./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI --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 b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d --- 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-5e519f3 [2022-11-03 02:46:44,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:46:44,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:46:44,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:46:44,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:46:44,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:46:44,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:46:44,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:46:44,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:46:44,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:46:44,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:46:44,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:46:44,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:46:44,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:46:44,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:46:44,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:46:44,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:46:44,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:46:44,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:46:44,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:46:44,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:46:44,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:46:44,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:46:44,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:46:44,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:46:44,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:46:44,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:46:44,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:46:44,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:46:44,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:46:44,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:46:44,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:46:44,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:46:44,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:46:44,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:46:44,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:46:44,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:46:44,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:46:44,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:46:44,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:46:44,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:46:44,841 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:46:44,882 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:46:44,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:46:44,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:46:44,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:46:44,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:46:44,884 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:46:44,884 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:46:44,884 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:46:44,884 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:46:44,884 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:46:44,885 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:46:44,886 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:46:44,886 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:46:44,886 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:46:44,886 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:46:44,887 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:46:44,887 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:46:44,887 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:46:44,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:46:44,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:46:44,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:46:44,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:46:44,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:46:44,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:46:44,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:46:44,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:46:44,891 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:46:44,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:46:44,891 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:46:44,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:46:44,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:46:44,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:46:44,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:46:44,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:46:44,893 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:46:44,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:46:44,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:46:44,893 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:46:44,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:46:44,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:46:44,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:46:44,894 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_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d [2022-11-03 02:46:45,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:46:45,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:46:45,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:46:45,218 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:46:45,218 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:46:45,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2022-11-03 02:46:45,309 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/data/a2d65dea3/f3f6d32dc2b2458dad7dcdfe44564d05/FLAGbb7b77ae8 [2022-11-03 02:46:45,930 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:46:45,931 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2022-11-03 02:46:45,958 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/data/a2d65dea3/f3f6d32dc2b2458dad7dcdfe44564d05/FLAGbb7b77ae8 [2022-11-03 02:46:46,131 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/data/a2d65dea3/f3f6d32dc2b2458dad7dcdfe44564d05 [2022-11-03 02:46:46,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:46:46,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:46:46,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:46:46,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:46:46,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:46:46,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:46,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62141ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46, skipping insertion in model container [2022-11-03 02:46:46,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:46,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:46:46,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:46:46,595 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_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2022-11-03 02:46:46,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:46:46,786 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:46:46,880 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_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2022-11-03 02:46:46,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:46:46,950 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:46:46,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46 WrapperNode [2022-11-03 02:46:46,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:46:46,952 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:46:46,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:46:46,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:46:46,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:46,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:47,039 INFO L138 Inliner]: procedures = 90, calls = 344, calls flagged for inlining = 25, calls inlined = 21, statements flattened = 819 [2022-11-03 02:46:47,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:46:47,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:46:47,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:46:47,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:46:47,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:47,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:47,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:47,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:47,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:47,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:47,099 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:47,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:47,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:46:47,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:46:47,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:46:47,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:46:47,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46" (1/1) ... [2022-11-03 02:46:47,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:46:47,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:47,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:46:47,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:46:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:46:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-03 02:46:47,202 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-03 02:46:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 02:46:47,202 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 02:46:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:46:47,202 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:46:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:46:47,202 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:46:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 02:46:47,203 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 02:46:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:46:47,203 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:46:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:46:47,203 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:46:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:46:47,204 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:46:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:46:47,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:46:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:46:47,204 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:46:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:46:47,204 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:46:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:46:47,205 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:46:47,205 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-03 02:46:47,205 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-03 02:46:47,205 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:46:47,206 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:46:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:46:47,207 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:46:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-03 02:46:47,208 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-03 02:46:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:46:47,208 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:46:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:46:47,209 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:46:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:46:47,209 