./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:58:10,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:58:10,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:58:10,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:58:10,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:58:10,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:58:10,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:58:10,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:58:10,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:58:10,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:58:10,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:58:10,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:58:10,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:58:10,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:58:10,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:58:10,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:58:10,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:58:10,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:58:10,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:58:10,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:58:10,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:58:10,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:58:10,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:58:10,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:58:10,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:58:10,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:58:10,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:58:10,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:58:10,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:58:10,193 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:58:10,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:58:10,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:58:10,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:58:10,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:58:10,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:58:10,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:58:10,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:58:10,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:58:10,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:58:10,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:58:10,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:58:10,202 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:58:10,244 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:58:10,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:58:10,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:58:10,248 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:58:10,249 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:58:10,250 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:58:10,250 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:58:10,250 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:58:10,250 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:58:10,250 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:58:10,252 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:58:10,252 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:58:10,252 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:58:10,252 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:58:10,252 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:58:10,253 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:58:10,253 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:58:10,253 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:58:10,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:58:10,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:58:10,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:58:10,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:58:10,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:58:10,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:58:10,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:58:10,257 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:58:10,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:58:10,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:58:10,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:58:10,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:58:10,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:58:10,259 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:58:10,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:58:10,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:58:10,260 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:58:10,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:58:10,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:58:10,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:58:10,261 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_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b [2022-11-03 01:58:10,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:58:10,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:58:10,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:58:10,537 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:58:10,538 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:58:10,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 01:58:10,629 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/data/09406d512/24f4d617615e4475ac8f0d459448888b/FLAG2e02352e3 [2022-11-03 01:58:11,475 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:58:11,476 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 01:58:11,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/data/09406d512/24f4d617615e4475ac8f0d459448888b/FLAG2e02352e3 [2022-11-03 01:58:11,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/data/09406d512/24f4d617615e4475ac8f0d459448888b [2022-11-03 01:58:11,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:58:11,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:58:11,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:58:11,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:58:11,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:58:11,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:58:11" (1/1) ... [2022-11-03 01:58:11,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38c62074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:11, skipping insertion in model container [2022-11-03 01:58:11,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:58:11" (1/1) ... [2022-11-03 01:58:11,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:58:11,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:58:12,700 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2022-11-03 01:58:12,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:58:12,763 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:58:12,964 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2022-11-03 01:58:12,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:58:13,026 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:58:13,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13 WrapperNode [2022-11-03 01:58:13,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:58:13,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:58:13,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:58:13,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:58:13,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,147 INFO L138 Inliner]: procedures = 107, calls = 309, calls flagged for inlining = 47, calls inlined = 41, statements flattened = 760 [2022-11-03 01:58:13,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:58:13,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:58:13,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:58:13,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:58:13,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,245 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:58:13,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:58:13,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:58:13,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:58:13,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13" (1/1) ... [2022-11-03 01:58:13,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:58:13,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:13,322 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:58:13,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:58:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 01:58:13,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 01:58:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:58:13,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 01:58:13,366 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 01:58:13,366 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 01:58:13,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 01:58:13,366 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 01:58:13,366 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 01:58:13,367 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2022-11-03 01:58:13,367 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2022-11-03 01:58:13,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:58:13,367 