./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/kundu2.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/kundu2.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta --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 87760fc84dfa44e1b5109b35af0fae7e5f68f814afbb1ba90e7b46e4e9e3b4bf --- 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-dbf71c6-m [2022-10-17 17:23:53,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:23:53,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:23:53,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:23:53,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:23:53,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:23:53,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:23:53,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:23:53,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:23:53,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:23:53,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:23:53,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:23:53,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:23:53,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:23:53,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:23:53,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:23:53,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:23:53,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:23:53,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:23:53,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:23:53,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:23:53,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:23:53,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:23:53,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:23:53,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:23:53,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:23:53,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:23:53,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:23:53,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:23:53,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:23:53,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:23:53,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:23:53,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:23:53,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:23:53,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:23:53,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:23:53,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:23:53,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:23:53,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:23:53,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:23:53,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:23:53,869 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:23:53,900 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:23:53,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:23:53,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:23:53,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:23:53,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:23:53,902 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:23:53,902 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:23:53,902 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:23:53,902 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:23:53,902 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:23:53,903 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:23:53,903 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:23:53,903 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:23:53,903 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:23:53,903 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:23:53,904 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:23:53,904 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:23:53,904 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:23:53,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:23:53,905 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:23:53,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:23:53,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:23:53,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:23:53,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:23:53,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:23:53,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:23:53,907 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:23:53,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:23:53,907 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:23:53,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:23:53,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:23:53,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:23:53,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:53,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:23:53,913 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:23:53,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:23:53,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:23:53,913 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:23:53,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:23:53,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:23:53,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:23:53,914 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_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87760fc84dfa44e1b5109b35af0fae7e5f68f814afbb1ba90e7b46e4e9e3b4bf [2022-10-17 17:23:54,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:23:54,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:23:54,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:23:54,223 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:23:54,224 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:23:54,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/systemc/kundu2.cil.c [2022-10-17 17:23:54,304 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/data/5fa6c7208/f63e3058a27f4b6ca0b1374f3bec1e99/FLAG4255ef69d [2022-10-17 17:23:54,888 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:23:54,893 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/sv-benchmarks/c/systemc/kundu2.cil.c [2022-10-17 17:23:54,916 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/data/5fa6c7208/f63e3058a27f4b6ca0b1374f3bec1e99/FLAG4255ef69d [2022-10-17 17:23:55,203 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/data/5fa6c7208/f63e3058a27f4b6ca0b1374f3bec1e99 [2022-10-17 17:23:55,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:23:55,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:23:55,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:55,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:23:55,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:23:55,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36be4d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55, skipping insertion in model container [2022-10-17 17:23:55,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:23:55,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:23:55,510 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/sv-benchmarks/c/systemc/kundu2.cil.c[636,649] [2022-10-17 17:23:55,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:55,586 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:23:55,598 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/sv-benchmarks/c/systemc/kundu2.cil.c[636,649] [2022-10-17 17:23:55,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:55,643 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:23:55,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55 WrapperNode [2022-10-17 17:23:55,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:55,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:55,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:23:55,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:23:55,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,695 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 310 [2022-10-17 17:23:55,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:55,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:23:55,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:23:55,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:23:55,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,742 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:23:55,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:23:55,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:23:55,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:23:55,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55" (1/1) ... [2022-10-17 17:23:55,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:55,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:55,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:23:55,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:23:55,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:23:55,827 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2022-10-17 17:23:55,827 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2022-10-17 