./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.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_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/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_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/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_27556e29-2a86-475b-9760-e1d82399e4bf/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 c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- 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 01:56:18,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:56:18,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:56:19,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:56:19,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:56:19,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:56:19,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:56:19,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:56:19,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:56:19,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:56:19,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:56:19,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:56:19,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:56:19,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:56:19,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:56:19,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:56:19,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:56:19,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:56:19,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:56:19,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:56:19,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:56:19,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:56:19,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:56:19,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:56:19,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:56:19,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:56:19,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:56:19,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:56:19,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:56:19,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:56:19,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:56:19,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:56:19,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:56:19,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:56:19,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:56:19,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:56:19,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:56:19,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:56:19,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:56:19,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:56:19,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:56:19,111 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:56:19,149 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:56:19,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:56:19,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:56:19,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:56:19,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:56:19,151 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:56:19,151 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:56:19,151 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:56:19,152 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:56:19,152 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:56:19,153 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:56:19,153 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:56:19,153 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:56:19,154 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:56:19,154 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:56:19,154 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:56:19,154 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:56:19,155 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:56:19,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:56:19,156 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:56:19,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:56:19,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:56:19,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:56:19,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:56:19,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:56:19,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:56:19,158 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:56:19,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:56:19,159 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:56:19,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:56:19,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:56:19,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:56:19,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:19,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:56:19,161 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:56:19,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:56:19,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:56:19,162 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:56:19,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:56:19,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:56:19,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:56:19,163 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_27556e29-2a86-475b-9760-e1d82399e4bf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2022-11-03 01:56:19,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:56:19,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:56:19,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:56:19,489 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:56:19,490 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:56:19,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-11-03 01:56:19,566 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/data/f764be83a/d98a7a691d6b470ba1cd7fef10971a71/FLAG2a84ad635 [2022-11-03 01:56:20,110 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:56:20,111 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-11-03 01:56:20,123 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/data/f764be83a/d98a7a691d6b470ba1cd7fef10971a71/FLAG2a84ad635 [2022-11-03 01:56:20,426 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/data/f764be83a/d98a7a691d6b470ba1cd7fef10971a71 [2022-11-03 01:56:20,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:56:20,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:56:20,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:20,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:56:20,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:56:20,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:20,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59902079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20, skipping insertion in model container [2022-11-03 01:56:20,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:20,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:56:20,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:56:20,697 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_27556e29-2a86-475b-9760-e1d82399e4bf/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-11-03 01:56:20,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:20,814 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:56:20,826 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_27556e29-2a86-475b-9760-e1d82399e4bf/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-11-03 01:56:20,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:20,901 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:56:20,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20 WrapperNode [2022-11-03 01:56:20,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:20,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:20,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:56:20,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:56:20,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:20,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:20,973 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2022-11-03 01:56:20,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:20,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:56:20,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:56:20,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:56:20,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:20,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:20,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:20,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:21,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:21,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:21,026 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:21,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:21,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:56:21,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:56:21,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:56:21,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:56:21,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20" (1/1) ... [2022-11-03 01:56:21,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:21,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:21,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:56:21,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:56:21,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:56:21,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:56:21,117 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-03 01:56:21,117 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-03 01:56:21,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:56:21,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:56:21,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:56:21,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:56:21,223 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:56:21,225 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:56:21,679 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:56:21,864 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:56:21,864 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 01:56:21,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:21 BoogieIcfgContainer [2022-11-03 01:56:21,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:56:21,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:56:21,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:56:21,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:56:21,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:56:20" (1/3) ... [2022-11-03 01:56:21,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5eb5ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:56:21, skipping insertion in model container [2022-11-03 01:56:21,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:20" (2/3) ... [2022-11-03 01:56:21,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5eb5ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:56:21, skipping insertion in model container [2022-11-03 01:56:21,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:21" (3/3) ... [2022-11-03 01:56:21,876 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2022-11-03 01:56:21,894 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:56:21,894 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:56:21,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:56:21,959 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;@25d11b3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:56:21,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:56:21,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 36 states have internal predecessors, (51), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:56:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 01:56:21,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:21,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:21,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:21,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:21,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1833966620, now seen corresponding path program 1 times [2022-11-03 01:56:22,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:22,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134785638] [2022-11-03 01:56:22,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:22,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:56:22,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:22,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134785638] [2022-11-03 01:56:22,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134785638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:22,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:22,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:56:22,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421098386] [2022-11-03 01:56:22,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:22,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:56:22,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:22,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:56:22,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:56:22,784 INFO L87 Difference]: Start difference. First operand has 45 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 36 states have internal predecessors, (51), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:56:23,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:23,089 INFO L93 Difference]: Finished difference Result 127 states and 210 transitions. [2022-11-03 01:56:23,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:56:23,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-03 01:56:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:23,101 INFO L225 Difference]: With dead ends: 127 [2022-11-03 01:56:23,101 INFO L226 Difference]: Without dead ends: 78 [2022-11-03 01:56:23,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:56:23,107 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 50 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:23,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 366 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:56:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-03 01:56:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2022-11-03 01:56:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 38 states have internal predecessors, (50), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-03 01:56:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2022-11-03 01:56:23,157 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 24 [2022-11-03 01:56:23,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:23,157 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2022-11-03 01:56:23,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:56:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2022-11-03 01:56:23,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 01:56:23,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:23,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:23,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:56:23,161 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:23,162 INFO L85 PathProgramCache]: Analyzing trace with hash -295088481, now seen corresponding path program 1 times [2022-11-03 01:56:23,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:23,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240158393] [2022-11-03 01:56:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:23,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:56:23,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240158393] [2022-11-03 01:56:23,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240158393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:23,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563221897] [2022-11-03 01:56:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:23,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:23,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:23,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:23,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:56:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:23,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:56:23,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:56:23,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:56:24,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563221897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:24,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1146891210] [2022-11-03 01:56:24,343 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-03 01:56:24,343 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:24,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:24,353 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:24,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:24,846 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-11-03 01:56:24,907 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:56:27,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1146891210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:27,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:27,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8, 11, 9] total 33 [2022-11-03 01:56:27,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003367742] [2022-11-03 01:56:27,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:27,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:56:27,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:27,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:56:27,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 01:56:27,211 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:56:27,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:27,966 INFO L93 Difference]: Finished difference Result 132 states and 213 transitions. [2022-11-03 01:56:27,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:56:27,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-11-03 01:56:27,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:27,969 INFO L225 Difference]: With dead ends: 132 [2022-11-03 01:56:27,969 INFO L226 Difference]: Without dead ends: 118 [2022-11-03 01:56:27,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 01:56:27,971 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 117 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:27,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 296 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:56:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-03 01:56:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 60. [2022-11-03 01:56:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 46 states have internal predecessors, (58), 11 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (22), 12 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-03 01:56:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 91 transitions. [2022-11-03 01:56:28,000 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 91 transitions. Word has length 27 [2022-11-03 01:56:28,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:28,000 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 91 transitions. [2022-11-03 01:56:28,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:56:28,001 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 91 transitions. [2022-11-03 01:56:28,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 01:56:28,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:28,002 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:28,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:28,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:28,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:28,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1692541996, now seen corresponding path program 1 times [2022-11-03 01:56:28,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:28,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748108145] [2022-11-03 01:56:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:28,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:29,188 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 01:56:29,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:29,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748108145] [2022-11-03 01:56:29,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748108145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:29,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:29,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-03 01:56:29,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413464002] [2022-11-03 01:56:29,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:29,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:56:29,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:29,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:56:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:56:29,194 INFO L87 Difference]: Start difference. First operand 60 states and 91 transitions. Second operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:56:29,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:29,940 INFO L93 Difference]: Finished difference Result 126 states and 193 transitions. [2022-11-03 01:56:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:56:29,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-11-03 01:56:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:29,943 INFO L225 Difference]: With dead ends: 126 [2022-11-03 01:56:29,943 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 01:56:29,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:56:29,945 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 132 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:29,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 820 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:56:29,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 01:56:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 68. [2022-11-03 01:56:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.3125) internal successors, (63), 51 states have internal predecessors, (63), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (28), 15 states have call predecessors, (28), 13 states have call successors, (28) [2022-11-03 01:56:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 106 transitions. [2022-11-03 01:56:29,978 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 106 transitions. Word has length 28 [2022-11-03 01:56:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:29,978 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 106 transitions. [2022-11-03 01:56:29,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:56:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 106 transitions. [2022-11-03 01:56:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 01:56:29,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:29,980 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:29,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:56:29,981 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1250961361, now seen corresponding path program 1 times [2022-11-03 01:56:29,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:29,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642965803] [2022-11-03 01:56:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:29,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:56:30,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:30,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642965803] [2022-11-03 01:56:30,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642965803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:30,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703142596] [2022-11-03 01:56:30,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:30,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:30,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:30,399 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:30,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:56:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:30,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 01:56:30,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:56:30,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:56:30,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703142596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:30,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1615647740] [2022-11-03 01:56:30,925 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-03 01:56:30,925 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:30,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:30,926 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:30,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:31,589 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2022-11-03 01:56:31,638 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-11-03 01:56:31,770 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:56:35,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1233#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:56:35,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:56:35,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:35,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-03 01:56:35,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898703816] [2022-11-03 01:56:35,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:35,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 01:56:35,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:35,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 01:56:35,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:56:35,786 INFO L87 Difference]: Start difference. First operand 68 states and 106 transitions. Second operand has 18 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 01:56:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:36,351 INFO L93 Difference]: Finished difference Result 158 states and 239 transitions. [2022-11-03 01:56:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:56:36,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 28 [2022-11-03 01:56:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:36,362 INFO L225 Difference]: With dead ends: 158 [2022-11-03 01:56:36,362 INFO L226 Difference]: Without dead ends: 96 [2022-11-03 01:56:36,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 01:56:36,369 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 118 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:36,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 437 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:56:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-03 01:56:36,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2022-11-03 01:56:36,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 49 states have internal predecessors, (62), 12 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (17), 12 states have call predecessors, (17), 10 states have