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:46:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:46:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2022-11-03 02:46:47,209 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2022-11-03 02:46:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 02:46:47,210 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 02:46:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:46:47,211 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:46:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:46:47,212 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:46:47,213 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:46:47,213 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:46:47,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:46:47,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:46:47,214 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:46:47,214 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:46:47,430 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:46:47,434 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:46:48,734 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:46:49,556 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:46:49,556 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:46:49,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:46:49 BoogieIcfgContainer [2022-11-03 02:46:49,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:46:49,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:46:49,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:46:49,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:46:49,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:46:46" (1/3) ... [2022-11-03 02:46:49,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4f9573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:46:49, skipping insertion in model container [2022-11-03 02:46:49,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:46:46" (2/3) ... [2022-11-03 02:46:49,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4f9573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:46:49, skipping insertion in model container [2022-11-03 02:46:49,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:46:49" (3/3) ... [2022-11-03 02:46:49,570 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product18.cil.c [2022-11-03 02:46:49,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:46:49,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:46:49,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:46:49,695 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;@4fe4d6b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:46:49,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:46:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-11-03 02:46:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:46:49,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:49,724 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] [2022-11-03 02:46:49,724 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:49,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:49,731 INFO L85 PathProgramCache]: Analyzing trace with hash -798544235, now seen corresponding path program 1 times [2022-11-03 02:46:49,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:49,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868835191] [2022-11-03 02:46:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:49,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:46:50,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:50,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868835191] [2022-11-03 02:46:50,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868835191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:50,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977830822] [2022-11-03 02:46:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:50,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:50,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:50,553 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:50,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:46:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:50,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1461 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:46:50,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:51,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:51,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977830822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:51,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:51,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:46:51,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316567880] [2022-11-03 02:46:51,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:51,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:51,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:51,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:51,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:51,086 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 02:46:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:51,409 INFO L93 Difference]: Finished difference Result 1095 states and 1764 transitions. [2022-11-03 02:46:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:51,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-11-03 02:46:51,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:51,450 INFO L225 Difference]: With dead ends: 1095 [2022-11-03 02:46:51,450 INFO L226 Difference]: Without dead ends: 707 [2022-11-03 02:46:51,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:51,466 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 587 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:51,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1151 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:46:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-11-03 02:46:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2022-11-03 02:46:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 470 states have (on average 1.5829787234042554) internal successors, (744), 505 states have internal predecessors, (744), 180 states have call successors, (180), 45 states have call predecessors, (180), 44 states have return successors, (182), 172 states have call predecessors, (182), 177 states have call successors, (182) [2022-11-03 02:46:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1106 transitions. [2022-11-03 02:46:51,611 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1106 transitions. Word has length 45 [2022-11-03 02:46:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:51,613 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1106 transitions. [2022-11-03 02:46:51,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 02:46:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1106 transitions. [2022-11-03 02:46:51,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:46:51,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:51,623 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] [2022-11-03 02:46:51,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:51,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 02:46:51,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash 702193345, now seen corresponding path program 1 times [2022-11-03 02:46:51,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:51,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009651415] [2022-11-03 02:46:51,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:51,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:46:52,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009651415] [2022-11-03 02:46:52,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009651415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:52,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:52,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:46:52,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681688334] [2022-11-03 02:46:52,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:52,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:52,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:46:52,307 INFO L87 Difference]: Start difference. First operand 695 states and 1106 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:46:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:52,711 INFO L93 Difference]: Finished difference Result 2057 states and 3312 transitions. [2022-11-03 02:46:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:52,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2022-11-03 02:46:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:52,730 INFO L225 Difference]: With dead ends: 2057 [2022-11-03 02:46:52,730 INFO L226 Difference]: Without dead ends: 1374 [2022-11-03 02:46:52,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:46:52,736 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 576 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:52,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1269 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:46:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2022-11-03 02:46:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1290. [2022-11-03 02:46:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 903 states have (on average 1.6046511627906976) internal successors, (1449), 957 states have internal predecessors, (1449), 311 states have call successors, (311), 76 states have call predecessors, (311), 75 states have return successors, (330), 286 states have call predecessors, (330), 307 states have call successors, (330) [2022-11-03 02:46:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 2090 transitions. [2022-11-03 02:46:52,861 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 2090 transitions. Word has length 46 [2022-11-03 02:46:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:52,861 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 2090 transitions. [2022-11-03 02:46:52,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:46:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 2090 transitions. [2022-11-03 02:46:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:46:52,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:52,866 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:52,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:46:52,867 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:52,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:52,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1293257843, now seen corresponding path program 1 times [2022-11-03 02:46:52,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:52,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614375528] [2022-11-03 02:46:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:52,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:46:53,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:53,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614375528] [2022-11-03 02:46:53,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614375528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:53,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:53,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:46:53,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441777811] [2022-11-03 02:46:53,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:53,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:46:53,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:46:53,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:46:53,378 INFO L87 Difference]: Start difference. First operand 1290 states and 2090 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:46:54,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:54,323 