./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/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_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/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_729da17c-60b4-4954-bd60-c9a35eee3791/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 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 --- 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 03:47:06,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:47:06,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:47:06,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:47:06,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:47:06,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:47:06,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:47:06,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:47:06,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:47:06,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:47:06,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:47:06,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:47:06,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:47:06,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:47:06,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:47:06,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:47:06,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:47:06,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:47:06,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:47:06,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:47:06,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:47:06,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:47:06,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:47:06,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:47:06,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:47:06,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:47:06,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:47:06,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:47:06,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:47:06,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:47:06,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:47:06,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:47:06,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:47:06,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:47:06,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:47:06,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:47:06,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:47:06,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:47:06,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:47:06,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:47:06,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:47:06,834 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:47:06,867 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:47:06,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:47:06,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:47:06,868 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:47:06,869 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:47:06,869 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:47:06,869 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:47:06,870 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:47:06,870 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:47:06,870 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:47:06,871 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:47:06,871 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:47:06,872 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:47:06,872 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:47:06,872 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:47:06,872 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:47:06,873 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:47:06,873 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:47:06,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:47:06,874 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:47:06,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:47:06,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:47:06,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:47:06,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:47:06,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:47:06,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:47:06,876 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:47:06,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:47:06,876 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:47:06,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:47:06,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:47:06,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:47:06,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:06,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:47:06,878 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:47:06,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:47:06,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:47:06,878 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:47:06,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:47:06,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:47:06,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:47:06,879 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_729da17c-60b4-4954-bd60-c9a35eee3791/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 [2022-11-03 03:47:07,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:47:07,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:47:07,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:47:07,221 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:47:07,222 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:47:07,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2022-11-03 03:47:07,317 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/data/dea9d05b6/f90f7955c61f463595e1eb99102328fd/FLAGd1c9f36b7 [2022-11-03 03:47:07,879 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:47:07,879 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2022-11-03 03:47:07,905 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/data/dea9d05b6/f90f7955c61f463595e1eb99102328fd/FLAGd1c9f36b7 [2022-11-03 03:47:08,137 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/data/dea9d05b6/f90f7955c61f463595e1eb99102328fd [2022-11-03 03:47:08,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:47:08,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:47:08,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:08,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:47:08,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:47:08,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:08" (1/1) ... [2022-11-03 03:47:08,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e5af001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:08, skipping insertion in model container [2022-11-03 03:47:08,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:08" (1/1) ... [2022-11-03 03:47:08,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:47:08,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:47:08,843 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_729da17c-60b4-4954-bd60-c9a35eee3791/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2022-11-03 03:47:08,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:08,902 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:47:09,018 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_729da17c-60b4-4954-bd60-c9a35eee3791/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2022-11-03 03:47:09,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:09,056 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:47:09,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09 WrapperNode [2022-11-03 03:47:09,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:09,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:09,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:47:09,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:47:09,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,191 INFO L138 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 850 [2022-11-03 03:47:09,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:09,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:47:09,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:47:09,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:47:09,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,263 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:47:09,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:47:09,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:47:09,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:47:09,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:09,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:09,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:47:09,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:47:09,374 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-03 03:47:09,375 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-03 03:47:09,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:47:09,375 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 03:47:09,375 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 03:47:09,376 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:47:09,376 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:47:09,376 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:47:09,376 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:47:09,376 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:47:09,376 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:47:09,377 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:47:09,377 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:47:09,377 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:47:09,377 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:47:09,377 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:47:09,377 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:47:09,378 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 03:47:09,378 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 03:47:09,378 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 03:47:09,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 03:47:09,378 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:47:09,378 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:47:09,379 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:47:09,379 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:47:09,379 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:47:09,379 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:47:09,380 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:47:09,380 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:47:09,380 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:47:09,381 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:47:09,382 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2022-11-03 03:47:09,382 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2022-11-03 03:47:09,382 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:47:09,382 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:47:09,382 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:47:09,383 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:47:09,383 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:47:09,383 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:47:09,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:47:09,383 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:47:09,383 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:47:09,384 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:47:09,384 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:47:09,384 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:47:09,385 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:47:09,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:47:09,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:47:09,387 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:47:09,387 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:47:09,566 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:47:09,568 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:47:10,766 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:47:11,586 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:47:11,586 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:47:11,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:11 BoogieIcfgContainer [2022-11-03 03:47:11,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:47:11,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:47:11,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:47:11,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:47:11,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:47:08" (1/3) ... [2022-11-03 03:47:11,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc92319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:11, skipping insertion in model container [2022-11-03 03:47:11,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09" (2/3) ... [2022-11-03 03:47:11,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc92319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:11, skipping insertion in model container [2022-11-03 03:47:11,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:11" (3/3) ... [2022-11-03 03:47:11,600 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product26.cil.c [2022-11-03 03:47:11,620 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:47:11,620 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:47:11,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:47:11,712 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;@51ebca48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:47:11,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:47:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 363 states, 244 states have (on average 1.610655737704918) internal successors, (393), 267 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 03:47:11,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 03:47:11,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:11,738 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] [2022-11-03 03:47:11,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:11,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:11,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1613791628, now seen corresponding path program 1 times [2022-11-03 03:47:11,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:11,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998304605] [2022-11-03 03:47:11,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:11,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:47:12,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:12,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998304605] [2022-11-03 03:47:12,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998304605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:12,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:12,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:47:12,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61397162] [2022-11-03 03:47:12,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:12,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:47:12,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:12,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:47:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:47:12,332 INFO L87 Difference]: Start difference. First operand has 363 states, 244 states have (on average 1.610655737704918) internal successors, (393), 267 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 03:47:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:12,516 INFO L93 Difference]: Finished difference Result 381 states and 608 transitions. [2022-11-03 03:47:12,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:47:12,519 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 50 [2022-11-03 03:47:12,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:12,538 INFO L225 Difference]: With dead ends: 381 [2022-11-03 03:47:12,542 INFO L226 Difference]: Without dead ends: 359 [2022-11-03 03:47:12,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:47:12,554 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:12,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 539 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:12,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-03 03:47:12,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2022-11-03 03:47:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 242 states have (on average 1.5991735537190082) internal successors, (387), 263 states have internal predecessors, (387), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:47:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 570 transitions. [2022-11-03 03:47:12,634 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 570 transitions. Word has length 50 [2022-11-03 03:47:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:12,636 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 570 transitions. [2022-11-03 03:47:12,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 03:47:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 570 transitions. [2022-11-03 03:47:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 03:47:12,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:12,641 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] [2022-11-03 03:47:12,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:47:12,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:12,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:12,642 INFO L85 PathProgramCache]: Analyzing trace with hash 42217211, now seen corresponding path program 1 times [2022-11-03 03:47:12,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:12,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317209944] [2022-11-03 03:47:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:12,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:47:13,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:13,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317209944] [2022-11-03 03:47:13,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317209944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:13,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:13,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:47:13,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016383257] [2022-11-03 03:47:13,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:13,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:47:13,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:13,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:47:13,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:13,360 INFO L87 Difference]: Start difference. First operand 359 states and 570 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-03 03:47:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:15,739 INFO L93 Difference]: Finished difference Result 1163 states and 1893 transitions. [2022-11-03 03:47:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:47:15,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 51 [2022-11-03 03:47:15,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:15,750 INFO L225 Difference]: With dead ends: 1163 [2022-11-03 03:47:15,750 INFO L226 Difference]: Without dead ends: 827 [2022-11-03 03:47:15,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:47:15,756 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 1899 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:15,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1959 Valid, 1031 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 03:47:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-11-03 03:47:15,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 740. [2022-11-03 03:47:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 524 states have (on average 1.6278625954198473) internal successors, (853), 554 states have internal predecessors, (853), 177 states have call successors, (177), 37 states have call predecessors, (177), 38 states have return successors, (179), 161 states have call predecessors, (179), 172 states have call successors, (179) [2022-11-03 03:47:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1209 transitions. [2022-11-03 03:47:15,935 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1209 transitions. Word has length 51 [2022-11-03 03:47:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:15,935 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1209 transitions. [2022-11-03 03:47:15,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-03 03:47:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1209 transitions. [2022-11-03 03:47:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:47:15,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:15,942 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] [2022-11-03 03:47:15,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:47:15,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:15,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:15,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1613769352, now seen corresponding path program 1 times [2022-11-03 03:47:15,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:15,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509947496] [2022-11-03 03:47:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:15,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:47:16,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:16,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509947496] [2022-11-03 03:47:16,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509947496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:16,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:16,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:47:16,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180481048] [2022-11-03 03:47:16,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:16,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:47:16,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:47:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:16,580 INFO L87 Difference]: Start difference. First operand 740 states and 1209 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 03:47:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:19,192 INFO L93 Difference]: Finished difference Result 2506 states and 4147 transitions. [2022-11-03 03:47:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:47:19,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2022-11-03 03:47:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:19,206 INFO L225 Difference]: With dead ends: 2506 [2022-11-03 03:47:19,206 INFO L226 Difference]: Without dead ends: 1790 [2022-11-03 03:47:19,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:47:19,212 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 1642 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:19,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1705 Valid, 2081 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 03:47:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-11-03 03:47:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1703. [2022-11-03 03:47:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1236 states have (on average 1.6472491909385114) internal successors, (2036), 1296 states have internal predecessors, (2036), 379 states have call successors, (379), 76 states have call predecessors, (379), 87 states have return successors, (406), 354 states have call predecessors, (406), 374 states have call successors, (406) [2022-11-03 03:47:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2821 transitions. [2022-11-03 03:47:19,387 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2821 transitions. Word has length 73 [2022-11-03 03:47:19,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:19,390 INFO L495 AbstractCegarLoop]: Abstraction has 1703 states and 2821 transitions. [2022-11-03 03:47:19,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 03:47:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2821 transitions. [2022-11-03 03:47:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:47:19,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:19,403 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] [2022-11-03 03:47:19,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:47:19,404 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:19,405 INFO L85 PathProgramCache]: Analyzing trace with hash 602032287, now seen corresponding path program 1 times [2022-11-03 03:47:19,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:19,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445952961] [2022-11-03 03:47:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:19,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:47:19,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:19,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445952961] [2022-11-03 03:47:19,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445952961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:19,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:19,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:19,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95916144] [2022-11-03 03:47:19,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:19,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:19,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:19,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:19,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:19,806 INFO L87 Difference]: Start difference. First operand 1703 states and 2821 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:20,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:20,078 INFO L93 Difference]: Finished difference Result 2741 states and 4549 transitions. [2022-11-03 03:47:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:20,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 77 [2022-11-03 03:47:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:20,093 INFO L225 Difference]: With dead ends: 2741 [2022-11-03 03:47:20,094 INFO L226 Difference]: Without dead ends: 1743 [2022-11-03 03:47:20,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:20,114 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 7 mSDsluCounter, 1676 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:20,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2117 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-11-03 03:47:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1727. [2022-11-03 03:47:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1254 states have (on average 1.6379585326953747) internal successors, (2054), 1314 states have internal predecessors, (2054), 379 states have call successors, (379), 76 states have call predecessors, (379), 93 states have return successors, (418), 360 states have call predecessors, (418), 374 states have call successors, (418) [2022-11-03 03:47:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2851 transitions. [2022-11-03 03:47:20,272 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2851 transitions. Word has length 77 [2022-11-03 03:47:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:20,273 INFO L495 AbstractCegarLoop]: Abstraction has 1727 states and 2851 transitions. [2022-11-03 