call successors, (17) [2022-11-03 01:56:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 91 transitions. [2022-11-03 01:56:36,392 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 91 transitions. Word has length 28 [2022-11-03 01:56:36,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:36,393 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 91 transitions. [2022-11-03 01:56:36,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 01:56:36,393 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 91 transitions. [2022-11-03 01:56:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:56:36,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:36,394 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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 01:56:36,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:36,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:36,617 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:36,617 INFO L85 PathProgramCache]: Analyzing trace with hash 313218207, now seen corresponding path program 1 times [2022-11-03 01:56:36,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:36,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962550054] [2022-11-03 01:56:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:36,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:56:36,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:36,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962550054] [2022-11-03 01:56:36,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962550054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:36,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050867996] [2022-11-03 01:56:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:36,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:36,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:36,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:36,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:56:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:36,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:56:36,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:56:36,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:56:37,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050867996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:37,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [480169190] [2022-11-03 01:56:37,182 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 01:56:37,183 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:37,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:37,183 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:37,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:37,698 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-11-03 01:56:37,775 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:56:39,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [480169190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:39,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:39,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7, 11, 9] total 32 [2022-11-03 01:56:39,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780807978] [2022-11-03 01:56:39,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:39,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:56:39,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:39,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:56:39,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:56:39,946 INFO L87 Difference]: Start difference. First operand 64 states and 91 transitions. Second operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:56:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:42,130 INFO L93 Difference]: Finished difference Result 115 states and 164 transitions. [2022-11-03 01:56:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:56:42,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-11-03 01:56:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:42,133 INFO L225 Difference]: With dead ends: 115 [2022-11-03 01:56:42,133 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 01:56:42,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=194, Invalid=1366, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 01:56:42,134 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 101 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:42,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 296 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:56:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 01:56:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2022-11-03 01:56:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.32) internal successors, (66), 53 states have internal predecessors, (66), 12 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (20), 12 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-03 01:56:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 98 transitions. [2022-11-03 01:56:42,164 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 98 transitions. Word has length 30 [2022-11-03 01:56:42,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:42,164 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 98 transitions. [2022-11-03 01:56:42,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:56:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 98 transitions. [2022-11-03 01:56:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 01:56:42,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:42,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:42,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:42,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:42,378 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:42,379 INFO L85 PathProgramCache]: Analyzing trace with hash 242985674, now seen corresponding path program 1 times [2022-11-03 01:56:42,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:42,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700083520] [2022-11-03 01:56:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:42,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:56:42,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:42,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700083520] [2022-11-03 01:56:42,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700083520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:42,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231117580] [2022-11-03 01:56:42,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:42,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:42,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:42,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:42,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:56:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:42,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:56:42,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:56:42,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:56:43,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231117580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:43,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163884098] [2022-11-03 01:56:43,023 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 01:56:43,023 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:43,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:43,024 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:43,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:43,545 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-11-03 01:56:43,670 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:56:47,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1163884098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:47,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:47,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [9, 11, 9] total 38 [2022-11-03 01:56:47,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377519907] [2022-11-03 01:56:47,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:47,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 01:56:47,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 01:56:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 01:56:47,162 INFO L87 Difference]: Start difference. First operand 68 states and 98 transitions. Second operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:56:50,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:50,892 INFO L93 Difference]: Finished difference Result 97 states and 138 transitions. [2022-11-03 01:56:50,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:56:50,892 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-11-03 01:56:50,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:50,894 INFO L225 Difference]: With dead ends: 97 [2022-11-03 01:56:50,894 INFO L226 Difference]: Without dead ends: 80 [2022-11-03 01:56:50,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 01:56:50,895 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 169 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:50,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 121 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:56:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-03 01:56:50,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2022-11-03 01:56:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 53 states have internal predecessors, (67), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-03 01:56:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 96 transitions. [2022-11-03 01:56:50,925 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 96 transitions. Word has length 31 [2022-11-03 01:56:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:50,925 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 96 transitions. [2022-11-03 01:56:50,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:56:50,926 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 96 transitions. [2022-11-03 01:56:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 01:56:50,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:50,927 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:50,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:51,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:56:51,142 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:51,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:51,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2102854921, now seen corresponding path program 1 times [2022-11-03 01:56:51,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:51,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298015912] [2022-11-03 01:56:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:51,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:56:52,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:52,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298015912] [2022-11-03 01:56:52,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298015912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:52,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954267412] [2022-11-03 01:56:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:52,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:52,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:52,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:52,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:56:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:52,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 01:56:52,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:56:52,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:56:52,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954267412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:52,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2018097707] [2022-11-03 01:56:52,983 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 01:56:52,983 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:52,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:52,984 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:52,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:53,423 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:56:53,599 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:56:56,213 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-03 01:56:56,863 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-03 01:56:56,872 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-11-03 01:56:56,973 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:05,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2737#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-03 01:57:05,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:57:05,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:57:05,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-11-03 01:57:05,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388551257] [2022-11-03 01:57:05,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:05,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 01:57:05,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:05,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 01:57:05,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2668, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 01:57:05,082 INFO L87 Difference]: Start difference. First operand 67 states and 96 transitions. Second operand has 33 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 01:57:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:06,139 INFO L93 Difference]: Finished difference Result 93 states and 129 transitions. [2022-11-03 01:57:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 01:57:06,140 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 32 [2022-11-03 01:57:06,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:06,140 INFO L225 Difference]: With dead ends: 93 [2022-11-03 01:57:06,141 INFO L226 Difference]: Without dead ends: 69 [2022-11-03 01:57:06,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=319, Invalid=3971, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 01:57:06,143 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 158 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:06,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 676 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-03 01:57:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2022-11-03 01:57:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 44 states have internal predecessors, (57), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 01:57:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2022-11-03 01:57:06,164 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 32 [2022-11-03 01:57:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:06,164 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2022-11-03 01:57:06,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 01:57:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2022-11-03 01:57:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 01:57:06,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:06,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:06,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:06,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:06,389 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1153759543, now seen corresponding path program 2 times [2022-11-03 01:57:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:06,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316205856] [2022-11-03 01:57:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:06,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 01:57:07,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:07,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316205856] [2022-11-03 01:57:07,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316205856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:07,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791458131] [2022-11-03 01:57:07,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:57:07,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:07,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:07,266 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:07,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:57:07,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 01:57:07,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:57:07,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 01:57:07,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:07,806 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 01:57:07,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:07,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791458131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:07,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:57:07,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 20 [2022-11-03 01:57:07,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914795227] [2022-11-03 01:57:07,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:07,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:57:07,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:07,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:57:07,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:57:07,808 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:08,481 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2022-11-03 01:57:08,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:08,482 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-11-03 01:57:08,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:08,483 INFO L225 Difference]: With dead ends: 65 [2022-11-03 01:57:08,483 INFO L226 Difference]: Without dead ends: 47 [2022-11-03 01:57:08,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:57:08,484 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 46 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:08,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 297 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:57:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-03 01:57:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-03 01:57:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 37 states have internal predecessors, (47), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 01:57:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-11-03 01:57:08,515 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 32 [2022-11-03 01:57:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:08,516 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-11-03 01:57:08,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-11-03 01:57:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 01:57:08,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:08,518 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:08,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:08,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:08,737 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:08,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1789743814, now seen corresponding path program 2 times [2022-11-03 01:57:08,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:08,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297849247] [2022-11-03 01:57:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:08,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:57:08,790 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:57:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:57:08,863 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:57:08,863 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:57:08,864 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:57:08,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:57:08,869 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2022-11-03 01:57:08,872 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:57:08,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:57:08 BoogieIcfgContainer [2022-11-03 01:57:08,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:57:08,919 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:57:08,919 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:57:08,920 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:57:08,920 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:21" (3/4) ... [2022-11-03 01:57:08,923 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:57:08,923 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:57:08,924 INFO L158 Benchmark]: Toolchain (without parser) took 48491.00ms. Allocated memory was 117.4MB in the beginning and 362.8MB in the end (delta: 245.4MB). Free memory was 81.0MB in the beginning and 327.1MB in the end (delta: -246.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:57:08,924 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 117.4MB. Free memory is still 97.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:57:08,924 INFO L158 Benchmark]: CACSL2BoogieTranslator took 462.49ms. Allocated memory is still 117.4MB. Free memory was 80.7MB in the beginning and 89.3MB in the end (delta: -8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 01:57:08,925 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.39ms. Allocated memory is still 117.4MB. Free memory was 89.3MB in the beginning and 87.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:57:08,925 INFO L158 Benchmark]: Boogie Preprocessor took 55.46ms. Allocated memory is still 117.4MB. Free memory was 87.3MB in the beginning and 85.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:57:08,926 INFO L158 Benchmark]: RCFGBuilder took 836.82ms. Allocated memory is still 117.4MB. Free memory was 85.6MB in the beginning and 56.7MB in the end (delta: 28.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-03 01:57:08,926 INFO L158 Benchmark]: TraceAbstraction took 47049.76ms. Allocated memory was 117.4MB in the beginning and 362.8MB in the end (delta: 245.4MB). Free memory was 55.9MB in the beginning and 327.1MB in the end (delta: -271.3MB). Peak memory consumption was 186.5MB. Max. memory is 16.1GB. [2022-11-03 01:57:08,927 INFO L158 Benchmark]: Witness Printer took 3.91ms. Allocated memory is still 362.8MB. Free memory is still 327.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:57:08,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 117.4MB. Free memory is still 97.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 462.49ms. Allocated memory is still 117.4MB. Free memory was 80.7MB in the beginning and 89.3MB in the end (delta: -8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.39ms. Allocated memory is still 117.4MB. Free memory was 89.3MB in the beginning and 87.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.46ms. Allocated memory is still 117.4MB. Free memory was 87.3MB in the beginning and 85.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 836.82ms. Allocated memory is still 117.4MB. Free memory was 85.6MB in the beginning and 56.7MB in the end (delta: 28.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 47049.76ms. Allocated memory was 117.4MB in the beginning and 362.8MB in the end (delta: 245.4MB). Free memory was 55.9MB in the beginning and 327.1MB in the end (delta: -271.3MB). Peak memory consumption was 186.5MB. Max. memory is 16.1GB. * Witness Printer took 3.91ms. Allocated memory is still 362.8MB. Free memory is still 327.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 111, overapproximation of bitwiseAnd at line 109, overapproximation of bitwiseComplement at line 77. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add ; [L234] unsigned int zero ; [L235] int sa ; [L236] int sb ; [L237] int tmp ; [L238] int tmp___0 ; [L239] int tmp___1 ; [L240] int tmp___2 ; [L241] int tmp___3 ; [L242] int tmp___4 ; [L243] int tmp___5 ; [L244] int tmp___6 ; [L245] int tmp___7 ; [L246] int tmp___8 ; [L247] int tmp___9 ; [L248] int __retres23 ; VAL [ea=-128, eb=-126] [L252] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L81] return (__retres4); [L252] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=-128, eb=-126] [L252] zero = base2flt(0, 0) [L253] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-128, \old(m)=16777217] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=-128, \old(m)=16777217, e=-128, m=16777217] [L30] COND FALSE !(! m) VAL [\old(e)=-128, \old(m)=16777217, e=-128, m=16777217] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-128, \old(m)=16777217, e=-128, m=16777217] [L58] COND TRUE 1 VAL [\old(e)=-128, \old(m)=16777217, e=-128, m=16777217] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-128, \old(m)=16777217, e=-128, m=16777217] [L77] m = m & ~ (1U << 24U) [L78] res = m | ((unsigned int ) (e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=-128, \old(m)=16777217, __retres4=1, e=-128, m=1, res=1] [L81] return (__retres4); [L253] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=1, ea=-128, eb=-126, ma=16777217, zero=0] [L253] a = base2flt(ma, ea) [L254] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=-126, \old(m)=16777216] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L30] COND FALSE !(! m) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L58] COND TRUE 1 VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L77] m = m & ~ (1U << 24U) [L78] res = m | ((unsigned int ) (e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=-126, \old(m)=16777216, __retres4=4294967295, e=-126, m=0, res=4294967295] [L81] return (__retres4); [L254] RET, EXPR base2flt(mb, eb) VAL [a=1, base2flt(mb, eb)=36028801313931263, ea=-128, eb=-126, ma=16777217, mb=16777216, zero=0] [L254] b = base2flt(mb, eb) [L256] COND FALSE !(a < zero) [L259] COND TRUE a > zero [L260] tmp = 1 [L264] sa = tmp [L266] COND FALSE !(b < zero) [L269] COND TRUE b > zero [L270] tmp___0 = 1 [L274] sb = tmp___0 [L277] CALL addflt(a, b) [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; [L95] COND TRUE a < b [L96] tmp = a [L97] a = b [L98] b = tmp VAL [\old(a)=1, \old(b)=4294967295, a=4294967295, b=1, tmp=1] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 [L114] mb = mb | (1U << 24U) VAL [\old(a)=1, \old(b)=4294967295, a=4294967295, b=1, ea=-2147483521, eb=-128, tmp=1] [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 46.9s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 978 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 891 mSDsluCounter, 3309 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3205 mSDsCounter, 163 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2845 IncrementalHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 163 mSolverCounterUnsat, 417 mSDtfsCounter, 2845 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 623 GetRequests, 341 SyntacticMatches, 9 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 28.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=3, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 218 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 444 NumberOfCodeBlocks, 428 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 541 ConstructedInterpolants, 0 QuantifiedInterpolants, 2082 SizeOfPredicates, 69 NumberOfNonLiveVariables, 674 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 160/228 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.8s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 63, DAG_INTERPRETER_EARLY_EXITS: 3, TOOLS_POST_APPLICATIONS: 58, TOOLS_POST_TIME: 0.6s, TOOLS_POST_CALL_APPLICATIONS: 27, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 18, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 103, TOOLS_QUANTIFIERELIM_TIME: 1.