INFO L93 Difference]: Finished difference Result 3320 states and 5551 transitions. [2022-11-03 02:46:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:46:54,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 70 [2022-11-03 02:46:54,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:54,345 INFO L225 Difference]: With dead ends: 3320 [2022-11-03 02:46:54,346 INFO L226 Difference]: Without dead ends: 2042 [2022-11-03 02:46:54,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:46:54,359 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 641 mSDsluCounter, 2676 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 3268 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:54,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 3268 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:46:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2022-11-03 02:46:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1882. [2022-11-03 02:46:54,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1323 states have (on average 1.600151171579743) internal successors, (2117), 1409 states have internal predecessors, (2117), 448 states have call successors, (448), 111 states have call predecessors, (448), 110 states have return successors, (512), 407 states have call predecessors, (512), 443 states have call successors, (512) [2022-11-03 02:46:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 3077 transitions. [2022-11-03 02:46:54,491 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 3077 transitions. Word has length 70 [2022-11-03 02:46:54,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:54,493 INFO L495 AbstractCegarLoop]: Abstraction has 1882 states and 3077 transitions. [2022-11-03 02:46:54,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:46:54,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 3077 transitions. [2022-11-03 02:46:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:46:54,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:54,500 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:54,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:46:54,500 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:54,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:54,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2065714748, now seen corresponding path program 1 times [2022-11-03 02:46:54,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:54,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574962706] [2022-11-03 02:46:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:54,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:46:54,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:54,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574962706] [2022-11-03 02:46:54,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574962706] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:54,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995334189] [2022-11-03 02:46:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:54,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:54,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:54,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:54,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:46:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:55,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:46:55,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:55,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:55,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995334189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:55,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:55,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:46:55,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218446497] [2022-11-03 02:46:55,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:55,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:55,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:55,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:55,309 INFO L87 Difference]: Start difference. First operand 1882 states and 3077 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, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:46:55,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:55,609 INFO L93 Difference]: Finished difference Result 4643 states and 7714 transitions. [2022-11-03 02:46:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:55,610 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, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2022-11-03 02:46:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:55,635 INFO L225 Difference]: With dead ends: 4643 [2022-11-03 02:46:55,635 INFO L226 Difference]: Without dead ends: 2773 [2022-11-03 02:46:55,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:55,688 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 554 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:55,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 1174 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:46:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2022-11-03 02:46:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2706. [2022-11-03 02:46:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2706 states, 1911 states have (on average 1.6033490319204604) internal successors, (3064), 2040 states have internal predecessors, (3064), 636 states have call successors, (636), 156 states have call predecessors, (636), 158 states have return successors, (741), 578 states have call predecessors, (741), 631 states have call successors, (741) [2022-11-03 02:46:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2706 states to 2706 states and 4441 transitions. [2022-11-03 02:46:55,930 INFO L78 Accepts]: Start accepts. Automaton has 2706 states and 4441 transitions. Word has length 69 [2022-11-03 02:46:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:55,931 INFO L495 AbstractCegarLoop]: Abstraction has 2706 states and 4441 transitions. [2022-11-03 02:46:55,931 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, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:46:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2706 states and 4441 transitions. [2022-11-03 02:46:55,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:46:55,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:55,937 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:55,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:56,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:56,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:56,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:56,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2118686884, now seen corresponding path program 1 times [2022-11-03 02:46:56,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:56,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832110438] [2022-11-03 02:46:56,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:56,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:46:56,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:56,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832110438] [2022-11-03 02:46:56,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832110438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:56,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224851059] [2022-11-03 02:46:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:56,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:56,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:56,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:56,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:46:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:56,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:46:56,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:57,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:57,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224851059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:57,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:57,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 02:46:57,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283408172] [2022-11-03 02:46:57,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:57,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:46:57,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:46:57,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:46:57,005 INFO L87 Difference]: Start difference. First operand 2706 states and 4441 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-03 02:46:57,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:57,677 INFO L93 Difference]: Finished difference Result 7262 states and 12194 transitions. [2022-11-03 02:46:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:46:57,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 70 [2022-11-03 02:46:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:57,717 INFO L225 Difference]: With dead ends: 7262 [2022-11-03 02:46:57,717 INFO L226 Difference]: Without dead ends: 4568 [2022-11-03 02:46:57,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:46:57,742 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 501 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:57,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1826 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:46:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4568 states. [2022-11-03 02:46:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4568 to 4534. [2022-11-03 02:46:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4534 states, 3197 states have (on average 1.5386299655927431) internal successors, (4919), 3432 states have internal predecessors, (4919), 1061 states have call successors, (1061), 276 states have call predecessors, (1061), 275 states have return successors, (1341), 938 states have call predecessors, (1341), 1053 states have call successors, (1341) [2022-11-03 02:46:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4534 states to 4534 states and 7321 transitions. [2022-11-03 02:46:58,094 INFO L78 Accepts]: Start accepts. Automaton has 4534 states and 7321 transitions. Word has length 70 [2022-11-03 02:46:58,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:58,095 INFO L495 AbstractCegarLoop]: Abstraction has 4534 states and 7321 transitions. [2022-11-03 02:46:58,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-03 02:46:58,095 INFO L276 IsEmpty]: Start isEmpty. Operand 4534 states and 7321 transitions. [2022-11-03 02:46:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:46:58,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:58,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:58,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:58,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:58,319 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:58,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:58,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1412345651, now seen corresponding path program 1 times [2022-11-03 02:46:58,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:58,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327317029] [2022-11-03 02:46:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:58,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:46:58,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:58,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327317029] [2022-11-03 02:46:58,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327317029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:58,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371311262] [2022-11-03 