03:47:20,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:47:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2851 transitions. [2022-11-03 03:47:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:47:20,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:20,284 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 03:47:20,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:47:20,284 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:20,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:20,285 INFO L85 PathProgramCache]: Analyzing trace with hash 846573937, now seen corresponding path program 1 times [2022-11-03 03:47:20,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:20,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134375034] [2022-11-03 03:47:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:20,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:47:20,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:20,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134375034] [2022-11-03 03:47:20,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134375034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:20,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:20,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:47:20,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820848871] [2022-11-03 03:47:20,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:20,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:47:20,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:20,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:47:20,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:47:20,868 INFO L87 Difference]: Start difference. First operand 1727 states and 2851 transitions. Second operand has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 03:47:24,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:24,104 INFO L93 Difference]: Finished difference Result 4438 states and 7331 transitions. [2022-11-03 03:47:24,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:47:24,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 80 [2022-11-03 03:47:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:24,123 INFO L225 Difference]: With dead ends: 4438 [2022-11-03 03:47:24,123 INFO L226 Difference]: Without dead ends: 2734 [2022-11-03 03:47:24,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:47:24,132 INFO L413 NwaCegarLoop]: 918 mSDtfsCounter, 919 mSDsluCounter, 2209 mSDsCounter, 0 mSdLazyCounter, 4308 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 4671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 4308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:24,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [986 Valid, 2982 Invalid, 4671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 4308 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 03:47:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2022-11-03 03:47:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 2635. [2022-11-03 03:47:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1915 states have (on average 1.6318537859007833) internal successors, (3125), 1997 states have internal predecessors, (3125), 576 states have call successors, (576), 110 states have call predecessors, (576), 143 states have return successors, (639), 560 states have call predecessors, (639), 571 states have call successors, (639) [2022-11-03 03:47:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4340 transitions. [2022-11-03 03:47:24,387 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4340 transitions. Word has length 80 [2022-11-03 03:47:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:24,387 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 4340 transitions. [2022-11-03 03:47:24,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 03:47:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4340 transitions. [2022-11-03 03:47:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 03:47:24,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:24,390 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, 1] [2022-11-03 03:47:24,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:47:24,390 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:24,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:24,391 INFO L85 PathProgramCache]: Analyzing trace with hash -164276473, now seen corresponding path program 1 times [2022-11-03 03:47:24,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:24,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151162856] [2022-11-03 03:47:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:24,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:47:24,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:24,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151162856] [2022-11-03 03:47:24,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151162856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:24,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:24,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:47:24,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333795994] [2022-11-03 03:47:24,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:24,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:47:24,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:24,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:47:24,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:47:24,893 INFO L87 Difference]: Start difference. First operand 2635 states and 4340 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-03 03:47:27,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:27,677 INFO L93 Difference]: Finished difference Result 6397 states and 10536 transitions. [2022-11-03 03:47:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:47:27,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2022-11-03 03:47:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:27,761 INFO L225 Difference]: With dead ends: 6397 [2022-11-03 03:47:27,761 INFO L226 Difference]: Without dead ends: 4277 [2022-11-03 03:47:27,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:47:27,775 INFO L413 NwaCegarLoop]: 827 mSDtfsCounter, 2822 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 1286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2970 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1286 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:27,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2970 Valid, 1596 Invalid, 3174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1286 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 03:47:27,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2022-11-03 03:47:28,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 4169. [2022-11-03 03:47:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 2973 states have (on average 1.5876219307097208) internal successors, (4720), 3112 states have internal predecessors, (4720), 943 states have call successors, (943), 195 states have call predecessors, (943), 252 states have return successors, (1072), 916 states have call predecessors, (1072), 938 states have call successors, (1072) [2022-11-03 03:47:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 6735 transitions. [2022-11-03 03:47:28,197 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 6735 transitions. Word has length 81 [2022-11-03 03:47:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:28,198 INFO L495 AbstractCegarLoop]: Abstraction has 4169 states and 6735 transitions. [2022-11-03 03:47:28,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-03 03:47:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 6735 transitions. [2022-11-03 03:47:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 03:47:28,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:28,201 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, 1, 1, 1, 1] [2022-11-03 03:47:28,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:47:28,202 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:28,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:28,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2128896471, now seen corresponding path program 1 times [2022-11-03 03:47:28,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:28,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489351751] [2022-11-03 03:47:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:28,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:47:28,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:28,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489351751] [2022-11-03 03:47:28,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489351751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:28,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:28,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:28,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173144106] [2022-11-03 03:47:28,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:28,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:28,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:28,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:28,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:28,583 INFO L87 Difference]: Start difference. First operand 4169 states and 6735 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:29,182 INFO L93 Difference]: Finished difference Result 8363 states and 13743 transitions. [2022-11-03 03:47:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:29,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2022-11-03 03:47:29,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:29,224 INFO L225 Difference]: With dead ends: 8363 [2022-11-03 03:47:29,224 INFO L226 Difference]: Without dead ends: 4169 [2022-11-03 03:47:29,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:29,245 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 221 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:29,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2007 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:47:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2022-11-03 03:47:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 4169. [2022-11-03 03:47:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 2973 states have (on average 1.5472586612848973) internal successors, (4600), 3112 states have internal predecessors, (4600), 943 states have call successors, (943), 195 states have call predecessors, (943), 252 states have return successors, (1072), 916 states have call predecessors, (1072), 938 states have call successors, (1072) [2022-11-03 03:47:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 6615 transitions. [2022-11-03 03:47:29,677 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 6615 transitions. Word has length 84 [2022-11-03 03:47:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:29,677 INFO L495 AbstractCegarLoop]: Abstraction has 4169 states and 6615 transitions. [2022-11-03 03:47:29,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:47:29,678 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 6615 transitions. [2022-11-03 03:47:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:47:29,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:29,680 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:47:29,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:47:29,680 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:29,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1552252833, now seen corresponding path program 1 times [2022-11-03 03:47:29,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:29,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777436911] [2022-11-03 03:47:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:29,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:47:30,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:30,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777436911] [2022-11-03 03:47:30,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777436911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:30,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:30,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:47:30,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882384002] [2022-11-03 03:47:30,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:30,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:47:30,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:30,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:47:30,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:30,148 INFO L87 Difference]: Start difference. First operand 4169 states and 6615 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 03:47:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:32,434 INFO L93 Difference]: Finished difference Result 8254 states and 13127 transitions. [2022-11-03 03:47:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:47:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 86 [2022-11-03 03:47:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:32,468 INFO L225 Difference]: With dead ends: 8254 [2022-11-03 03:47:32,468 INFO L226 Difference]: Without dead ends: 4714 [2022-11-03 03:47:32,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:47:32,492 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 917 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:32,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 1804 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 03:47:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2022-11-03 03:47:32,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 4259. [2022-11-03 03:47:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 3033 states have (on average 1.5410484668644906) internal successors, (4674), 3186 states have internal predecessors, (4674), 945 states have call successors, (945), 211 states have call predecessors, (945), 280 states have return successors, (1110), 916 states have call predecessors, (1110), 940 states have call successors, (1110) [2022-11-03 03:47:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 6729 transitions. [2022-11-03 03:47:32,969 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 6729 transitions. Word has length 86 [2022-11-03 03:47:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:32,969 INFO L495 AbstractCegarLoop]: Abstraction has 4259 states and 6729 transitions. [2022-11-03 03:47:32,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 03:47:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 6729 transitions. [2022-11-03 03:47:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-03 03:47:32,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:32,973 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:47:32,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:47:32,973 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2133847790, now seen corresponding path program 1 times [2022-11-03 03:47:32,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:32,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958075598] [2022-11-03 03:47:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:32,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:33,332 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 03:47:33,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:33,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958075598] [2022-11-03 03:47:33,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958075598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:33,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:33,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:47:33,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402678340] [2022-11-03 03:47:33,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:33,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:47:33,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:33,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:47:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:33,335 INFO L87 Difference]: Start difference. First operand 4259 states and 6729 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:47:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:34,167 INFO L93 Difference]: Finished difference Result 4361 states and 6897 transitions. [2022-11-03 03:47:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:34,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 90 [2022-11-03 03:47:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:34,210 INFO L225 Difference]: With dead ends: 4361 [2022-11-03 03:47:34,210 INFO L226 Difference]: Without dead ends: 4346 [2022-11-03 03:47:34,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:47:34,216 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 623 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:34,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1728 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:47:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2022-11-03 03:47:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 4265. [2022-11-03 03:47:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4265 states, 3039 states have (on average 1.539980256663376) internal successors, (4680), 3192 states have internal predecessors, (4680), 945 states have call successors, (945), 211 states have call predecessors, (945), 280 states have return successors, (1110), 916 states have call predecessors, (1110), 940 states have call successors, (1110) [2022-11-03 03:47:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4265 states to 4265 states and 6735 transitions. [2022-11-03 03:47:34,689 INFO L78 Accepts]: Start accepts. Automaton has 4265 states and 6735 transitions. Word has length 90 [2022-11-03 03:47:34,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:34,689 INFO L495 AbstractCegarLoop]: Abstraction has 4265 states and 6735 transitions. [2022-11-03 03:47:34,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:47:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4265 states and 6735 transitions. [2022-11-03 03:47:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:47:34,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:34,693 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:47:34,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:47:34,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:34,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1021088406, now seen corresponding path program 1 times [2022-11-03 03:47:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:34,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946881197] [2022-11-03 03:47:34,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:34,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:35,086 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 03:47:35,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:35,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946881197] [2022-11-03 03:47:35,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946881197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:35,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:35,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:47:35,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046899745] [2022-11-03 03:47:35,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:35,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:47:35,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:35,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:47:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:35,089 INFO L87 Difference]: Start difference. First operand 4265 states and 6735 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 03:47:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:35,941 INFO L93 Difference]: Finished difference Result 4466 states and 7025 transitions. [2022-11-03 03:47:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:47:35,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 98 [2022-11-03 03:47:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:35,962 INFO L225 Difference]: With dead ends: 4466 [2022-11-03 03:47:35,962 INFO L226 Difference]: Without dead ends: 4451 [2022-11-03 03:47:35,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:47:35,966 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 587 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 2580 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:35,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 2580 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:47:35,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2022-11-03 03:47:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 4379. [2022-11-03 03:47:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 3117 states have (on average 1.5338466474173884) internal successors, (4781), 3270 states have internal predecessors, (4781), 969 states have call successors, (969), 223 states have call predecessors, (969), 292 states have return successors, (1151), 940 states have call predecessors, (1151), 964 states have call successors, (1151) [2022-11-03 03:47:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 6901 transitions. [2022-11-03 03:47:36,331 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 6901 transitions. Word has length 98 [2022-11-03 03:47:36,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:36,331 INFO L495 AbstractCegarLoop]: Abstraction has 4379 states and 6901 transitions. [2022-11-03 03:47:36,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 03:47:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 6901 transitions. [2022-11-03 03:47:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 03:47:36,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:36,335 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:47:36,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:47:36,336 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:36,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:36,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1760955271, now seen corresponding path program 1 times [2022-11-03 03:47:36,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:36,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459860999] [2022-11-03 03:47:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:36,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:47:37,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:37,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459860999] [2022-11-03 03:47:37,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459860999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:37,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:37,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 03:47:37,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272897920] [2022-11-03 03:47:37,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:37,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:47:37,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:37,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:47:37,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:47:37,670 INFO L87 Difference]: Start difference. First operand 4379 states and 6901 transitions. Second operand has 12 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 5 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-03 03:47:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:41,679 INFO L93 Difference]: Finished difference Result 5435 states and 8674 transitions. [2022-11-03 03:47:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 03:47:41,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 5 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 4 states have call successors, (19) Word has length 105 [2022-11-03 03:47:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:41,704 INFO L225 Difference]: With dead ends: 5435 [2022-11-03 03:47:41,704 INFO L226 Difference]: Without dead ends: 5150 [2022-11-03 03:47:41,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:47:41,712 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 1756 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 4177 mSolverCounterSat, 808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1822 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 4985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 808 IncrementalHoareTripleChecker+Valid, 4177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:41,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1822 Valid, 2378 Invalid, 4985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [808 Valid, 4177 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 03:47:41,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5150 states. [2022-11-03 03:47:42,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5150 to 4821. [2022-11-03 03:47:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4821 states, 3435 states have (on average 1.5304221251819505) internal successors, (5257), 3602 states have internal predecessors, (5257), 1041 states have call successors, (1041), 259 states have call predecessors, (1041), 344 states have return successors, (1262), 1014 states have call predecessors, (1262), 1036 states have call successors, (1262) [2022-11-03 03:47:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4821 states to 4821 states and 7560 transitions. [2022-11-03 03:47:42,199 INFO L78 Accepts]: Start accepts. Automaton has 4821 states and 7560 transitions. Word has length 105 [2022-11-03 03:47:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:42,200 INFO L495 AbstractCegarLoop]: Abstraction has 4821 states and 7560 transitions. [2022-11-03 03:47:42,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 5 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-03 03:47:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 4821 states and 7560 transitions. [2022-11-03 03:47:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 03:47:42,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:42,203 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 03:47:42,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:47:42,204 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash 555204384, now seen corresponding path program 1 times [2022-11-03 03:47:42,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:42,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997181361] [2022-11-03 03:47:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:42,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:47:42,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:42,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997181361] [2022-11-03 03:47:42,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997181361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:42,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:42,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:47:42,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85554637] [2022-11-03 03:47:42,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:42,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:42,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:42,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:47:42,539 INFO L87 Difference]: Start difference. First operand 4821 states and 7560 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:47:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:44,888 INFO L93 Difference]: Finished difference Result 13077 states and 20800 transitions. [2022-11-03 03:47:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:47:44,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 103 [2022-11-03 03:47:44,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:44,935 