17:23:55,828 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-10-17 17:23:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-10-17 17:23:55,828 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-10-17 17:23:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-10-17 17:23:55,828 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-10-17 17:23:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-10-17 17:23:55,828 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-10-17 17:23:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-10-17 17:23:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-10-17 17:23:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-10-17 17:23:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:23:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-10-17 17:23:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-10-17 17:23:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:23:55,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:23:55,910 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:23:55,913 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:23:56,318 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:23:56,584 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:23:56,584 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-17 17:23:56,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:56 BoogieIcfgContainer [2022-10-17 17:23:56,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:23:56,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:23:56,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:23:56,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:23:56,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:23:55" (1/3) ... [2022-10-17 17:23:56,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a08a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:56, skipping insertion in model container [2022-10-17 17:23:56,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:55" (2/3) ... [2022-10-17 17:23:56,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a08a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:56, skipping insertion in model container [2022-10-17 17:23:56,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:56" (3/3) ... [2022-10-17 17:23:56,613 INFO L112 eAbstractionObserver]: Analyzing ICFG kundu2.cil.c [2022-10-17 17:23:56,635 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:23:56,635 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:23:56,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:23:56,743 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;@799a9ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:23:56,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:23:56,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-10-17 17:23:56,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-17 17:23:56,760 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:56,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:56,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:56,767 INFO L85 PathProgramCache]: Analyzing trace with hash -122069048, now seen corresponding path program 1 times [2022-10-17 17:23:56,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:56,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479255114] [2022-10-17 17:23:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:56,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:57,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:57,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479255114] [2022-10-17 17:23:57,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479255114] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:57,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:57,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:23:57,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026140287] [2022-10-17 17:23:57,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:57,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:23:57,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:57,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:23:57,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:23:57,241 INFO L87 Difference]: Start difference. First operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:23:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:57,617 INFO L93 Difference]: Finished difference Result 263 states and 388 transitions. [2022-10-17 17:23:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:23:57,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-10-17 17:23:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:57,637 INFO L225 Difference]: With dead ends: 263 [2022-10-17 17:23:57,638 INFO L226 Difference]: Without dead ends: 171 [2022-10-17 17:23:57,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:23:57,646 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 226 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:57,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 348 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:23:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-10-17 17:23:57,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2022-10-17 17:23:57,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.4390243902439024) internal successors, (177), 127 states have internal predecessors, (177), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-10-17 17:23:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 232 transitions. [2022-10-17 17:23:57,710 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 232 transitions. Word has length 39 [2022-10-17 17:23:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:57,711 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 232 transitions. [2022-10-17 17:23:57,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:23:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 232 transitions. [2022-10-17 17:23:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-17 17:23:57,714 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:57,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:57,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:23:57,715 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:57,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1093743735, now seen corresponding path program 1 times [2022-10-17 17:23:57,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:57,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324265539] [2022-10-17 17:23:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:57,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:57,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:57,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324265539] [2022-10-17 17:23:57,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324265539] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:57,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:57,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:23:57,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180223749] [2022-10-17 17:23:57,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:57,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:23:57,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:57,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:23:57,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:23:57,815 INFO L87 Difference]: Start difference. First operand 165 states and 232 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:23:58,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:58,038 INFO L93 Difference]: Finished difference Result 480 states and 677 transitions. [2022-10-17 17:23:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:23:58,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-10-17 17:23:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:58,044 INFO L225 Difference]: With dead ends: 480 [2022-10-17 17:23:58,044 INFO L226 Difference]: Without dead ends: 320 [2022-10-17 17:23:58,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:23:58,048 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 221 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:58,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 320 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:23:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-10-17 17:23:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 301. [2022-10-17 17:23:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 225 states have (on average 1.3911111111111112) internal successors, (313), 230 states have internal predecessors, (313), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2022-10-17 17:23:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 412 transitions. [2022-10-17 17:23:58,091 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 412 transitions. Word has length 39 [2022-10-17 17:23:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:58,092 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 412 transitions. [2022-10-17 17:23:58,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:23:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 