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 147, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 30, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 63, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 18, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 619, DAG_COMPRESSION_RETAINED_NODES: 154, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 01:57:08,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/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_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/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_27556e29-2a86-475b-9760-e1d82399e4bf/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 c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- 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 01:57:11,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:57:11,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:57:11,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:57:11,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:57:11,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:57:11,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:57:11,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:57:11,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:57:11,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:57:11,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:57:11,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:57:11,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:57:11,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:57:11,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:57:11,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:57:11,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:57:11,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:57:11,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:57:11,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:57:11,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:57:11,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:57:11,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:57:11,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:57:11,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:57:11,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:57:11,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:57:11,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:57:11,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:57:11,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:57:11,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:57:11,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:57:11,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:57:11,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:57:11,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:57:11,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:57:11,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:57:11,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:57:11,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:57:11,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:57:11,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:57:11,338 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 01:57:11,377 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:57:11,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:57:11,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:57:11,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:57:11,379 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:57:11,380 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:57:11,380 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:57:11,380 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:57:11,381 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:57:11,381 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:57:11,382 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:57:11,382 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:57:11,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:57:11,384 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:57:11,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:57:11,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:57:11,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:57:11,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:57:11,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:57:11,386 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:57:11,386 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:57:11,386 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:57:11,387 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:57:11,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:57:11,387 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:57:11,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:57:11,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:57:11,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:57:11,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:57:11,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:57:11,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:57:11,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:57:11,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:57:11,390 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:57:11,391 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:57:11,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:57:11,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:57:11,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:57:11,392 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_27556e29-2a86-475b-9760-e1d82399e4bf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2022-11-03 01:57:11,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:57:11,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:57:11,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:57:11,873 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:57:11,874 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:57:11,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-11-03 01:57:11,953 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/data/0f7bd1247/cb3d15aec7384126a6de2468cb353927/FLAGe7e7d20cb [2022-11-03 01:57:12,477 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:57:12,479 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-11-03 01:57:12,491 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/data/0f7bd1247/cb3d15aec7384126a6de2468cb353927/FLAGe7e7d20cb [2022-11-03 01:57:12,829 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/data/0f7bd1247/cb3d15aec7384126a6de2468cb353927 [2022-11-03 01:57:12,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:57:12,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:57:12,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:57:12,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:57:12,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:57:12,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:57:12" (1/1) ... [2022-11-03 01:57:12,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c42750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:12, skipping insertion in model container [2022-11-03 01:57:12,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:57:12" (1/1) ... [2022-11-03 01:57:12,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:57:12,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:57:13,150 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_27556e29-2a86-475b-9760-e1d82399e4bf/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-11-03 01:57:13,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:57:13,242 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:57:13,255 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_27556e29-2a86-475b-9760-e1d82399e4bf/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-11-03 01:57:13,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:57:13,295 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:57:13,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13 WrapperNode [2022-11-03 01:57:13,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:57:13,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:57:13,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:57:13,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:57:13,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,341 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 146 [2022-11-03 01:57:13,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:57:13,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:57:13,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:57:13,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:57:13,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,409 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:57:13,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:57:13,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:57:13,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:57:13,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13" (1/1) ... [2022-11-03 01:57:13,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:57:13,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:13,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:57:13,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:57:13,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:57:13,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 01:57:13,539 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-03 01:57:13,540 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-03 01:57:13,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:57:13,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:57:13,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:57:13,540 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:57:13,620 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:57:13,622 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:57:14,034 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:57:14,055 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:57:14,055 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 01:57:14,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:57:14 BoogieIcfgContainer [2022-11-03 01:57:14,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:57:14,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:57:14,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:57:14,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:57:14,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:57:12" (1/3) ... [2022-11-03 01:57:14,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634b796b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:57:14, skipping insertion in model container [2022-11-03 01:57:14,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:57:13" (2/3) ... [2022-11-03 01:57:14,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634b796b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:57:14, skipping insertion in model container [2022-11-03 01:57:14,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:57:14" (3/3) ... [2022-11-03 01:57:14,084 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2022-11-03 01:57:14,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:57:14,121 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:57:14,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:57:14,217 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;@4a68dd65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:57:14,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:57:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:57:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 01:57:14,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:14,235 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:14,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:14,245 INFO L85 PathProgramCache]: Analyzing trace with hash -760882007, now seen corresponding path program 1 times [2022-11-03 01:57:14,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:14,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761008313] [2022-11-03 01:57:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:14,263 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:14,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:14,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:14,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:57:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:14,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:14,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:57:14,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:57:14,785 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:14,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761008313] [2022-11-03 01:57:14,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761008313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:14,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1760335300] [2022-11-03 01:57:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:14,787 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:57:14,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:57:14,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:57:14,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2022-11-03 01:57:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:14,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:14,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:57:15,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:57:15,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1760335300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:15,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197550945] [2022-11-03 01:57:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:15,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:15,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:15,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:15,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:57:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:15,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:15,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:57:15,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:57:15,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197550945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:15,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:57:15,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 10 [2022-11-03 01:57:15,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33185871] [2022-11-03 01:57:15,374 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:15,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:57:15,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:15,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:57:15,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:15,412 INFO L87 Difference]: Start difference. First operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 01:57:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:16,220 INFO L93 Difference]: Finished difference Result 380 states and 641 transitions. [2022-11-03 01:57:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:57:16,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2022-11-03 01:57:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:16,246 INFO L225 Difference]: With dead ends: 380 [2022-11-03 01:57:16,248 INFO L226 Difference]: Without dead ends: 279 [2022-11-03 01:57:16,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:57:16,263 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 320 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:16,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 1661 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:57:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-03 01:57:16,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 112. [2022-11-03 01:57:16,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 94 states have (on average 1.425531914893617) internal successors, (134), 95 states have internal predecessors, (134), 14 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2022-11-03 01:57:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 168 transitions. [2022-11-03 01:57:16,349 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 168 transitions. Word has length 32 [2022-11-03 01:57:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:16,349 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 168 transitions. [2022-11-03 01:57:16,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 01:57:16,354 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 168 transitions. [2022-11-03 01:57:16,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:57:16,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:16,360 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:16,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:16,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:16,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:16,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:16,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:16,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1276417986, now seen corresponding path program 1 times [2022-11-03 01:57:16,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:16,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984144981] [2022-11-03 01:57:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:16,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:16,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:16,968 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:16,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:57:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:17,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:17,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:57:17,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:17,096 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:17,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984144981] [2022-11-03 01:57:17,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984144981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:17,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:17,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:17,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054693353] [2022-11-03 01:57:17,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:17,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:17,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:17,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:17,099 INFO L87 Difference]: Start difference. First operand 112 states and 168 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:17,212 INFO L93 Difference]: Finished difference Result 248 states and 373 transitions. [2022-11-03 01:57:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:17,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-03 01:57:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:17,216 INFO L225 Difference]: With dead ends: 248 [2022-11-03 01:57:17,216 INFO L226 Difference]: Without dead ends: 187 [2022-11-03 01:57:17,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:57:17,218 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 53 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:17,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 448 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-03 01:57:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2022-11-03 01:57:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 159 states have (on average 1.4150943396226414) internal successors, (225), 158 states have internal predecessors, (225), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-11-03 01:57:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 271 transitions. [2022-11-03 01:57:17,257 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 271 transitions. Word has length 40 [2022-11-03 01:57:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:17,258 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 271 transitions. [2022-11-03 01:57:17,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 271 transitions. [2022-11-03 01:57:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:57:17,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:17,262 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:17,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:17,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:17,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:17,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:17,489 INFO L85 PathProgramCache]: Analyzing trace with hash -596359616, now seen corresponding path program 1 times [2022-11-03 01:57:17,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:17,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273276270] [2022-11-03 01:57:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:17,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:17,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:17,492 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:17,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:57:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:17,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:57:17,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:57:17,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:17,658 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:17,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273276270] [2022-11-03 01:57:17,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273276270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:17,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:17,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:57:17,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297500733] [2022-11-03 01:57:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:17,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:57:17,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:17,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:57:17,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:57:17,663 INFO L87 Difference]: Start difference. First operand 183 states and 271 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:17,811 INFO L93 Difference]: Finished difference Result 256 states and 381 transitions. [2022-11-03 01:57:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-03 01:57:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:17,814 INFO L225 Difference]: With dead ends: 256 [2022-11-03 01:57:17,814 INFO L226 Difference]: Without dead ends: 201 [2022-11-03 01:57:17,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:57:17,820 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 105 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:17,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 533 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-03 01:57:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 174. [2022-11-03 01:57:17,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 152 states have (on average 1.394736842105263) internal successors, (212), 151 states have internal predecessors, (212), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2022-11-03 01:57:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 254 transitions. [2022-11-03 01:57:17,857 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 254 transitions. Word has length 40 [2022-11-03 01:57:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:17,858 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 254 transitions. [2022-11-03 01:57:17,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 254 transitions. [2022-11-03 01:57:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 01:57:17,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:17,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 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 01:57:17,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:18,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:18,077 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:18,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2082074321, now seen corresponding path program 1 times [2022-11-03 01:57:18,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:18,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956515026] [2022-11-03 01:57:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:18,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:18,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:18,083 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:18,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:57:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:18,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:57:18,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:57:18,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:18,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956515026] [2022-11-03 01:57:18,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956515026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:18,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:18,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:18,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67610318] [2022-11-03 01:57:18,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:18,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:18,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:18,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:18,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:18,208 INFO L87 Difference]: Start difference. First operand 174 states and 254 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:18,281 INFO L93 Difference]: Finished difference Result 321 states and 475 transitions. [2022-11-03 01:57:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:18,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-11-03 01:57:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:18,284 INFO L225 Difference]: With dead ends: 321 [2022-11-03 01:57:18,284 INFO L226 Difference]: Without dead ends: 255 [2022-11-03 01:57:18,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 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 01:57:18,286 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:18,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 338 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-03 01:57:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 223. [2022-11-03 01:57:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 199 states have (on average 1.3517587939698492) internal successors, (269), 198 states have internal predecessors, (269), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-11-03 01:57:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 315 transitions. [2022-11-03 01:57:18,317 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 