INFO L225 Difference]: With dead ends: 13077 [2022-11-03 03:47:44,935 INFO L226 Difference]: Without dead ends: 8288 [2022-11-03 03:47:44,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:44,959 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 1219 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:44,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 1329 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 03:47:44,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8288 states. [2022-11-03 03:47:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8288 to 7832. [2022-11-03 03:47:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7832 states, 5629 states have (on average 1.5301119204121514) internal successors, (8613), 5904 states have internal predecessors, (8613), 1644 states have call successors, (1644), 417 states have call predecessors, (1644), 558 states have return successors, (2084), 1590 states have call predecessors, (2084), 1639 states have call successors, (2084) [2022-11-03 03:47:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7832 states to 7832 states and 12341 transitions. [2022-11-03 03:47:45,970 INFO L78 Accepts]: Start accepts. Automaton has 7832 states and 12341 transitions. Word has length 103 [2022-11-03 03:47:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:45,971 INFO L495 AbstractCegarLoop]: Abstraction has 7832 states and 12341 transitions. [2022-11-03 03:47:45,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:47:45,972 INFO L276 IsEmpty]: Start isEmpty. Operand 7832 states and 12341 transitions. [2022-11-03 03:47:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 03:47:45,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:45,975 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] [2022-11-03 03:47:45,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:47:45,976 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:45,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1047443736, now seen corresponding path program 1 times [2022-11-03 03:47:45,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:45,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6406999] [2022-11-03 03:47:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:45,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:47:47,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:47,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6406999] [2022-11-03 03:47:47,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6406999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:47,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550107975] [2022-11-03 03:47:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:47,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:47,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:47,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:47,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:47:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:48,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 2086 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-03 03:47:48,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:47:49,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:49,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550107975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:49,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:49,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 21 [2022-11-03 03:47:49,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941126845] [2022-11-03 03:47:49,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:49,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:47:49,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:49,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:47:49,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:47:49,124 INFO L87 Difference]: Start difference. First operand 7832 states and 12341 transitions. Second operand has 12 states, 8 states have (on average 7.875) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-11-03 03:47:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:52,545 INFO L93 Difference]: Finished difference Result 15609 states and 24924 transitions. [2022-11-03 03:47:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:47:52,545 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 7.875) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 111 [2022-11-03 03:47:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:52,581 INFO L225 Difference]: With dead ends: 15609 [2022-11-03 03:47:52,582 INFO L226 Difference]: Without dead ends: 7800 [2022-11-03 03:47:52,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:47:52,607 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 729 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 3896 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 4267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 3896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:52,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1040 Invalid, 4267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 3896 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:47:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2022-11-03 03:47:53,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 7651. [2022-11-03 03:47:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7651 states, 5509 states have (on average 1.5196950444726811) internal successors, (8372), 5783 states have internal predecessors, (8372), 1583 states have call successors, (1583), 417 states have call predecessors, (1583), 558 states have return successors, (2024), 1530 states have call predecessors, (2024), 1579 states have call successors, (2024) [2022-11-03 03:47:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7651 states to 7651 states and 11979 transitions. [2022-11-03 03:47:53,459 INFO L78 Accepts]: Start accepts. Automaton has 7651 states and 11979 transitions. Word has length 111 [2022-11-03 03:47:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:53,462 INFO L495 AbstractCegarLoop]: Abstraction has 7651 states and 11979 transitions. [2022-11-03 03:47:53,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 7.875) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-11-03 03:47:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 7651 states and 11979 transitions. [2022-11-03 03:47:53,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 03:47:53,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:53,468 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-03 03:47:53,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:53,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:47:53,683 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:53,683 INFO L85 PathProgramCache]: Analyzing trace with hash 124641749, now seen corresponding path program 1 times [2022-11-03 03:47:53,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:53,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960222180] [2022-11-03 03:47:53,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:53,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:54,447 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 03:47:54,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:54,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960222180] [2022-11-03 03:47:54,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960222180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:54,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:54,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:47:54,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234213996] [2022-11-03 03:47:54,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:54,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:54,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:54,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:54,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:47:54,453 INFO L87 Difference]: Start difference. First operand 7651 states and 11979 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-03 03:47:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:55,631 INFO L93 Difference]: Finished difference Result 7893 states and 12419 transitions. [2022-11-03 03:47:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:55,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 109 [2022-11-03 03:47:55,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:55,674 INFO L225 Difference]: With dead ends: 7893 [2022-11-03 03:47:55,674 INFO L226 Difference]: Without dead ends: 7879 [2022-11-03 03:47:55,681 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 03:47:55,682 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 47 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:55,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1609 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:47:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2022-11-03 03:47:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 7677. [2022-11-03 03:47:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7677 states, 5535 states have (on average 1.5158084914182475) internal successors, (8390), 5809 states have internal predecessors, (8390), 1583 states have call successors, (1583), 417 states have call predecessors, (1583), 558 states have return successors, (2024), 1530 states have call predecessors, (2024), 1579 states have call successors, (2024) [2022-11-03 03:47:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7677 states to 7677 states and 11997 transitions. [2022-11-03 03:47:56,333 INFO L78 Accepts]: Start accepts. Automaton has 7677 states and 11997 transitions. Word has length 109 [2022-11-03 03:47:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:56,334 INFO L495 AbstractCegarLoop]: Abstraction has 7677 states and 11997 transitions. [2022-11-03 03:47:56,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-03 03:47:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 7677 states and 11997 transitions. [2022-11-03 03:47:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 03:47:56,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:56,339 INFO L195 NwaCegarLoop]: trace histogram [6, 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 03:47:56,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 03:47:56,340 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:56,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:56,340 INFO L85 PathProgramCache]: Analyzing trace with hash -897565642, now seen corresponding path program 1 times [2022-11-03 03:47:56,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:56,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987462670] [2022-11-03 03:47:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:56,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 03:48:00,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:00,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987462670] [2022-11-03 03:48:00,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987462670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:00,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980581243] [2022-11-03 03:48:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:00,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:00,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:00,019 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:00,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:48:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:00,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 2135 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-03 03:48:00,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:48:01,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:15,472 WARN L234 SmtUtils]: Spent 3.15m on a formula simplification. DAG size of input: 2881 DAG size of output: 101 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 03:54:24,787 WARN L234 SmtUtils]: Spent 3.13m on a formula simplification. DAG size of input: 2881 DAG size of output: 101 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 03:54:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 03:54:25,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980581243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:25,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [683915701] [2022-11-03 03:54:25,693 INFO L159 IcfgInterpreter]: Started Sifa with 110 locations of interest [2022-11-03 03:54:25,694 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:54:25,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:54:25,705 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:54:25,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:54:38,073 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 491 for LOIs [2022-11-03 03:54:38,417 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 592 for LOIs [2022-11-03 03:56:04,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:04,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:56:04,858 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 03:56:04,862 INFO L158 Benchmark]: Toolchain (without parser) took 536720.94ms. Allocated memory was 107.0MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 70.5MB in the beginning and 1.0GB in the end (delta: -973.3MB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2022-11-03 03:56:04,862 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 77.6MB. Free memory was 53.6MB in the beginning and 53.6MB in the end (delta: 27.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:56:04,863 INFO L158 Benchmark]: CACSL2BoogieTranslator took 913.83ms. Allocated memory is still 107.0MB. Free memory was 70.5MB in the beginning and 55.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 03:56:04,863 INFO L158 Benchmark]: Boogie Procedure Inliner took 139.26ms. Allocated memory is still 107.0MB. Free memory was 55.8MB in the beginning and 51.1MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:56:04,863 INFO L158 Benchmark]: Boogie Preprocessor took 76.71ms. Allocated memory is still 107.0MB. Free memory was 51.1MB in the beginning and 45.8MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:56:04,864 INFO L158 Benchmark]: RCFGBuilder took 2316.04ms. Allocated memory was 107.0MB in the beginning and 132.1MB in the end (delta: 25.2MB). Free memory was 45.8MB in the beginning and 61.2MB in the end (delta: -15.3MB). Peak memory consumption was 35.0MB. Max. memory is 16.1GB. [2022-11-03 03:56:04,864 INFO L158 Benchmark]: TraceAbstraction took 533268.93ms. Allocated memory was 132.1MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 60.1MB in the beginning and 1.0GB in the end (delta: -983.6MB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2022-11-03 03:56:04,866 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 77.6MB. Free memory was 53.6MB in the beginning and 53.6MB in the end (delta: 27.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 913.83ms. Allocated memory is still 107.0MB. Free memory was 70.5MB in the beginning and 55.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 139.26ms. Allocated memory is still 107.0MB. Free memory was 55.8MB in the beginning and 51.1MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 76.71ms. Allocated memory is still 107.0MB. Free memory was 51.1MB in the beginning and 45.8MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 2316.04ms. Allocated memory was 107.0MB in the beginning and 132.1MB in the end (delta: 25.2MB). Free memory was 45.8MB in the beginning and 61.2MB in the end (delta: -15.3MB). Peak memory consumption was 35.0MB. Max. memory is 16.1GB. * TraceAbstraction took 533268.93ms. Allocated memory was 132.1MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 60.1MB in the beginning and 1.0GB in the end (delta: -983.6MB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 03:56:04,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/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_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/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 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 --- 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 03:56:07,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:56:07,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:56:07,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:56:07,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:56:07,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:56:07,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:56:07,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:56:07,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:56:07,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:56:07,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:56:07,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:56:07,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:56:07,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:56:07,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:56:07,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:56:07,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:56:07,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:56:07,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:56:07,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:56:07,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:56:07,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:56:07,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:56:07,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:56:07,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:56:07,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:56:07,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:56:07,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:56:07,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:56:07,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:56:07,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:56:07,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:56:07,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:56:07,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:56:07,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:56:07,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:56:07,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:56:07,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:56:07,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:56:07,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:56:07,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:56:07,278 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 03:56:07,309 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:56:07,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:56:07,310 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:56:07,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:56:07,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:56:07,312 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:56:07,312 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:56:07,312 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:56:07,312 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:56:07,313 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:56:07,313 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:56:07,313 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:56:07,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:56:07,314 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:56:07,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:56:07,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:56:07,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:56:07,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:56:07,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:56:07,316 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:56:07,316 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:56:07,317 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:56:07,317 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:56:07,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:56:07,318 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:56:07,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:56:07,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:56:07,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:56:07,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:56:07,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:56:07,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:56:07,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:56:07,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:56:07,320 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:56:07,321 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:07,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:56:07,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:56:07,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:56:07,322 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_729da17c-60b4-4954-bd60-c9a35eee3791/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 [2022-11-03 03:56:07,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:56:07,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:56:07,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:56:07,730 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:56:07,731 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:56:07,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2022-11-03 03:56:07,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/data/a65afb206/6a11162a1482463795e657c78a05ee6b/FLAG37aca04f6 [2022-11-03 03:56:08,547 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:56:08,548 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2022-11-03 03:56:08,574 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/data/a65afb206/6a11162a1482463795e657c78a05ee6b/FLAG37aca04f6 [2022-11-03 03:56:08,681 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/data/a65afb206/6a11162a1482463795e657c78a05ee6b [2022-11-03 03:56:08,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:56:08,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:56:08,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:56:08,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:56:08,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:56:08,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:56:08" (1/1) ... [2022-11-03 03:56:08,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e35159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:08, skipping insertion in model container [2022-11-03 03:56:08,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:56:08" (1/1) ... [2022-11-03 03:56:08,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:56:08,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:56:09,239 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_729da17c-60b4-4954-bd60-c9a35eee3791/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2022-11-03 03:56:09,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:09,279 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 03:56:09,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:56:09,427 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_729da17c-60b4-4954-bd60-c9a35eee3791/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2022-11-03 03:56:09,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:09,464 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:56:09,586 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_729da17c-60b4-4954-bd60-c9a35eee3791/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2022-11-03 03:56:09,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:09,623 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:56:09,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09 WrapperNode [2022-11-03 03:56:09,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:56:09,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:56:09,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:56:09,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:56:09,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09" (1/1) ... [2022-11-03 03:56:09,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09" (1/1) ... [2022-11-03 03:56:09,698 INFO L138 Inliner]: procedures = 95, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 806 [2022-11-03 03:56:09,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:56:09,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:56:09,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:56:09,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:56:09,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09" (1/1) ... [2022-11-03 03:56:09,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09" (1/1) ... [2022-11-03 03:56:09,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09" (1/1) ... [2022-11-03 03:56:09,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09" (1/1) ... [2022-11-03 03:56:09,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09" (1/1) ... [2022-11-03 03:56:09,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09" (1/1) ... [2022-11-03 03:56:09,784 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09" (1/1) ... [2022-11-03 03:56:09,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09" (1/1) ... [2022-11-03 03:56:09,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:56:09,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:56:09,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:56:09,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:56:09,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09" (1/1) ... [2022-11-03 03:56:09,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:56:09,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:09,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:56:09,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:56:09,890 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-03 03:56:09,890 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-03 03:56:09,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:56:09,891 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 03:56:09,891 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 03:56:09,891 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:56:09,891 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:56:09,891 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:56:09,892 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:56:09,892 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:56:09,892 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:56:09,892 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:56:09,892 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:56:09,892 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:56:09,893 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:56:09,893 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:56:09,893 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:56:09,893 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 03:56:09,893 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 03:56:09,893 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 03:56:09,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 03:56:09,894 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:56:09,894 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:56:09,894 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:56:09,894 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:56:09,895 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:56:09,895 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:56:09,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 