412 transitions. [2022-10-17 17:23:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 17:23:58,094 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:58,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:58,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:23:58,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:58,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1806477916, now seen corresponding path program 1 times [2022-10-17 17:23:58,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:58,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088418606] [2022-10-17 17:23:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:58,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:58,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:58,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088418606] [2022-10-17 17:23:58,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088418606] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:58,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:58,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:23:58,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049178708] [2022-10-17 17:23:58,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:58,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:58,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:58,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:58,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:58,318 INFO L87 Difference]: Start difference. First operand 301 states and 412 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-17 17:23:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:58,514 INFO L93 Difference]: Finished difference Result 801 states and 1098 transitions. [2022-10-17 17:23:58,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:23:58,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 40 [2022-10-17 17:23:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:58,524 INFO L225 Difference]: With dead ends: 801 [2022-10-17 17:23:58,524 INFO L226 Difference]: Without dead ends: 506 [2022-10-17 17:23:58,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:23:58,532 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 90 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:58,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 433 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-10-17 17:23:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 491. [2022-10-17 17:23:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 367 states have (on average 1.3814713896457766) internal successors, (507), 378 states have internal predecessors, (507), 81 states have call successors, (81), 43 states have call predecessors, (81), 42 states have return successors, (78), 70 states have call predecessors, (78), 78 states have call successors, (78) [2022-10-17 17:23:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 666 transitions. [2022-10-17 17:23:58,607 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 666 transitions. Word has length 40 [2022-10-17 17:23:58,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:58,607 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 666 transitions. [2022-10-17 17:23:58,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-17 17:23:58,608 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 666 transitions. [2022-10-17 17:23:58,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-17 17:23:58,610 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:58,610 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:58,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:23:58,610 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:58,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:58,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1512041001, now seen corresponding path program 1 times [2022-10-17 17:23:58,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:58,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256318674] [2022-10-17 17:23:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:58,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:58,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:58,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256318674] [2022-10-17 17:23:58,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256318674] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:58,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:58,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:23:58,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750057415] [2022-10-17 17:23:58,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:58,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:23:58,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:58,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:23:58,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:23:58,806 INFO L87 Difference]: Start difference. First operand 491 states and 666 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 17:23:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:59,192 INFO L93 Difference]: Finished difference Result 1355 states and 1854 transitions. [2022-10-17 17:23:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:23:59,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2022-10-17 17:23:59,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:59,201 INFO L225 Difference]: With dead ends: 1355 [2022-10-17 17:23:59,201 INFO L226 Difference]: Without dead ends: 931 [2022-10-17 17:23:59,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:23:59,204 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 197 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:59,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 766 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:23:59,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-10-17 17:23:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 905. [2022-10-17 17:23:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 682 states have (on average 1.3768328445747802) internal successors, (939), 700 states have internal predecessors, (939), 144 states have call successors, (144), 79 states have call predecessors, (144), 78 states have return successors, (141), 126 states have call predecessors, (141), 141 states have call successors, (141) [2022-10-17 17:23:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1224 transitions. [2022-10-17 17:23:59,335 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1224 transitions. Word has length 50 [2022-10-17 17:23:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:59,338 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1224 transitions. [2022-10-17 17:23:59,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 17:23:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1224 transitions. [2022-10-17 17:23:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-10-17 17:23:59,346 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:59,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:59,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:23:59,349 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:59,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1031429756, now seen corresponding path program 1 times [2022-10-17 17:23:59,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:59,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426130884] [2022-10-17 17:23:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:59,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:59,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:59,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426130884] [2022-10-17 17:23:59,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426130884] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:59,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:59,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:23:59,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375243541] [2022-10-17 17:23:59,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:59,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:23:59,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:59,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:23:59,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:23:59,608 INFO L87 Difference]: Start difference. First operand 905 states and 1224 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:24:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:00,070 INFO L93 Difference]: Finished difference Result 2804 states and 3798 transitions. [2022-10-17 17:24:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:24:00,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-10-17 17:24:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:00,093 INFO L225 Difference]: With dead ends: 2804 [2022-10-17 17:24:00,093 INFO L226 Difference]: Without dead ends: 1905 [2022-10-17 17:24:00,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:24:00,099 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 340 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:00,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 