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 01:58:13,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 01:58:13,367 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 01:58:13,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 01:58:13,368 INFO L130 BoogieDeclarations]: Found specification of procedure usb_acecad_disconnect [2022-11-03 01:58:13,368 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_acecad_disconnect [2022-11-03 01:58:13,368 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 01:58:13,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 01:58:13,368 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:58:13,369 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:58:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:58:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:58:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 01:58:13,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 01:58:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:58:13,370 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2022-11-03 01:58:13,370 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2022-11-03 01:58:13,370 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-03 01:58:13,370 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-03 01:58:13,370 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_7 [2022-11-03 01:58:13,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_7 [2022-11-03 01:58:13,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:58:13,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:58:13,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:58:13,371 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 01:58:13,371 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 01:58:13,371 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 01:58:13,372 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 01:58:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:58:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:58:13,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:58:13,707 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:58:13,712 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:58:13,825 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 01:58:14,717 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:58:15,018 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:58:15,019 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 01:58:15,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:58:15 BoogieIcfgContainer [2022-11-03 01:58:15,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:58:15,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:58:15,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:58:15,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:58:15,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:58:11" (1/3) ... [2022-11-03 01:58:15,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505bea92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:58:15, skipping insertion in model container [2022-11-03 01:58:15,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:13" (2/3) ... [2022-11-03 01:58:15,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505bea92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:58:15, skipping insertion in model container [2022-11-03 01:58:15,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:58:15" (3/3) ... [2022-11-03 01:58:15,033 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 01:58:15,052 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:58:15,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:58:15,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:58:15,139 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;@49e18944, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:58:15,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:58:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 108 states have internal predecessors, (133), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-03 01:58:15,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 01:58:15,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:15,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:15,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:15,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:15,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1761918605, now seen corresponding path program 1 times [2022-11-03 01:58:15,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:15,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024822638] [2022-11-03 01:58:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:15,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:15,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:15,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024822638] [2022-11-03 01:58:15,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024822638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:15,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:15,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:58:15,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276040707] [2022-11-03 01:58:15,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:15,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:15,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:15,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:15,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:15,705 INFO L87 Difference]: Start difference. First operand has 156 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 108 states have internal predecessors, (133), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:58:16,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:16,662 INFO L93 Difference]: Finished difference Result 442 states and 608 transitions. [2022-11-03 01:58:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:16,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-11-03 01:58:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:16,680 INFO L225 Difference]: With dead ends: 442 [2022-11-03 01:58:16,683 INFO L226 Difference]: Without dead ends: 277 [2022-11-03 01:58:16,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:16,698 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 176 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:16,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 373 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:58:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-03 01:58:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-11-03 01:58:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 177 states have (on average 1.305084745762712) internal successors, (231), 185 states have internal predecessors, (231), 71 states have call successors, (71), 29 states have call predecessors, (71), 28 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-03 01:58:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 368 transitions. [2022-11-03 01:58:16,813 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 368 transitions. Word has length 23 [2022-11-03 01:58:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:16,815 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 368 transitions. [2022-11-03 01:58:16,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:58:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 368 transitions. [2022-11-03 01:58:16,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 01:58:16,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:16,822 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] [2022-11-03 01:58:16,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:58:16,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:16,824 INFO L85 PathProgramCache]: Analyzing trace with hash -427197548, now seen corresponding path program 1 times [2022-11-03 01:58:16,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:16,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638282860] [2022-11-03 01:58:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:16,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:58:17,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:17,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638282860] [2022-11-03 01:58:17,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638282860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:17,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:17,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:58:17,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921315762] [2022-11-03 01:58:17,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:17,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:17,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:17,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:17,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:17,272 INFO L87 Difference]: Start difference. First operand 277 states and 368 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:58:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:18,165 INFO L93 Difference]: Finished difference Result 481 states and 631 transitions. [2022-11-03 01:58:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:18,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2022-11-03 