03:56:09,895 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:56:09,896 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:56:09,896 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:56:09,896 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:56:09,896 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2022-11-03 03:56:09,897 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2022-11-03 03:56:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:56:09,897 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:56:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:56:09,897 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:56:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:56:09,898 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:56:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:56:09,898 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:56:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:56:09,898 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:56:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:56:09,900 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:56:09,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:56:09,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:56:09,902 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:56:09,902 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:56:10,144 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:56:10,146 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:56:11,385 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:56:11,419 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:56:11,421 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:56:11,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:11 BoogieIcfgContainer [2022-11-03 03:56:11,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:56:11,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:56:11,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:56:11,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:56:11,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:56:08" (1/3) ... [2022-11-03 03:56:11,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1c7019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:11, skipping insertion in model container [2022-11-03 03:56:11,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:09" (2/3) ... [2022-11-03 03:56:11,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1c7019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:11, skipping insertion in model container [2022-11-03 03:56:11,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:11" (3/3) ... [2022-11-03 03:56:11,437 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product26.cil.c [2022-11-03 03:56:11,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:56:11,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:56:11,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:56:11,553 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;@79c5b8f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:56:11,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:56:11,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 557 states, 438 states have (on average 1.7031963470319635) internal successors, (746), 461 states have internal predecessors, (746), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 03:56:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 03:56:11,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:11,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:11,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:11,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash -452819156, now seen corresponding path program 1 times [2022-11-03 03:56:11,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:11,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861670953] [2022-11-03 03:56:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:11,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:11,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:11,603 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:11,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:56:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:12,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 03:56:12,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:56:12,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:12,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:12,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861670953] [2022-11-03 03:56:12,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861670953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:12,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:12,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:56:12,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18089248] [2022-11-03 03:56:12,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:12,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:56:12,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:12,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:56:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:56:12,363 INFO L87 Difference]: Start difference. First operand has 557 states, 438 states have (on average 1.7031963470319635) internal successors, (746), 461 states have internal predecessors, (746), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 03:56:12,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:12,457 INFO L93 Difference]: Finished difference Result 578 states and 964 transitions. [2022-11-03 03:56:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:56:12,468 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 79 [2022-11-03 03:56:12,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:12,501 INFO L225 Difference]: With dead ends: 578 [2022-11-03 03:56:12,501 INFO L226 Difference]: Without dead ends: 549 [2022-11-03 03:56:12,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:56:12,517 INFO L413 NwaCegarLoop]: 925 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:12,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:12,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-11-03 03:56:12,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2022-11-03 03:56:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 432 states have (on average 1.7013888888888888) internal successors, (735), 453 states have internal predecessors, (735), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 918 transitions. [2022-11-03 03:56:12,616 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 918 transitions. Word has length 79 [2022-11-03 03:56:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:12,618 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 918 transitions. [2022-11-03 03:56:12,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-03 03:56:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 918 transitions. [2022-11-03 03:56:12,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 03:56:12,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:12,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:12,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:12,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:12,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:12,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:12,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1489058496, now seen corresponding path program 1 times [2022-11-03 03:56:12,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:12,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174202146] [2022-11-03 03:56:12,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:12,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:12,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:12,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:12,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:56:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:13,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:56:13,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:56:13,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:13,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:13,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174202146] [2022-11-03 03:56:13,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174202146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:13,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:13,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:13,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984349487] [2022-11-03 03:56:13,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:13,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:13,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:13,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:13,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:13,523 INFO L87 Difference]: Start difference. First operand 549 states and 918 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:13,717 INFO L93 Difference]: Finished difference Result 1089 states and 1828 transitions. [2022-11-03 03:56:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:13,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 81 [2022-11-03 03:56:13,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:13,728 INFO L225 Difference]: With dead ends: 1089 [2022-11-03 03:56:13,728 INFO L226 Difference]: Without dead ends: 549 [2022-11-03 03:56:13,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 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 03:56:13,737 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 14 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:13,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2705 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-11-03 03:56:13,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2022-11-03 03:56:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 432 states have (on average 1.6990740740740742) internal successors, (734), 453 states have internal predecessors, (734), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 917 transitions. [2022-11-03 03:56:13,797 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 917 transitions. Word has length 81 [2022-11-03 03:56:13,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:13,797 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 917 transitions. [2022-11-03 03:56:13,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 917 transitions. [2022-11-03 03:56:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 03:56:13,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:13,803 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:56:13,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:14,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:14,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1789740480, now seen corresponding path program 1 times [2022-11-03 03:56:14,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:14,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032269140] [2022-11-03 03:56:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:14,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:14,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:14,022 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:14,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:56:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:14,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:56:14,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:56:14,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:14,557 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:14,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032269140] [2022-11-03 03:56:14,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032269140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:14,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:14,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:14,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663079113] [2022-11-03 03:56:14,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:14,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:14,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:14,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:14,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:14,560 INFO L87 Difference]: Start difference. First operand 549 states and 917 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:14,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:14,635 INFO L93 Difference]: Finished difference Result 1089 states and 1826 transitions. [2022-11-03 03:56:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:14,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2022-11-03 03:56:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:14,641 INFO L225 Difference]: With dead ends: 1089 [2022-11-03 03:56:14,642 INFO L226 Difference]: Without dead ends: 549 [2022-11-03 03:56:14,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 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 03:56:14,645 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 12 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:14,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2705 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-11-03 03:56:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2022-11-03 03:56:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 432 states have (on average 1.6967592592592593) internal successors, (733), 453 states have internal predecessors, (733), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 916 transitions. [2022-11-03 03:56:14,682 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 916 transitions. Word has length 83 [2022-11-03 03:56:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:14,683 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 916 transitions. [2022-11-03 03:56:14,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 916 transitions. [2022-11-03 03:56:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 03:56:14,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:14,689 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:56:14,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:14,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:14,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:14,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2051322496, now seen corresponding path program 1 times [2022-11-03 03:56:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:14,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873576483] [2022-11-03 03:56:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:14,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:14,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:14,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:14,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:56:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:15,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:56:15,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:15,405 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 03:56:15,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:15,405 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:15,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873576483] [2022-11-03 03:56:15,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873576483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:15,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:15,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:15,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48015090] [2022-11-03 03:56:15,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:15,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:15,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:15,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:15,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:15,408 INFO L87 Difference]: Start difference. First operand 549 states and 916 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:15,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:15,505 INFO L93 Difference]: Finished difference Result 1093 states and 1829 transitions. [2022-11-03 03:56:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:15,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2022-11-03 03:56:15,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:15,511 INFO L225 Difference]: With dead ends: 1093 [2022-11-03 03:56:15,511 INFO L226 Difference]: Without dead ends: 555 [2022-11-03 03:56:15,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 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 03:56:15,515 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 13 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:15,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2705 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:15,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-03 03:56:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2022-11-03 03:56:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 437 states have (on average 1.688787185354691) internal successors, (738), 458 states have internal predecessors, (738), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 921 transitions. [2022-11-03 03:56:15,540 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 921 transitions. Word has length 85 [2022-11-03 03:56:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:15,541 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 921 transitions. [2022-11-03 03:56:15,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 921 transitions. [2022-11-03 03:56:15,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:56:15,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:15,543 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:56:15,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:15,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:15,763 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash -45070625, now seen corresponding path program 1 times [2022-11-03 03:56:15,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:15,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020405127] [2022-11-03 03:56:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:15,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:15,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:15,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:15,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:56:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:16,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:56:16,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:16,271 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 03:56:16,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:16,272 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:16,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020405127] [2022-11-03 03:56:16,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020405127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:16,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:16,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:16,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672830274] [2022-11-03 03:56:16,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:16,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:16,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:16,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:16,275 INFO L87 Difference]: Start difference. First operand 555 states and 921 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:16,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:16,343 INFO L93 Difference]: Finished difference Result 1092 states and 1820 transitions. [2022-11-03 03:56:16,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:16,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2022-11-03 03:56:16,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:16,348 INFO L225 Difference]: With dead ends: 1092 [2022-11-03 03:56:16,349 INFO L226 Difference]: Without dead ends: 555 [2022-11-03 03:56:16,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 03:56:16,352 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 8 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2706 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:16,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2706 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:16,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-03 03:56:16,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2022-11-03 03:56:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 437 states have (on average 1.6864988558352403) internal successors, (737), 458 states have internal predecessors, (737), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 920 transitions. [2022-11-03 03:56:16,377 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 920 transitions. Word has length 86 [2022-11-03 03:56:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:16,377 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 920 transitions. [2022-11-03 03:56:16,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 920 transitions. [2022-11-03 03:56:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 03:56:16,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:16,380 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:56:16,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:16,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:16,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:16,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash 84493924, now seen corresponding path program 1 times [2022-11-03 03:56:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:16,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414548027] [2022-11-03 03:56:16,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:16,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:16,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:16,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:16,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:56:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:17,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:56:17,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:17,068 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 03:56:17,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:17,069 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:17,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414548027] [2022-11-03 03:56:17,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414548027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:17,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:17,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:17,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719065271] [2022-11-03 03:56:17,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:17,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:17,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:17,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:17,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:17,072 INFO L87 Difference]: Start difference. First operand 555 states and 920 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:17,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:17,136 INFO L93 Difference]: Finished difference Result 1092 states and 1819 transitions. [2022-11-03 03:56:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:17,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2022-11-03 03:56:17,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:17,142 INFO L225 Difference]: With dead ends: 1092 [2022-11-03 03:56:17,142 INFO L226 Difference]: Without dead ends: 555 [2022-11-03 03:56:17,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 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 03:56:17,145 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 6 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2706 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:17,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2706 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-03 03:56:17,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2022-11-03 03:56:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 437 states have (on average 1.6842105263157894) internal successors, (736), 458 states have internal predecessors, (736), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 919 transitions. [2022-11-03 03:56:17,170 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 919 transitions. Word has length 87 [2022-11-03 03:56:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:17,170 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 919 transitions. [2022-11-03 03:56:17,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:17,171 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 919 transitions. [2022-11-03 03:56:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 03:56:17,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:17,173 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:56:17,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:17,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:17,387 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:17,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2128673661, now seen corresponding path program 1 times [2022-11-03 03:56:17,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:17,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463242227] [2022-11-03 03:56:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:17,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:17,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:17,391 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:17,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:56:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:17,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:56:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:17,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:17,939 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:17,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463242227] [2022-11-03 03:56:17,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463242227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:17,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:17,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:17,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292579240] [2022-11-03 03:56:17,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:17,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:17,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:17,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:17,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:17,941 INFO L87 Difference]: Start difference. First operand 555 states and 919 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:18,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:18,138 INFO L93 Difference]: Finished difference Result 1109 states and 1847 transitions. [2022-11-03 03:56:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:18,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2022-11-03 03:56:18,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:18,145 INFO L225 Difference]: With dead ends: 1109 [2022-11-03 03:56:18,145 INFO L226 Difference]: Without dead ends: 576 [2022-11-03 03:56:18,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:18,148 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 148 mSDsluCounter, 4404 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5307 