270 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:24:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2022-10-17 17:24:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1677. [2022-10-17 17:24:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1271 states have (on average 1.3634933123524784) internal successors, (1733), 1292 states have internal predecessors, (1733), 255 states have call successors, (255), 151 states have call predecessors, (255), 150 states have return successors, (252), 234 states have call predecessors, (252), 252 states have call successors, (252) [2022-10-17 17:24:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2240 transitions. [2022-10-17 17:24:00,322 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2240 transitions. Word has length 54 [2022-10-17 17:24:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:00,322 INFO L495 AbstractCegarLoop]: Abstraction has 1677 states and 2240 transitions. [2022-10-17 17:24:00,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:24:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2240 transitions. [2022-10-17 17:24:00,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-10-17 17:24:00,325 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:00,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:00,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:24:00,326 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:24:00,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:00,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1333824375, now seen corresponding path program 1 times [2022-10-17 17:24:00,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:00,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512102946] [2022-10-17 17:24:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:00,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:24:00,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:00,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512102946] [2022-10-17 17:24:00,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512102946] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:00,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:00,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:24:00,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104186771] [2022-10-17 17:24:00,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:00,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:24:00,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:00,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:24:00,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:24:00,524 INFO L87 Difference]: Start difference. First operand 1677 states and 2240 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 17:24:01,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:01,132 INFO L93 Difference]: Finished difference Result 3769 states and 5161 transitions. [2022-10-17 17:24:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:24:01,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-10-17 17:24:01,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:01,154 INFO L225 Difference]: With dead ends: 3769 [2022-10-17 17:24:01,154 INFO L226 Difference]: Without dead ends: 2707 [2022-10-17 17:24:01,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:24:01,159 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 340 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:01,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 766 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:24:01,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2022-10-17 17:24:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 2177. [2022-10-17 17:24:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 1657 states have (on average 1.368135184067592) internal successors, (2267), 1679 states have internal predecessors, (2267), 326 states have call successors, (326), 194 states have call predecessors, (326), 193 states have return successors, (323), 304 states have call predecessors, (323), 323 states have call successors, (323) [2022-10-17 17:24:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 2916 transitions. [2022-10-17 17:24:01,421 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 2916 transitions. Word has length 55 [2022-10-17 17:24:01,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:01,422 INFO L495 AbstractCegarLoop]: Abstraction has 2177 states and 2916 transitions. [2022-10-17 17:24:01,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 17:24:01,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 2916 transitions. [2022-10-17 17:24:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-10-17 17:24:01,424 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:01,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:01,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:24:01,424 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:24:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:01,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1244810678, now seen corresponding path program 1 times [2022-10-17 17:24:01,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:01,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530148696] [2022-10-17 17:24:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:01,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:24:01,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:01,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530148696] [2022-10-17 17:24:01,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530148696] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:01,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:01,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:24:01,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841474879] [2022-10-17 17:24:01,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:01,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:24:01,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:01,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:24:01,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:24:01,596 INFO L87 Difference]: Start difference. First operand 2177 states and 2916 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:24:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:02,295 INFO L93 Difference]: Finished difference Result 6714 states and 9032 transitions. [2022-10-17 17:24:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:24:02,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2022-10-17 17:24:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:02,327 INFO L225 Difference]: With dead ends: 6714 [2022-10-17 17:24:02,327 INFO L226 Difference]: Without dead ends: 4543 [2022-10-17 17:24:02,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:24:02,334 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 335 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:02,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 364 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:24:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2022-10-17 17:24:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 4170. [2022-10-17 17:24:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4170 states, 3169 states have (on average 1.3502682234143264) internal successors, (4279), 3197 states have internal predecessors, (4279), 622 states have call successors, (622), 379 states have call predecessors, (622), 378 states have return successors, (619), 594 states have call predecessors, (619), 619 states have call successors, (619) [2022-10-17 17:24:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4170 states to 4170 states and 5520 transitions. [2022-10-17 17:24:02,781 INFO L78 Accepts]: Start accepts. Automaton has 4170 states and 5520 transitions. Word has length 57 [2022-10-17 17:24:02,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:02,782 INFO L495 AbstractCegarLoop]: Abstraction has 4170 states and 5520 transitions. [2022-10-17 17:24:02,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:24:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states and 5520 transitions. [2022-10-17 17:24:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-10-17 17:24:02,785 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:02,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:02,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:24:02,786 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:24:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:02,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1580588632, now seen corresponding path program 1 times [2022-10-17 17:24:02,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:02,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131750930] [2022-10-17 17:24:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:02,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:24:02,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:02,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131750930] [2022-10-17 