./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9 --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 0e14b8baad7c8f50637b16b3adcb891ef363d7563e7c4e0e74695e7b8e3d1787 --- 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-6b4ec56 [2022-11-20 18:55:41,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 18:55:41,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 18:55:41,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 18:55:41,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 18:55:41,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 18:55:41,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 18:55:41,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 18:55:41,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 18:55:41,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 18:55:41,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 18:55:41,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 18:55:41,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 18:55:41,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 18:55:41,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 18:55:41,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 18:55:41,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 18:55:41,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 18:55:41,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 18:55:41,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 18:55:41,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 18:55:41,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 18:55:41,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 18:55:41,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 18:55:41,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 18:55:41,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 18:55:41,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 18:55:41,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 18:55:41,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 18:55:41,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 18:55:41,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 18:55:41,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 18:55:41,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 18:55:41,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 18:55:41,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 18:55:41,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 18:55:41,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 18:55:41,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 18:55:41,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 18:55:41,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 18:55:41,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 18:55:41,214 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 18:55:41,241 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 18:55:41,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 18:55:41,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 18:55:41,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 18:55:41,242 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 18:55:41,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 18:55:41,243 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 18:55:41,243 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 18:55:41,243 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 18:55:41,243 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 18:55:41,244 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 18:55:41,244 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 18:55:41,244 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 18:55:41,244 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 18:55:41,245 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 18:55:41,245 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 18:55:41,245 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 18:55:41,245 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 18:55:41,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 18:55:41,246 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 18:55:41,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 18:55:41,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 18:55:41,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 18:55:41,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 18:55:41,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 18:55:41,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 18:55:41,248 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 18:55:41,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 18:55:41,249 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 18:55:41,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 18:55:41,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 18:55:41,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 18:55:41,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:55:41,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 18:55:41,250 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 18:55:41,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 18:55:41,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 18:55:41,251 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 18:55:41,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 18:55:41,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 18:55:41,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 18:55:41,252 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_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e14b8baad7c8f50637b16b3adcb891ef363d7563e7c4e0e74695e7b8e3d1787 [2022-11-20 18:55:41,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 18:55:41,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 18:55:41,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 18:55:41,712 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 18:55:41,712 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 18:55:41,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i [2022-11-20 18:55:45,581 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 18:55:45,941 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 18:55:45,941 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i [2022-11-20 18:55:45,962 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/data/ebaa71d2f/ec351872622d427bbf7a6d35e2b92c56/FLAGc364d02e5 [2022-11-20 18:55:45,986 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/data/ebaa71d2f/ec351872622d427bbf7a6d35e2b92c56 [2022-11-20 18:55:45,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 18:55:45,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 18:55:45,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 18:55:45,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 18:55:46,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 18:55:46,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:55:45" (1/1) ... [2022-11-20 18:55:46,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eddb056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46, skipping insertion in model container [2022-11-20 18:55:46,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:55:45" (1/1) ... [2022-11-20 18:55:46,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 18:55:46,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 18:55:46,401 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i[22634,22647] [2022-11-20 18:55:46,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:55:46,489 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 18:55:46,550 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i[22634,22647] [2022-11-20 18:55:46,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:55:46,619 INFO L208 MainTranslator]: Completed translation [2022-11-20 18:55:46,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46 WrapperNode [2022-11-20 18:55:46,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 18:55:46,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 18:55:46,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 18:55:46,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 18:55:46,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46" (1/1) ... [2022-11-20 18:55:46,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46" (1/1) ... [2022-11-20 18:55:46,706 INFO L138 Inliner]: procedures = 140, calls = 94, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 228 [2022-11-20 18:55:46,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 18:55:46,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 18:55:46,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 18:55:46,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 18:55:46,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46" (1/1) ... [2022-11-20 18:55:46,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46" (1/1) ... [2022-11-20 18:55:46,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46" (1/1) ... [2022-11-20 18:55:46,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46" (1/1) ... [2022-11-20 18:55:46,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46" (1/1) ... [2022-11-20 18:55:46,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46" (1/1) ... [2022-11-20 18:55:46,806 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46" (1/1) ... [2022-11-20 18:55:46,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46" (1/1) ... [2022-11-20 18:55:46,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 18:55:46,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 18:55:46,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 18:55:46,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 18:55:46,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46" (1/1) ... [2022-11-20 18:55:46,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:55:46,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:55:46,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 18:55:46,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 18:55:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-20 18:55:46,927 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-20 18:55:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2022-11-20 18:55:46,928 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2022-11-20 18:55:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 18:55:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 18:55:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2022-11-20 18:55:46,928 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2022-11-20 18:55:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 18:55:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 18:55:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-20 18:55:46,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-20 18:55:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 18:55:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 18:55:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 18:55:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2022-11-20 18:55:46,930 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2022-11-20 18:55:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2022-11-20 18:55:46,930 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2022-11-20 18:55:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 18:55:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 18:55:46,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 18:55:47,152 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 18:55:47,158 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 18:55:47,943 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 18:55:48,132 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 18:55:48,135 INFO L300 CfgBuilder]: Removed 38 assume(true) statements. [2022-11-20 18:55:48,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:55:48 BoogieIcfgContainer [2022-11-20 18:55:48,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 18:55:48,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 18:55:48,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 18:55:48,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 18:55:48,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:55:45" (1/3) ... [2022-11-20 18:55:48,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd1c9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:55:48, skipping insertion in model container [2022-11-20 18:55:48,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:46" (2/3) ... [2022-11-20 18:55:48,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd1c9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:55:48, skipping insertion in model container [2022-11-20 18:55:48,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:55:48" (3/3) ... [2022-11-20 18:55:48,148 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2022-11-20 18:55:48,171 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 18:55:48,171 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 18:55:48,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 18:55:48,242 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;@327abb1d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 18:55:48,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 18:55:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 69 states have (on average 1.7971014492753623) internal successors, (124), 89 states have internal predecessors, (124), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-20 18:55:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 18:55:48,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:55:48,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:55:48,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:55:48,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:55:48,267 INFO L85 PathProgramCache]: Analyzing trace with hash -121495237, now seen corresponding path program 1 times [2022-11-20 18:55:48,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:55:48,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60939785] [2022-11-20 