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:39:12,040 INFO L225 Difference]: With dead ends: 102 [2022-11-25 22:39:12,042 INFO L226 Difference]: Without dead ends: 89 [2022-11-25 22:39:12,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-11-25 22:39:12,045 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:39:12,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 9 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:39:12,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-25 22:39:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 69. [2022-11-25 22:39:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.25) internal successors, (85), 68 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2022-11-25 22:39:12,063 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 14 [2022-11-25 22:39:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:39:12,064 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2022-11-25 22:39:12,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2022-11-25 22:39:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 22:39:12,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:39:12,067 INFO L195 NwaCegarLoop]: trace histogram [32, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-25 22:39:12,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:39:12,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:39:12,274 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:39:12,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:39:12,275 INFO L85 PathProgramCache]: Analyzing trace with hash -983170276, now seen corresponding path program 3 times [2022-11-25 22:39:12,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:39:12,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294774754] [2022-11-25 22:39:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:12,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:39:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 343 proven. 1 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2022-11-25 22:39:12,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:39:12,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294774754] [2022-11-25 22:39:12,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294774754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:39:12,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829907848] [2022-11-25 22:39:12,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:39:12,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:39:12,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:39:12,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:39:12,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:39:12,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:39:12,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:39:12,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 22:39:12,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:39:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 197 proven. 10 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-11-25 22:39:12,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:39:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 197 proven. 10 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-11-25 22:39:12,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829907848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:39:12,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [927077231] [2022-11-25 22:39:12,810 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:39:12,811 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:39:12,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:39:12,811 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:39:12,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:39:13,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:39:13,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1214#(and (<= 6 |ULTIMATE.start_main_~b~0#1|) (<= 6 |ULTIMATE.start_main_~a~0#1|) (<= 6 |ULTIMATE.start_main_~d~0#1|) (or (not (= 6 |ULTIMATE.start_main_~a~0#1|)) (not (= 6 |ULTIMATE.start_main_~d~0#1|)) (not (= 6 |ULTIMATE.start_main_~c~0#1|)) (not (= 6 |ULTIMATE.start_main_~b~0#1|))) (<= 6 |ULTIMATE.start_main_~c~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:39:13,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:39:13,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:39:13,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2022-11-25 22:39:13,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665047608] [2022-11-25 22:39:13,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:39:13,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 22:39:13,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:39:13,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 22:39:13,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-25 22:39:13,584 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:39:13,867 INFO L93 Difference]: Finished difference Result 291 states and 399 transitions. [2022-11-25 22:39:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 22:39:13,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-25 22:39:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:39:13,870 INFO L225 Difference]: With dead ends: 291 [2022-11-25 22:39:13,870 INFO L226 Difference]: Without dead ends: 225 [2022-11-25 22:39:13,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 188 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-11-25 22:39:13,872 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:39:13,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 12 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:39:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-25 22:39:13,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 157. [2022-11-25 22:39:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.185897435897436) internal successors, (185), 156 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2022-11-25 22:39:13,908 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 68 [2022-11-25 22:39:13,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:39:13,908 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2022-11-25 22:39:13,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2022-11-25 22:39:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-25 22:39:13,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:39:13,914 INFO L195 NwaCegarLoop]: trace histogram [96, 16, 16, 8, 8, 4, 4, 1, 1, 1, 1] [2022-11-25 22:39:13,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 22:39:14,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:39:14,122 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:39:14,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:39:14,122 INFO L85 PathProgramCache]: Analyzing trace with hash 402676516, now seen corresponding path program 4 times [2022-11-25 22:39:14,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:39:14,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663567644] [2022-11-25 22:39:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:14,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:39:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 1450 proven. 52 refuted. 0 times theorem prover too weak. 5066 trivial. 0 not checked. [2022-11-25 22:39:14,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:39:14,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663567644] [2022-11-25 22:39:14,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663567644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:39:14,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000932598] [2022-11-25 22:39:14,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:39:14,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:39:14,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:39:14,521 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:39:14,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:39:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:14,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:39:14,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:39:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 1450 proven. 