315 transitions. Word has length 43 [2022-11-03 01:57:18,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:18,319 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 315 transitions. [2022-11-03 01:57:18,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:18,320 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 315 transitions. [2022-11-03 01:57:18,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 01:57:18,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:18,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:18,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:18,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:18,534 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:18,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1847325628, now seen corresponding path program 1 times [2022-11-03 01:57:18,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:18,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746099774] [2022-11-03 01:57:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:18,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:18,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:18,542 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:18,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:57:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:18,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:57:18,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:18,638 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 01:57:18,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:18,638 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:18,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746099774] [2022-11-03 01:57:18,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746099774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:18,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:18,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:18,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426167197] [2022-11-03 01:57:18,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:18,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:18,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:18,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:18,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:18,641 INFO L87 Difference]: Start difference. First operand 223 states and 315 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:57:18,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:18,716 INFO L93 Difference]: Finished difference Result 367 states and 518 transitions. [2022-11-03 01:57:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:18,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-11-03 01:57:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:18,721 INFO L225 Difference]: With dead ends: 367 [2022-11-03 01:57:18,721 INFO L226 Difference]: Without dead ends: 147 [2022-11-03 01:57:18,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 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 01:57:18,723 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 25 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:18,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 247 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-03 01:57:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 135. [2022-11-03 01:57:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.3277310924369747) internal successors, (158), 121 states have internal predecessors, (158), 11 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-03 01:57:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 185 transitions. [2022-11-03 01:57:18,743 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 185 transitions. Word has length 43 [2022-11-03 01:57:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:18,743 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 185 transitions. [2022-11-03 01:57:18,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:57:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 185 transitions. [2022-11-03 01:57:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 01:57:18,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:18,745 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:57:18,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:18,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:18,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:18,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1563397194, now seen corresponding path program 1 times [2022-11-03 01:57:18,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:18,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703931865] [2022-11-03 01:57:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:18,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:18,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:18,966 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:18,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:57:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:19,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:57:19,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:57:19,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:57:19,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:19,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703931865] [2022-11-03 01:57:19,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703931865] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:19,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:57:19,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-03 01:57:19,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996620028] [2022-11-03 01:57:19,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:19,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:19,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:57:19,331 INFO L87 Difference]: Start difference. First operand 135 states and 185 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:19,859 INFO L93 Difference]: Finished difference Result 267 states and 392 transitions. [2022-11-03 01:57:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:19,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-03 01:57:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:19,861 INFO L225 Difference]: With dead ends: 267 [2022-11-03 01:57:19,861 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 01:57:19,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:57:19,863 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 193 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:19,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 519 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:19,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 01:57:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2022-11-03 01:57:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 144 states have (on average 1.3194444444444444) internal successors, (190), 147 states have internal predecessors, (190), 14 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-03 01:57:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 223 transitions. [2022-11-03 01:57:19,878 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 223 transitions. Word has length 44 [2022-11-03 01:57:19,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:19,879 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 223 transitions. [2022-11-03 01:57:19,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:19,879 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 223 transitions. [2022-11-03 01:57:19,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 01:57:19,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:19,880 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:57:19,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:20,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:20,092 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash -956562740, now seen corresponding path program 1 times [2022-11-03 01:57:20,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:20,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091618361] [2022-11-03 01:57:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:20,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:20,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:20,095 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:20,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:57:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:20,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:57:20,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:57:20,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:20,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:20,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091618361] [2022-11-03 01:57:20,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091618361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:20,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:20,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:20,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416844783] [2022-11-03 01:57:20,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:20,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:20,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:20,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:20,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:20,194 INFO L87 Difference]: Start difference. First operand 163 states and 223 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:20,235 INFO L93 Difference]: Finished difference Result 170 states and 229 transitions. [2022-11-03 01:57:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:20,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-03 01:57:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:20,238 INFO L225 Difference]: With dead ends: 170 [2022-11-03 01:57:20,239 INFO L226 Difference]: Without dead ends: 163 [2022-11-03 01:57:20,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 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 01:57:20,240 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 5 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:20,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 377 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:20,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-03 01:57:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-11-03 01:57:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 144 states have (on average 1.2986111111111112) internal successors, (187), 147 states have internal predecessors, (187), 14 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-03 01:57:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 220 transitions. [2022-11-03 01:57:20,262 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 220 transitions. Word has length 44 [2022-11-03 01:57:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:20,262 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 220 transitions. [2022-11-03 01:57:20,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:20,263 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 220 transitions. [2022-11-03 01:57:20,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 01:57:20,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:20,264 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 01:57:20,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:20,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:20,476 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:20,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash -261265623, now seen corresponding path program 2 times [2022-11-03 01:57:20,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:20,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989916959] [2022-11-03 01:57:20,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:57:20,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:20,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:20,478 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:20,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:57:20,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-03 01:57:20,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:57:20,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:20,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:57:20,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:20,694 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989916959] [2022-11-03 01:57:20,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989916959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:20,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:20,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:20,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837067430] [2022-11-03 01:57:20,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:20,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:20,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:20,697 INFO L87 Difference]: Start difference. First operand 163 states and 220 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:20,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:20,787 INFO L93 Difference]: Finished difference Result 202 states and 277 transitions. [2022-11-03 01:57:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:20,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-03 01:57:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:20,790 INFO L225 Difference]: With dead ends: 202 [2022-11-03 01:57:20,790 INFO L226 Difference]: Without dead ends: 200 [2022-11-03 01:57:20,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:57:20,791 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 38 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:20,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 589 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-11-03 01:57:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-03 01:57:20,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2022-11-03 01:57:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 147 states have (on average 1.2925170068027212) internal successors, (190), 150 states have internal predecessors, (190), 14 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-03 01:57:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 223 transitions. [2022-11-03 01:57:20,809 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 223 transitions. Word has length 44 [2022-11-03 01:57:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:20,809 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 223 transitions. [2022-11-03 01:57:20,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 223 transitions. [2022-11-03 01:57:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 01:57:20,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:20,811 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 01:57:20,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:21,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:21,023 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash -204007321, now seen corresponding path program 1 times [2022-11-03 01:57:21,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:21,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757536777] [2022-11-03 01:57:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:21,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:21,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:21,025 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:21,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:57:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:21,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:57:21,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:57:21,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:21,198 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:21,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757536777] [2022-11-03 01:57:21,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757536777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:21,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:21,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:21,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448315706] [2022-11-03 01:57:21,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:21,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:21,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:21,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:21,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:21,201 INFO L87 Difference]: Start difference. First operand 167 states and 223 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:21,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:21,296 INFO L93 Difference]: Finished difference Result 212 states and 289 transitions. [2022-11-03 01:57:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:21,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-03 01:57:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:21,300 INFO L225 Difference]: With dead ends: 212 [2022-11-03 01:57:21,300 INFO L226 Difference]: Without dead ends: 210 [2022-11-03 01:57:21,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:57:21,301 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 38 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:21,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 460 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-11-03 01:57:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-03 01:57:21,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 171. [2022-11-03 01:57:21,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 150 states have (on average 1.2866666666666666) internal successors, (193), 153 states have internal predecessors, (193), 14 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-03 01:57:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 226 transitions. [2022-11-03 01:57:21,322 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 226 transitions. Word has length 44 [2022-11-03 01:57:21,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:21,322 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 226 transitions. [2022-11-03 01:57:21,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:21,322 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 226 transitions. [2022-11-03 01:57:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 01:57:21,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:21,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:21,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:21,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:21,536 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:21,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:21,537 INFO L85 PathProgramCache]: Analyzing trace with hash 561980754, now seen corresponding path program 1 times [2022-11-03 01:57:21,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:21,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093060389] [2022-11-03 01:57:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:21,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:21,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:21,538 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:21,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:57:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:21,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:57:21,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:57:21,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:21,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:21,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093060389] [2022-11-03 01:57:21,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093060389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:21,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:21,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:21,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219557248] [2022-11-03 01:57:21,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:21,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:21,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:21,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:21,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:21,632 INFO L87 Difference]: Start difference. First operand 171 states and 226 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:21,682 INFO L93 Difference]: Finished difference Result 283 states and 384 transitions. [2022-11-03 01:57:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:21,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-11-03 01:57:21,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:21,684 INFO L225 Difference]: With dead ends: 283 [2022-11-03 01:57:21,685 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 01:57:21,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 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 01:57:21,686 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 77 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:21,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 312 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 01:57:21,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 190. [2022-11-03 01:57:21,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 168 states have (on average 1.2916666666666667) internal successors, (217), 170 states have internal predecessors, (217), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (20), 17 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-03 01:57:21,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 252 transitions. [2022-11-03 01:57:21,710 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 252 transitions. Word has length 45 [2022-11-03 01:57:21,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:21,711 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 252 transitions. [2022-11-03 01:57:21,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 252 transitions. [2022-11-03 01:57:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 01:57:21,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:21,713 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:57:21,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:21,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:21,925 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:21,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2079579127, now seen corresponding path program 1 times [2022-11-03 01:57:21,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:21,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564495128] [2022-11-03 01:57:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:21,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:21,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:21,927 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:21,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:57:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:21,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:57:21,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:57:22,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:22,002 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:22,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564495128] [2022-11-03 01:57:22,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564495128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:22,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:22,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:22,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417129797] [2022-11-03 01:57:22,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:22,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:22,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:22,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:22,005 INFO L87 Difference]: Start difference. First operand 190 states and 252 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:22,059 INFO L93 Difference]: Finished difference Result 205 states and 268 transitions. [2022-11-03 01:57:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:57:22,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-11-03 01:57:22,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:22,065 INFO L225 Difference]: With dead ends: 205 [2022-11-03 01:57:22,065 INFO L226 Difference]: Without dead ends: 166 [2022-11-03 01:57:22,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 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 01:57:22,066 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:22,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-03 01:57:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-11-03 01:57:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 144 states have (on average 1.3055555555555556) internal successors, (188), 147 states have internal predecessors, (188), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (18), 16 states have call predecessors, (18), 14 states have call successors, (18) [2022-11-03 01:57:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 221 transitions. [2022-11-03 01:57:22,084 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 221 transitions. Word has length 48 [2022-11-03 01:57:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:22,085 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 221 transitions. [2022-11-03 01:57:22,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 221 transitions. [2022-11-03 01:57:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 01:57:22,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:22,086 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 01:57:22,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:22,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:22,298 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:22,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:22,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1609971577, now seen corresponding path program 1 times [2022-11-03 01:57:22,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:22,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057714327] [2022-11-03 01:57:22,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:22,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:22,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:22,301 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:22,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:57:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:22,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:57:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:57:22,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:22,419 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:22,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057714327] [2022-11-03 01:57:22,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057714327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:22,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:22,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:22,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862910604] [2022-11-03 