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:18,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 5307 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-11-03 03:56:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2022-11-03 03:56:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 453 states have (on average 1.6821192052980132) internal successors, (762), 476 states have internal predecessors, (762), 95 states have call successors, (95), 24 states have call predecessors, (95), 25 states have return successors, (93), 87 states have call predecessors, (93), 90 states have call successors, (93) [2022-11-03 03:56:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 950 transitions. [2022-11-03 03:56:18,173 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 950 transitions. Word has length 88 [2022-11-03 03:56:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:18,174 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 950 transitions. [2022-11-03 03:56:18,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 950 transitions. [2022-11-03 03:56:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 03:56:18,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:18,176 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:56:18,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:18,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:18,403 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:18,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1682618308, now seen corresponding path program 1 times [2022-11-03 03:56:18,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:18,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666025450] [2022-11-03 03:56:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:18,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:18,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:18,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:18,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:56:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:18,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:56:18,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:18,813 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 03:56:18,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:18,814 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666025450] [2022-11-03 03:56:18,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666025450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:18,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:18,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:18,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444392322] [2022-11-03 03:56:18,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:18,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:18,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:18,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:18,816 INFO L87 Difference]: Start difference. First operand 574 states and 950 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:18,898 INFO L93 Difference]: Finished difference Result 1122 states and 1869 transitions. [2022-11-03 03:56:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:18,899 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), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2022-11-03 03:56:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:18,905 INFO L225 Difference]: With dead ends: 1122 [2022-11-03 03:56:18,905 INFO L226 Difference]: Without dead ends: 570 [2022-11-03 03:56:18,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 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 03:56:18,909 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 8 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:18,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2705 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-11-03 03:56:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2022-11-03 03:56:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 451 states have (on average 1.6829268292682926) internal successors, (759), 473 states have internal predecessors, (759), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2022-11-03 03:56:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 943 transitions. [2022-11-03 03:56:18,939 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 943 transitions. Word has length 88 [2022-11-03 03:56:18,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:18,939 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 943 transitions. [2022-11-03 03:56:18,940 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), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 943 transitions. [2022-11-03 03:56:18,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 03:56:18,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:18,942 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:18,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:19,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:19,161 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2069966294, now seen corresponding path program 1 times [2022-11-03 03:56:19,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:19,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550979434] [2022-11-03 03:56:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:19,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:19,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:19,164 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:19,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:56:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:19,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:56:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:19,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:19,581 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:19,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550979434] [2022-11-03 03:56:19,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550979434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:19,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:19,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:19,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255491934] [2022-11-03 03:56:19,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:19,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:19,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:19,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:19,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:19,584 INFO L87 Difference]: Start difference. First operand 570 states and 943 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:19,764 INFO L93 Difference]: Finished difference Result 1148 states and 1914 transitions. [2022-11-03 03:56:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2022-11-03 03:56:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:19,772 INFO L225 Difference]: With dead ends: 1148 [2022-11-03 03:56:19,772 INFO L226 Difference]: Without dead ends: 570 [2022-11-03 03:56:19,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 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 03:56:19,775 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 134 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:19,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 2513 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:19,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-11-03 03:56:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2022-11-03 03:56:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 451 states have (on average 1.671840354767184) internal successors, (754), 473 states have internal predecessors, (754), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2022-11-03 03:56:19,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 938 transitions. [2022-11-03 03:56:19,798 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 938 transitions. Word has length 89 [2022-11-03 03:56:19,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:19,798 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 938 transitions. [2022-11-03 03:56:19,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:19,799 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 938 transitions. [2022-11-03 03:56:19,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 03:56:19,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:19,800 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:19,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:20,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:20,021 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash -399760830, now seen corresponding path program 1 times [2022-11-03 03:56:20,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:20,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049388781] [2022-11-03 03:56:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:20,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:20,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:20,023 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:20,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:56:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:20,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:56:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:20,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:20,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:20,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049388781] [2022-11-03 03:56:20,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049388781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:20,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:20,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:20,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813873843] [2022-11-03 03:56:20,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:20,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:20,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:20,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:20,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:20,467 INFO L87 Difference]: Start difference. First operand 570 states and 938 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:20,641 INFO L93 Difference]: Finished difference Result 1148 states and 1904 transitions. [2022-11-03 03:56:20,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:20,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2022-11-03 03:56:20,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:20,647 INFO L225 Difference]: With dead ends: 1148 [2022-11-03 03:56:20,647 INFO L226 Difference]: Without dead ends: 570 [2022-11-03 03:56:20,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 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 03:56:20,651 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 128 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:20,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 2513 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-11-03 03:56:20,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2022-11-03 03:56:20,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 451 states have (on average 1.6607538802660753) internal successors, (749), 473 states have internal predecessors, (749), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2022-11-03 03:56:20,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 933 transitions. [2022-11-03 03:56:20,671 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 933 transitions. Word has length 91 [2022-11-03 03:56:20,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:20,672 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 933 transitions. [2022-11-03 03:56:20,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 933 transitions. [2022-11-03 03:56:20,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 03:56:20,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:20,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:20,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:20,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:20,895 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:20,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:20,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1393568394, now seen corresponding path program 1 times [2022-11-03 03:56:20,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:20,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229165014] [2022-11-03 03:56:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:20,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:20,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:20,897 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:20,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:56:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:21,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:56:21,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:21,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:21,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:21,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229165014] [2022-11-03 03:56:21,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229165014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:21,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:21,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:21,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991462204] [2022-11-03 03:56:21,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:21,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:21,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:21,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:21,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:21,335 INFO L87 Difference]: Start difference. First operand 570 states and 933 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:21,524 INFO L93 Difference]: Finished difference Result 1169 states and 1925 transitions. [2022-11-03 03:56:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:21,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2022-11-03 03:56:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:21,530 INFO L225 Difference]: With dead ends: 1169 [2022-11-03 03:56:21,530 INFO L226 Difference]: Without dead ends: 600 [2022-11-03 03:56:21,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 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 03:56:21,536 INFO L413 NwaCegarLoop]: 861 mSDtfsCounter, 143 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:21,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 2523 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-11-03 03:56:21,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 585. [2022-11-03 03:56:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 466 states have (on average 1.6394849785407726) internal successors, (764), 487 states have internal predecessors, (764), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 947 transitions. [2022-11-03 03:56:21,559 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 947 transitions. Word has length 93 [2022-11-03 03:56:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:21,560 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 947 transitions. [2022-11-03 03:56:21,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 947 transitions. [2022-11-03 03:56:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 03:56:21,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:21,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:21,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:21,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:21,783 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:21,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2004653834, now seen corresponding path program 1 times [2022-11-03 03:56:21,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:21,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449011289] [2022-11-03 03:56:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:21,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:21,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:21,785 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:21,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:56:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:22,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:56:22,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:22,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:22,308 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449011289] [2022-11-03 03:56:22,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449011289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:22,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:22,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:22,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069366448] [2022-11-03 03:56:22,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:22,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:22,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:22,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:22,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:22,311 INFO L87 Difference]: Start difference. First operand 585 states and 947 transitions. Second operand has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:22,460 INFO L93 Difference]: Finished difference Result 1133 states and 1846 transitions. [2022-11-03 03:56:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:22,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2022-11-03 03:56:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:22,466 INFO L225 Difference]: With dead ends: 1133 [2022-11-03 03:56:22,467 INFO L226 Difference]: Without dead ends: 579 [2022-11-03 03:56:22,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:22,470 INFO L413 NwaCegarLoop]: 906 mSDtfsCounter, 131 mSDsluCounter, 4369 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5275 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:22,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 5275 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-11-03 03:56:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 564. [2022-11-03 03:56:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 445 states have (on average 1.6337078651685393) internal successors, (727), 466 states have internal predecessors, (727), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 910 transitions. [2022-11-03 03:56:22,491 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 910 transitions. Word has length 93 [2022-11-03 03:56:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:22,491 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 910 transitions. [2022-11-03 03:56:22,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 910 transitions. [2022-11-03 03:56:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 03:56:22,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:22,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:22,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:22,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:22,713 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:22,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:22,714 INFO L85 PathProgramCache]: Analyzing trace with hash 776975392, now seen corresponding path program 1 times [2022-11-03 03:56:22,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:22,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280308000] [2022-11-03 03:56:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:22,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:22,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:22,716 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:22,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:56:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:23,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:56:23,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:23,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:23,221 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:23,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280308000] [2022-11-03 03:56:23,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280308000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:23,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:23,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:23,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207237879] [2022-11-03 03:56:23,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:23,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:23,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:23,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:23,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:23,223 INFO L87 Difference]: Start difference. First operand 564 states and 910 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:23,345 INFO L93 Difference]: Finished difference Result 1097 states and 1784 transitions. [2022-11-03 03:56:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:23,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2022-11-03 03:56:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:23,351 INFO L225 Difference]: With dead ends: 1097 [2022-11-03 03:56:23,351 INFO L226 Difference]: Without dead ends: 564 [2022-11-03 03:56:23,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 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 03:56:23,355 INFO L413 NwaCegarLoop]: 875 mSDtfsCounter, 69 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:23,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2537 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-03 03:56:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2022-11-03 03:56:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 445 states have (on average 1.6314606741573034) internal successors, (726), 466 states have internal predecessors, (726), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 909 transitions. [2022-11-03 03:56:23,374 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 909 transitions. Word has length 94 [2022-11-03 03:56:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:23,374 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 909 transitions. [2022-11-03 03:56:23,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 909 transitions. [2022-11-03 03:56:23,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 03:56:23,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:23,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:23,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:23,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:23,591 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:23,591 INFO L85 PathProgramCache]: Analyzing trace with hash -338078895, now seen corresponding path program 1 times [2022-11-03 03:56:23,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:23,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989993900] [2022-11-03 03:56:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:23,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:23,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:23,593 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:23,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:56:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:24,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:56:24,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:24,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:24,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989993900] [2022-11-03 03:56:24,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989993900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:24,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:24,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:24,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133467175] [2022-11-03 03:56:24,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:24,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:24,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:24,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:24,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:24,086 INFO L87 Difference]: Start difference. First operand 564 states and 909 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:24,190 INFO L93 Difference]: Finished difference Result 1097 states and 1783 transitions. [2022-11-03 03:56:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:24,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 95 [2022-11-03 03:56:24,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:24,196 INFO L225 Difference]: With dead ends: 1097 [2022-11-03 03:56:24,196 INFO L226 Difference]: Without dead ends: 564 [2022-11-03 03:56:24,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 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 03:56:24,199 INFO L413 NwaCegarLoop]: 875 mSDtfsCounter, 67 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:24,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 2537 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-03 03:56:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2022-11-03 03:56:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 445 states have (on average 1.6292134831460674) internal successors, (725), 466 states have internal predecessors, (725), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 908 transitions. [2022-11-03 03:56:24,219 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 908 transitions. Word has length 95 [2022-11-03 03:56:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:24,219 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 908 transitions. [2022-11-03 03:56:24,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 908 transitions. [2022-11-03 03:56:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-03 03:56:24,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:24,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:24,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:24,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:24,435 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:24,435 INFO L85 PathProgramCache]: Analyzing trace with hash -227458341, now seen corresponding path program 1 times [2022-11-03 03:56:24,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:24,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578555330] [2022-11-03 03:56:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:24,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:24,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:24,437 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:24,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:56:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:24,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:56:24,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:24,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:24,922 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:24,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578555330] [2022-11-03 03:56:24,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578555330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:24,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:24,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:56:24,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239612356] [2022-11-03 03:56:24,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:24,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:56:24,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:24,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:56:24,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:24,924 