18:55:48,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:48,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:55:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 18:55:48,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:55:48,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60939785] [2022-11-20 18:55:48,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60939785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:55:48,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:55:48,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 18:55:48,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612610272] [2022-11-20 18:55:48,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:55:48,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 18:55:48,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:55:48,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 18:55:48,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 18:55:48,891 INFO L87 Difference]: Start difference. First operand has 101 states, 69 states have (on average 1.7971014492753623) internal successors, (124), 89 states have internal predecessors, (124), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 18:55:49,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:55:49,105 INFO L93 Difference]: Finished difference Result 199 states and 351 transitions. [2022-11-20 18:55:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 18:55:49,108 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-11-20 18:55:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:55:49,120 INFO L225 Difference]: With dead ends: 199 [2022-11-20 18:55:49,120 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 18:55:49,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 18:55:49,129 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:55:49,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 18:55:49,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 18:55:49,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-11-20 18:55:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 68 states have (on average 1.338235294117647) internal successors, (91), 86 states have internal predecessors, (91), 24 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 18:55:49,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 125 transitions. [2022-11-20 18:55:49,215 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 125 transitions. Word has length 22 [2022-11-20 18:55:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:55:49,217 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 125 transitions. [2022-11-20 18:55:49,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 18:55:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 125 transitions. [2022-11-20 18:55:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 18:55:49,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:55:49,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:55:49,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 18:55:49,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:55:49,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:55:49,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2109903819, now seen corresponding path program 1 times [2022-11-20 18:55:49,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:55:49,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415326985] [2022-11-20 18:55:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:49,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:55:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:55:50,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:55:50,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415326985] [2022-11-20 18:55:50,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415326985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:55:50,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:55:50,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 18:55:50,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995389171] [2022-11-20 18:55:50,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:55:50,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 18:55:50,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:55:50,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 18:55:50,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 18:55:50,442 INFO L87 Difference]: Start difference. First operand 98 states and 125 transitions. Second operand has 10 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 18:55:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:55:51,366 INFO L93 Difference]: Finished difference Result 212 states and 277 transitions. [2022-11-20 18:55:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 18:55:51,368 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-11-20 18:55:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:55:51,382 INFO L225 Difference]: With dead ends: 212 [2022-11-20 18:55:51,382 INFO L226 Difference]: Without dead ends: 165 [2022-11-20 18:55:51,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-20 18:55:51,386 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 71 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 18:55:51,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 846 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 18:55:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-20 18:55:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 129. [2022-11-20 18:55:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 112 states have internal predecessors, (125), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2022-11-20 18:55:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 166 transitions. [2022-11-20 18:55:51,410 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 166 transitions. Word has length 23 [2022-11-20 18:55:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:55:51,411 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 166 transitions. [2022-11-20 18:55:51,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 18:55:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 166 transitions. [2022-11-20 18:55:51,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 18:55:51,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:55:51,413 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:55:51,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 18:55:51,414 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:55:51,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:55:51,415 INFO L85 PathProgramCache]: Analyzing trace with hash -958696857, now seen corresponding path program 1 times [2022-11-20 18:55:51,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:55:51,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156448079] [2022-11-20 18:55:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:51,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:55:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:55:51,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:55:51,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156448079] [2022-11-20 18:55:51,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156448079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:55:51,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905232657] [2022-11-20 18:55:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:51,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:55:51,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:55:51,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:55:51,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 18:55:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 18:55:52,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:55:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:55:52,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:55:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:55:52,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905232657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:55:52,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867506768] [2022-11-20 18:55:52,939 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-20 18:55:52,940 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:55:52,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:55:52,951 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:55:52,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:55:53,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 18:55:53,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 18:55:53,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 18:55:53,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:55,332 INFO L321 Elim1Store]: treesize reduction 237, result has 25.7 percent of original size [2022-11-20 18:55:55,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 355 treesize of output 373 [2022-11-20 18:55:55,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:56,780 INFO L321 Elim1Store]: treesize reduction 235, result has 26.3 percent of original size [2022-11-20 18:55:56,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 243 treesize of output 263 [2022-11-20 18:55:56,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:55:56,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:56,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 9 [2022-11-20 18:55:57,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 18:55:57,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 18:55:57,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:55:58,150 INFO L321 Elim1Store]: treesize reduction 202, result has 34.6 percent of original size [2022-11-20 18:55:58,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 6489 treesize of output 4435 [2022-11-20 18:56:00,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 367 treesize of output 362 [2022-11-20 18:56:00,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:56:00,916 INFO L321 Elim1Store]: treesize reduction 52, result has 36.6 percent of original size [2022-11-20 18:56:00,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 285 treesize of output 313 [2022-11-20 18:56:01,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:01,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:01,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:01,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 96 [2022-11-20 18:56:01,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:01,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-20 18:56:01,455 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: no need to replace index at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.constructReplacementForSelectCase(DerPreprocessor.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.constructDerEnabler(DerPreprocessor.java:187) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:122) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:85) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:71) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:85) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:71) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 18:56:01,462 INFO L158 Benchmark]: Toolchain (without parser) took 15466.07ms. Allocated memory was 148.9MB in the beginning and 218.1MB in the end (delta: 69.2MB). Free memory was 115.9MB in the beginning and 73.1MB in the end (delta: 42.8MB). Peak memory consumption was 131.2MB. Max. memory is 16.1GB. [2022-11-20 18:56:01,462 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 115.3MB. Free memory is still 88.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 18:56:01,463 INFO L158 Benchmark]: CACSL2BoogieTranslator took 623.00ms. Allocated memory is still 148.9MB. Free memory was 115.9MB in the beginning and 96.8MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-20 18:56:01,464 INFO L158 Benchmark]: Boogie Procedure Inliner took 91.20ms. Allocated memory is still 148.9MB. Free memory was 96.8MB in the beginning and 94.1MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-20 18:56:01,464 INFO L158 Benchmark]: Boogie Preprocessor took 107.66ms. Allocated memory is still 148.9MB. Free memory was 94.1MB in the beginning and 91.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 18:56:01,465 INFO L158 Benchmark]: RCFGBuilder took 1317.21ms. Allocated memory is still 148.9MB. Free memory was 91.5MB in the beginning and 84.6MB in the end (delta: 6.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-20 18:56:01,466 INFO L158 Benchmark]: TraceAbstraction took 13320.16ms. Allocated memory was 148.9MB in the beginning and 218.1MB in the end (delta: 69.2MB). Free memory was 83.7MB in the beginning and 73.1MB in the end (delta: 10.6MB). Peak memory consumption was 100.2MB. Max. memory is 16.1GB. [2022-11-20 18:56:01,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 115.3MB. Free memory is still 88.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 623.00ms. Allocated memory is still 148.9MB. Free memory was 115.9MB in the beginning and 96.8MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 91.20ms. Allocated memory is still 148.9MB. Free memory was 96.8MB in the beginning and 94.1MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 107.66ms. Allocated memory is still 148.9MB. Free memory was 94.1MB in the beginning and 91.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1317.21ms. Allocated memory is still 148.9MB. Free memory was 91.5MB in the beginning and 84.6MB in the end (delta: 6.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 13320.16ms. Allocated memory was 148.9MB in the beginning and 218.1MB in the end (delta: 69.2MB). Free memory was 83.7MB in the beginning and 73.1MB in the end (delta: 10.6MB). Peak memory consumption was 100.