01:57:22,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:22,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:22,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:22,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:22,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:22,421 INFO L87 Difference]: Start difference. First operand 166 states and 221 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:22,539 INFO L93 Difference]: Finished difference Result 241 states and 326 transitions. [2022-11-03 01:57:22,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:22,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-11-03 01:57:22,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:22,541 INFO L225 Difference]: With dead ends: 241 [2022-11-03 01:57:22,542 INFO L226 Difference]: Without dead ends: 199 [2022-11-03 01:57:22,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:57:22,543 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 141 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:22,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 332 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:22,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-03 01:57:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2022-11-03 01:57:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 144 states have (on average 1.2916666666666667) internal successors, (186), 147 states have internal predecessors, (186), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (18), 16 states have call predecessors, (18), 14 states have call successors, (18) [2022-11-03 01:57:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 219 transitions. [2022-11-03 01:57:22,564 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 219 transitions. Word has length 49 [2022-11-03 01:57:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:22,565 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 219 transitions. [2022-11-03 01:57:22,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 219 transitions. [2022-11-03 01:57:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 01:57:22,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:22,566 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-03 01:57:22,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:22,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:22,778 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:22,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:22,778 INFO L85 PathProgramCache]: Analyzing trace with hash -908906999, now seen corresponding path program 1 times [2022-11-03 01:57:22,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:22,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134492387] [2022-11-03 01:57:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:22,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:22,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:22,780 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:22,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:57:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:22,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:57:22,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:57:22,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:22,874 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:22,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134492387] [2022-11-03 01:57:22,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134492387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:22,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:22,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:22,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362365482] [2022-11-03 01:57:22,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:22,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:22,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:22,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:22,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:22,877 INFO L87 Difference]: Start difference. First operand 166 states and 219 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:22,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:22,983 INFO L93 Difference]: Finished difference Result 239 states and 312 transitions. [2022-11-03 01:57:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:22,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-11-03 01:57:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:22,985 INFO L225 Difference]: With dead ends: 239 [2022-11-03 01:57:22,985 INFO L226 Difference]: Without dead ends: 212 [2022-11-03 01:57:22,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 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 01:57:22,986 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 86 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:22,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 286 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-03 01:57:23,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 166. [2022-11-03 01:57:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 144 states have (on average 1.2847222222222223) internal successors, (185), 147 states have internal predecessors, (185), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (18), 16 states have call predecessors, (18), 14 states have call successors, (18) [2022-11-03 01:57:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 218 transitions. [2022-11-03 01:57:23,019 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 218 transitions. Word has length 49 [2022-11-03 01:57:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:23,019 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 218 transitions. [2022-11-03 01:57:23,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 218 transitions. [2022-11-03 01:57:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 01:57:23,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:23,021 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:23,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:23,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:23,232 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:23,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1552744902, now seen corresponding path program 1 times [2022-11-03 01:57:23,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:23,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268504189] [2022-11-03 01:57:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:23,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:23,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:23,234 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:23,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:57:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:23,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:57:23,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:57:23,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:23,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:23,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268504189] [2022-11-03 01:57:23,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268504189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:23,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:23,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:57:23,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532214114] [2022-11-03 01:57:23,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:23,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:57:23,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:23,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:57:23,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:57:23,375 INFO L87 Difference]: Start difference. First operand 166 states and 218 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:23,733 INFO L93 Difference]: Finished difference Result 270 states and 370 transitions. [2022-11-03 01:57:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:23,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-11-03 01:57:23,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:23,735 INFO L225 Difference]: With dead ends: 270 [2022-11-03 01:57:23,735 INFO L226 Difference]: Without dead ends: 246 [2022-11-03 01:57:23,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:23,736 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 180 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:23,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 572 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:57:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-03 01:57:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 199. [2022-11-03 01:57:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 173 states have (on average 1.283236994219653) internal successors, (222), 177 states have internal predecessors, (222), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2022-11-03 01:57:23,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 263 transitions. [2022-11-03 01:57:23,759 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 263 transitions. Word has length 50 [2022-11-03 01:57:23,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:23,760 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 263 transitions. [2022-11-03 01:57:23,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:23,760 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 263 transitions. [2022-11-03 01:57:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 01:57:23,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:23,761 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:23,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:23,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:23,983 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:23,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1182826734, now seen corresponding path program 1 times [2022-11-03 01:57:23,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:23,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302639779] [2022-11-03 01:57:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:23,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:23,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:23,986 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:24,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:57:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:24,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:57:24,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:57:24,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:24,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:24,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302639779] [2022-11-03 01:57:24,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302639779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:24,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:24,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:24,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422158040] [2022-11-03 01:57:24,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:24,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:24,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:24,082 INFO L87 Difference]: Start difference. First operand 199 states and 263 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:24,147 INFO L93 Difference]: Finished difference Result 241 states and 312 transitions. [2022-11-03 01:57:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:57:24,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-11-03 01:57:24,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:24,149 INFO L225 Difference]: With dead ends: 241 [2022-11-03 01:57:24,149 INFO L226 Difference]: Without dead ends: 207 [2022-11-03 01:57:24,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 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 01:57:24,152 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 87 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:24,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 230 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-03 01:57:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 199. [2022-11-03 01:57:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 173 states have (on average 1.2138728323699421) internal successors, (210), 177 states have internal predecessors, (210), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2022-11-03 01:57:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 251 transitions. [2022-11-03 01:57:24,181 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 251 transitions. Word has length 50 [2022-11-03 01:57:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:24,181 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 251 transitions. [2022-11-03 01:57:24,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 251 transitions. [2022-11-03 01:57:24,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 01:57:24,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:24,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:24,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-03 01:57:24,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:24,403 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:24,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1332385442, now seen corresponding path program 1 times [2022-11-03 01:57:24,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:24,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102750988] [2022-11-03 01:57:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:24,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:24,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:24,406 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:24,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:57:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:24,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:57:24,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:57:24,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:24,487 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:24,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102750988] [2022-11-03 01:57:24,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102750988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:24,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:24,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:24,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626550813] [2022-11-03 01:57:24,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:24,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:24,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:24,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:24,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:24,492 INFO L87 Difference]: Start difference. First operand 199 states and 251 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:24,535 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2022-11-03 01:57:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:57:24,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-11-03 01:57:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:24,537 INFO L225 Difference]: With dead ends: 208 [2022-11-03 01:57:24,537 INFO L226 Difference]: Without dead ends: 167 [2022-11-03 01:57:24,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 01:57:24,538 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:24,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 279 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-03 01:57:24,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2022-11-03 01:57:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 138 states have (on average 1.2246376811594204) internal successors, (169), 143 states have internal predecessors, (169), 16 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2022-11-03 01:57:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 201 transitions. [2022-11-03 01:57:24,559 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 201 transitions. Word has length 52 [2022-11-03 01:57:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:24,560 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 201 transitions. [2022-11-03 01:57:24,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 201 transitions. [2022-11-03 01:57:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 01:57:24,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:24,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:24,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-03 01:57:24,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:24,778 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:24,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:24,779 INFO L85 PathProgramCache]: Analyzing trace with hash -444512686, now seen corresponding path program 1 times [2022-11-03 01:57:24,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:24,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584841332] [2022-11-03 01:57:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:24,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:24,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:24,781 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:24,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 01:57:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:24,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:57:24,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:57:24,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:24,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:24,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584841332] [2022-11-03 01:57:24,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584841332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:24,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:24,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:24,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460238447] [2022-11-03 01:57:24,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:24,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:24,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:24,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:24,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:24,904 INFO L87 Difference]: Start difference. First operand 161 states and 201 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:25,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:25,131 INFO L93 Difference]: Finished difference Result 234 states and 301 transitions. [2022-11-03 01:57:25,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:25,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-11-03 01:57:25,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:25,133 INFO L225 Difference]: With dead ends: 234 [2022-11-03 01:57:25,133 INFO L226 Difference]: Without dead ends: 185 [2022-11-03 01:57:25,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:57:25,134 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 87 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:25,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 487 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:57:25,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-03 01:57:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 135. [2022-11-03 01:57:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 112 states have (on average 1.25) internal successors, (140), 117 states have internal predecessors, (140), 17 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 01:57:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 172 transitions. [2022-11-03 01:57:25,162 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 172 transitions. Word has length 52 [2022-11-03 01:57:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:25,163 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 172 transitions. [2022-11-03 01:57:25,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:57:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 172 transitions. [2022-11-03 01:57:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 01:57:25,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:25,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:25,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:25,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:25,377 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:25,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:25,377 INFO L85 PathProgramCache]: Analyzing trace with hash -71376074, now seen corresponding path program 1 times [2022-11-03 01:57:25,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:25,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245884907] [2022-11-03 01:57:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:25,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:25,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:25,379 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:25,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:57:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:57:25,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:57:27,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:27,612 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:27,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245884907] [2022-11-03 01:57:27,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245884907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:27,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:27,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:57:27,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145710569] [2022-11-03 01:57:27,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:27,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:57:27,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:27,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:57:27,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:57:27,615 INFO L87 Difference]: Start difference. First operand 135 states and 172 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:57:27,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:27,659 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2022-11-03 01:57:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:27,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-11-03 01:57:27,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:27,660 INFO L225 Difference]: With dead ends: 143 [2022-11-03 01:57:27,661 INFO L226 Difference]: Without dead ends: 141 [2022-11-03 01:57:27,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:57:27,662 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 9 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:27,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 481 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 33 Unchecked, 0.0s Time] [2022-11-03 01:57:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-03 01:57:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-03 01:57:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 122 states have internal predecessors, (143), 19 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 01:57:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 179 transitions. [2022-11-03 01:57:27,681 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 179 transitions. Word has length 54 [2022-11-03 01:57:27,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:27,682 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 179 transitions. [2022-11-03 01:57:27,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:57:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 179 transitions. [2022-11-03 01:57:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 01:57:27,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:27,683 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:27,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:27,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:27,895 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:27,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:27,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1768875186, now seen corresponding path program 1 times [2022-11-03 01:57:27,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:27,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847603349] [2022-11-03 01:57:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:27,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:27,897 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:27,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:57:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:27,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:57:27,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:57:32,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:32,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:32,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847603349] [2022-11-03 01:57:32,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847603349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:32,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:32,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:57:32,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385111023] [2022-11-03 01:57:32,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:32,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:57:32,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:32,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:57:32,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2022-11-03 01:57:32,480 INFO L87 Difference]: Start difference. First operand 141 states and 179 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:57:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:32,534 INFO L93 Difference]: Finished difference Result 183 states and 233 transitions. [2022-11-03 01:57:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-11-03 01:57:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:32,536 INFO L225 Difference]: With dead ends: 183 [2022-11-03 01:57:32,536 INFO L226 Difference]: Without dead ends: 181 [2022-11-03 01:57:32,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2022-11-03 01:57:32,537 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 37 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:32,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 592 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 42 Unchecked, 0.0s Time] [2022-11-03 01:57:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-03 01:57:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 139. [2022-11-03 01:57:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 120 states have internal predecessors, (143), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 01:57:32,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2022-11-03 01:57:32,558 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 55 [2022-11-03 01:57:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:32,558 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2022-11-03 01:57:32,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:57:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2022-11-03 01:57:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 