02:46:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:58,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:58,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:58,981 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:59,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:46:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:59,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:46:59,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:46:59,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:59,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371311262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:59,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:59,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-03 02:46:59,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720807531] [2022-11-03 02:46:59,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:59,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:46:59,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:59,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:46:59,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:46:59,410 INFO L87 Difference]: Start difference. First operand 4534 states and 7321 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:47:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:00,071 INFO L93 Difference]: Finished difference Result 8960 states and 14810 transitions. [2022-11-03 02:47:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:47:00,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2022-11-03 02:47:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:00,129 INFO L225 Difference]: With dead ends: 8960 [2022-11-03 02:47:00,129 INFO L226 Difference]: Without dead ends: 5599 [2022-11-03 02:47:00,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:47:00,160 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 117 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:00,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1752 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:47:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2022-11-03 02:47:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 5055. [2022-11-03 02:47:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5055 states, 3488 states have (on average 1.533256880733945) internal successors, (5348), 3796 states have internal predecessors, (5348), 1284 states have call successors, (1284), 276 states have call predecessors, (1284), 282 states have return successors, (1616), 1137 states have call predecessors, (1616), 1276 states have call successors, (1616) [2022-11-03 02:47:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5055 states to 5055 states and 8248 transitions. [2022-11-03 02:47:00,589 INFO L78 Accepts]: Start accepts. Automaton has 5055 states and 8248 transitions. Word has length 80 [2022-11-03 02:47:00,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:00,590 INFO L495 AbstractCegarLoop]: Abstraction has 5055 states and 8248 transitions. [2022-11-03 02:47:00,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:47:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 5055 states and 8248 transitions. [2022-11-03 02:47:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 02:47:00,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:00,595 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:00,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:00,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:47:00,809 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:00,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:00,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1072806673, now seen corresponding path program 1 times [2022-11-03 02:47:00,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:00,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694537044] [2022-11-03 02:47:00,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:00,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:47:01,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:01,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694537044] [2022-11-03 02:47:01,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694537044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:01,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830158187] [2022-11-03 02:47:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:01,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:01,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:01,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:01,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:47:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:01,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:47:01,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:47:02,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:47:02,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830158187] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:02,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:47:02,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 18 [2022-11-03 02:47:02,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113671131] [2022-11-03 02:47:02,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:02,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:47:02,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:02,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:47:02,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:47:02,447 INFO L87 Difference]: Start difference. First operand 5055 states and 8248 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-03 02:47:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:05,054 INFO L93 Difference]: Finished difference Result 10256 states and 16890 transitions. [2022-11-03 02:47:05,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:47:05,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 84 [2022-11-03 02:47:05,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:05,115 INFO L225 Difference]: With dead ends: 10256 [2022-11-03 02:47:05,115 INFO L226 Difference]: Without dead ends: 6392 [2022-11-03 02:47:05,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:47:05,149 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 1356 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 2056 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:05,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1441 Valid, 2056 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:47:05,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6392 states. [2022-11-03 02:47:05,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6392 to 5232. [2022-11-03 02:47:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5232 states, 3704 states have (on average 1.509719222462203) internal successors, (5592), 3978 states have internal predecessors, (5592), 1191 states have call successors, (1191), 300 states have call predecessors, (1191), 336 states have return successors, (1604), 1056 states have call predecessors, (1604), 1183 states have call successors, (1604) [2022-11-03 02:47:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5232 states to 5232 states and 8387 transitions. [2022-11-03 02:47:05,731 INFO L78 Accepts]: Start accepts. Automaton has 5232 states and 8387 transitions. Word has length 84 [2022-11-03 02:47:05,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:05,731 INFO L495 AbstractCegarLoop]: Abstraction has 5232 states and 8387 transitions. [2022-11-03 02:47:05,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-03 02:47:05,732 INFO L276 IsEmpty]: Start isEmpty. Operand 5232 states and 8387 transitions. [2022-11-03 02:47:05,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:47:05,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:05,742 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:05,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:05,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:47:05,957 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:05,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:05,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2125653677, now seen corresponding path program 1 times [2022-11-03 02:47:05,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:05,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77125565] [2022-11-03 02:47:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:05,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:47:06,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:06,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77125565] [2022-11-03 02:47:06,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77125565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:06,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565744065] [2022-11-03 02:47:06,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:06,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:06,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:06,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:06,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:47:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:07,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:47:07,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:47:07,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:47:07,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565744065] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:07,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:47:07,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2022-11-03 02:47:07,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582921087] [2022-11-03 02:47:07,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:07,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:47:07,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:07,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:47:07,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:47:07,925 INFO L87 Difference]: Start difference. First operand 5232 states and 8387 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 02:47:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:13,004 INFO L93 Difference]: Finished difference Result 14935 states and 26480 transitions. [2022-11-03 02:47:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:47:13,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-11-03 02:47:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:13,100 INFO L225 Difference]: With dead ends: 14935 [2022-11-03 02:47:13,100 INFO L226 Difference]: Without dead ends: 11329 [2022-11-03 02:47:13,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:47:13,137 INFO L413 NwaCegarLoop]: 698 mSDtfsCounter, 3081 mSDsluCounter, 2739 mSDsCounter, 0 mSdLazyCounter, 3119 mSolverCounterSat, 1473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3170 SdHoareTripleChecker+Valid, 3267 SdHoareTripleChecker+Invalid, 4592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1473 IncrementalHoareTripleChecker+Valid, 3119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:13,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3170 Valid, 3267 Invalid, 4592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1473 Valid, 3119 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 02:47:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11329 states. [2022-11-03 02:47:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11329 to 10019. [2022-11-03 02:47:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10019 states, 7221 states have (on average 1.5186262290541477) internal successors, (10966), 7692 states have internal predecessors, (10966), 2118 states have call successors, (2118), 567 states have call predecessors, (2118), 679 states have return successors, (3649), 1919 states have call predecessors, (3649), 