INFO L87 Difference]: Start difference. First operand 564 states and 908 transitions. Second operand has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:25,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:25,153 INFO L93 Difference]: Finished difference Result 1102 states and 1790 transitions. [2022-11-03 03:56:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:56:25,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2022-11-03 03:56:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:25,159 INFO L225 Difference]: With dead ends: 1102 [2022-11-03 03:56:25,159 INFO L226 Difference]: Without dead ends: 575 [2022-11-03 03:56:25,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:56:25,162 INFO L413 NwaCegarLoop]: 850 mSDtfsCounter, 109 mSDsluCounter, 5032 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5882 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:25,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 5882 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:56:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-03 03:56:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 566. [2022-11-03 03:56:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 447 states have (on average 1.6241610738255035) internal successors, (726), 468 states have internal predecessors, (726), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 909 transitions. [2022-11-03 03:56:25,183 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 909 transitions. Word has length 96 [2022-11-03 03:56:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:25,183 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 909 transitions. [2022-11-03 03:56:25,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 909 transitions. [2022-11-03 03:56:25,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 03:56:25,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:25,185 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:25,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:25,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:25,398 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:25,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1219436964, now seen corresponding path program 1 times [2022-11-03 03:56:25,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:25,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998407213] [2022-11-03 03:56:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:25,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:25,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:25,401 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:25,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:56:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:25,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:56:25,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:25,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:25,889 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:25,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998407213] [2022-11-03 03:56:25,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998407213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:25,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:25,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:56:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256829160] [2022-11-03 03:56:25,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:25,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:56:25,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:56:25,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:25,892 INFO L87 Difference]: Start difference. First operand 566 states and 909 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:26,119 INFO L93 Difference]: Finished difference Result 1094 states and 1771 transitions. [2022-11-03 03:56:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:56:26,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2022-11-03 03:56:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:26,124 INFO L225 Difference]: With dead ends: 1094 [2022-11-03 03:56:26,125 INFO L226 Difference]: Without dead ends: 571 [2022-11-03 03:56:26,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:56:26,128 INFO L413 NwaCegarLoop]: 852 mSDtfsCounter, 77 mSDsluCounter, 5038 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5890 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:26,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 5890 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:56:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-11-03 03:56:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 568. [2022-11-03 03:56:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 449 states have (on average 1.6191536748329622) internal successors, (727), 470 states have internal predecessors, (727), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 910 transitions. [2022-11-03 03:56:26,148 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 910 transitions. Word has length 97 [2022-11-03 03:56:26,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:26,149 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 910 transitions. [2022-11-03 03:56:26,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:26,149 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 910 transitions. [2022-11-03 03:56:26,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:56:26,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:26,151 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:26,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:26,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:26,369 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:26,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2038420421, now seen corresponding path program 1 times [2022-11-03 03:56:26,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:26,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531059109] [2022-11-03 03:56:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:26,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:26,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:26,372 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:26,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:56:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:26,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:56:26,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:56:26,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:26,843 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:26,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531059109] [2022-11-03 03:56:26,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531059109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:26,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:26,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:26,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821354332] [2022-11-03 03:56:26,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:26,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:26,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:26,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:26,845 INFO L87 Difference]: Start difference. First operand 568 states and 910 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:26,990 INFO L93 Difference]: Finished difference Result 1040 states and 1698 transitions. [2022-11-03 03:56:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 98 [2022-11-03 03:56:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:26,995 INFO L225 Difference]: With dead ends: 1040 [2022-11-03 03:56:26,995 INFO L226 Difference]: Without dead ends: 561 [2022-11-03 03:56:26,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:26,998 INFO L413 NwaCegarLoop]: 864 mSDtfsCounter, 55 mSDsluCounter, 4249 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 5113 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:26,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 5113 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-11-03 03:56:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2022-11-03 03:56:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 442 states have (on average 1.6266968325791855) internal successors, (719), 463 states have internal predecessors, (719), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:27,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 902 transitions. [2022-11-03 03:56:27,031 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 902 transitions. Word has length 98 [2022-11-03 03:56:27,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:27,031 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 902 transitions. [2022-11-03 03:56:27,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:27,032 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 902 transitions. [2022-11-03 03:56:27,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 03:56:27,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:27,034 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-11-03 03:56:27,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:27,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:27,250 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:27,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1649884760, now seen corresponding path program 1 times [2022-11-03 03:56:27,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:27,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693071393] [2022-11-03 03:56:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:27,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:27,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:27,252 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:27,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:56:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:27,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:56:27,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:56:27,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:27,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:27,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693071393] [2022-11-03 03:56:27,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693071393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:27,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:27,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:27,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971870689] [2022-11-03 03:56:27,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:27,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:27,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:27,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:27,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:27,749 INFO L87 Difference]: Start difference. First operand 561 states and 902 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:27,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:27,894 INFO L93 Difference]: Finished difference Result 1045 states and 1712 transitions. [2022-11-03 03:56:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:27,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 99 [2022-11-03 03:56:27,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:27,898 INFO L225 Difference]: With dead ends: 1045 [2022-11-03 03:56:27,899 INFO L226 Difference]: Without dead ends: 558 [2022-11-03 03:56:27,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:27,902 INFO L413 NwaCegarLoop]: 856 mSDtfsCounter, 97 mSDsluCounter, 4217 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 5073 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:27,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 5073 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-11-03 03:56:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2022-11-03 03:56:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 439 states have (on average 1.6264236902050113) internal successors, (714), 460 states have internal predecessors, (714), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 897 transitions. [2022-11-03 03:56:27,920 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 897 transitions. Word has length 99 [2022-11-03 03:56:27,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:27,921 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 897 transitions. [2022-11-03 03:56:27,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 897 transitions. [2022-11-03 03:56:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 03:56:27,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:27,923 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:27,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:28,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:28,152 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:28,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:28,152 INFO L85 PathProgramCache]: Analyzing trace with hash 488783400, now seen corresponding path program 1 times [2022-11-03 03:56:28,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:28,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845614745] [2022-11-03 03:56:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:28,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:28,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:28,154 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:28,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:56:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:28,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:56:28,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:56:28,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:28,690 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:28,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845614745] [2022-11-03 03:56:28,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845614745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:28,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:28,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:28,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553347525] [2022-11-03 03:56:28,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:28,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:28,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:28,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:28,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:28,692 INFO L87 Difference]: Start difference. First operand 558 states and 897 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:28,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:28,822 INFO L93 Difference]: Finished difference Result 1042 states and 1707 transitions. [2022-11-03 03:56:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:28,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 99 [2022-11-03 03:56:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:28,826 INFO L225 Difference]: With dead ends: 1042 [2022-11-03 03:56:28,827 INFO L226 Difference]: Without dead ends: 550 [2022-11-03 03:56:28,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:28,829 INFO L413 NwaCegarLoop]: 855 mSDtfsCounter, 105 mSDsluCounter, 4208 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 5063 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:28,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 5063 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-11-03 03:56:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2022-11-03 03:56:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 431 states have (on average 1.631090487238979) internal successors, (703), 452 states have internal predecessors, (703), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 886 transitions. [2022-11-03 03:56:28,847 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 886 transitions. Word has length 99 [2022-11-03 03:56:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:28,847 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 886 transitions. [2022-11-03 03:56:28,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 886 transitions. [2022-11-03 03:56:28,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 03:56:28,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:28,849 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:28,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:29,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:29,063 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:29,063 INFO L85 PathProgramCache]: Analyzing trace with hash -987521975, now seen corresponding path program 1 times [2022-11-03 03:56:29,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:29,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163528301] [2022-11-03 03:56:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:29,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:29,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:29,065 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:29,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 03:56:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:29,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:56:29,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:56:29,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:29,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:29,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163528301] [2022-11-03 03:56:29,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163528301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:29,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:29,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:56:29,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283630463] [2022-11-03 03:56:29,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:29,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:56:29,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:29,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:56:29,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:29,556 INFO L87 Difference]: Start difference. First operand 550 states and 886 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:29,737 INFO L93 Difference]: Finished difference Result 1028 states and 1685 transitions. [2022-11-03 03:56:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:29,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 100 [2022-11-03 03:56:29,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:29,742 INFO L225 Difference]: With dead ends: 1028 [2022-11-03 03:56:29,742 INFO L226 Difference]: Without dead ends: 550 [2022-11-03 03:56:29,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:56:29,745 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 67 mSDsluCounter, 5016 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 5867 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:29,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 5867 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-11-03 03:56:29,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2022-11-03 03:56:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 431 states have (on average 1.62877030162413) internal successors, (702), 452 states have internal predecessors, (702), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:29,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 885 transitions. [2022-11-03 03:56:29,791 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 885 transitions. Word has length 100 [2022-11-03 03:56:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:29,791 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 885 transitions. [2022-11-03 03:56:29,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 885 transitions. [2022-11-03 03:56:29,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 03:56:29,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:29,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:29,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:30,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:30,015 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:30,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1877192378, now seen corresponding path program 1 times [2022-11-03 03:56:30,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:30,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85325916] [2022-11-03 03:56:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:30,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:30,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:30,017 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:30,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:56:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:30,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:56:30,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:56:30,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:30,557 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:30,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85325916] [2022-11-03 03:56:30,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85325916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:30,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:30,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:56:30,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733096866] [2022-11-03 03:56:30,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:30,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:56:30,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:30,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:56:30,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:30,561 INFO L87 Difference]: Start difference. First operand 550 states and 885 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:30,750 INFO L93 Difference]: Finished difference Result 1072 states and 1742 transitions. [2022-11-03 03:56:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:56:30,751 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 101 [2022-11-03 03:56:30,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:30,755 INFO L225 Difference]: With dead ends: 1072 [2022-11-03 03:56:30,755 INFO L226 Difference]: Without dead ends: 547 [2022-11-03 03:56:30,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:56:30,758 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 101 mSDsluCounter, 4973 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 5812 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:30,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 5812 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-11-03 03:56:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2022-11-03 03:56:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 428 states have (on average 1.6214953271028036) internal successors, (694), 449 states have internal predecessors, (694), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 877 transitions. [2022-11-03 03:56:30,776 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 877 transitions. Word has length 101 [2022-11-03 03:56:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:30,776 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 877 transitions. [2022-11-03 03:56:30,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 877 transitions. [2022-11-03 03:56:30,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 03:56:30,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:30,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:30,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:30,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:30,995 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash 289345582, now seen corresponding path program 1 times [2022-11-03 03:56:30,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:30,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767237607] [2022-11-03 03:56:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:30,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:30,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:30,997 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:30,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:56:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:31,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:56:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:56:31,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:31,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:31,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767237607] [2022-11-03 03:56:31,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767237607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:31,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:31,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:56:31,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764664283] [2022-11-03 03:56:31,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:31,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:56:31,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:31,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:56:31,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:31,467 INFO L87 Difference]: Start difference. First operand 547 states and 877 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:31,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:31,661 INFO L93 Difference]: Finished difference Result 1019 states and 1665 transitions. [2022-11-03 03:56:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:31,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 102 [2022-11-03 03:56:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:31,666 INFO L225 Difference]: With dead ends: 1019 [2022-11-03 03:56:31,666 INFO L226 Difference]: Without dead ends: 547 [2022-11-03 03:56:31,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:56:31,669 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 50 mSDsluCounter, 4982 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 5822 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:31,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 5822 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:31,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-11-03 03:56:31,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2022-11-03 03:56:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 428 states have (on average 1.6191588785046729) internal successors, (693), 449 states have internal predecessors, (693), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 876 transitions. [2022-11-03 03:56:31,686 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 876 transitions. Word has length 102 [2022-11-03 03:56:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:31,687 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 876 transitions. [2022-11-03 03:56:31,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 876 transitions. [2022-11-03 03:56:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 03:56:31,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:31,689 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:31,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:31,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:31,909 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:31,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:31,909 INFO L85 PathProgramCache]: Analyzing trace with hash 371915255, now seen corresponding path program 1 times [2022-11-03 03:56:31,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:31,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183532417] [2022-11-03 03:56:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:31,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:31,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:31,911 