01:57:32,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:32,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:32,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:32,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:32,772 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:32,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2067393215, now seen corresponding path program 1 times [2022-11-03 01:57:32,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:32,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097922233] [2022-11-03 01:57:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:32,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:32,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:32,775 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:32,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:57:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:32,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 01:57:32,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:57:33,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:33,470 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:33,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097922233] [2022-11-03 01:57:33,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097922233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:33,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:33,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-03 01:57:33,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533546871] [2022-11-03 01:57:33,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:33,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:57:33,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:33,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:57:33,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:57:33,472 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:57:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:35,098 INFO L93 Difference]: Finished difference Result 201 states and 256 transitions. [2022-11-03 01:57:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:57:35,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-11-03 01:57:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:35,102 INFO L225 Difference]: With dead ends: 201 [2022-11-03 01:57:35,102 INFO L226 Difference]: Without dead ends: 189 [2022-11-03 01:57:35,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:57:35,103 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 164 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:35,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 914 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 01:57:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-03 01:57:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 139. [2022-11-03 01:57:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 120 states have internal predecessors, (141), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 01:57:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 173 transitions. [2022-11-03 01:57:35,134 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 173 transitions. Word has length 58 [2022-11-03 01:57:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:35,135 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 173 transitions. [2022-11-03 01:57:35,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:57:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 173 transitions. [2022-11-03 01:57:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:57:35,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:35,136 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:35,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:35,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:35,348 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:35,348 INFO L85 PathProgramCache]: Analyzing trace with hash 589240327, now seen corresponding path program 1 times [2022-11-03 01:57:35,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:35,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793546461] [2022-11-03 01:57:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:35,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:35,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:35,349 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:35,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:57:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:35,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:35,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:57:35,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:35,459 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:35,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793546461] [2022-11-03 01:57:35,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793546461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:35,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:35,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:35,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424588502] [2022-11-03 01:57:35,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:35,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:35,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:35,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:35,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:35,464 INFO L87 Difference]: Start difference. First operand 139 states and 173 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:57:35,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:35,545 INFO L93 Difference]: Finished difference Result 158 states and 193 transitions. [2022-11-03 01:57:35,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:35,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2022-11-03 01:57:35,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:35,547 INFO L225 Difference]: With dead ends: 158 [2022-11-03 01:57:35,547 INFO L226 Difference]: Without dead ends: 156 [2022-11-03 01:57:35,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:57:35,548 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 40 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:35,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 484 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-03 01:57:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2022-11-03 01:57:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 123 states have internal predecessors, (144), 17 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 01:57:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 176 transitions. [2022-11-03 01:57:35,579 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 176 transitions. Word has length 60 [2022-11-03 01:57:35,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:35,579 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 176 transitions. [2022-11-03 01:57:35,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:57:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 176 transitions. [2022-11-03 01:57:35,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:57:35,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:35,581 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:35,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:35,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:35,793 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:35,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:35,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1364362596, now seen corresponding path program 1 times [2022-11-03 01:57:35,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:35,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158354986] [2022-11-03 01:57:35,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:35,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:35,795 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:35,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:57:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:35,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:57:35,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:57:36,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:36,357 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:36,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158354986] [2022-11-03 01:57:36,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158354986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:36,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:36,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 01:57:36,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979813] [2022-11-03 01:57:36,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:36,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:57:36,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:36,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:57:36,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:57:36,360 INFO L87 Difference]: Start difference. First operand 143 states and 176 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:57:39,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:39,431 INFO L93 Difference]: Finished difference Result 371 states and 485 transitions. [2022-11-03 01:57:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:57:39,434 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-11-03 01:57:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:39,436 INFO L225 Difference]: With dead ends: 371 [2022-11-03 01:57:39,436 INFO L226 Difference]: Without dead ends: 339 [2022-11-03 01:57:39,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:57:39,437 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 432 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:39,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1028 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 01:57:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-03 01:57:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 169. [2022-11-03 01:57:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 141 states have (on average 1.2056737588652482) internal successors, (170), 147 states have internal predecessors, (170), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-03 01:57:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 208 transitions. [2022-11-03 01:57:39,473 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 208 transitions. Word has length 60 [2022-11-03 01:57:39,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:39,474 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 208 transitions. [2022-11-03 01:57:39,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:57:39,474 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 208 transitions. [2022-11-03 01:57:39,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:57:39,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:39,475 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:39,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:39,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:39,687 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:39,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash 865353347, now seen corresponding path program 1 times [2022-11-03 01:57:39,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:39,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474699891] [2022-11-03 01:57:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:39,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:39,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:39,690 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:39,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:57:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:39,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:39,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:57:39,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:39,794 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:39,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474699891] [2022-11-03 01:57:39,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474699891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:39,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:39,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:39,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477310971] [2022-11-03 01:57:39,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:39,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:39,797 INFO L87 Difference]: Start difference. First operand 169 states and 208 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:57:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:39,893 INFO L93 Difference]: Finished difference Result 191 states and 234 transitions. [2022-11-03 01:57:39,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:39,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2022-11-03 01:57:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:39,894 INFO L225 Difference]: With dead ends: 191 [2022-11-03 01:57:39,894 INFO L226 Difference]: Without dead ends: 189 [2022-11-03 01:57:39,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:57:39,896 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 34 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:39,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 480 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-03 01:57:39,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 174. [2022-11-03 01:57:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 151 states have internal predecessors, (173), 21 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-03 01:57:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 213 transitions. [2022-11-03 01:57:39,935 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 213 transitions. Word has length 60 [2022-11-03 01:57:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:39,937 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 213 transitions. [2022-11-03 01:57:39,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:57:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 213 transitions. [2022-11-03 01:57:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 01:57:39,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:39,940 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:39,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:40,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:40,152 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:40,152 INFO L85 PathProgramCache]: Analyzing trace with hash 921322142, now seen corresponding path program 1 times [2022-11-03 01:57:40,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:40,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137007168] [2022-11-03 01:57:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:40,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:40,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:40,154 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:40,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:57:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:40,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:57:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:57:41,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:41,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:41,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137007168] [2022-11-03 01:57:41,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137007168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:41,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:41,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-03 01:57:41,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111201877] [2022-11-03 01:57:41,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:41,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:57:41,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:41,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:57:41,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:57:41,331 INFO L87 Difference]: Start difference. First operand 174 states and 213 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:57:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:41,802 INFO L93 Difference]: Finished difference Result 301 states and 380 transitions. [2022-11-03 01:57:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:57:41,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2022-11-03 01:57:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:41,805 INFO L225 Difference]: With dead ends: 301 [2022-11-03 01:57:41,805 INFO L226 Difference]: Without dead ends: 281 [2022-11-03 01:57:41,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:57:41,806 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 76 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 489 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:41,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1171 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 489 Unchecked, 0.1s Time] [2022-11-03 01:57:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-03 01:57:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2022-11-03 01:57:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 151 states have (on average 1.205298013245033) internal successors, (182), 158 states have internal predecessors, (182), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-03 01:57:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 224 transitions. [2022-11-03 01:57:41,846 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 224 transitions. Word has length 65 [2022-11-03 01:57:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:41,846 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 224 transitions. [2022-11-03 01:57:41,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:57:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 224 transitions. [2022-11-03 01:57:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 01:57:41,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:41,848 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:41,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 01:57:42,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:42,060 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1450417120, now seen corresponding path program 1 times [2022-11-03 01:57:42,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:42,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241974388] [2022-11-03 01:57:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:42,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:42,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:42,062 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:42,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:57:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:42,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:57:42,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:57:44,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:44,343 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:44,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241974388] [2022-11-03 01:57:44,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241974388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:44,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:44,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:57:44,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366290460] [2022-11-03 01:57:44,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:44,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:57:44,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:57:44,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:44,344 INFO L87 Difference]: Start difference. First operand 182 states and 224 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:57:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:44,487 INFO L93 Difference]: Finished difference Result 247 states and 309 transitions. [2022-11-03 01:57:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:57:44,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2022-11-03 01:57:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:44,489 INFO L225 Difference]: With dead ends: 247 [2022-11-03 01:57:44,489 INFO L226 Difference]: Without dead ends: 227 [2022-11-03 01:57:44,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:57:44,490 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 24 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:44,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 677 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 255 Unchecked, 0.0s Time] [2022-11-03 01:57:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-03 01:57:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 181. [2022-11-03 01:57:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 150 states have (on average 1.2) internal successors, (180), 157 states have internal predecessors, (180), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-03 01:57:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 222 transitions. [2022-11-03 01:57:44,533 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 222 transitions. Word has length 65 [2022-11-03 01:57:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:44,533 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 222 transitions. [2022-11-03 01:57:44,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:57:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 222 transitions. [2022-11-03 01:57:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 01:57:44,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:44,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:44,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:44,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:44,747 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:44,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:44,747 INFO L85 PathProgramCache]: Analyzing trace with hash -957629534, now seen corresponding path program 1 times [2022-11-03 01:57:44,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:44,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546729354] [2022-11-03 01:57:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:44,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:44,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:44,749 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:44,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:57:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:44,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 01:57:44,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:57:46,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:46,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:46,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546729354] [2022-11-03 01:57:46,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546729354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:46,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1130665110] [2022-11-03 01:57:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:46,337 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:57:46,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:57:46,338 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:57:46,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 01:57:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:46,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:57:46,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:57:48,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:48,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1130665110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:48,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727676054] [2022-11-03 01:57:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:48,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:48,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:48,381 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:48,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 01:57:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:57:48,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:57:49,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:49,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727676054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:49,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:57:49,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 22 [2022-11-03 01:57:49,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756439690] [2022-11-03 01:57:49,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:49,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 01:57:49,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 01:57:49,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:57:49,133 INFO L87 Difference]: Start difference. First operand 181 states and 222 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:57:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:49,464 INFO L93 Difference]: Finished difference Result 294 states and 369 transitions. [2022-11-03 01:57:49,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:57:49,465 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 66 [2022-11-03 01:57:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:49,466 INFO L225 Difference]: With dead ends: 294 [2022-11-03 01:57:49,467 INFO L226 Difference]: Without dead ends: 274 [2022-11-03 01:57:49,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 197 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:57:49,469 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 48 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:49,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1452 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 286 Unchecked, 0.1s Time] [2022-11-03 01:57:49,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-03 01:57:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 183. [2022-11-03 01:57:49,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 152 states have (on average 1.2105263157894737) internal successors, (184), 159 states have internal predecessors, (184), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-03 01:57:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 226 transitions. [2022-11-03 01:57:49,530 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 226 transitions. Word has length 66 [2022-11-03 01:57:49,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:49,530 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 226 transitions. [2022-11-03 01:57:49,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 01:57:49,531 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 226 transitions. [2022-11-03 01:57:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 01:57:49,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:49,534 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:49,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:49,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-03 01:57:49,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 01:57:50,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:50,154 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:50,155 INFO L85 PathProgramCache]: Analyzing trace with hash -660447408, now seen corresponding path program 1 times [2022-11-03 01:57:50,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:50,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974355802] [2022-11-03 01:57:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:50,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:50,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:50,156 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:50,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 01:57:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:50,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:57:50,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:57:50,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:50,834 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:50,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974355802] [2022-11-03 01:57:50,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974355802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:50,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:50,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 01:57:50,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347564515] [2022-11-03 01:57:50,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:50,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:57:50,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:50,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:57:50,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:57:50,836 INFO L87 Difference]: Start difference. First operand 183 states and 226 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:57:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:52,483 INFO L93 Difference]: Finished difference Result 269 states and 335 transitions. [2022-11-03 01:57:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:57:52,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-11-03 01:57:52,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:52,486 INFO L225 Difference]: With dead ends: 269 [2022-11-03 01:57:52,486 INFO L226 Difference]: Without dead ends: 261 [2022-11-03 01:57:52,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:57:52,487 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 122 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:52,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 788 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:57:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-03 01:57:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 184. [2022-11-03 01:57:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 153 states have (on average 1.2026143790849673) internal successors, (184), 160 states have internal predecessors, (184), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-03 01:57:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 226 transitions. [2022-11-03 01:57:52,539 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 226 transitions. Word has length 66 [2022-11-03 01:57:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:52,540 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 226 transitions. [2022-11-03 01:57:52,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:57:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 226 transitions. [2022-11-03 01:57:52,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 01:57:52,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:52,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:52,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:52,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:52,760 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1467102624, now seen corresponding path program 1 times [2022-11-03 01:57:52,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:52,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367013335] [2022-11-03 01:57:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:52,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:52,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:52,761 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:52,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 01:57:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:52,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:52,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:57:52,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:52,989 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:52,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367013335] [2022-11-03 01:57:52,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367013335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:52,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:52,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:57:52,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371132334] [2022-11-03 01:57:52,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:52,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:57:52,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:52,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:57:52,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:57:52,991 INFO L87 Difference]: Start difference. First operand 184 states and 226 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:57:53,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:53,264 INFO L93 Difference]: Finished difference Result 311 states and 391 transitions. [2022-11-03 01:57:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:53,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-11-03 01:57:53,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:53,266 INFO L225 Difference]: With dead ends: 311 [2022-11-03 01:57:53,267 INFO L226 Difference]: Without dead ends: 291 [2022-11-03 01:57:53,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:57:53,268 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 90 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:53,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 746 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 188 Unchecked, 0.1s Time] [2022-11-03 01:57:53,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-03 01:57:53,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 174. [2022-11-03 01:57:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 145 states have (on average 1.186206896551724) internal successors, (172), 151 states have internal predecessors, (172), 20 states have call successors, (20), 7 states have call predecessors, (20), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-03 01:57:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2022-11-03 01:57:53,316 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 66 [2022-11-03 01:57:53,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:53,316 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2022-11-03 01:57:53,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:57:53,317 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2022-11-03 01:57:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 01:57:53,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:53,318 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:53,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:53,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:53,529 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:53,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:53,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1151744600, now seen corresponding path program 1 times [2022-11-03 01:57:53,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:53,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390890402] [2022-11-03 01:57:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:53,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:53,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:53,531 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:53,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 01:57:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:53,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:53,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:57:53,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:53,638 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:53,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390890402] [2022-11-03 01:57:53,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390890402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:53,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:53,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:53,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473562977] [2022-11-03 01:57:53,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:53,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:53,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:53,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:53,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:53,640 INFO L87 Difference]: Start difference. First operand 174 states and 210 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 01:57:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:53,747 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2022-11-03 01:57:53,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:53,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2022-11-03 01:57:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:53,750 INFO L225 Difference]: With dead ends: 209 [2022-11-03 01:57:53,750 INFO L226 Difference]: Without dead ends: 195 [2022-11-03 01:57:53,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:57:53,751 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 30 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:53,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 466 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:53,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-03 01:57:53,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 170. [2022-11-03 01:57:53,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 148 states have internal predecessors, (164), 21 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-03 01:57:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 204 transitions. [2022-11-03 01:57:53,794 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 204 transitions. Word has length 68 [2022-11-03 01:57:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:53,794 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 204 transitions. [2022-11-03 01:57:53,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 01:57:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 204 transitions. [2022-11-03 01:57:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 01:57:53,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:53,796 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:53,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:54,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:54,007 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:54,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash 106001302, now seen corresponding path program 1 times [2022-11-03 01:57:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:54,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143435645] [2022-11-03 01:57:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:54,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:54,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:54,009 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:54,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 01:57:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:54,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:54,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:57:54,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:54,098 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143435645] [2022-11-03 01:57:54,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143435645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:54,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:54,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:54,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854556995] [2022-11-03 01:57:54,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:54,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:54,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:54,100 INFO L87 Difference]: Start difference. First operand 170 states and 204 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 01:57:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:54,217 INFO L93 Difference]: Finished difference Result 199 states and 236 transitions. [2022-11-03 01:57:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:54,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2022-11-03 01:57:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:54,219 INFO L225 Difference]: With dead ends: 199 [2022-11-03 01:57:54,219 INFO L226 Difference]: Without dead ends: 185 [2022-11-03 01:57:54,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:57:54,220 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 30 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:54,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 466 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-03 01:57:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2022-11-03 01:57:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 123 states have internal predecessors, (140), 16 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 01:57:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2022-11-03 01:57:54,262 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 68 [2022-11-03 01:57:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:54,263 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2022-11-03 01:57:54,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 01:57:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2022-11-03 01:57:54,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 01:57:54,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:54,264 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:54,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:54,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:54,476 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:54,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1565040980, now seen corresponding path program 1 times [2022-11-03 01:57:54,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:54,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130041035] [2022-11-03 01:57:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:54,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:54,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:54,478 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:54,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 01:57:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:54,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:57:54,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:57:54,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:54,578 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:54,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130041035] [2022-11-03 01:57:54,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130041035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:54,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:54,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:54,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100203700] [2022-11-03 01:57:54,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:54,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:54,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:54,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:54,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:54,580 INFO L87 Difference]: Start difference. First operand 142 states and 171 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:57:54,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:54,637 INFO L93 Difference]: Finished difference Result 170 states and 200 transitions. [2022-11-03 01:57:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:57:54,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2022-11-03 01:57:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:54,638 INFO L225 Difference]: With dead ends: 170 [2022-11-03 01:57:54,638 INFO L226 Difference]: Without dead ends: 115 [2022-11-03 01:57:54,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 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 01:57:54,639 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 43 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:54,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 233 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-03 01:57:54,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2022-11-03 01:57:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 93 states have internal predecessors, (105), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:57:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 123 transitions. [2022-11-03 01:57:54,661 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 123 transitions. Word has length 70 [2022-11-03 01:57:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:54,661 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 123 transitions. [2022-11-03 01:57:54,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:57:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 123 transitions. [2022-11-03 01:57:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 01:57:54,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:54,663 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:54,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-03 01:57:54,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:54,870 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:54,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:54,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1885920814, now seen corresponding path program 1 times [2022-11-03 01:57:54,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:54,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801880490] [2022-11-03 01:57:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:54,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:54,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:54,872 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:54,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 01:57:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:54,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:57:54,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:57:55,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:55,752 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801880490] [2022-11-03 01:57:55,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801880490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [759878433] [2022-11-03 01:57:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:55,753 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:57:55,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:57:55,754 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:57:55,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 01:57:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:55,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:57:55,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 01:57:56,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:56,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [759878433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:56,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:57:56,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-03 01:57:56,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440803237] [2022-11-03 01:57:56,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:56,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:56,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:56,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:57:56,042 INFO L87 Difference]: Start difference. First operand 107 states and 123 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:57:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:56,391 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2022-11-03 01:57:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:57:56,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2022-11-03 01:57:56,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:56,393 INFO L225 Difference]: With dead ends: 175 [2022-11-03 01:57:56,393 INFO L226 Difference]: Without dead ends: 127 [2022-11-03 01:57:56,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:57:56,395 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 121 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:56,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 247 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-03 01:57:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 107. [2022-11-03 01:57:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 91 states have (on average 1.1428571428571428) internal successors, (104), 93 states have internal predecessors, (104), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:57:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2022-11-03 01:57:56,422 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 70 [2022-11-03 01:57:56,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:56,422 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2022-11-03 01:57:56,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:57:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2022-11-03 01:57:56,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 01:57:56,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:56,423 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:56,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 01:57:56,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-03 01:57:56,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:57:56,824 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:56,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2134286868, now seen corresponding path program 1 times [2022-11-03 01:57:56,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:56,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019348093] [2022-11-03 01:57:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:56,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:56,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:56,826 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:56,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 01:57:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:56,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:57:56,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:57:57,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:57,481 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:57,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019348093] [2022-11-03 01:57:57,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019348093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:57,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:57,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:57:57,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756510846] [2022-11-03 01:57:57,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:57,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:57:57,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:57,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:57:57,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:57,483 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:57:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:57,609 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2022-11-03 01:57:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:57:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2022-11-03 01:57:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:57,610 INFO L225 Difference]: With dead ends: 140 [2022-11-03 01:57:57,610 INFO L226 Difference]: Without dead ends: 130 [2022-11-03 01:57:57,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:57:57,611 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 4 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:57,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 472 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 125 Unchecked, 0.0s Time] [2022-11-03 01:57:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-03 01:57:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 116. [2022-11-03 01:57:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 101 states have internal predecessors, (112), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:57:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2022-11-03 01:57:57,655 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 70 [2022-11-03 01:57:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:57,655 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2022-11-03 01:57:57,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-03 01:57:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2022-11-03 01:57:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 01:57:57,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:57,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:57,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:57,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:57,856 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2093027486, now seen corresponding path program 1 times [2022-11-03 01:57:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:57,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818810329] [2022-11-03 01:57:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:57,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:57,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:57,859 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:57,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 01:57:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:57,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:57:58,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:58,356 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:58,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818810329] [2022-11-03 01:57:58,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818810329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:58,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1705518322] [2022-11-03 01:57:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:58,357 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:57:58,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:57:58,358 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:57:58,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 01:57:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:58,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:57:58,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:57:58,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:57:58,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1705518322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:58,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670526206] [2022-11-03 