01:58:18,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:18,173 INFO L225 Difference]: With dead ends: 481 [2022-11-03 01:58:18,175 INFO L226 Difference]: Without dead ends: 478 [2022-11-03 01:58:18,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:18,179 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 133 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:18,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 343 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:58:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-11-03 01:58:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 458. [2022-11-03 01:58:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 299 states have (on average 1.3076923076923077) internal successors, (391), 313 states have internal predecessors, (391), 110 states have call successors, (110), 49 states have call predecessors, (110), 48 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-03 01:58:18,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 606 transitions. [2022-11-03 01:58:18,241 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 606 transitions. Word has length 37 [2022-11-03 01:58:18,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:18,242 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 606 transitions. [2022-11-03 01:58:18,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:58:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 606 transitions. [2022-11-03 01:58:18,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 01:58:18,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:18,249 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] [2022-11-03 01:58:18,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:58:18,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:18,260 INFO L85 PathProgramCache]: Analyzing trace with hash -358217688, now seen corresponding path program 1 times [2022-11-03 01:58:18,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:18,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949787955] [2022-11-03 01:58:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:18,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:58:18,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:18,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949787955] [2022-11-03 01:58:18,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949787955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:18,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:18,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:58:18,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817159228] [2022-11-03 01:58:18,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:18,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:18,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:18,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:18,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:18,543 INFO L87 Difference]: Start difference. First operand 458 states and 606 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:58:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:19,076 INFO L93 Difference]: Finished difference Result 460 states and 607 transitions. [2022-11-03 01:58:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:19,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-11-03 01:58:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:19,081 INFO L225 Difference]: With dead ends: 460 [2022-11-03 01:58:19,081 INFO L226 Difference]: Without dead ends: 457 [2022-11-03 01:58:19,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:19,082 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 181 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:19,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 160 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:58:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-03 01:58:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2022-11-03 01:58:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 299 states have (on average 1.3043478260869565) internal successors, (390), 312 states have internal predecessors, (390), 109 states have call successors, (109), 49 states have call predecessors, (109), 48 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-03 01:58:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 604 transitions. [2022-11-03 01:58:19,125 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 604 transitions. Word has length 38 [2022-11-03 01:58:19,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:19,126 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 604 transitions. [2022-11-03 01:58:19,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:58:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 604 transitions. [2022-11-03 01:58:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 01:58:19,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:19,128 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] [2022-11-03 01:58:19,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:58:19,128 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:19,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1780162839, now seen corresponding path program 1 times [2022-11-03 01:58:19,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:19,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861893314] [2022-11-03 01:58:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:19,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:58:19,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:19,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861893314] [2022-11-03 01:58:19,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861893314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:19,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:19,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:58:19,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904922250] [2022-11-03 01:58:19,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:19,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:19,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:19,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:19,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:19,209 INFO L87 Difference]: Start difference. First operand 457 states and 604 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:58:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:19,882 INFO L93 Difference]: Finished difference Result 459 states and 605 transitions. [2022-11-03 01:58:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-11-03 01:58:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:19,885 INFO L225 Difference]: With dead ends: 459 [2022-11-03 01:58:19,885 INFO L226 Difference]: Without dead ends: 456 [2022-11-03 01:58:19,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:19,887 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 178 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:19,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 158 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:58:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-11-03 01:58:19,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2022-11-03 01:58:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 299 states have (on average 1.3010033444816054) internal successors, (389), 311 states have internal predecessors, (389), 108 states have call successors, (108), 49 states have call predecessors, (108), 48 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-03 01:58:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 602 transitions. [2022-11-03 01:58:19,954 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 602 transitions. Word has length 39 [2022-11-03 01:58:19,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:19,957 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 602 transitions. [2022-11-03 01:58:19,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:58:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 602 transitions. [2022-11-03 01:58:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:58:19,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:19,962 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] [2022-11-03 01:58:19,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:58:19,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:19,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash -649512693, now seen corresponding path program 1 times [2022-11-03 01:58:19,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:19,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129794193] [2022-11-03 01:58:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:58:20,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:20,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129794193] [2022-11-03 01:58:20,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129794193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:20,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:20,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:58:20,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135100308] [2022-11-03 01:58:20,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:20,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:20,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:20,080 