17:24:02,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131750930] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:02,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:02,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:24:02,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343541434] [2022-10-17 17:24:02,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:02,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:02,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:02,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:02,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:24:02,881 INFO L87 Difference]: Start difference. First operand 4170 states and 5520 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:24:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:03,504 INFO L93 Difference]: Finished difference Result 11026 states and 14612 transitions. [2022-10-17 17:24:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:24:03,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2022-10-17 17:24:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:03,588 INFO L225 Difference]: With dead ends: 11026 [2022-10-17 17:24:03,589 INFO L226 Difference]: Without dead ends: 6862 [2022-10-17 17:24:03,600 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 [2022-10-17 17:24:03,604 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 63 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:03,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 270 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:24:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6862 states. [2022-10-17 17:24:04,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6862 to 5293. [2022-10-17 17:24:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5293 states, 4061 states have (on average 1.3545924649101206) internal successors, (5501), 4115 states have internal predecessors, (5501), 745 states have call successors, (745), 487 states have call predecessors, (745), 486 states have return successors, (742), 691 states have call predecessors, (742), 742 states have call successors, (742) [2022-10-17 17:24:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 6988 transitions. [2022-10-17 17:24:04,141 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 6988 transitions. Word has length 59 [2022-10-17 17:24:04,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:04,142 INFO L495 AbstractCegarLoop]: Abstraction has 5293 states and 6988 transitions. [2022-10-17 17:24:04,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:24:04,142 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 6988 transitions. [2022-10-17 17:24:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-10-17 17:24:04,147 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:04,147 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:04,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:24:04,148 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:24:04,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:04,148 INFO L85 PathProgramCache]: Analyzing trace with hash -112529311, now seen corresponding path program 1 times [2022-10-17 17:24:04,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:04,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648957741] [2022-10-17 17:24:04,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:04,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:24:04,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:04,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648957741] [2022-10-17 17:24:04,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648957741] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:04,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:04,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:24:04,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528828836] [2022-10-17 17:24:04,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:04,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:24:04,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:24:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:24:04,255 INFO L87 Difference]: Start difference. First operand 5293 states and 6988 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:24:05,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:05,114 INFO L93 Difference]: Finished difference Result 10425 states and 13868 transitions. [2022-10-17 17:24:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:24:05,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2022-10-17 17:24:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:05,157 INFO L225 Difference]: With dead ends: 10425 [2022-10-17 17:24:05,157 INFO L226 Difference]: Without dead ends: 6650 [2022-10-17 17:24:05,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:24:05,169 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 300 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:05,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 388 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:24:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6650 states. [2022-10-17 17:24:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6650 to 6553. [2022-10-17 17:24:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6553 states, 5053 states have (on average 1.3554324163863052) internal successors, (6849), 5109 states have internal predecessors, (6849), 907 states have call successors, (907), 593 states have call predecessors, (907), 592 states have return successors, (904), 851 states have call predecessors, (904), 904 states have call successors, (904) [2022-10-17 17:24:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6553 states to 6553 states and 8660 transitions. [2022-10-17 17:24:05,821 INFO L78 Accepts]: Start accepts. Automaton has 6553 states and 8660 transitions. Word has length 63 [2022-10-17 17:24:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:05,822 INFO L495 AbstractCegarLoop]: Abstraction has 6553 states and 8660 transitions. [2022-10-17 17:24:05,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:24:05,822 INFO L276 IsEmpty]: Start isEmpty. Operand 6553 states and 8660 transitions. [2022-10-17 17:24:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-17 17:24:05,826 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:05,827 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:05,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 17:24:05,827 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:24:05,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1982299313, now seen corresponding path program 1 times [2022-10-17 17:24:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:05,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022087471] [2022-10-17 17:24:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:24:05,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:05,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022087471] [2022-10-17 17:24:05,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022087471] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:05,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:05,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:24:05,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975172456] [2022-10-17 17:24:05,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:05,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:24:05,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:05,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:24:05,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:24:05,988 INFO L87 Difference]: Start difference. First operand 6553 states and 8660 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:24:07,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:07,730 INFO L93 Difference]: Finished difference Result 17413 states and 23670 transitions. [2022-10-17 17:24:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:24:07,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-10-17 17:24:07,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:07,819 INFO L225 Difference]: With dead ends: 17413 [2022-10-17 17:24:07,820 INFO L226 Difference]: Without dead ends: 12378 [2022-10-17 17:24:07,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:24:07,842 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 435 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:07,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 1397 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:24:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12378 states. [2022-10-17 17:24:08,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12378 to 9013. [2022-10-17 17:24:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9013 states, 6973 states have (on average 1.3562311773985372) internal successors, (9457), 7021 states have internal predecessors, (9457), 1235 states have call successors, (1235), 805 states have call predecessors, (1235), 804 states have return successors, (1232), 1187 states have call predecessors, (1232), 1232 states have call successors, (1232) [2022-10-17 17:24:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9013 states to 9013 