2107 states have call successors, (3649) [2022-11-03 02:47:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10019 states to 10019 states and 16733 transitions. [2022-11-03 02:47:14,378 INFO L78 Accepts]: Start accepts. Automaton has 10019 states and 16733 transitions. Word has length 87 [2022-11-03 02:47:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:14,379 INFO L495 AbstractCegarLoop]: Abstraction has 10019 states and 16733 transitions. [2022-11-03 02:47:14,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 02:47:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 10019 states and 16733 transitions. [2022-11-03 02:47:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 02:47:14,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:14,385 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:14,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:14,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:14,613 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:14,614 INFO L85 PathProgramCache]: Analyzing trace with hash -244062412, now seen corresponding path program 1 times [2022-11-03 02:47:14,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:14,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927000597] [2022-11-03 02:47:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:14,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:47:15,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:15,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927000597] [2022-11-03 02:47:15,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927000597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:15,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937484824] [2022-11-03 02:47:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:15,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:15,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:15,431 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:15,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:47:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:15,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:47:15,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:47:15,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:47:16,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937484824] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:16,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:47:16,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2022-11-03 02:47:16,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076019748] [2022-11-03 02:47:16,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:16,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:47:16,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:16,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:47:16,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:47:16,262 INFO L87 Difference]: Start difference. First operand 10019 states and 16733 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 02:47:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:18,889 INFO L93 Difference]: Finished difference Result 19348 states and 32798 transitions. [2022-11-03 02:47:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:47:18,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-11-03 02:47:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:18,969 INFO L225 Difference]: With dead ends: 19348 [2022-11-03 02:47:18,969 INFO L226 Difference]: Without dead ends: 10955 [2022-11-03 02:47:19,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:47:19,139 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 1201 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:19,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 2067 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:47:19,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10955 states. [2022-11-03 02:47:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10955 to 10019. [2022-11-03 02:47:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10019 states, 7221 states have (on average 1.5186262290541477) internal successors, (10966), 7692 states have internal predecessors, (10966), 2118 states have call successors, (2118), 567 states have call predecessors, (2118), 679 states have return successors, (3637), 1919 states have call predecessors, (3637), 2107 states have call successors, (3637) [2022-11-03 02:47:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10019 states to 10019 states and 16721 transitions. [2022-11-03 02:47:20,022 INFO L78 Accepts]: Start accepts. Automaton has 10019 states and 16721 transitions. Word has length 91 [2022-11-03 02:47:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:20,024 INFO L495 AbstractCegarLoop]: Abstraction has 10019 states and 16721 transitions. [2022-11-03 02:47:20,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 02:47:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 10019 states and 16721 transitions. [2022-11-03 02:47:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:47:20,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:20,032 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:20,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:20,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:20,257 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:20,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1620235772, now seen corresponding path program 1 times [2022-11-03 02:47:20,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:20,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264175414] [2022-11-03 02:47:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:20,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:47:20,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:20,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264175414] [2022-11-03 02:47:20,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264175414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:20,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:47:20,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:47:20,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100334130] [2022-11-03 02:47:20,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:20,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:47:20,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:20,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:47:20,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:47:20,583 INFO L87 Difference]: Start difference. First operand 10019 states and 16721 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-03 02:47:21,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:21,787 INFO L93 Difference]: Finished difference Result 21628 states and 36499 transitions. [2022-11-03 02:47:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:47:21,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 110 [2022-11-03 02:47:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:21,871 INFO L225 Difference]: With dead ends: 21628 [2022-11-03 02:47:21,871 INFO L226 Difference]: Without dead ends: 11621 [2022-11-03 02:47:21,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:47:21,926 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 435 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:21,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 1707 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:47:21,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11621 states. [2022-11-03 02:47:23,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11621 to 11319. [2022-11-03 02:47:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11319 states, 8141 states have (on average 1.4921999754329935) internal successors, (12148), 8596 states have internal predecessors, (12148), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 811 states have return successors, (4141), 2201 states have call predecessors, (4141), 2349 states have call successors, (4141) [2022-11-03 02:47:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11319 states to 11319 states and 18655 transitions. [2022-11-03 02:47:23,156 INFO L78 Accepts]: Start accepts. Automaton has 11319 states and 18655 transitions. Word has length 110 [2022-11-03 02:47:23,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:23,157 INFO L495 AbstractCegarLoop]: Abstraction has 11319 states and 18655 transitions. [2022-11-03 02:47:23,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-03 02:47:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 11319 states and 18655 transitions. [2022-11-03 02:47:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 02:47:23,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:23,163 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:23,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:47:23,164 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:23,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:23,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2131468541, now seen corresponding path program 1 times [2022-11-03 02:47:23,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:23,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033925277] [2022-11-03 02:47:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:23,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:47:23,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:23,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033925277] [2022-11-03 02:47:23,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033925277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:23,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485962048] [2022-11-03 02:47:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:23,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:23,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:23,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:23,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:47:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:24,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:47:24,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:47:24,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:24,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485962048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:24,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:47:24,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-03 02:47:24,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468000639] [2022-11-03 02:47:24,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:24,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:47:24,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:47:24,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:47:24,162 INFO L87 Difference]: Start difference. First operand 11319 states and 18655 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:47:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:25,241 INFO L93 Difference]: Finished difference Result 21798 states and 37277 transitions. [2022-11-03 02:47:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:47:25,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 111 [2022-11-03 02:47:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:25,312 INFO L225 Difference]: With dead ends: 21798 [2022-11-03 02:47:25,312 INFO L226 Difference]: Without dead ends: 11694 [2022-11-03 02:47:25,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:47:25,369 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 2 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:25,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2262 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:47:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11694 states. [2022-11-03 