INFO L87 Difference]: Start difference. First operand 456 states and 602 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:58:21,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:21,025 INFO L93 Difference]: Finished difference Result 458 states and 603 transitions. [2022-11-03 01:58:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:21,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-11-03 01:58:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:21,030 INFO L225 Difference]: With dead ends: 458 [2022-11-03 01:58:21,031 INFO L226 Difference]: Without dead ends: 455 [2022-11-03 01:58:21,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:21,034 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 175 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:21,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 156 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:58:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-03 01:58:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2022-11-03 01:58:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 299 states have (on average 1.2976588628762542) internal successors, (388), 310 states have internal predecessors, (388), 107 states have call successors, (107), 49 states have call predecessors, (107), 48 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-03 01:58:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 600 transitions. [2022-11-03 01:58:21,096 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 600 transitions. Word has length 40 [2022-11-03 01:58:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:21,097 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 600 transitions. [2022-11-03 01:58:21,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:58:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 600 transitions. [2022-11-03 01:58:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 01:58:21,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:21,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:21,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:58:21,100 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:21,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1339962010, now seen corresponding path program 1 times [2022-11-03 01:58:21,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:21,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445841648] [2022-11-03 01:58:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:21,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:58:21,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:21,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445841648] [2022-11-03 01:58:21,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445841648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:21,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:21,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:58:21,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022553176] [2022-11-03 01:58:21,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:21,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:21,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:21,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:21,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:21,231 INFO L87 Difference]: Start difference. First operand 455 states and 600 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:58:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:21,580 INFO L93 Difference]: Finished difference Result 457 states and 601 transitions. [2022-11-03 01:58:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:21,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-11-03 01:58:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:21,583 INFO L225 Difference]: With dead ends: 457 [2022-11-03 01:58:21,583 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 01:58:21,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:21,585 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 172 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:21,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 155 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:58:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 01:58:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2022-11-03 01:58:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 293 states have (on average 1.2935153583617747) internal successors, (379), 303 states have internal predecessors, (379), 106 states have call successors, (106), 49 states have call predecessors, (106), 48 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-03 01:58:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 590 transitions. [2022-11-03 01:58:21,630 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 590 transitions. Word has length 41 [2022-11-03 01:58:21,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:21,630 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 590 transitions. [2022-11-03 01:58:21,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 01:58:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 590 transitions. [2022-11-03 01:58:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 01:58:21,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:21,634 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:21,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:58:21,635 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:21,635 INFO L85 PathProgramCache]: Analyzing trace with hash 990053141, now seen corresponding path program 1 times [2022-11-03 01:58:21,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:21,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179548213] [2022-11-03 01:58:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:21,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 01:58:21,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:21,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179548213] [2022-11-03 01:58:21,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179548213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:21,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:21,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:58:21,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395608512] [2022-11-03 01:58:21,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:21,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:21,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:21,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:21,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:21,858 INFO L87 Difference]: Start difference. First operand 448 states and 590 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:58:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:22,785 INFO L93 Difference]: Finished difference Result 730 states and 962 transitions. [2022-11-03 01:58:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:22,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-03 01:58:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:22,788 INFO L225 Difference]: With dead ends: 730 [2022-11-03 01:58:22,788 INFO L226 Difference]: Without dead ends: 293 [2022-11-03 01:58:22,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:22,790 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 31 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:22,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 296 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:58:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-03 01:58:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 288. [2022-11-03 01:58:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 199 states have (on average 1.3165829145728642) internal successors, (262), 204 states have internal predecessors, (262), 58 states have call successors, (58), 31 states have call predecessors, (58), 30 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2022-11-03 01:58:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 377 transitions. [2022-11-03 01:58:22,814 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 377 transitions. Word has length 113 [2022-11-03 01:58:22,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:22,814 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 377 transitions. [2022-11-03 01:58:22,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:58:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 377 transitions. [2022-11-03 01:58:22,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-03 01:58:22,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:22,817 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:22,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:58:22,817 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:22,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1338285077, now seen corresponding path program 1 times [2022-11-03 01:58:22,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:22,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671677967] [2022-11-03 01:58:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:22,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-03 01:58:23,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671677967] [2022-11-03 