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: no need to replace index de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: no need to replace index: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.constructReplacementForSelectCase(DerPreprocessor.java:333) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-20 18:56:01,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9 --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 0e14b8baad7c8f50637b16b3adcb891ef363d7563e7c4e0e74695e7b8e3d1787 --- 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-6b4ec56 [2022-11-20 18:56:04,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 18:56:04,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 18:56:04,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 18:56:04,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 18:56:04,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 18:56:04,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 18:56:04,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 18:56:04,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 18:56:04,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 18:56:04,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 18:56:04,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 18:56:04,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 18:56:04,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 18:56:04,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 18:56:04,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 18:56:04,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 18:56:04,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 18:56:04,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 18:56:04,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 18:56:04,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 18:56:04,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 18:56:04,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 18:56:04,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 18:56:04,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 18:56:04,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 18:56:04,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 18:56:04,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 18:56:04,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 18:56:04,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 18:56:04,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 18:56:04,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 18:56:04,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 18:56:04,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 18:56:04,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 18:56:04,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 18:56:04,664 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 18:56:04,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 18:56:04,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 18:56:04,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 18:56:04,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 18:56:04,673 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-20 18:56:04,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 18:56:04,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 18:56:04,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 18:56:04,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 18:56:04,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 18:56:04,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 18:56:04,711 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 18:56:04,712 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 18:56:04,712 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 18:56:04,712 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 18:56:04,713 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 18:56:04,713 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 18:56:04,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 18:56:04,714 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 18:56:04,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 18:56:04,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 18:56:04,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 18:56:04,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 18:56:04,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 18:56:04,716 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 18:56:04,716 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 18:56:04,716 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 18:56:04,716 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 18:56:04,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 18:56:04,717 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 18:56:04,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 18:56:04,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 18:56:04,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 18:56:04,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 18:56:04,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:56:04,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 18:56:04,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 18:56:04,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 18:56:04,720 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 18:56:04,720 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 18:56:04,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 18:56:04,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 18:56:04,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 18:56:04,721 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_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e14b8baad7c8f50637b16b3adcb891ef363d7563e7c4e0e74695e7b8e3d1787 [2022-11-20 18:56:05,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 18:56:05,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 18:56:05,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 18:56:05,188 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 18:56:05,189 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 18:56:05,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i [2022-11-20 18:56:09,335 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 18:56:09,629 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 18:56:09,630 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i [2022-11-20 18:56:09,646 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/data/6112db2e9/577087c5f170423ead3dd13d668368ca/FLAGb2e25de51 [2022-11-20 18:56:09,665 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/data/6112db2e9/577087c5f170423ead3dd13d668368ca [2022-11-20 18:56:09,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 18:56:09,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 18:56:09,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 18:56:09,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 18:56:09,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 18:56:09,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:56:09" (1/1) ... [2022-11-20 18:56:09,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be20264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:09, skipping insertion in model container [2022-11-20 18:56:09,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:56:09" (1/1) ... [2022-11-20 18:56:09,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 18:56:09,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 18:56:10,080 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i[22634,22647] [2022-11-20 18:56:10,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:56:10,221 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 18:56:10,254 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/sv-benchmarks/c/heap-manipulation/dll_of_dll-1.i[22634,22647] [2022-11-20 18:56:10,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:56:10,323 INFO L208 MainTranslator]: Completed translation [2022-11-20 18:56:10,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10 WrapperNode [2022-11-20 18:56:10,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 18:56:10,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 18:56:10,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 18:56:10,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 18:56:10,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10" (1/1) ... [2022-11-20 18:56:10,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10" (1/1) ... [2022-11-20 18:56:10,445 INFO L138 Inliner]: procedures = 141, calls = 94, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 229 [2022-11-20 18:56:10,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 18:56:10,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 18:56:10,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 18:56:10,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 18:56:10,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10" (1/1) ... [2022-11-20 18:56:10,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10" (1/1) ... [2022-11-20 18:56:10,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10" (1/1) ... [2022-11-20 18:56:10,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10" (1/1) ... [2022-11-20 18:56:10,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10" (1/1) ... [2022-11-20 18:56:10,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10" (1/1) ... [2022-11-20 18:56:10,536 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10" (1/1) ... [2022-11-20 18:56:10,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10" (1/1) ... [2022-11-20 18:56:10,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 18:56:10,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 18:56:10,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 18:56:10,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 18:56:10,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10" (1/1) ... [2022-11-20 18:56:10,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:56:10,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:10,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 18:56:10,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 18:56:10,657 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-20 18:56:10,658 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-20 18:56:10,658 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2022-11-20 18:56:10,658 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2022-11-20 18:56:10,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 18:56:10,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 18:56:10,659 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2022-11-20 18:56:10,659 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2022-11-20 18:56:10,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 18:56:10,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 18:56:10,659 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-20 18:56:10,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-20 18:56:10,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 18:56:10,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 18:56:10,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 18:56:10,660 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2022-11-20 18:56:10,661 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2022-11-20 18:56:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 18:56:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2022-11-20 18:56:10,661 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2022-11-20 18:56:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 18:56:10,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 18:56:10,866 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 18:56:10,868 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 18:56:11,781 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 18:56:11,790 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 18:56:11,790 INFO L300 CfgBuilder]: Removed 38 assume(true) statements. [2022-11-20 18:56:11,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:56:11 BoogieIcfgContainer [2022-11-20 18:56:11,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 18:56:11,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 18:56:11,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 18:56:11,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 18:56:11,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:56:09" (1/3) ... [2022-11-20 18:56:11,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390b00c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:56:11, skipping insertion in model container [2022-11-20 18:56:11,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:56:10" (2/3) ... [2022-11-20 18:56:11,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390b00c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:56:11, skipping insertion in model container [2022-11-20 18:56:11,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:56:11" (3/3) ... [2022-11-20 18:56:11,806 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2022-11-20 18:56:11,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 18:56:11,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 18:56:11,903 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 18:56:11,911 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;@442dd7db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 18:56:11,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 18:56:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 95 states have (on average 1.7157894736842105) internal successors, (163), 115 states have internal predecessors, (163), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-20 18:56:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 18:56:11,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:11,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:11,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1604000671, now seen corresponding path program 1 times [2022-11-20 18:56:11,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:56:11,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235794544] [2022-11-20 