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:31,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:56:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:32,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:56:32,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:56:32,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:32,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:32,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183532417] [2022-11-03 03:56:32,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183532417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:32,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:32,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:56:32,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951327351] [2022-11-03 03:56:32,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:32,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:56:32,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:32,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:56:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:32,358 INFO L87 Difference]: Start difference. First operand 547 states and 876 transitions. Second operand has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:32,555 INFO L93 Difference]: Finished difference Result 1057 states and 1710 transitions. [2022-11-03 03:56:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:56:32,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2022-11-03 03:56:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:32,561 INFO L225 Difference]: With dead ends: 1057 [2022-11-03 03:56:32,561 INFO L226 Difference]: Without dead ends: 544 [2022-11-03 03:56:32,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:56:32,564 INFO L413 NwaCegarLoop]: 838 mSDtfsCounter, 69 mSDsluCounter, 4968 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 5806 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:32,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 5806 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-11-03 03:56:32,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2022-11-03 03:56:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 425 states have (on average 1.611764705882353) internal successors, (685), 446 states have internal predecessors, (685), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-03 03:56:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 868 transitions. [2022-11-03 03:56:32,581 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 868 transitions. Word has length 103 [2022-11-03 03:56:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:32,581 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 868 transitions. [2022-11-03 03:56:32,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:56:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 868 transitions. [2022-11-03 03:56:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 03:56:32,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:32,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:32,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 03:56:32,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:32,804 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash 285436627, now seen corresponding path program 1 times [2022-11-03 03:56:32,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:32,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474742459] [2022-11-03 03:56:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:32,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:32,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:32,806 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:32,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:56:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:33,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:56:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:33,765 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 03:56:33,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:33,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:33,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474742459] [2022-11-03 03:56:33,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474742459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:33,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:33,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:56:33,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109857195] [2022-11-03 03:56:33,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:33,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:56:33,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:33,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:56:33,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:56:33,768 INFO L87 Difference]: Start difference. First operand 544 states and 868 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:36,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:36,903 INFO L93 Difference]: Finished difference Result 1606 states and 2663 transitions. [2022-11-03 03:56:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:36,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 104 [2022-11-03 03:56:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:36,908 INFO L225 Difference]: With dead ends: 1606 [2022-11-03 03:56:36,908 INFO L226 Difference]: Without dead ends: 1142 [2022-11-03 03:56:36,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:36,911 INFO L413 NwaCegarLoop]: 869 mSDtfsCounter, 2083 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2190 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:36,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2190 Valid, 1595 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 03:56:36,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-11-03 03:56:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1026. [2022-11-03 03:56:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 808 states have (on average 1.6522277227722773) internal successors, (1335), 838 states have internal predecessors, (1335), 177 states have call successors, (177), 39 states have call predecessors, (177), 40 states have return successors, (179), 161 states have call predecessors, (179), 172 states have call successors, (179) [2022-11-03 03:56:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1691 transitions. [2022-11-03 03:56:36,971 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1691 transitions. Word has length 104 [2022-11-03 03:56:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:36,971 INFO L495 AbstractCegarLoop]: Abstraction has 1026 states and 1691 transitions. [2022-11-03 03:56:36,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:56:36,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1691 transitions. [2022-11-03 03:56:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 03:56:36,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:36,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:37,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:37,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:37,188 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:37,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:37,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1934563850, now seen corresponding path program 1 times [2022-11-03 03:56:37,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:37,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891827114] [2022-11-03 03:56:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:37,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:37,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:37,190 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:37,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:56:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:37,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:56:37,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:37,979 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 03:56:37,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:37,980 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:37,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891827114] [2022-11-03 03:56:37,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891827114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:37,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:37,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:56:37,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938759735] [2022-11-03 03:56:37,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:37,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:56:37,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:37,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:56:37,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:56:37,982 INFO L87 Difference]: Start difference. First operand 1026 states and 1691 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 4 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:56:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:41,045 INFO L93 Difference]: Finished difference Result 2215 states and 3755 transitions. [2022-11-03 03:56:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:41,046 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 4 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 133 [2022-11-03 03:56:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:41,052 INFO L225 Difference]: With dead ends: 2215 [2022-11-03 03:56:41,052 INFO L226 Difference]: Without dead ends: 1269 [2022-11-03 03:56:41,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:56:41,058 INFO L413 NwaCegarLoop]: 894 mSDtfsCounter, 1370 mSDsluCounter, 1544 mSDsCounter, 0 mSdLazyCounter, 2626 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 2438 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 2626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:41,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1370 Valid, 2438 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 2626 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:56:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-11-03 03:56:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1034. [2022-11-03 03:56:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 814 states have (on average 1.6474201474201475) internal successors, (1341), 844 states have internal predecessors, (1341), 177 states have call successors, (177), 39 states have call predecessors, (177), 42 states have return successors, (211), 163 states have call predecessors, (211), 172 states have call successors, (211) [2022-11-03 03:56:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1729 transitions. [2022-11-03 03:56:41,198 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1729 transitions. Word has length 133 [2022-11-03 03:56:41,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:41,199 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1729 transitions. [2022-11-03 03:56:41,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 4 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:56:41,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1729 transitions. [2022-11-03 03:56:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 03:56:41,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:41,205 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:41,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 03:56:41,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:41,427 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:41,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:41,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1836668151, now seen corresponding path program 1 times [2022-11-03 03:56:41,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:41,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237345977] [2022-11-03 03:56:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:41,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:41,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:41,430 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:41,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:56:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:56:41,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:42,067 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 03:56:42,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:42,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:42,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237345977] [2022-11-03 03:56:42,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237345977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:42,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:42,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:56:42,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915760945] [2022-11-03 03:56:42,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:42,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:56:42,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:42,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:56:42,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:42,069 INFO L87 Difference]: Start difference. First operand 1034 states and 1729 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 03:56:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:47,559 INFO L93 Difference]: Finished difference Result 3334 states and 5655 transitions. [2022-11-03 03:56:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:56:47,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 133 [2022-11-03 03:56:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:47,570 INFO L225 Difference]: With dead ends: 3334 [2022-11-03 03:56:47,570 INFO L226 Difference]: Without dead ends: 2380 [2022-11-03 03:56:47,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:56:47,576 INFO L413 NwaCegarLoop]: 1306 mSDtfsCounter, 1892 mSDsluCounter, 2052 mSDsCounter, 0 mSdLazyCounter, 4837 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1967 SdHoareTripleChecker+Valid, 3358 SdHoareTripleChecker+Invalid, 5490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 4837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:47,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1967 Valid, 3358 Invalid, 5490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 4837 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-03 03:56:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2022-11-03 03:56:47,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2171. [2022-11-03 03:56:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 1631 states have (on average 1.623543838136113) internal successors, (2648), 1709 states have internal predecessors, (2648), 456 states have call successors, (456), 63 states have call predecessors, (456), 83 states have return successors, (543), 432 states have call predecessors, (543), 451 states have call successors, (543) [2022-11-03 03:56:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 3647 transitions. [2022-11-03 03:56:47,837 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 3647 transitions. Word has length 133 [2022-11-03 03:56:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:47,838 INFO L495 AbstractCegarLoop]: Abstraction has 2171 states and 3647 transitions. [2022-11-03 03:56:47,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 03:56:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 3647 transitions. [2022-11-03 03:56:47,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 03:56:47,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:47,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:47,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:48,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:48,064 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:48,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:48,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1695194515, now seen corresponding path program 1 times [2022-11-03 03:56:48,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:48,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970957072] [2022-11-03 03:56:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:48,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:48,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:48,065 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:48,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:56:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:48,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:56:48,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:48,700 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 03:56:48,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:48,700 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:48,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970957072] [2022-11-03 03:56:48,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970957072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:48,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:48,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:48,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051742653] [2022-11-03 03:56:48,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:48,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:48,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:48,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:48,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:48,703 INFO L87 Difference]: Start difference. First operand 2171 states and 3647 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:56:54,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:54,062 INFO L93 Difference]: Finished difference Result 7029 states and 12094 transitions. [2022-11-03 03:56:54,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 03:56:54,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 134 [2022-11-03 03:56:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:54,089 INFO L225 Difference]: With dead ends: 7029 [2022-11-03 03:56:54,089 INFO L226 Difference]: Without dead ends: 4938 [2022-11-03 03:56:54,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:56:54,103 INFO L413 NwaCegarLoop]: 1356 mSDtfsCounter, 2645 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 3881 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2714 SdHoareTripleChecker+Valid, 3311 SdHoareTripleChecker+Invalid, 4587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 3881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:54,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2714 Valid, 3311 Invalid, 4587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 3881 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-03 03:56:54,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2022-11-03 03:56:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 4713. [2022-11-03 03:56:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 3537 states have (on average 1.623409669211196) internal successors, (5742), 3720 states have internal predecessors, (5742), 992 states have call successors, (992), 152 states have call predecessors, (992), 183 states have return successors, (1127), 918 states have call predecessors, (1127), 987 states have call successors, (1127) [2022-11-03 03:56:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 7861 transitions. [2022-11-03 03:56:54,661 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 7861 transitions. Word has length 134 [2022-11-03 03:56:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:54,661 INFO L495 AbstractCegarLoop]: Abstraction has 4713 states and 7861 transitions. [2022-11-03 03:56:54,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:56:54,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 7861 transitions. [2022-11-03 03:56:54,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:56:54,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:54,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:54,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-03 03:56:54,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:54,879 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:54,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:54,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1181890022, now seen corresponding path program 1 times [2022-11-03 03:56:54,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:54,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573154072] [2022-11-03 03:56:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:54,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:54,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:54,881 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:54,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:56:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:55,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:56:55,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:55,637 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 03:56:55,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:55,638 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:55,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573154072] [2022-11-03 03:56:55,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573154072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:55,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:55,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:56:55,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702645942] [2022-11-03 03:56:55,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:55,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:56:55,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:55,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:56:55,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:55,640 INFO L87 Difference]: Start difference. First operand 4713 states and 7861 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 4 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:57:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:04,103 INFO L93 Difference]: Finished difference Result 18112 states and 31230 transitions. [2022-11-03 03:57:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:57:04,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 4 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 136 [2022-11-03 03:57:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:04,203 INFO L225 Difference]: With dead ends: 18112 [2022-11-03 03:57:04,204 INFO L226 Difference]: Without dead ends: 13473 [2022-11-03 03:57:04,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:57:04,231 INFO L413 NwaCegarLoop]: 1660 mSDtfsCounter, 3238 mSDsluCounter, 2036 mSDsCounter, 0 mSdLazyCounter, 5408 mSolverCounterSat, 1276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3366 SdHoareTripleChecker+Valid, 3696 SdHoareTripleChecker+Invalid, 6684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1276 IncrementalHoareTripleChecker+Valid, 5408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:04,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3366 Valid, 3696 Invalid, 6684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1276 Valid, 5408 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 03:57:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13473 states. [2022-11-03 03:57:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13473 to 8503. [2022-11-03 03:57:05,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8503 states, 6101 states have (on average 1.6038354368136372) internal successors, (9785), 6515 states have internal predecessors, (9785), 2096 states have call successors, (2096), 229 states have call predecessors, (2096), 305 states have return successors, (2547), 2026 states have call predecessors, (2547), 2091 states have call successors, (2547) [2022-11-03 03:57:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8503 states to 8503 states and 14428 transitions. [2022-11-03 03:57:05,503 INFO L78 Accepts]: Start accepts. Automaton has 8503 states and 14428 transitions. Word has length 136 [2022-11-03 03:57:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:05,503 INFO L495 AbstractCegarLoop]: Abstraction has 8503 states and 14428 transitions. [2022-11-03 03:57:05,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 4 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:57:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 8503 states and 14428 transitions. [2022-11-03 03:57:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:57:05,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:05,506 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:05,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:05,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:05,723 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:05,723 INFO L85 PathProgramCache]: Analyzing trace with hash -758243300, now seen corresponding path program 1 times [2022-11-03 03:57:05,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:05,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109809849] [2022-11-03 03:57:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:05,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:05,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:05,726 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:05,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:57:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:06,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:57:06,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:06,481 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 03:57:06,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:06,481 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:06,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109809849] [2022-11-03 03:57:06,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109809849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:06,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:06,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:57:06,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215865456] [2022-11-03 03:57:06,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:06,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:57:06,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:06,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:57:06,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:57:06,484 INFO L87 Difference]: Start difference. First operand 8503 states and 14428 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:57:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:12,755 INFO L93 Difference]: Finished difference Result 24868 states and 42819 transitions. [2022-11-03 03:57:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:57:12,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 136 [2022-11-03 03:57:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:12,866 INFO L225 Difference]: With dead ends: 24868 [2022-11-03 03:57:12,866 INFO L226 Difference]: Without dead ends: 17740 [2022-11-03 03:57:12,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:57:12,904 INFO L413 NwaCegarLoop]: 1018 mSDtfsCounter, 2598 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 3032 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2672 SdHoareTripleChecker+Valid, 2453 SdHoareTripleChecker+Invalid, 3601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 3032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:12,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2672 Valid, 2453 Invalid, 3601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 3032 