states and 11924 transitions. [2022-10-17 17:24:08,924 INFO L78 Accepts]: Start accepts. Automaton has 9013 states and 11924 transitions. Word has length 66 [2022-10-17 17:24:08,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:08,924 INFO L495 AbstractCegarLoop]: Abstraction has 9013 states and 11924 transitions. [2022-10-17 17:24:08,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:24:08,924 INFO L276 IsEmpty]: Start isEmpty. Operand 9013 states and 11924 transitions. [2022-10-17 17:24:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-10-17 17:24:08,929 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:08,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:08,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 17:24:08,929 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:24:08,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:08,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1721327867, now seen corresponding path program 1 times [2022-10-17 17:24:08,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:08,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346241093] [2022-10-17 17:24:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:08,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:24:08,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:08,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346241093] [2022-10-17 17:24:08,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346241093] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:08,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:08,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:24:08,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176068842] [2022-10-17 17:24:08,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:08,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:08,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:08,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:08,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:24:08,982 INFO L87 Difference]: Start difference. First operand 9013 states and 11924 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:24:09,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:09,959 INFO L93 Difference]: Finished difference Result 20864 states and 27576 transitions. [2022-10-17 17:24:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:24:09,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-10-17 17:24:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:10,014 INFO L225 Difference]: With dead ends: 20864 [2022-10-17 17:24:10,014 INFO L226 Difference]: Without dead ends: 11857 [2022-10-17 17:24:10,040 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 [2022-10-17 17:24:10,040 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 52 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:10,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 257 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:24:10,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11857 states. [2022-10-17 17:24:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11857 to 11053. [2022-10-17 17:24:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11053 states, 8697 states have (on average 1.3601241807519835) internal successors, (11829), 8753 states have internal predecessors, (11829), 1393 states have call successors, (1393), 963 states have call predecessors, (1393), 962 states have return successors, (1390), 1337 states have call predecessors, (1390), 1390 states have call successors, (1390) [2022-10-17 17:24:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11053 states to 11053 states and 14612 transitions. [2022-10-17 17:24:11,127 INFO L78 Accepts]: Start accepts. Automaton has 11053 states and 14612 transitions. Word has length 69 [2022-10-17 17:24:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:11,127 INFO L495 AbstractCegarLoop]: Abstraction has 11053 states and 14612 transitions. [2022-10-17 17:24:11,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:24:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 11053 states and 14612 transitions. [2022-10-17 17:24:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-10-17 17:24:11,132 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:11,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:11,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 17:24:11,133 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:24:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:11,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1550974787, now seen corresponding path program 1 times [2022-10-17 17:24:11,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:11,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113815554] [2022-10-17 17:24:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:11,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:24:11,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:11,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113815554] [2022-10-17 17:24:11,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113815554] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:11,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:11,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:24:11,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71743295] [2022-10-17 17:24:11,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:11,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:24:11,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:11,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:24:11,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:24:11,217 INFO L87 Difference]: Start difference. First operand 11053 states and 14612 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:24:12,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:12,901 INFO L93 Difference]: Finished difference Result 23158 states and 30980 transitions. [2022-10-17 17:24:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:24:12,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-10-17 17:24:12,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:12,969 INFO L225 Difference]: With dead ends: 23158 [2022-10-17 17:24:12,970 INFO L226 Difference]: Without dead ends: 14615 [2022-10-17 17:24:12,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:24:12,999 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 186 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:13,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 677 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:24:13,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14615 states. [2022-10-17 17:24:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14615 to 12481. [2022-10-17 17:24:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12481 states, 9789 states have (on average 1.3530493410971498) internal successors, (13245), 9881 states have internal predecessors, (13245), 1589 states have call successors, (1589), 1103 states have call predecessors, (1589), 1102 states have return successors, (1586), 1497 states have call predecessors, (1586), 1586 states have call successors, (1586) [2022-10-17 17:24:14,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12481 states to 12481 states and 16420 transitions. [2022-10-17 17:24:14,206 INFO L78 Accepts]: Start accepts. Automaton has 12481 states and 16420 transitions. Word has length 70 [2022-10-17 17:24:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:14,207 INFO L495 AbstractCegarLoop]: Abstraction has 12481 states and 16420 transitions. [2022-10-17 17:24:14,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:24:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 12481 states and 16420 transitions. [2022-10-17 17:24:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-10-17 17:24:14,211 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:14,211 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:14,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 17:24:14,212 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:24:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:14,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1837219835, now seen corresponding path program 1 times [2022-10-17 17:24:14,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:14,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060839498] [2022-10-17 17:24:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:14,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:24:14,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:14,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060839498] [2022-10-17 17:24:14,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060839498] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:24:14,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500469540] [2022-10-17 17:24:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:14,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:24:14,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:24:14,282 