18:56:11,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:11,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:56:11,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:56:11,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:56:11,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 18:56:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:12,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 18:56:12,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 18:56:12,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:56:12,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:56:12,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235794544] [2022-11-20 18:56:12,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235794544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:56:12,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:56:12,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 18:56:12,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711552154] [2022-11-20 18:56:12,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:56:12,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 18:56:12,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:56:12,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 18:56:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 18:56:12,467 INFO L87 Difference]: Start difference. First operand has 127 states, 95 states have (on average 1.7157894736842105) internal successors, (163), 115 states have internal predecessors, (163), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 18:56:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:12,530 INFO L93 Difference]: Finished difference Result 249 states and 427 transitions. [2022-11-20 18:56:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 18:56:12,533 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-11-20 18:56:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:12,546 INFO L225 Difference]: With dead ends: 249 [2022-11-20 18:56:12,546 INFO L226 Difference]: Without dead ends: 119 [2022-11-20 18:56:12,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 18:56:12,557 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:12,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 18:56:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-20 18:56:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-11-20 18:56:12,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 107 states have internal predecessors, (114), 24 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 18:56:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2022-11-20 18:56:12,626 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 37 [2022-11-20 18:56:12,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:12,629 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2022-11-20 18:56:12,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 18:56:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2022-11-20 18:56:12,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 18:56:12,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:12,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:12,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:12,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:56:12,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:12,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1419477340, now seen corresponding path program 1 times [2022-11-20 18:56:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:56:12,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305370943] [2022-11-20 18:56:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:12,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:56:12,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:56:12,842 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:56:12,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 18:56:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:13,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 18:56:13,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:56:13,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:56:13,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:56:13,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305370943] [2022-11-20 18:56:13,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305370943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:56:13,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1673003761] [2022-11-20 18:56:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:13,734 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 18:56:13,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 18:56:13,748 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 18:56:13,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-20 18:56:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:14,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 18:56:14,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:14,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 18:56:14,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-20 18:56:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:56:14,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:56:14,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1673003761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:56:14,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 18:56:14,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [5, 5] total 19 [2022-11-20 18:56:14,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630012721] [2022-11-20 18:56:14,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:56:14,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 18:56:14,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:56:14,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 18:56:14,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2022-11-20 18:56:14,893 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 18:56:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:16,799 INFO L93 Difference]: Finished difference Result 294 states and 377 transitions. [2022-11-20 18:56:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 18:56:16,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-11-20 18:56:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:16,809 INFO L225 Difference]: With dead ends: 294 [2022-11-20 18:56:16,809 INFO L226 Difference]: Without dead ends: 241 [2022-11-20 18:56:16,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-11-20 18:56:16,820 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 187 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:16,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1688 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 18:56:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-20 18:56:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 152. [2022-11-20 18:56:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 118 states have (on average 1.271186440677966) internal successors, (150), 135 states have internal predecessors, (150), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2022-11-20 18:56:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 191 transitions. [2022-11-20 18:56:16,881 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 191 transitions. Word has length 37 [2022-11-20 18:56:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:16,882 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 191 transitions. [2022-11-20 18:56:16,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 18:56:16,883 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 191 transitions. [2022-11-20 18:56:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 18:56:16,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:16,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:16,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:17,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:17,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:56:17,286 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:17,287 INFO L85 PathProgramCache]: Analyzing trace with hash -855553195, now seen corresponding path program 1 times [2022-11-20 18:56:17,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:56:17,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764361847] [2022-11-20 18:56:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:17,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:56:17,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:56:17,290 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:56:17,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 18:56:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 18:56:17,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:56:17,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:56:18,020 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:56:18,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764361847] [2022-11-20 18:56:18,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764361847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:56:18,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1390767137] [2022-11-20 18:56:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:18,022 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 18:56:18,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 18:56:18,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 18:56:18,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-20 18:56:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:18,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 18:56:18,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:56:18,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:56:18,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1390767137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:56:18,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362993943] [2022-11-20 18:56:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:18,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:18,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:18,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:56:18,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 18:56:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 18:56:19,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:56:19,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:56:19,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362993943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:56:19,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 18:56:19,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 6 [2022-11-20 18:56:19,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378945311] [2022-11-20 18:56:19,410 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 18:56:19,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 18:56:19,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:56:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 18:56:19,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 18:56:19,414 INFO L87 Difference]: Start difference. First operand 152 states and 191 transitions. Second operand has 6 states, 4 states have (on average 8.0) internal successors, (32), 6 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 18:56:19,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:19,619 INFO L93 Difference]: Finished difference Result 280 states and 365 transitions. [2022-11-20 18:56:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 18:56:19,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 8.0) internal successors, (32), 6 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2022-11-20 18:56:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:19,624 INFO L225 Difference]: With dead ends: 280 [2022-11-20 18:56:19,624 INFO L226 Difference]: Without dead ends: 131 [2022-11-20 18:56:19,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 18:56:19,627 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 19 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:19,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 548 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 18:56:19,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-20 18:56:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-20 18:56:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 114 states have internal predecessors, (122), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-20 18:56:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 162 transitions. [2022-11-20 18:56:19,648 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 162 transitions. Word has length 40 [2022-11-20 18:56:19,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:19,649 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 162 transitions. [2022-11-20 18:56:19,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 8.0) internal successors, (32), 6 states have internal predecessors, (32), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 18:56:19,649 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 162 transitions. [2022-11-20 18:56:19,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-20 18:56:19,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:19,653 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:19,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:19,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-11-20 18:56:20,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:20,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:56:20,265 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:20,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:20,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1380488684, now seen corresponding path program 1 times [2022-11-20 18:56:20,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:56:20,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360309130] [2022-11-20 18:56:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:20,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:56:20,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:56:20,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:56:20,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 