01:58:23,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671677967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:23,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942145215] [2022-11-03 01:58:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:23,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:23,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:23,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:23,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:58:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:23,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 01:58:23,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 01:58:24,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 01:58:24,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942145215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:24,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593461231] [2022-11-03 01:58:24,409 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2022-11-03 01:58:24,409 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:58:24,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:58:24,418 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:58:24,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:58:25,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:58:25,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:58:25,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 6 [2022-11-03 01:58:25,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:25,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 57 select indices, 57 select index equivalence classes, 705 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 0 case distinctions, treesize of input 490 treesize of output 172 [2022-11-03 01:58:26,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:26,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 57 select indices, 57 select index equivalence classes, 705 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 0 case distinctions, treesize of input 490 treesize of output 172 [2022-11-03 01:58:27,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 4 [2022-11-03 01:58:27,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-03 01:58:27,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-03 01:58:28,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-03 01:58:28,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 4 [2022-11-03 01:58:28,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-03 01:58:30,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-03 01:58:30,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-03 01:58:30,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-03 01:58:30,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-03 01:58:35,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-03 01:58:35,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-03 01:58:35,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-03 01:58:35,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-03 01:58:43,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:43,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:43,205 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 01:58:43,208 INFO L158 Benchmark]: Toolchain (without parser) took 31573.19ms. Allocated memory was 132.1MB in the beginning and 539.0MB in the end (delta: 406.8MB). Free memory was 91.0MB in the beginning and 326.6MB in the end (delta: -235.6MB). Peak memory consumption was 330.2MB. Max. memory is 16.1GB. [2022-11-03 01:58:43,209 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 132.1MB. Free memory was 105.8MB in the beginning and 105.8MB in the end (delta: 33.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:58:43,209 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1390.72ms. Allocated memory is still 132.1MB. Free memory was 90.7MB in the beginning and 52.2MB in the end (delta: 38.5MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-11-03 01:58:43,209 INFO L158 Benchmark]: Boogie Procedure Inliner took 119.34ms. Allocated memory is still 132.1MB. Free memory was 52.2MB in the beginning and 45.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 01:58:43,209 INFO L158 Benchmark]: Boogie Preprocessor took 107.96ms. Allocated memory is still 132.1MB. Free memory was 45.9MB in the beginning and 95.2MB in the end (delta: -49.3MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2022-11-03 01:58:43,210 INFO L158 Benchmark]: RCFGBuilder took 1765.81ms. Allocated memory was 132.1MB in the beginning and 178.3MB in the end (delta: 46.1MB). Free memory was 95.2MB in the beginning and 81.4MB in the end (delta: 13.8MB). Peak memory consumption was 60.7MB. Max. memory is 16.1GB. [2022-11-03 01:58:43,210 INFO L158 Benchmark]: TraceAbstraction took 28182.06ms. Allocated memory was 178.3MB in the beginning and 539.0MB in the end (delta: 360.7MB). Free memory was 80.3MB in the beginning and 326.6MB in the end (delta: -246.2MB). Peak memory consumption was 272.8MB. Max. memory is 16.1GB. [2022-11-03 01:58:43,213 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 132.1MB. Free memory was 105.8MB in the beginning and 105.8MB in the end (delta: 33.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1390.72ms. Allocated memory is still 132.1MB. Free memory was 90.7MB in the beginning and 52.2MB in the end (delta: 38.5MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 119.34ms. Allocated memory is still 132.1MB. Free memory was 52.2MB in the beginning and 45.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 107.96ms. Allocated memory is still 132.1MB. Free memory was 45.9MB in the beginning and 95.2MB in the end (delta: -49.3MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1765.81ms. Allocated memory was 132.1MB in the beginning and 178.3MB in the end (delta: 46.1MB). Free memory was 95.2MB in the beginning and 81.4MB in the end (delta: 13.8MB). Peak memory consumption was 60.7MB. Max. memory is 16.1GB. * TraceAbstraction took 28182.06ms. Allocated memory was 178.3MB in the beginning and 539.0MB in the end (delta: 360.7MB). Free memory was 80.3MB in the beginning and 326.6MB in the end (delta: -246.2MB). Peak memory consumption was 272.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 01:58:43,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:58:45,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:58:45,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:58:45,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:58:45,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:58:45,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:58:45,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:58:45,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:58:45,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:58:45,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:58:45,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:58:45,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:58:45,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:58:45,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:58:45,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:58:45,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:58:45,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:58:45,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:58:45,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:58:45,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:58:45,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:58:45,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:58:45,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:58:45,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:58:45,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:58:45,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:58:45,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:58:45,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:58:45,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:58:45,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:58:45,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:58:45,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:58:45,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:58:45,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:58:45,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:58:45,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:58:45,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:58:45,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:58:45,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:58:45,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:58:45,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:58:45,669 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:58:45,693 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:58:45,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:58:45,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:58:45,694 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:58:45,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:58:45,695 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:58:45,695 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:58:45,695 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:58:45,696 