52 refuted. 0 times theorem prover too weak. 5066 trivial. 0 not checked. [2022-11-25 22:39:14,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:39:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 1450 proven. 52 refuted. 0 times theorem prover too weak. 5066 trivial. 0 not checked. [2022-11-25 22:39:14,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000932598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:39:14,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969931690] [2022-11-25 22:39:14,866 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:39:14,866 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:39:14,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:39:14,868 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:39:14,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:39:15,560 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:39:15,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3068#(and (<= 6 |ULTIMATE.start_main_~b~0#1|) (<= 6 |ULTIMATE.start_main_~a~0#1|) (<= 6 |ULTIMATE.start_main_~d~0#1|) (or (not (= 6 |ULTIMATE.start_main_~a~0#1|)) (not (= 6 |ULTIMATE.start_main_~d~0#1|)) (not (= 6 |ULTIMATE.start_main_~c~0#1|)) (not (= 6 |ULTIMATE.start_main_~b~0#1|))) (<= 6 |ULTIMATE.start_main_~c~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:39:15,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:39:15,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:39:15,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 22:39:15,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525310524] [2022-11-25 22:39:15,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:39:15,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:39:15,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:39:15,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:39:15,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-25 22:39:15,953 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:39:16,059 INFO L93 Difference]: Finished difference Result 550 states and 667 transitions. [2022-11-25 22:39:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:39:16,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-11-25 22:39:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:39:16,064 INFO L225 Difference]: With dead ends: 550 [2022-11-25 22:39:16,065 INFO L226 Difference]: Without dead ends: 413 [2022-11-25 22:39:16,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-25 22:39:16,072 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:39:16,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:39:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-11-25 22:39:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2022-11-25 22:39:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.1480582524271845) internal successors, (473), 412 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 473 transitions. [2022-11-25 22:39:16,156 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 473 transitions. Word has length 156 [2022-11-25 22:39:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:39:16,158 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 473 transitions. [2022-11-25 22:39:16,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 473 transitions. [2022-11-25 22:39:16,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-11-25 22:39:16,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:39:16,174 INFO L195 NwaCegarLoop]: trace histogram [288, 48, 48, 8, 8, 4, 4, 1, 1, 1, 1] [2022-11-25 22:39:16,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:39:16,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 22:39:16,375 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:39:16,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:39:16,376 INFO L85 PathProgramCache]: Analyzing trace with hash -667160124, now seen corresponding path program 5 times [2022-11-25 22:39:16,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:39:16,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753354476] [2022-11-25 22:39:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:16,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:39:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 57896 backedges. 21787 proven. 1816 refuted. 0 times theorem prover too weak. 34293 trivial. 0 not checked. [2022-11-25 22:39:17,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:39:17,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753354476] [2022-11-25 22:39:17,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753354476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:39:17,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894315844] [2022-11-25 22:39:17,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:39:17,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:39:17,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:39:17,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:39:17,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:39:17,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 103 check-sat command(s) [2022-11-25 22:39:17,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:39:17,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:39:17,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:39:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 57896 backedges. 21787 proven. 1816 refuted. 0 times theorem prover too weak. 34293 trivial. 0 not checked. [2022-11-25 22:39:17,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:39:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 57896 backedges. 21787 proven. 1816 refuted. 0 times theorem prover too weak. 34293 trivial. 0 not checked. [2022-11-25 22:39:17,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894315844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:39:17,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402565356] [2022-11-25 22:39:17,967 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:39:17,967 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:39:17,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:39:17,968 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:39:17,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:39:18,337 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:39:18,657 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7464#(and (<= 6 |ULTIMATE.start_main_~b~0#1|) (<= 6 |ULTIMATE.start_main_~a~0#1|) (<= 6 |ULTIMATE.start_main_~d~0#1|) (or (not (= 6 |ULTIMATE.start_main_~a~0#1|)) (not (= 6 |ULTIMATE.start_main_~d~0#1|)) (not (= 6 |ULTIMATE.start_main_~c~0#1|)) (not (= 6 |ULTIMATE.start_main_~b~0#1|))) (<= 6 |ULTIMATE.start_main_~c~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:39:18,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:39:18,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:39:18,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 22:39:18,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734283238] [2022-11-25 22:39:18,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:39:18,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:39:18,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:39:18,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:39:18,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-25 22:39:18,662 INFO L87 Difference]: Start difference. First operand 413 states and 473 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:39:18,991 INFO L93 Difference]: Finished difference Result 1523 states and 1756 transitions. [2022-11-25 22:39:18,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:39:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 