02:47:26,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11694 to 11541. [2022-11-03 02:47:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11541 states, 8291 states have (on average 1.483295139307683) internal successors, (12298), 8779 states have internal predecessors, (12298), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 883 states have return successors, (4623), 2240 states have call predecessors, (4623), 2349 states have call successors, (4623) [2022-11-03 02:47:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11541 states to 11541 states and 19287 transitions. [2022-11-03 02:47:26,327 INFO L78 Accepts]: Start accepts. Automaton has 11541 states and 19287 transitions. Word has length 111 [2022-11-03 02:47:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:26,328 INFO L495 AbstractCegarLoop]: Abstraction has 11541 states and 19287 transitions. [2022-11-03 02:47:26,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:47:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 11541 states and 19287 transitions. [2022-11-03 02:47:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:47:26,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:26,338 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:26,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:26,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:47:26,553 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:26,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:26,553 INFO L85 PathProgramCache]: Analyzing trace with hash -882890334, now seen corresponding path program 1 times [2022-11-03 02:47:26,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:26,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383493637] [2022-11-03 02:47:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:26,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:47:27,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:27,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383493637] [2022-11-03 02:47:27,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383493637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:27,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966573182] [2022-11-03 02:47:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:27,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:27,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:27,255 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:27,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:47:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:27,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:47:27,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:47:27,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:27,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966573182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:27,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:47:27,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-03 02:47:27,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315441441] [2022-11-03 02:47:27,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:27,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:47:27,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:27,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:47:27,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:47:27,705 INFO L87 Difference]: Start difference. First operand 11541 states and 19287 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:47:28,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:28,868 INFO L93 Difference]: Finished difference Result 23853 states and 41402 transitions. [2022-11-03 02:47:28,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:47:28,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 122 [2022-11-03 02:47:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:28,940 INFO L225 Difference]: With dead ends: 23853 [2022-11-03 02:47:28,940 INFO L226 Difference]: Without dead ends: 11188 [2022-11-03 02:47:29,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:47:29,030 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 241 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:29,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1585 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:47:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11188 states. [2022-11-03 02:47:30,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11188 to 11155. [2022-11-03 02:47:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 7979 states have (on average 1.452562977816769) internal successors, (11590), 8457 states have internal predecessors, (11590), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-11-03 02:47:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 18322 transitions. [2022-11-03 02:47:30,252 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 18322 transitions. Word has length 122 [2022-11-03 02:47:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:30,253 INFO L495 AbstractCegarLoop]: Abstraction has 11155 states and 18322 transitions. [2022-11-03 02:47:30,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:47:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 18322 transitions. [2022-11-03 02:47:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:47:30,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:30,268 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:30,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:30,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:47:30,481 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:30,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash -512095214, now seen corresponding path program 1 times [2022-11-03 02:47:30,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:30,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555249522] [2022-11-03 02:47:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:30,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:47:31,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:31,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555249522] [2022-11-03 02:47:31,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555249522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:31,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545233135] [2022-11-03 02:47:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:31,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:31,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:31,176 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:31,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:47:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:31,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:47:31,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:47:31,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:31,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545233135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:31,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:47:31,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-03 02:47:31,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662178870] [2022-11-03 02:47:31,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:31,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:47:31,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:47:31,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:47:31,624 INFO L87 Difference]: Start difference. First operand 11155 states and 18322 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:47:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:32,523 INFO L93 Difference]: Finished difference Result 23289 states and 39619 transitions. [2022-11-03 02:47:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:47:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 126 [2022-11-03 02:47:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:32,594 INFO L225 Difference]: With dead ends: 23289 [2022-11-03 02:47:32,594 INFO L226 Difference]: Without dead ends: 11155 [2022-11-03 02:47:32,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:47:32,672 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 239 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:32,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1554 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:47:32,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11155 states. [2022-11-03 02:47:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11155 to 11155. [2022-11-03 02:47:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 7979 states have (on average 1.4167188870785812) internal successors, (11304), 8457 states have internal predecessors, (11304), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-11-03 02:47:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 18036 transitions. [2022-11-03 02:47:33,521 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 18036 transitions. Word has length 126 [2022-11-03 02:47:33,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:33,522 INFO L495 AbstractCegarLoop]: Abstraction has 11155 states and 18036 transitions. [2022-11-03 02:47:33,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:47:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 18036 transitions. [2022-11-03 02:47:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:47:33,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:33,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:33,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:33,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:33,761 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:33,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1737810549, now seen corresponding path program 1 times [2022-11-03 02:47:33,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:33,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798518698] [2022-11-03 02:47:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:33,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:47:34,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:34,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798518698] [2022-11-03 02:47:34,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798518698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:34,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195080052] [2022-11-03 02:47:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:34,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:34,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:34,058 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:34,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:47:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:34,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 2321 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:47:34,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:47:34,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:34,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195080052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:34,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:47:34,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-03 02:47:34,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569041298] [2022-11-03 02:47:34,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:34,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:47:34,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:34,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:47:34,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:47:34,608 INFO L87 Difference]: Start difference. First operand 11155 states and 18036 transitions. Second operand has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-03 