18:56:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:20,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 18:56:20,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:21,138 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:56:21,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:56:21,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:56:21,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 18:56:21,277 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-20 18:56:21,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 26 [2022-11-20 18:56:21,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-11-20 18:56:21,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:56:21,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2022-11-20 18:56:21,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 18:56:21,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-20 18:56:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 18:56:22,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:23,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:56:23,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 107 [2022-11-20 18:56:23,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2022-11-20 18:56:23,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 114 [2022-11-20 18:56:23,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 18:56:23,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-20 18:56:23,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:56:23,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 215 [2022-11-20 18:56:23,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 242 [2022-11-20 18:56:23,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 238 [2022-11-20 18:56:23,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 18:56:23,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-20 18:56:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 18:56:23,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:56:23,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360309130] [2022-11-20 18:56:23,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360309130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:56:23,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2118329103] [2022-11-20 18:56:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:23,750 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 18:56:23,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 18:56:23,751 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 18:56:23,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-20 18:56:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:24,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 18:56:24,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:24,926 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:56:24,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:56:24,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:56:24,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 18:56:25,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:56:25,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:56:25,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 9 [2022-11-20 18:56:25,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 18:56:25,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-20 18:56:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 5 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-20 18:56:25,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:26,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:56:26,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 107 [2022-11-20 18:56:26,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2022-11-20 18:56:26,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 114 [2022-11-20 18:56:26,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 18:56:26,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-20 18:56:26,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:56:26,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 107 [2022-11-20 18:56:26,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2022-11-20 18:56:26,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 114 [2022-11-20 18:56:26,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 18:56:26,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-20 18:56:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 18:56:26,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2118329103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:56:26,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365190743] [2022-11-20 18:56:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:26,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:26,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:26,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:56:26,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 18:56:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:27,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 18:56:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:27,413 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:56:27,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:56:27,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:56:27,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 18:56:27,521 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-20 18:56:27,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 34 [2022-11-20 18:56:27,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-20 18:56:27,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-20 18:56:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 18:56:27,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:28,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:56:28,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 107 [2022-11-20 18:56:28,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2022-11-20 18:56:28,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 114 [2022-11-20 18:56:28,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 18:56:28,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-20 18:56:28,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:56:28,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 215 [2022-11-20 18:56:28,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 242 [2022-11-20 18:56:28,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 238 [2022-11-20 18:56:28,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 18:56:28,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-20 18:56:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 18:56:29,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365190743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:56:29,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 18:56:29,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16, 15, 15, 15] total 20 [2022-11-20 18:56:29,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244624177] [2022-11-20 18:56:29,154 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 18:56:29,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 18:56:29,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:56:29,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 18:56:29,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=334, Unknown=4, NotChecked=0, Total=380 [2022-11-20 18:56:29,158 INFO L87 Difference]: Start difference. First operand 131 states and 162 transitions. Second operand has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 6 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (13), 9 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-20 18:56:31,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:31,280 INFO L93 Difference]: Finished difference Result 298 states and 375 transitions. [2022-11-20 18:56:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 18:56:31,281 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 6 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (13), 9 states have call predecessors, (13), 4 states have call successors, (13) Word has length 107 [2022-11-20 18:56:31,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:31,284 INFO L225 Difference]: With dead ends: 298 [2022-11-20 18:56:31,284 INFO L226 Difference]: Without dead ends: 245 [2022-11-20 18:56:31,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 618 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=570, Unknown=5, NotChecked=0, Total=650 [2022-11-20 18:56:31,287 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 177 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:31,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 2140 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 436 Invalid, 0 Unknown, 128 Unchecked, 1.7s Time] [2022-11-20 18:56:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-20 18:56:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 162. [2022-11-20 18:56:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 124 states have (on average 1.2661290322580645) internal successors, (157), 141 states have internal predecessors, (157), 28 states have call successors, (28), 9 states have call predecessors, (28), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-11-20 18:56:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 200 transitions. [2022-11-20 18:56:31,311 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 200 transitions. Word has length 107 [2022-11-20 18:56:31,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:31,312 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 200 transitions. [2022-11-20 18:56:31,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 6 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (13), 9 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-20 18:56:31,313 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 200 transitions. [2022-11-20 18:56:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 18:56:31,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:31,317 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:31,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:31,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:31,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:31,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:31,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:31,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2083518563, now seen corresponding path program 1 times [2022-11-20 18:56:31,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:56:31,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734484529] [2022-11-20 18:56:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:31,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:56:31,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:56:31,936 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:56:31,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 18:56:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:32,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 18:56:32,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:32,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 18:56:33,151 WARN L859 $PredicateComparison]: unable to prove that (exists ((|##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| (_ BitVec 32)) (v_ArrVal_1340 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1341 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= |c_##fun~$Pointer$~TO~VOID_dll_insert_slave_~next~0#1.base| (select (select (store |c_old(#memory_$Pointer$.base)| |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| v_ArrVal_1341) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|)) (= (_ bv0 1) (select |c_old(#valid)| |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base|)) (= |c_##fun~$Pointer$~TO~VOID_dll_insert_slave_~next~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.offset)| |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| v_ArrVal_1340) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|)))) is different from true [2022-11-20 18:56:33,425 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-20 18:56:33,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2022-11-20 18:56:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 18:56:33,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:56:33,429 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:56:33,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734484529] [2022-11-20 18:56:33,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734484529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:56:33,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:56:33,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 18:56:33,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57445374] [2022-11-20 18:56:33,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:56:33,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 18:56:33,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:56:33,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 18:56:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=4, NotChecked=14, Total=90 [2022-11-20 18:56:33,433 INFO L87 Difference]: Start difference. First operand 162 states and 200 transitions. Second operand has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 18:56:34,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:34,733 INFO L93 Difference]: Finished difference Result 323 states and 406 transitions. [2022-11-20 18:56:34,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 18:56:34,734 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 4 states have call successors, (12) Word has length 110 [2022-11-20 18:56:34,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:34,741 INFO L225 Difference]: With dead ends: 323 [2022-11-20 18:56:34,741 INFO L226 Difference]: Without dead ends: 166 [2022-11-20 18:56:34,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=4, NotChecked=14, Total=90 [2022-11-20 18:56:34,746 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 44 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:34,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 443 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 336 Invalid, 0 Unknown, 311 Unchecked, 1.3s Time] [2022-11-20 18:56:34,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-20 18:56:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-11-20 18:56:34,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 127 states have (on average 1.2598425196850394) internal successors, (160), 145 states have internal predecessors, (160), 28 states have call successors, (28), 9 states have call predecessors, (28), 10 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2022-11-20 18:56:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2022-11-20 18:56:34,793 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 110 [2022-11-20 18:56:34,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:34,796 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2022-11-20 18:56:34,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 18:56:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2022-11-20 18:56:34,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 18:56:34,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:34,805 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:34,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:35,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:56:35,006 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:35,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:35,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1464901529, now seen corresponding path program 1 times [2022-11-20 18:56:35,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:56:35,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603188866] [2022-11-20 18:56:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:35,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:56:35,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:56:35,009 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:56:35,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 18:56:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:35,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 18:56:35,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:36,035 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:56:36,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:56:36,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:56:36,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 18:56:36,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:56:36,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:56:36,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 9 [2022-11-20 18:56:36,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 18:56:36,979 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:56:36,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:56:37,172 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:56:37,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:56:37,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:56:37,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:56:37,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 18:56:37,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:56:37,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 15 [2022-11-20 18:56:37,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 18:56:37,531 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-20 18:56:37,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 32 [2022-11-20 18:56:37,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-11-20 18:56:37,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 18:56:37,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 84 [2022-11-20 18:56:37,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2022-11-20 18:56:38,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 18:56:38,823 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 18:56:38,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2022-11-20 18:56:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 29 proven. 25 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-20 18:56:38,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:44,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-20 18:56:44,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2022-11-20 18:56:44,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2022-11-20 18:56:44,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2022-11-20 18:56:44,482 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_dll_insert_master_alloc_or_die_master_#res#1.base_116| (_ BitVec 32)) (v_ArrVal_1647 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= |v_dll_insert_master_alloc_or_die_master_#res#1.base_116| |c_dll_create_generic_~#dll~0.base|) (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| |v_dll_insert_master_alloc_or_die_master_#res#1.base_116| v_ArrVal_1647) |c_dll_create_generic_~#dll~0.base|) |c_dll_create_generic_~#dll~0.offset|))))) (forall ((v_ArrVal_1647 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_#memory_$Pointer$.base| (_ bv0 32) v_ArrVal_1647) |c_dll_create_generic_~#dll~0.base|) |c_dll_create_generic_~#dll~0.offset|) (_ bv0 32)))) (or (= |c_dll_create_generic_~#dll~0.offset| (_ bv0 32)) (forall ((|v_dll_insert_master_alloc_or_die_master_#res#1.base_116| (_ BitVec 32)) (v_ArrVal_1647 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| |v_dll_insert_master_alloc_or_die_master_#res#1.base_116| v_ArrVal_1647) |c_dll_create_generic_~#dll~0.base|) |c_dll_create_generic_~#dll~0.offset|)))))) is different from false [2022-11-20 18:56:44,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:56:44,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603188866] [2022-11-20 18:56:44,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603188866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:56:44,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [869714489] [2022-11-20 18:56:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:44,487 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 18:56:44,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 18:56:44,488 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 18:56:44,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-20 18:56:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:46,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 18:56:46,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:47,333 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:56:47,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:56:47,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:56:47,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 18:56:47,433 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-20 18:56:47,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 26 [2022-11-20 18:56:47,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-11-20 18:56:47,468 WARN L859 $PredicateComparison]: unable to prove that (and (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|))) (let ((.cse0 (not (= .cse1 (_ bv0 32))))) (or (and .cse0 (= |c_dll_insert_master_#in~dll#1.base| .cse1)) (and (exists ((v_DerPreprocessor_16 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_15 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= .cse1 (select v_DerPreprocessor_16 |c_dll_insert_master_#in~dll#1.offset|)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_15) |c_dll_insert_master_#in~dll#1.base| v_DerPreprocessor_16) .cse1 v_DerPreprocessor_15) |c_dll_insert_master_#in~dll#1.base| v_DerPreprocessor_16) .cse1) (select |c_#memory_$Pointer$.base| .cse1)))) .cse0)))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32)))) is different from true [2022-11-20 18:56:47,549 WARN L859 $PredicateComparison]: unable to prove that (and (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|))) (let ((.cse1 (not (= .cse0 (_ bv0 32))))) (or (and (exists ((v_DerPreprocessor_16 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_15 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_15) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base| v_DerPreprocessor_16) .cse0 v_DerPreprocessor_15) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base| v_DerPreprocessor_16) .cse0)) (= .cse0 (select v_DerPreprocessor_16 |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|)))) .cse1) (and .cse1 (= .cse0 |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|))))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32)))) is different from true [2022-11-20 18:56:47,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:56:47,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 54 [2022-11-20 18:56:47,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 18:56:49,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-20 18:56:49,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-20 18:56:49,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:56:49,927 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 18:56:49,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 51 [2022-11-20 18:56:49,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-11-20 18:56:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 12 not checked. [2022-11-20 18:56:49,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:51,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [869714489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:56:51,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078515058] [2022-11-20 18:56:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:51,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:51,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:51,148 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:56:51,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 18:56:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:51,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 18:56:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:51,874 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:56:51,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:56:51,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:56:51,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 18:56:51,977 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-20 18:56:51,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 34 [2022-11-20 18:56:51,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-20 18:56:53,246 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:56:53,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:56:53,367 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:56:53,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:56:53,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:56:53,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 18:56:53,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:56:53,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:56:53,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 15 [2022-11-20 18:56:53,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 18:56:53,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 19 [2022-11-20 18:56:53,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 18:56:54,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 157 [2022-11-20 18:56:54,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 150 [2022-11-20 18:56:54,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 148 [2022-11-20 18:56:54,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 18:56:55,121 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 18:56:55,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2022-11-20 18:56:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 39 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-20 18:56:55,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:59,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-20 18:56:59,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2022-11-20 18:56:59,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2022-11-20 18:56:59,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2022-11-20 18:57:00,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078515058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:57:00,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:57:00,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 26] total 51 [2022-11-20 18:57:00,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457050367] [2022-11-20 18:57:00,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:57:00,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 18:57:00,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:57:00,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 18:57:00,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3098, Unknown=28, NotChecked=342, Total=3660 [2022-11-20 18:57:00,026 INFO L87 Difference]: Start difference. First operand 166 states and 205 transitions. Second operand has 51 states, 44 states have (on average 2.772727272727273) internal successors, (122), 44 states have internal predecessors, (122), 20 states have call successors, (28), 7 states have call predecessors, (28), 15 states have return successors, (27), 19 states have call predecessors, (27), 18 states have call successors, (27) [2022-11-20 18:57:02,194 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|))) (let ((.cse3 (select |c_#memory_$Pointer$.base| .cse2)) (.cse0 (not (= .cse2 (_ bv0 32)))) (.cse1 (= |c_dll_insert_master_#in~dll#1.base| .cse2)) (.cse4 (= (select (select |c_#memory_$Pointer$.offset| |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|) (_ bv0 32)))) (and (or (and .cse0 .cse1) (and (exists ((v_DerPreprocessor_16 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_15 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= .cse2 (select v_DerPreprocessor_16 |c_dll_insert_master_#in~dll#1.offset|)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_15) |c_dll_insert_master_#in~dll#1.base| v_DerPreprocessor_16) .cse2 