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 03:57:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17740 states. [2022-11-03 03:57:15,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17740 to 16900. [2022-11-03 03:57:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16900 states, 12138 states have (on average 1.6051244027022573) internal successors, (19483), 12980 states have internal predecessors, (19483), 4098 states have call successors, (4098), 435 states have call predecessors, (4098), 663 states have return successors, (5337), 3982 states have call predecessors, (5337), 4093 states have call successors, (5337) [2022-11-03 03:57:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16900 states to 16900 states and 28918 transitions. [2022-11-03 03:57:15,241 INFO L78 Accepts]: Start accepts. Automaton has 16900 states and 28918 transitions. Word has length 136 [2022-11-03 03:57:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:15,242 INFO L495 AbstractCegarLoop]: Abstraction has 16900 states and 28918 transitions. [2022-11-03 03:57:15,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:57:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 16900 states and 28918 transitions. [2022-11-03 03:57:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 03:57:15,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:15,245 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:15,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:15,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:15,459 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:15,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:15,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1376688126, now seen corresponding path program 1 times [2022-11-03 03:57:15,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:15,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125185974] [2022-11-03 03:57:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:15,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:15,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:15,461 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:15,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:57:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:15,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:57:15,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:16,313 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 03:57:16,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:16,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:16,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125185974] [2022-11-03 03:57:16,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125185974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:16,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:16,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:57:16,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834934846] [2022-11-03 03:57:16,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:16,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:57:16,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:57:16,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:57:16,316 INFO L87 Difference]: Start difference. First operand 16900 states and 28918 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 8 states have internal predecessors, (100), 5 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 03:57:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:24,551 INFO L93 Difference]: Finished difference Result 35566 states and 61131 transitions. [2022-11-03 03:57:24,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 03:57:24,552 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 8 states have internal predecessors, (100), 5 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 141 [2022-11-03 03:57:24,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:24,682 INFO L225 Difference]: With dead ends: 35566 [2022-11-03 03:57:24,682 INFO L226 Difference]: Without dead ends: 20041 [2022-11-03 03:57:24,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:57:24,754 INFO L413 NwaCegarLoop]: 963 mSDtfsCounter, 1956 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 4879 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2027 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 5359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 4879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:24,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2027 Valid, 3228 Invalid, 5359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 4879 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-03 03:57:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20041 states. [2022-11-03 03:57:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20041 to 18556. [2022-11-03 03:57:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18556 states, 13305 states have (on average 1.5836151822623075) internal successors, (21070), 14264 states have internal predecessors, (21070), 4431 states have call successors, (4431), 555 states have call predecessors, (4431), 819 states have return successors, (6021), 4234 states have call predecessors, (6021), 4426 states have call successors, (6021) [2022-11-03 03:57:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18556 states to 18556 states and 31522 transitions. [2022-11-03 03:57:27,832 INFO L78 Accepts]: Start accepts. Automaton has 18556 states and 31522 transitions. Word has length 141 [2022-11-03 03:57:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:27,833 INFO L495 AbstractCegarLoop]: Abstraction has 18556 states and 31522 transitions. [2022-11-03 03:57:27,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 8 states have internal predecessors, (100), 5 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 03:57:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 18556 states and 31522 transitions. [2022-11-03 03:57:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-03 03:57:27,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:27,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:27,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 03:57:28,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:28,055 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:28,055 INFO L85 PathProgramCache]: Analyzing trace with hash 900017696, now seen corresponding path program 1 times [2022-11-03 03:57:28,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:28,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297599740] [2022-11-03 03:57:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:28,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:28,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:28,057 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:28,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 03:57:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:28,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:57:28,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:28,534 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 03:57:28,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:28,534 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:28,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297599740] [2022-11-03 03:57:28,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297599740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:28,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:28,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:57:28,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672411105] [2022-11-03 03:57:28,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:28,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:57:28,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:57:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:57:28,537 INFO L87 Difference]: Start difference. First operand 18556 states and 31522 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:57:30,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:30,855 INFO L93 Difference]: Finished difference Result 37309 states and 64084 transitions. [2022-11-03 03:57:30,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:57:30,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 148 [2022-11-03 03:57:30,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:30,952 INFO L225 Difference]: With dead ends: 37309 [2022-11-03 03:57:30,952 INFO L226 Difference]: Without dead ends: 18556 [2022-11-03 03:57:31,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 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 03:57:31,028 INFO L413 NwaCegarLoop]: 887 mSDtfsCounter, 234 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:31,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 2407 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:57:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18556 states. [2022-11-03 03:57:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18556 to 18556. [2022-11-03 03:57:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18556 states, 13305 states have (on average 1.5601653513716647) internal successors, (20758), 14264 states have internal predecessors, (20758), 4431 states have call successors, (4431), 555 states have call predecessors, (4431), 819 states have return successors, (6021), 4234 states have call predecessors, (6021), 4426 states have call successors, (6021) [2022-11-03 03:57:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18556 states to 18556 states and 31210 transitions. [2022-11-03 03:57:33,342 INFO L78 Accepts]: Start accepts. Automaton has 18556 states and 31210 transitions. Word has length 148 [2022-11-03 03:57:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:33,343 INFO L495 AbstractCegarLoop]: Abstraction has 18556 states and 31210 transitions. [2022-11-03 03:57:33,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:57:33,344 INFO L276 IsEmpty]: Start isEmpty. Operand 18556 states and 31210 transitions. [2022-11-03 03:57:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 03:57:33,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:33,347 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:33,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:33,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:33,563 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:33,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:33,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1960125735, now seen corresponding path program 1 times [2022-11-03 03:57:33,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:33,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016871335] [2022-11-03 03:57:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:33,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:33,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:33,565 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:33,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 03:57:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:34,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:57:34,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 03:57:34,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:34,227 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:34,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016871335] [2022-11-03 03:57:34,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016871335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:34,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:34,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:57:34,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999182322] [2022-11-03 03:57:34,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:34,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:57:34,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:34,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:57:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:57:34,229 INFO L87 Difference]: Start difference. First operand 18556 states and 31210 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 4 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 03:57:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:40,434 INFO L93 Difference]: Finished difference Result 37701 states and 63853 transitions. [2022-11-03 03:57:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:57:40,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 4 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 153 [2022-11-03 03:57:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:40,517 INFO L225 Difference]: With dead ends: 37701 [2022-11-03 03:57:40,517 INFO L226 Difference]: Without dead ends: 20689 [2022-11-03 03:57:40,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:57:40,567 INFO L413 NwaCegarLoop]: 864 mSDtfsCounter, 2027 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 3036 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2103 SdHoareTripleChecker+Valid, 2197 SdHoareTripleChecker+Invalid, 3538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 3036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:40,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2103 Valid, 2197 Invalid, 3538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 3036 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 03:57:40,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20689 states. [2022-11-03 03:57:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20689 to 19519. [2022-11-03 03:57:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19519 states, 14022 states have (on average 1.547354157752104) internal successors, (21697), 15047 states have internal predecessors, (21697), 4524 states have call successors, (4524), 639 states have call predecessors, (4524), 972 states have return successors, (6453), 4330 states have call predecessors, (6453), 4519 states have call successors, (6453) [2022-11-03 03:57:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19519 states to 19519 states and 32674 transitions. [2022-11-03 03:57:43,554 INFO L78 Accepts]: Start accepts. Automaton has 19519 states and 32674 transitions. Word has length 153 [2022-11-03 03:57:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:43,555 INFO L495 AbstractCegarLoop]: Abstraction has 19519 states and 32674 transitions. [2022-11-03 03:57:43,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 4 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 03:57:43,556 INFO L276 IsEmpty]: Start isEmpty. Operand 19519 states and 32674 transitions. [2022-11-03 03:57:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-03 03:57:43,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:43,559 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:43,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:43,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:43,783 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1254589965, now seen corresponding path program 1 times [2022-11-03 03:57:43,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:43,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176529889] [2022-11-03 03:57:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:43,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:43,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:43,785 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:43,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:57:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:44,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:57:44,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:57:44,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:44,538 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:44,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176529889] [2022-11-03 03:57:44,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176529889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:44,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:44,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:57:44,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956828549] [2022-11-03 03:57:44,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:44,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:57:44,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:44,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:57:44,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:57:44,541 INFO L87 Difference]: Start difference. First operand 19519 states and 32674 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:57:52,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:52,599 INFO L93 Difference]: Finished difference Result 44671 states and 75457 transitions. [2022-11-03 03:57:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:57:52,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 3 states have call successors, (16) Word has length 158 [2022-11-03 03:57:52,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:52,707 INFO L225 Difference]: With dead ends: 44671 [2022-11-03 03:57:52,707 INFO L226 Difference]: Without dead ends: 26672 [2022-11-03 03:57:52,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:57:52,757 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 1757 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 3462 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1834 SdHoareTripleChecker+Valid, 2482 SdHoareTripleChecker+Invalid, 3889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 3462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:52,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1834 Valid, 2482 Invalid, 3889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 3462 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-03 03:57:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26672 states. [2022-11-03 03:57:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26672 to 26052. [2022-11-03 03:57:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26052 states, 18536 states have (on average 1.5427816141562365) internal successors, (28597), 19961 states have internal predecessors, (28597), 6300 states have call successors, (6300), 857 states have call predecessors, (6300), 1215 states have return successors, (8892), 5957 states have call predecessors, (8892), 6295 states have call successors, (8892) [2022-11-03 03:57:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26052 states to 26052 states and 43789 transitions. [2022-11-03 03:57:56,028 INFO L78 Accepts]: Start accepts. Automaton has 26052 states and 43789 transitions. Word has length 158 [2022-11-03 03:57:56,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:56,029 INFO L495 AbstractCegarLoop]: Abstraction has 26052 states and 43789 transitions. [2022-11-03 03:57:56,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:57:56,029 INFO L276 IsEmpty]: Start isEmpty. Operand 26052 states and 43789 transitions. [2022-11-03 03:57:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-03 03:57:56,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:56,032 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:56,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:56,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:56,233 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1333098961, now seen corresponding path program 1 times [2022-11-03 03:57:56,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:56,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111470742] [2022-11-03 03:57:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:56,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:56,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:56,235 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:56,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 03:57:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:56,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:57:56,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:57:56,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:56,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:56,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111470742] [2022-11-03 03:57:56,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111470742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:56,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:56,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:57:56,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875107497] [2022-11-03 03:57:56,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:56,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:57:56,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:57:56,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:57:56,967 INFO L87 Difference]: Start difference. First operand 26052 states and 43789 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:58:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:05,201 INFO L93 Difference]: Finished difference Result 52000 states and 87639 transitions. [2022-11-03 03:58:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:58:05,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 3 states have call successors, (16) Word has length 158 [2022-11-03 03:58:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:05,394 INFO L225 Difference]: With dead ends: 52000 [2022-11-03 03:58:05,395 INFO L226 Difference]: Without dead ends: 27488 [2022-11-03 03:58:05,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:58:05,465 INFO L413 NwaCegarLoop]: 884 mSDtfsCounter, 1612 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 3930 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 2691 SdHoareTripleChecker+Invalid, 4316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 3930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:05,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1683 Valid, 2691 Invalid, 4316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 3930 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 03:58:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27488 states. [2022-11-03 03:58:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27488 to 26222. [2022-11-03 03:58:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26222 states, 18679 states have (on average 1.542320252690187) internal successors, (28809), 20081 states have internal predecessors, (28809), 6330 states have call successors, (6330), 857 states have call predecessors, (6330), 1212 states have return successors, (8789), 6007 states have call predecessors, (8789), 6325 states have call successors, (8789) [2022-11-03 03:58:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26222 states to 26222 states and 43928 transitions. [2022-11-03 03:58:09,007 INFO L78 Accepts]: Start accepts. Automaton has 26222 states and 43928 transitions. Word has length 158 [2022-11-03 03:58:09,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:09,011 INFO L495 AbstractCegarLoop]: Abstraction has 26222 states and 43928 transitions. [2022-11-03 03:58:09,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:58:09,012 INFO L276 IsEmpty]: Start isEmpty. Operand 26222 states and 43928 transitions. [2022-11-03 03:58:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-03 03:58:09,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:09,015 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:58:09,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:09,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:58:09,223 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:09,223 INFO L85 PathProgramCache]: Analyzing trace with hash -111476247, now seen corresponding path program 1 times [2022-11-03 03:58:09,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:58:09,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655567957] [2022-11-03 03:58:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:09,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:58:09,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:58:09,225 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:58:09,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 03:58:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:09,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:58:09,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:58:09,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:58:10,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:58:10,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655567957] [2022-11-03 03:58:10,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655567957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:10,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [725696949] [2022-11-03 03:58:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:10,305 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:58:10,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:58:10,308 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:58:10,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 03:58:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:10,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:58:10,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:58:10,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:58:11,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [725696949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:11,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938358312] [2022-11-03 03:58:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:11,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:11,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:11,370 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:11,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_729da17c-60b4-4954-bd60-c9a35eee3791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 03:58:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:11,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:58:11,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:58:11,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:58:11,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938358312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:11,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-03 03:58:11,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 6, 5] total 11 [2022-11-03 03:58:11,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971053418] [2022-11-03 03:58:11,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:11,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:58:11,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:58:11,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:58:11,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:58:11,803 INFO L87 Difference]: Start difference. First operand 26222 states and 43928 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:58:15,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:15,907 INFO L93 Difference]: Finished difference Result 51939 states and 87200 transitions. [2022-11-03 03:58:15,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:58:15,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 159 [2022-11-03 03:58:15,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:16,055 INFO L225 Difference]: With dead ends: 51939 [2022-11-03 03:58:16,055 INFO L226 Difference]: Without dead ends: 25798 [2022-11-03 03:58:16,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:58:16,153 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 1248 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:16,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1248 Valid, 761 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:58:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25798 states.