01:57:58,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:58,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:58,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:58,554 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:58,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 01:57:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:58,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:57:58,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:57:58,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:57:58,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670526206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:58,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-11-03 01:57:58,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 8, 8] total 11 [2022-11-03 01:57:58,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584644857] [2022-11-03 01:57:58,737 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:58,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:57:58,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:58,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:57:58,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:57:58,738 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:57:58,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:58,858 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2022-11-03 01:57:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:58,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 69 [2022-11-03 01:57:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:58,859 INFO L225 Difference]: With dead ends: 128 [2022-11-03 01:57:58,859 INFO L226 Difference]: Without dead ends: 68 [2022-11-03 01:57:58,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 361 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:57:58,860 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 28 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:58,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 554 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-03 01:57:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-03 01:57:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-03 01:57:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 56 states have internal predecessors, (63), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:57:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-11-03 01:57:58,875 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 69 [2022-11-03 01:57:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:58,876 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-11-03 01:57:58,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:57:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-11-03 01:57:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 01:57:58,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:58,877 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2022-11-03 01:57:58,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:59,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-03 01:57:59,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 01:57:59,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:59,479 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:59,480 INFO L85 PathProgramCache]: Analyzing trace with hash 438339121, now seen corresponding path program 1 times [2022-11-03 01:57:59,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:59,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116325279] [2022-11-03 01:57:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:59,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:59,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:59,481 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:59,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 01:57:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:59,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:57:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 01:58:02,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:02,402 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:02,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116325279] [2022-11-03 01:58:02,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116325279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:02,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:02,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 01:58:02,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668594226] [2022-11-03 01:58:02,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:02,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:58:02,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:02,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:58:02,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2022-11-03 01:58:02,404 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:02,538 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2022-11-03 01:58:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:58:02,538 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2022-11-03 01:58:02,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:02,539 INFO L225 Difference]: With dead ends: 104 [2022-11-03 01:58:02,539 INFO L226 Difference]: Without dead ends: 96 [2022-11-03 01:58:02,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2022-11-03 01:58:02,540 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 21 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:02,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 525 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 151 Unchecked, 0.1s Time] [2022-11-03 01:58:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-03 01:58:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2022-11-03 01:58:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 69 states have internal predecessors, (77), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:58:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-11-03 01:58:02,570 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 73 [2022-11-03 01:58:02,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:02,571 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-11-03 01:58:02,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-11-03 01:58:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 01:58:02,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:02,573 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2022-11-03 01:58:02,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:02,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:02,786 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:02,786 INFO L85 PathProgramCache]: Analyzing trace with hash 696504559, now seen corresponding path program 1 times [2022-11-03 01:58:02,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:02,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079888926] [2022-11-03 01:58:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:02,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:02,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:02,787 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:02,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 01:58:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:02,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:58:02,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 01:58:04,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:04,196 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:04,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079888926] [2022-11-03 01:58:04,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079888926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:04,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:04,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-03 01:58:04,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240309952] [2022-11-03 01:58:04,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:04,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:58:04,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:04,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:58:04,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:58:04,198 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:04,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:04,348 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2022-11-03 01:58:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:58:04,349 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2022-11-03 01:58:04,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:04,350 INFO L225 Difference]: With dead ends: 108 [2022-11-03 01:58:04,350 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 01:58:04,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:58:04,351 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 20 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:04,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 626 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 286 Unchecked, 0.1s Time] [2022-11-03 01:58:04,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 01:58:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2022-11-03 01:58:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 62 states have internal predecessors, (69), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 01:58:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2022-11-03 01:58:04,369 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 73 [2022-11-03 01:58:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:04,369 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2022-11-03 01:58:04,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2022-11-03 01:58:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 01:58:04,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:04,370 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2022-11-03 01:58:04,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:04,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:04,582 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:04,583 INFO L85 PathProgramCache]: Analyzing trace with hash -405666381, now seen corresponding path program 1 times [2022-11-03 01:58:04,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:04,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639765062] [2022-11-03 01:58:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:04,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:04,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:04,584 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:04,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 01:58:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:04,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:58:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 01:58:06,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:06,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:06,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639765062] [2022-11-03 01:58:06,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639765062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:06,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:06,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-03 01:58:06,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810440124] [2022-11-03 01:58:06,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:06,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:58:06,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:06,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:58:06,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:58:06,275 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:10,639 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2022-11-03 01:58:10,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:58:10,640 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2022-11-03 01:58:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:10,641 INFO L225 Difference]: With dead ends: 107 [2022-11-03 01:58:10,641 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 01:58:10,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:58:10,642 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 75 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:10,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 444 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 259 Invalid, 0 Unknown, 40 Unchecked, 2.2s Time] [2022-11-03 01:58:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 01:58:10,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2022-11-03 01:58:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 56 states have internal predecessors, (62), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:58:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2022-11-03 01:58:10,657 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 73 [2022-11-03 01:58:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:10,658 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2022-11-03 01:58:10,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:10,658 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2022-11-03 01:58:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 01:58:10,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:10,659 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2022-11-03 01:58:10,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-03 01:58:10,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:10,870 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:10,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:10,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1028998347, now seen corresponding path program 1 times [2022-11-03 01:58:10,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:10,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049153637] [2022-11-03 01:58:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:10,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:10,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:10,872 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:10,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 01:58:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:10,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:58:10,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 01:58:11,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:11,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:11,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049153637] [2022-11-03 01:58:11,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049153637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:11,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:11,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 01:58:11,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515146074] [2022-11-03 01:58:11,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:11,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:58:11,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:11,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:58:11,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:58:11,752 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:12,660 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2022-11-03 01:58:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:58:12,661 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-11-03 01:58:12,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:12,662 INFO L225 Difference]: With dead ends: 96 [2022-11-03 01:58:12,662 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 01:58:12,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:58:12,663 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 35 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:12,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 587 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 162 Invalid, 0 Unknown, 124 Unchecked, 0.5s Time] [2022-11-03 01:58:12,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 01:58:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-11-03 01:58:12,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 70 states have internal predecessors, (76), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:58:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2022-11-03 01:58:12,685 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 74 [2022-11-03 01:58:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:12,686 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2022-11-03 01:58:12,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2022-11-03 01:58:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 01:58:12,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:12,687 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2022-11-03 01:58:12,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-03 01:58:12,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:12,899 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:12,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:12,900 INFO L85 PathProgramCache]: Analyzing trace with hash -770832909, now seen corresponding path program 1 times [2022-11-03 01:58:12,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:12,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114943650] [2022-11-03 01:58:12,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:12,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:12,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:12,901 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:12,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 01:58:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:12,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:58:12,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 01:58:14,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:14,274 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:14,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114943650] [2022-11-03 01:58:14,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114943650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:14,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:14,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-03 01:58:14,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013243402] [2022-11-03 01:58:14,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:14,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:58:14,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:14,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:58:14,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:58:14,276 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:14,432 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-11-03 01:58:14,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:58:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-11-03 01:58:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:14,433 INFO L225 Difference]: With dead ends: 96 [2022-11-03 01:58:14,433 INFO L226 Difference]: Without dead ends: 68 [2022-11-03 01:58:14,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:58:14,434 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 19 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:14,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 580 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 189 Unchecked, 0.1s Time] [2022-11-03 01:58:14,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-03 01:58:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-03 01:58:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 56 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:58:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-11-03 01:58:14,449 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 74 [2022-11-03 01:58:14,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:14,449 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-11-03 01:58:14,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-11-03 01:58:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 01:58:14,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:14,451 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2022-11-03 01:58:14,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:14,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:14,662 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:14,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:14,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1423365133, now seen corresponding path program 1 times [2022-11-03 01:58:14,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:14,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331925069] [2022-11-03 01:58:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:14,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:14,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:14,665 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:14,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 01:58:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:14,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:58:14,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 01:58:16,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:16,405 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:16,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331925069] [2022-11-03 01:58:16,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331925069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:16,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:16,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-03 01:58:16,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625426361] [2022-11-03 01:58:16,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:16,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:58:16,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:16,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:58:16,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:58:16,407 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:17,974 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-11-03 01:58:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:58:17,975 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-11-03 01:58:17,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:17,976 INFO L225 Difference]: With dead ends: 76 [2022-11-03 01:58:17,976 INFO L226 Difference]: Without dead ends: 68 [2022-11-03 01:58:17,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:58:17,977 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:17,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 488 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-11-03 01:58:17,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-03 01:58:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-03 01:58:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 56 states have internal predecessors, (60), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:58:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-11-03 01:58:17,989 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 74 [2022-11-03 01:58:17,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:17,989 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-11-03 01:58:17,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-11-03 01:58:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 01:58:17,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:17,990 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2022-11-03 01:58:18,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:18,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:18,202 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:18,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1165199695, now seen corresponding path program 1 times [2022-11-03 01:58:18,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:18,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684883979] [2022-11-03 01:58:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:18,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:18,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:18,206 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:18,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 01:58:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:18,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:58:18,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 01:58:18,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:18,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:18,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684883979] [2022-11-03 01:58:18,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684883979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:18,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:18,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:58:18,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110654472] [2022-11-03 01:58:18,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:18,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:58:18,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:18,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:58:18,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:58:18,587 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:18,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:18,768 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-11-03 01:58:18,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:58:18,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-11-03 01:58:18,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:18,769 INFO L225 Difference]: With dead ends: 68 [2022-11-03 01:58:18,769 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 01:58:18,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:58:18,770 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:18,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 280 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-03 01:58:18,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 01:58:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 01:58:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 01:58:18,771 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2022-11-03 01:58:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:18,771 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 01:58:18,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:58:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 01:58:18,772 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 01:58:18,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:58:18,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-03 01:58:18,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27556e29-2a86-475b-9760-e1d82399e4bf/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:18,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-03 01:59:51,298 WARN L234 SmtUtils]: Spent 1.54m on a formula simplification. DAG size of input: 274 DAG size of output: 258 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:00:15,747 WARN L234 SmtUtils]: Spent 24.44s on a formula simplification that was a NOOP. DAG size: 306 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:00:38,057 WARN L234 SmtUtils]: Spent 21.82s on a formula simplification that was a NOOP. DAG size: 296 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)