v_DerPreprocessor_15) |c_dll_insert_master_#in~dll#1.base| v_DerPreprocessor_16) .cse2) .cse3))) .cse0)) (or .cse1 (and (exists ((v_DerPreprocessor_14 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_13 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= .cse3 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_13) |c_dll_insert_master_#in~dll#1.base| v_DerPreprocessor_14) .cse2 v_DerPreprocessor_13) |c_dll_insert_master_#in~dll#1.base| v_DerPreprocessor_14) .cse2)) (= (select v_DerPreprocessor_14 |c_dll_insert_master_#in~dll#1.offset|) .cse2))) (exists ((v_ArrVal_1539 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| .cse2 v_ArrVal_1539) |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|) (_ bv0 32))))) .cse4 (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (exists ((v_ArrVal_1848 (Array (_ BitVec 32) (_ BitVec 32))) (|dll_insert_master_~item~1#1.base| (_ BitVec 32))) (and (bvult |dll_insert_master_~item~1#1.base| |c_#StackHeapBarrier|) (= (select (select (store |c_old(#memory_$Pointer$.base)| |dll_insert_master_~item~1#1.base| v_ArrVal_1848) |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|) (_ bv0 32)))) (or (and (exists ((v_DerPreprocessor_23 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_22 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2078 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_19 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_20 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (select v_DerPreprocessor_23 |c_dll_insert_master_#in~dll#1.offset|))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse5 v_DerPreprocessor_19) |c_dll_insert_master_#in~dll#1.base| v_DerPreprocessor_20) .cse5 v_DerPreprocessor_19) |c_dll_insert_master_#in~dll#1.base| v_DerPreprocessor_20) .cse5) v_DerPreprocessor_19) (= .cse5 .cse2) (not (= .cse5 (_ bv0 32))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse5 v_DerPreprocessor_22) |c_dll_insert_master_#in~dll#1.base| v_DerPreprocessor_23) .cse5 v_DerPreprocessor_22) |c_dll_insert_master_#in~dll#1.base| v_DerPreprocessor_23) .cse5) v_DerPreprocessor_22) (= |c_dll_insert_master_#in~dll#1.base| .cse5) (= (select v_DerPreprocessor_20 |c_dll_insert_master_#in~dll#1.offset|) (_ bv0 32)) (= (select (select (store |c_old(#memory_$Pointer$.base)| .cse5 v_ArrVal_2078) |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|) (_ bv0 32))))) .cse4) (and .cse0 (not .cse1) (exists ((v_ArrVal_2078 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| .cse2 v_ArrVal_2078) |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|) (_ bv0 32))) .cse4))))) is different from true [2022-11-20 18:57:02,216 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|))) (let ((.cse0 (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|))) (.cse3 (not (= .cse2 (_ bv0 32)))) (.cse1 (select |c_#memory_$Pointer$.base| .cse2)) (.cse4 (= .cse2 |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|))) (and .cse0 (or (and (exists ((v_DerPreprocessor_16 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_15 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= .cse1 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_15) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base| v_DerPreprocessor_16) .cse2 v_DerPreprocessor_15) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base| v_DerPreprocessor_16) .cse2)) (= .cse2 (select v_DerPreprocessor_16 |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|)))) .cse3) (and .cse3 .cse4)) (exists ((v_ArrVal_1848 (Array (_ BitVec 32) (_ BitVec 32))) (|dll_insert_master_~item~1#1.base| (_ BitVec 32))) (and (bvult |dll_insert_master_~item~1#1.base| |c_#StackHeapBarrier|) (= (select (select (store |c_old(#memory_$Pointer$.base)| |dll_insert_master_~item~1#1.base| v_ArrVal_1848) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|) (_ bv0 32)))) (or (and .cse0 (exists ((v_DerPreprocessor_23 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_22 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2078 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_19 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_20 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (select v_DerPreprocessor_23 |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|))) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| .cse5 v_ArrVal_2078) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|) (_ bv0 32)) (= v_DerPreprocessor_22 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse5 v_DerPreprocessor_22) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base| v_DerPreprocessor_23) .cse5 v_DerPreprocessor_22) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base| v_DerPreprocessor_23) .cse5)) (= .cse5 .cse2) (= .cse5 |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) (= (select v_DerPreprocessor_20 |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|) (_ bv0 32)) (= v_DerPreprocessor_19 (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse5 v_DerPreprocessor_19) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base| v_DerPreprocessor_20) .cse5 v_DerPreprocessor_19) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base| v_DerPreprocessor_20) .cse5)) (not (= .cse5 (_ bv0 32))))))) (and .cse0 .cse3 (exists ((v_ArrVal_2078 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| .cse2 v_ArrVal_2078) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|) (_ bv0 32))) (not .cse4))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (or (and (exists ((v_DerPreprocessor_14 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_13 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= .cse2 (select v_DerPreprocessor_14 |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|)) (= .cse1 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_13) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base| v_DerPreprocessor_14) .cse2 v_DerPreprocessor_13) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base| v_DerPreprocessor_14) .cse2)))) (exists ((v_ArrVal_1539 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| .cse2 v_ArrVal_1539) |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset|) (_ bv0 32)))) .cse4)))) is different from true [2022-11-20 18:57:04,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:57:04,459 INFO L93 Difference]: Finished difference Result 366 states and 450 transitions. [2022-11-20 18:57:04,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 18:57:04,460 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 44 states have (on average 2.772727272727273) internal successors, (122), 44 states have internal predecessors, (122), 20 states have call successors, (28), 7 states have call predecessors, (28), 15 states have return successors, (27), 19 states have call predecessors, (27), 18 states have call successors, (27) Word has length 110 [2022-11-20 18:57:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:57:04,465 INFO L225 Difference]: With dead ends: 366 [2022-11-20 18:57:04,466 INFO L226 Difference]: Without dead ends: 194 [2022-11-20 18:57:04,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 315 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=299, Invalid=4505, Unknown=46, NotChecked=700, Total=5550 [2022-11-20 18:57:04,474 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 88 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1650 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 18:57:04,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 2249 Invalid, 2492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 813 Invalid, 0 Unknown, 1650 Unchecked, 2.0s Time] [2022-11-20 18:57:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-20 18:57:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 187. [2022-11-20 18:57:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 140 states have (on average 1.2428571428571429) internal successors, (174), 159 states have internal predecessors, (174), 32 states have call successors, (32), 11 states have call predecessors, (32), 14 states have return successors, (25), 19 states have call predecessors, (25), 18 states have call successors, (25) [2022-11-20 18:57:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 231 transitions. [2022-11-20 18:57:04,501 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 231 transitions. Word has length 110 [2022-11-20 18:57:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:57:04,502 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 231 transitions. [2022-11-20 18:57:04,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 44 states have (on average 2.772727272727273) internal successors, (122), 44 states have internal predecessors, (122), 20 states have call successors, (28), 7 states have call predecessors, (28), 15 states have return successors, (27), 19 states have call predecessors, (27), 18 states have call successors, (27) [2022-11-20 18:57:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 231 transitions. [2022-11-20 18:57:04,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 18:57:04,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:57:04,506 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:57:04,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 18:57:04,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-20 18:57:04,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-20 18:57:05,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:57:05,115 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:57:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:57:05,116 INFO L85 PathProgramCache]: Analyzing trace with hash -923662501, now seen corresponding path program 1 times [2022-11-20 18:57:05,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:57:05,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251819089] [2022-11-20 18:57:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:57:05,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:57:05,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:57:05,118 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:57:05,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-20 18:57:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:57:05,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 18:57:05,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:57:05,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 18:57:06,195 WARN L859 $PredicateComparison]: unable to prove that (exists ((|dll_insert_master_alloc_or_die_master_~ptr~1#1.base| (_ BitVec 32)) (v_ArrVal_2390 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2391 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| |dll_insert_master_alloc_or_die_master_~ptr~1#1.base| v_ArrVal_2391) |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|) |c_dll_insert_master_~next~3#1.base|) (= (_ bv0 1) (select |c_old(#valid)| |dll_insert_master_alloc_or_die_master_~ptr~1#1.base|)) (= |c_dll_insert_master_~next~3#1.offset| (select (select (store |c_old(#memory_$Pointer$.offset)| |dll_insert_master_alloc_or_die_master_~ptr~1#1.base| v_ArrVal_2390) |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|)))) is different from true [2022-11-20 18:57:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 92 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 18:57:06,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:57:07,692 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_dll_insert_master_alloc_or_die_master_~ptr~1#1.base_139| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_dll_insert_master_alloc_or_die_master_~ptr~1#1.base_139|) (_ bv0 1))) (forall ((v_ArrVal_2418 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |v_dll_insert_master_alloc_or_die_master_~ptr~1#1.base_139| v_ArrVal_2418) |c_dll_create_generic_~#dll~0.base|) |c_dll_create_generic_~#dll~0.offset|) (_ bv0 32))))) (forall ((|v_dll_insert_master_alloc_or_die_master_~ptr~1#1.base_139| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_dll_insert_master_alloc_or_die_master_~ptr~1#1.base_139|) (_ bv0 1))) (forall ((v_ArrVal_2417 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |v_dll_insert_master_alloc_or_die_master_~ptr~1#1.base_139| v_ArrVal_2417) |c_dll_create_generic_~#dll~0.base|) |c_dll_create_generic_~#dll~0.offset|) (_ bv0 32)))))) is different from false [2022-11-20 18:57:07,695 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:57:07,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251819089] [2022-11-20 18:57:07,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251819089] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:57:07,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [40021898] [2022-11-20 18:57:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:57:07,696 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 18:57:07,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 18:57:07,697 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 18:57:07,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-20 18:57:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:57:09,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 18:57:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:57:09,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 18:57:09,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 18:57:10,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 18:57:10,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-20 18:57:10,097 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 18:57:10,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-11-20 18:57:10,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-11-20 18:57:10,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-20 18:57:10,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-20 18:57:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 93 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 18:57:10,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:57:12,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [40021898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:57:12,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255930878] [2022-11-20 