412 [2022-11-25 22:39:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:39:19,000 INFO L225 Difference]: With dead ends: 1523 [2022-11-25 22:39:19,000 INFO L226 Difference]: Without dead ends: 1213 [2022-11-25 22:39:19,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1239 GetRequests, 1226 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-25 22:39:19,006 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:39:19,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 11 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:39:19,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-11-25 22:39:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1213. [2022-11-25 22:39:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 1.1427392739273927) internal successors, (1385), 1212 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1385 transitions. [2022-11-25 22:39:19,223 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1385 transitions. Word has length 412 [2022-11-25 22:39:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:39:19,225 INFO L495 AbstractCegarLoop]: Abstraction has 1213 states and 1385 transitions. [2022-11-25 22:39:19,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:39:19,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1385 transitions. [2022-11-25 22:39:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2022-11-25 22:39:19,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:39:19,302 INFO L195 NwaCegarLoop]: trace histogram [864, 144, 144, 24, 24, 4, 4, 1, 1, 1, 1] [2022-11-25 22:39:19,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:39:19,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:39:19,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:39:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:39:19,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1773815588, now seen corresponding path program 6 times [2022-11-25 22:39:19,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:39:19,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797927105] [2022-11-25 22:39:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:19,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:39:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 521944 backedges. 0 proven. 391912 refuted. 0 times theorem prover too weak. 130032 trivial. 0 not checked. [2022-11-25 22:39:24,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:39:24,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797927105] [2022-11-25 22:39:24,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797927105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:39:24,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798750817] [2022-11-25 22:39:24,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:39:24,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:39:24,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:39:24,351 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:39:24,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:39:25,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:39:25,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:39:25,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 3629 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 22:39:25,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:39:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 521944 backedges. 195955 proven. 27993 refuted. 0 times theorem prover too weak. 297996 trivial. 0 not checked. [2022-11-25 22:39:27,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:39:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 521944 backedges. 195955 proven. 27993 refuted. 0 times theorem prover too weak. 297996 trivial. 0 not checked. [2022-11-25 22:39:33,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798750817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:39:33,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234516891] [2022-11-25 22:39:33,660 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:39:33,660 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:39:33,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:39:33,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:39:33,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:39:34,063 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:39:34,464 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20249#(and (<= 6 |ULTIMATE.start_main_~b~0#1|) (<= 6 |ULTIMATE.start_main_~a~0#1|) (<= 6 |ULTIMATE.start_main_~d~0#1|) (or (not (= 6 |ULTIMATE.start_main_~a~0#1|)) (not (= 6 |ULTIMATE.start_main_~d~0#1|)) (not (= 6 |ULTIMATE.start_main_~c~0#1|)) (not (= 6 |ULTIMATE.start_main_~b~0#1|))) (<= 6 |ULTIMATE.start_main_~c~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:39:34,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:39:34,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:39:34,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 25, 25] total 52 [2022-11-25 22:39:34,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65147163] [2022-11-25 22:39:34,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:39:34,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-25 22:39:34,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:39:34,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-25 22:39:34,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=2568, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 22:39:34,476 INFO L87 Difference]: Start difference. First operand 1213 states and 1385 transitions. Second operand has 52 states, 52 states have (on average 2.826923076923077) internal successors, (147), 52 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:04,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:44:04,493 INFO L93 Difference]: Finished difference Result 1818 states and 2078 transitions. [2022-11-25 22:44:04,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1816 states. [2022-11-25 22:44:04,494 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.826923076923077) internal successors, (147), 52 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1212 [2022-11-25 22:44:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:44:04,498 INFO L225 Difference]: With dead ends: 1818 [2022-11-25 22:44:04,498 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 22:44:04,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5443 GetRequests, 3583 SyntacticMatches, 1 SemanticMatches, 1859 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630873 ImplicationChecksByTransitivity, 266.9s TimeCoverageRelationStatistics Valid=340200, Invalid=3121260, Unknown=0, NotChecked=0, Total=3461460 [2022-11-25 22:44:04,767 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 351 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:44:04,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 0 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 22:44:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 22:44:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 22:44:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 22:44:04,769 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1212 [2022-11-25 22:44:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:44:04,769 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 22:44:04,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.826923076923077) internal successors, (147), 52 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:44:04,770 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 22:44:04,770 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 22:44:04,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 22:44:04,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:44:04,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa53ace9-c4e7-4aee-bc17-ef50f8f50e5d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:44:04,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.