02:47:38,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:38,045 INFO L93 Difference]: Finished difference Result 24266 states and 40023 transitions. [2022-11-03 02:47:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:47:38,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 129 [2022-11-03 02:47:38,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:38,138 INFO L225 Difference]: With dead ends: 24266 [2022-11-03 02:47:38,139 INFO L226 Difference]: Without dead ends: 13081 [2022-11-03 02:47:38,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:47:38,338 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 1104 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 3126 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 3618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 3126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:38,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1188 Valid, 1743 Invalid, 3618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 3126 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 02:47:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13081 states. [2022-11-03 02:47:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13081 to 11140. [2022-11-03 02:47:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11140 states, 7964 states have (on average 1.4171270718232045) internal successors, (11286), 8442 states have internal predecessors, (11286), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-11-03 02:47:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11140 states to 11140 states and 18018 transitions. [2022-11-03 02:47:39,105 INFO L78 Accepts]: Start accepts. Automaton has 11140 states and 18018 transitions. Word has length 129 [2022-11-03 02:47:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:39,105 INFO L495 AbstractCegarLoop]: Abstraction has 11140 states and 18018 transitions. [2022-11-03 02:47:39,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-03 02:47:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 11140 states and 18018 transitions. [2022-11-03 02:47:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:47:39,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:39,117 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:39,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:39,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:47:39,345 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:39,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1264590365, now seen corresponding path program 1 times [2022-11-03 02:47:39,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:39,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708558351] [2022-11-03 02:47:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:39,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 02:47:40,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:40,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708558351] [2022-11-03 02:47:40,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708558351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:40,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386694265] [2022-11-03 02:47:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:40,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:40,043 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:40,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:47:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 2348 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:47:40,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:47:40,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:40,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386694265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:40,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:47:40,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-11-03 02:47:40,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505530777] [2022-11-03 02:47:40,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:40,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:47:40,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:40,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:47:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:47:40,591 INFO L87 Difference]: Start difference. First operand 11140 states and 18018 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-03 02:47:42,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:42,108 INFO L93 Difference]: Finished difference Result 26182 states and 43889 transitions. [2022-11-03 02:47:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:47:42,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 137 [2022-11-03 02:47:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:42,223 INFO L225 Difference]: With dead ends: 26182 [2022-11-03 02:47:42,223 INFO L226 Difference]: Without dead ends: 15054 [2022-11-03 02:47:42,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:47:42,323 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 462 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:42,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 1325 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:47:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2022-11-03 02:47:43,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 14738. [2022-11-03 02:47:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14738 states, 10553 states have (on average 1.4159954515303705) internal successors, (14943), 11212 states have internal predecessors, (14943), 3035 states have call successors, (3035), 873 states have call predecessors, (3035), 1149 states have return successors, (5986), 2872 states have call predecessors, (5986), 3018 states have call successors, (5986) [2022-11-03 02:47:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14738 states to 14738 states and 23964 transitions. [2022-11-03 02:47:43,837 INFO L78 Accepts]: Start accepts. Automaton has 14738 states and 23964 transitions. Word has length 137 [2022-11-03 02:47:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:43,837 INFO L495 AbstractCegarLoop]: Abstraction has 14738 states and 23964 transitions. [2022-11-03 02:47:43,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-03 02:47:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 14738 states and 23964 transitions. [2022-11-03 02:47:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 02:47:43,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:43,853 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:43,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:44,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:47:44,081 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:44,081 INFO L85 PathProgramCache]: Analyzing trace with hash -110646351, now seen corresponding path program 1 times [2022-11-03 02:47:44,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:44,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415562210] [2022-11-03 02:47:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:44,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:47:44,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:44,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415562210] [2022-11-03 02:47:44,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415562210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:44,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530589334] [2022-11-03 02:47:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:44,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:44,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:44,702 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:44,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:47:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:47:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:47:45,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:47:45,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530589334] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:45,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:47:45,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 19 [2022-11-03 02:47:45,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619552356] [2022-11-03 02:47:45,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:45,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:47:45,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:45,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:47:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:47:45,541 INFO L87 Difference]: Start difference. First operand 14738 states and 23964 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 02:47:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:50,251 INFO L93 Difference]: Finished difference Result 38197 states and 67453 transitions. [2022-11-03 02:47:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:47:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 141 [2022-11-03 02:47:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:50,396 INFO L225 Difference]: With dead ends: 38197 [2022-11-03 02:47:50,396 INFO L226 Difference]: Without dead ends: 25677 [2022-11-03 02:47:50,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 277 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:47:50,525 INFO L413 NwaCegarLoop]: 961 mSDtfsCounter, 2206 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 1027 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2277 SdHoareTripleChecker+Valid, 2022 SdHoareTripleChecker+Invalid, 3226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:50,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2277 Valid, 2022 Invalid, 3226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1027 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:47:50,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25677 states. [2022-11-03 02:47:52,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25677 to 22811. [2022-11-03 02:47:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22811 states, 16183 states have (on average 1.4181548538589879) internal successors, (22950), 17233 states have internal predecessors, (22950), 4810 states have call successors, (4810), 1445 states have call predecessors, (4810), 1817 states have return successors, (9505), 4512 states have call predecessors, (9505), 4784 states have call successors, (9505) [2022-11-03 02:47:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22811 states to 22811 states and 37265 transitions. [2022-11-03 02:47:52,313 INFO L78 Accepts]: Start accepts. Automaton has 22811 states and 37265 transitions. Word has length 141 [2022-11-03 02:47:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:52,313 INFO L495 AbstractCegarLoop]: Abstraction has 22811 states and 37265 transitions. [2022-11-03 02:47:52,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 02:47:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 22811 states and 37265 transitions. [2022-11-03 02:47:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 02:47:52,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:52,323 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:52,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:52,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:52,537 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:52,537 INFO L85 PathProgramCache]: Analyzing trace with hash 859706400, now seen corresponding path program 1 times [2022-11-03 02:47:52,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:52,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64309886] [2022-11-03 02:47:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:52,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:47:53,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:53,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64309886] [2022-11-03 