18:57:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:57:12,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:57:12,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:57:12,404 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:57:12,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 18:57:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:57:12,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 18:57:12,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:57:13,559 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:57:13,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:57:13,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:57:13,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 18:57:13,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:57:13,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 19 [2022-11-20 18:57:13,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 18:57:18,658 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:57:18,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:57:18,767 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:57:18,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:57:18,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:57:18,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:57:18,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 18:57:18,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:57:18,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 15 [2022-11-20 18:57:18,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 18:57:19,053 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-20 18:57:19,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 94 [2022-11-20 18:57:19,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 71 [2022-11-20 18:57:22,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 115 [2022-11-20 18:57:22,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 108 [2022-11-20 18:57:22,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 18:57:23,270 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 18:57:23,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2022-11-20 18:57:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 39 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-20 18:57:23,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:57:29,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-20 18:57:29,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2022-11-20 18:57:29,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2022-11-20 18:57:29,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2022-11-20 18:57:29,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255930878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:57:29,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:57:29,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 26] total 43 [2022-11-20 18:57:29,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904385311] [2022-11-20 18:57:29,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 18:57:29,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 18:57:29,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:57:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 18:57:29,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2372, Unknown=42, NotChecked=198, Total=2756 [2022-11-20 18:57:29,467 INFO L87 Difference]: Start difference. First operand 187 states and 231 transitions. Second operand has 43 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 16 states have call successors, (27), 7 states have call predecessors, (27), 12 states have return successors, (25), 14 states have call predecessors, (25), 15 states have call successors, (25) [2022-11-20 18:57:31,993 WARN L859 $PredicateComparison]: unable to prove that (and (or (exists ((|dll_insert_master_~item~1#1.base| (_ BitVec 32))) (and (bvult |dll_insert_master_~item~1#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2619 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.offset)| |dll_insert_master_~item~1#1.base| v_ArrVal_2619) |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|) (_ bv0 32)))))) (exists ((|dll_insert_master_~item~1#1.base| (_ BitVec 32))) (and (bvult |dll_insert_master_~item~1#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2618 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.base)| |dll_insert_master_~item~1#1.base| v_ArrVal_2618) |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|) (_ bv0 32))))))) (or (exists ((|dll_insert_master_alloc_or_die_master_~ptr~1#1.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |dll_insert_master_alloc_or_die_master_~ptr~1#1.base|)) (exists ((v_ArrVal_2390 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.offset)| |dll_insert_master_alloc_or_die_master_~ptr~1#1.base| v_ArrVal_2390) |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|) (_ bv0 32)))))) (exists ((|dll_insert_master_alloc_or_die_master_~ptr~1#1.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |dll_insert_master_alloc_or_die_master_~ptr~1#1.base|)) (exists ((v_ArrVal_2391 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.base)| |dll_insert_master_alloc_or_die_master_~ptr~1#1.base| v_ArrVal_2391) |c_dll_insert_master_#in~dll#1.base|) |c_dll_insert_master_#in~dll#1.offset|) (_ bv0 32))))))) (= |c_dll_insert_master_#in~dll#1.base| |c_dll_insert_master_~dll#1.base|) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (not (= |c_dll_insert_master_~item~1#1.base| (_ bv0 32))) (= |c_dll_insert_master_~dll#1.offset| |c_dll_insert_master_#in~dll#1.offset|)) is different from true [2022-11-20 18:57:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:57:41,578 INFO L93 Difference]: Finished difference Result 413 states and 507 transitions. [2022-11-20 18:57:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 18:57:41,580 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 16 states have call successors, (27), 7 states have call predecessors, (27), 12 states have return successors, (25), 14 states have call predecessors, (25), 15 states have call successors, (25) Word has length 110 [2022-11-20 18:57:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:57:41,582 INFO L225 Difference]: With dead ends: 413 [2022-11-20 18:57:41,582 INFO L226 Difference]: Without dead ends: 206 [2022-11-20 18:57:41,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 422 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=331, Invalid=5445, Unknown=88, NotChecked=456, Total=6320 [2022-11-20 18:57:41,586 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 90 mSDsluCounter, 2240 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1395 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 18:57:41,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 2360 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1127 Invalid, 0 Unknown, 1395 Unchecked, 3.3s Time] [2022-11-20 18:57:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-20 18:57:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2022-11-20 18:57:41,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 153 states have (on average 1.2222222222222223) internal successors, (187), 170 states have internal predecessors, (187), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-11-20 18:57:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 239 transitions. [2022-11-20 18:57:41,612 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 239 transitions. Word has length 110 [2022-11-20 18:57:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:57:41,613 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 239 transitions. [2022-11-20 18:57:41,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 16 states have call successors, (27), 7 states have call predecessors, (27), 12 states have return successors, (25), 14 states have call predecessors, (25), 15 states have call successors, (25) [2022-11-20 18:57:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 239 transitions. [2022-11-20 18:57:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 18:57:41,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:57:41,616 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:57:41,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-20 18:57:41,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 18:57:42,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-20 18:57:42,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 18:57:42,241 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:57:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:57:42,241 INFO L85 PathProgramCache]: Analyzing trace with hash -73438501, now seen corresponding path program 2 times [2022-11-20 18:57:42,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:57:42,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200251956] [2022-11-20 18:57:42,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 18:57:42,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:57:42,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:57:42,244 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:57:42,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca98a4e7-3527-455d-b083-28edd9b05add/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 18:57:43,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 18:57:43,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:57:43,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 145 conjunts are in the unsatisfiable core [2022-11-20 18:57:43,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:57:43,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 18:57:43,861 WARN L859 $PredicateComparison]: unable to prove that (exists ((|##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_3168 (_ BitVec 1))) (= (store |c_old(#valid)| |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| v_ArrVal_3168) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base|)))) is different from true [2022-11-20 18:57:45,991 WARN L859 $PredicateComparison]: unable to prove that (exists ((|##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_3169 (_ BitVec 1))) (= (store |c_old(#valid)| |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| v_ArrVal_3169) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base|)))) is different from true [2022-11-20 18:57:50,506 WARN L859 $PredicateComparison]: unable to prove that (exists ((|##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| (_ BitVec 32)) (|v_dll_create_generic_~#dll~0.base_278| (_ BitVec 32)) (v_ArrVal_3170 (_ BitVec 1)) (|v_##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base_442| (_ BitVec 32)) (v_ArrVal_3167 (_ BitVec 1)) (v_ArrVal_3168 (_ BitVec 1)) (v_ArrVal_3169 (_ BitVec 1))) (let ((.cse1 (store |c_old(#valid)| |v_dll_create_generic_~#dll~0.base_278| v_ArrVal_3167))) (let ((.cse0 (store .cse1 |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base| v_ArrVal_3168))) (and (= (_ bv0 1) (select .cse0 |v_##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base_442|)) (= (_ bv0 1) (select .cse1 |##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base|)) (= (select |c_old(#valid)| |v_dll_create_generic_~#dll~0.base_278|) (_ bv0 1)) (= |c_#valid| (store (store .cse0 |v_##fun~$Pointer$~TO~VOID_alloc_or_die_slave_~ptr~0#1.base_442| v_ArrVal_3169) |v_dll_create_generic_~#dll~0.base_278| v_ArrVal_3170)))))) is different from true [2022-11-20 18:57:50,829 INFO L321 Elim1Store]: treesize reduction 132, result has 29.4 percent of original size [2022-11-20 18:57:50,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 144 treesize of output 180 [2022-11-20 18:57:51,001 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:57:51,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:57:51,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:57:51,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 18:57:51,116 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-20 18:57:51,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 35 [2022-11-20 18:57:51,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-11-20 18:57:55,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 18:57:56,458 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3181 (_ BitVec 1)) (v_ArrVal_3183 (Array (_ BitVec 32) (_ BitVec 32))) (|##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0#1.base| (_ BitVec 32))) (and (= |c_#memory_$Pointer$.base| (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0#1.base| v_ArrVal_3183))) (store .cse0 |c_##fun~$Pointer$~TO~VOID_#in~10#1.base| (store (select .cse0 |c_##fun~$Pointer$~TO~VOID_#in~10#1.base|) |c_##fun~$Pointer$~TO~VOID_#in~10#1.offset| |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0#1.base|)))) (= (store |c_old(#valid)| |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0#1.base| v_ArrVal_3181) |c_#valid|) (= (select |c_old(#valid)| |##fun~$Pointer$~TO~VOID_dll_insert_slave_~item~0#1.base|) (_ bv0 1)))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32)))) is different from true [2022-11-20 18:57:58,762 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 18:57:58,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 18:58:02,296 INFO L217 Elim1Store]: Index analysis took 177 ms [2022-11-20 18:58:04,697 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 18:58:04,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 18:58:04,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:58:05,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 18:58:05,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 18:58:05,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-11-20 18:58:05,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 18:58:07,064 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 18:58:07,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 161 [2022-11-20 18:58:42,351 WARN L233 SmtUtils]: Spent 6.54s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:59:22,051 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)