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:24:14,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:24:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:14,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:24:14,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:24:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:24:14,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:24:14,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500469540] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:14,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:24:14,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-10-17 17:24:14,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695084140] [2022-10-17 17:24:14,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:14,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:14,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:14,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:14,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:24:14,468 INFO L87 Difference]: Start difference. First operand 12481 states and 16420 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:24:15,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:15,856 INFO L93 Difference]: Finished difference Result 29180 states and 38393 transitions. [2022-10-17 17:24:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:24:15,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-10-17 17:24:15,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:15,923 INFO L225 Difference]: With dead ends: 29180 [2022-10-17 17:24:15,923 INFO L226 Difference]: Without dead ends: 16705 [2022-10-17 17:24:15,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:24:15,954 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 63 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:15,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 268 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:24:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16705 states. [2022-10-17 17:24:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16705 to 15412. [2022-10-17 17:24:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15412 states, 12272 states have (on average 1.3516949152542372) internal successors, (16588), 12372 states have internal predecessors, (16588), 1813 states have call successors, (1813), 1327 states have call predecessors, (1813), 1326 states have return successors, (1810), 1713 states have call predecessors, (1810), 1810 states have call successors, (1810) [2022-10-17 17:24:17,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15412 states to 15412 states and 20211 transitions. [2022-10-17 17:24:17,199 INFO L78 Accepts]: Start accepts. Automaton has 15412 states and 20211 transitions. Word has length 71 [2022-10-17 17:24:17,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:17,200 INFO L495 AbstractCegarLoop]: Abstraction has 15412 states and 20211 transitions. [2022-10-17 17:24:17,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:24:17,200 INFO L276 IsEmpty]: Start isEmpty. Operand 15412 states and 20211 transitions. [2022-10-17 17:24:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-10-17 17:24:17,205 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:17,205 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:17,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:24:17,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 17:24:17,422 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:24:17,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:17,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1572444277, now seen corresponding path program 1 times [2022-10-17 17:24:17,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:17,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625379109] [2022-10-17 17:24:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:17,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-17 17:24:17,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:17,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625379109] [2022-10-17 17:24:17,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625379109] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:17,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:17,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:24:17,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255004186] [2022-10-17 17:24:17,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:17,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:17,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:17,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:24:17,484 INFO L87 Difference]: Start difference. First operand 15412 states and 20211 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 17:24:19,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:19,460 INFO L93 Difference]: Finished difference Result 37059 states and 48669 transitions. [2022-10-17 17:24:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:24:19,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 84 [2022-10-17 17:24:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:19,549 INFO L225 Difference]: With dead ends: 37059 [2022-10-17 17:24:19,549 INFO L226 Difference]: Without dead ends: 22559 [2022-10-17 17:24:19,577 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 [2022-10-17 17:24:19,578 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 101 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:19,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 217 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:24:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22559 states. [2022-10-17 17:24:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22559 to 22536. [2022-10-17 17:24:21,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22536 states, 17966 states have (on average 1.3504953801625292) internal successors, (24263), 18118 states have internal predecessors, (24263), 2621 states have call successors, (2621), 1949 states have call predecessors, (2621), 1948 states have return successors, (2618), 2469 states have call predecessors, (2618), 2618 states have call successors, (2618) [2022-10-17 17:24:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 29502 transitions. [2022-10-17 17:24:21,750 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 29502 transitions. Word has length 84 [2022-10-17 17:24:21,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:21,750 INFO L495 AbstractCegarLoop]: Abstraction has 22536 states and 29502 transitions. [2022-10-17 17:24:21,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 17:24:21,751 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 29502 transitions. [2022-10-17 17:24:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-10-17 17:24:21,758 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:21,758 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:21,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 17:24:21,759 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:24:21,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:21,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1696729866, now seen corresponding path program 1 times [2022-10-17 17:24:21,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:21,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756723191] [2022-10-17 17:24:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:21,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 17:24:22,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:22,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756723191] [2022-10-17 17:24:22,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756723191] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:24:22,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651568455] [2022-10-17 17:24:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:22,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:24:22,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:24:22,181 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:24:22,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50a4bd84-1b2e-4ef7-9570-6bba688e871c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:24:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:22,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:24:22,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:24:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 17:24:22,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:24:22,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651568455] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:22,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:24:22,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [11] total 12 [2022-10-17 17:24:22,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579703748] [2022-10-17 17:24:22,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:22,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:22,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:22,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:24:22,406 INFO L87 Difference]: Start difference. First operand 22536 states and 29502 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12)