02:47:53,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64309886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:53,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489293842] [2022-11-03 02:47:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:53,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:53,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:53,470 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:53,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:47:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:53,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2362 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:47:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:47:53,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:53,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489293842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:53,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:47:53,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-11-03 02:47:53,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033356202] [2022-11-03 02:47:53,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:53,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:47:53,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:53,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:47:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:47:53,938 INFO L87 Difference]: Start difference. First operand 22811 states and 37265 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:47:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:56,207 INFO L93 Difference]: Finished difference Result 44525 states and 74855 transitions. [2022-11-03 02:47:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:47:56,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 141 [2022-11-03 02:47:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:56,364 INFO L225 Difference]: With dead ends: 44525 [2022-11-03 02:47:56,364 INFO L226 Difference]: Without dead ends: 23926 [2022-11-03 02:47:56,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:47:56,512 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 33 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:56,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1104 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:47:56,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23926 states. [2022-11-03 02:47:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23926 to 23250. [2022-11-03 02:47:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23250 states, 16537 states have (on average 1.4135574771724013) internal successors, (23376), 17606 states have internal predecessors, (23376), 4884 states have call successors, (4884), 1442 states have call predecessors, (4884), 1828 states have return successors, (9563), 4585 states have call predecessors, (9563), 4858 states have call successors, (9563) [2022-11-03 02:47:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23250 states to 23250 states and 37823 transitions. [2022-11-03 02:47:58,698 INFO L78 Accepts]: Start accepts. Automaton has 23250 states and 37823 transitions. Word has length 141 [2022-11-03 02:47:58,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:58,699 INFO L495 AbstractCegarLoop]: Abstraction has 23250 states and 37823 transitions. [2022-11-03 02:47:58,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:47:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 23250 states and 37823 transitions. [2022-11-03 02:47:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 02:47:58,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:58,711 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:58,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:58,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:47:58,912 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:58,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2133524433, now seen corresponding path program 1 times [2022-11-03 02:47:58,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:58,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703942162] [2022-11-03 02:47:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:58,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:47:59,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:59,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703942162] [2022-11-03 02:47:59,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703942162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:59,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208595624] [2022-11-03 02:47:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:59,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:59,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:59,712 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:59,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:48:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:00,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 2364 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:48:00,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:48:00,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:48:00,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208595624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:00,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:48:00,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2022-11-03 02:48:00,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859494646] [2022-11-03 02:48:00,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:00,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:48:00,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:48:00,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:48:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:48:00,269 INFO L87 Difference]: Start difference. First operand 23250 states and 37823 transitions. Second operand has 9 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-03 02:48:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:04,302 INFO L93 Difference]: Finished difference Result 58803 states and 97446 transitions. [2022-11-03 02:48:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:48:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) Word has length 143 [2022-11-03 02:48:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:04,615 INFO L225 Difference]: With dead ends: 58803 [2022-11-03 02:48:04,615 INFO L226 Difference]: Without dead ends: 37765 [2022-11-03 02:48:04,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:48:04,706 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 578 mSDsluCounter, 4141 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 4568 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:04,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 4568 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:48:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37765 states. [2022-11-03 02:48:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37765 to 36013. [2022-11-03 02:48:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36013 states, 25636 states have (on average 1.4200343267280386) internal successors, (36404), 27341 states have internal predecessors, (36404), 7567 states have call successors, (7567), 2267 states have call predecessors, (7567), 2809 states have return successors, (15577), 7024 states have call predecessors, (15577), 7523 states have call successors, (15577) [2022-11-03 02:48:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36013 states to 36013 states and 59548 transitions. [2022-11-03 02:48:08,126 INFO L78 Accepts]: Start accepts. Automaton has 36013 states and 59548 transitions. Word has length 143 [2022-11-03 02:48:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:08,126 INFO L495 AbstractCegarLoop]: Abstraction has 36013 states and 59548 transitions. [2022-11-03 02:48:08,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-03 02:48:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 36013 states and 59548 transitions. [2022-11-03 02:48:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 02:48:08,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:08,141 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:48:08,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:08,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:48:08,342 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:08,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:08,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1185378747, now seen corresponding path program 1 times [2022-11-03 02:48:08,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:48:08,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652350539] [2022-11-03 02:48:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:08,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:48:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:48:09,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:09,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652350539] [2022-11-03 02:48:09,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652350539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:09,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537076751] [2022-11-03 02:48:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:09,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:09,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:09,263 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:09,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3443a8ee-6f3b-400b-98b5-02fb9a5d7985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:48:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:09,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 2377 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:48:09,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:48:09,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:48:10,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537076751] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:10,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:48:10,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 20 [2022-11-03 02:48:10,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780758258] [2022-11-03 02:48:10,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:10,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:48:10,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:48:10,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:48:10,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:48:10,144 INFO L87 Difference]: Start difference. First operand 36013 states and 59548 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2022-11-03 02:48:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:17,123 INFO L93 Difference]: Finished difference Result 85422 states and 150581 transitions. [2022-11-03 02:48:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:48:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) Word has length 147 [2022-11-03 02:48:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:17,365 INFO L225 Difference]: With dead ends: 85422 [2022-11-03 02:48:17,366 INFO L226 Difference]: Without dead ends: 51683 [2022-11-03 02:48:17,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:48:17,841 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 1474 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:17,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1544 Valid, 1670 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 1933 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:48:17,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51683 states.