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:58:45,696 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:58:45,696 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:58:45,696 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:58:45,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:58:45,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:58:45,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:58:45,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:58:45,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:58:45,698 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:58:45,698 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:58:45,699 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:58:45,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:58:45,699 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:58:45,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:58:45,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:58:45,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:58:45,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:58:45,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:58:45,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:58:45,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:58:45,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:58:45,701 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:58:45,701 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:58:45,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:58:45,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:58:45,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:58:45,702 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_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b [2022-11-03 01:58:46,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:58:46,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:58:46,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:58:46,144 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:58:46,145 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:58:46,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 01:58:46,229 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/data/41b8721c7/be246da0680b448b9d03aa9d2b1aabdb/FLAGd4e8fa329 [2022-11-03 01:58:47,059 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:58:47,061 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 01:58:47,100 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/data/41b8721c7/be246da0680b448b9d03aa9d2b1aabdb/FLAGd4e8fa329 [2022-11-03 01:58:47,148 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/data/41b8721c7/be246da0680b448b9d03aa9d2b1aabdb [2022-11-03 01:58:47,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:58:47,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:58:47,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:58:47,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:58:47,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:58:47,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:58:47" (1/1) ... [2022-11-03 01:58:47,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@140f1bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:47, skipping insertion in model container [2022-11-03 01:58:47,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:58:47" (1/1) ... [2022-11-03 01:58:47,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:58:47,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:58:48,152 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2022-11-03 01:58:48,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:58:48,253 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 01:58:48,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:58:48,456 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2022-11-03 01:58:48,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:58:48,476 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:58:48,650 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2022-11-03 01:58:48,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:58:48,716 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:58:48,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48 WrapperNode [2022-11-03 01:58:48,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:58:48,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:58:48,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:58:48,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:58:48,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48" (1/1) ... [2022-11-03 01:58:48,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48" (1/1) ... [2022-11-03 01:58:48,847 INFO L138 Inliner]: procedures = 116, calls = 309, calls flagged for inlining = 47, calls inlined = 41, statements flattened = 740 [2022-11-03 01:58:48,850 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:58:48,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:58:48,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:58:48,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:58:48,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48" (1/1) ... [2022-11-03 01:58:48,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48" (1/1) ... [2022-11-03 01:58:48,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48" (1/1) ... [2022-11-03 01:58:48,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48" (1/1) ... [2022-11-03 01:58:48,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48" (1/1) ... [2022-11-03 01:58:48,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48" (1/1) ... [2022-11-03 01:58:48,976 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48" (1/1) ... [2022-11-03 01:58:48,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48" (1/1) ... [2022-11-03 01:58:49,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:58:49,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:58:49,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:58:49,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:58:49,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48" (1/1) ... [2022-11-03 01:58:49,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:58:49,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:49,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:58:49,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:58:49,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 01:58:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-03 01:58:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 01:58:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-11-03 01:58:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 01:58:49,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 01:58:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 01:58:49,098 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 01:58:49,099 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 01:58:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 01:58:49,099 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 01:58:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 01:58:49,099 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2022-11-03 01:58:49,099 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2022-11-03 01:58:49,100 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 01:58:49,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 01:58:49,100 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 01:58:49,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 01:58:49,100 INFO L130 BoogieDeclarations]: Found specification of procedure usb_acecad_disconnect [2022-11-03 01:58:49,100 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_acecad_disconnect [2022-11-03 01:58:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 01:58:49,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 01:58:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:58:49,101 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:58:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:58:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:58:49,101 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 01:58:49,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 01:58:49,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:58:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2022-11-03 01:58:49,103 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2022-11-03 01:58:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-03 01:58:49,103 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-03 01:58:49,103 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_7 [2022-11-03 01:58:49,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_7 [2022-11-03 01:58:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:58:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-03 01:58:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-11-03 01:58:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:58:49,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 01:58:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:58:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-11-03 01:58:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 01:58:49,105 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 01:58:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 01:58:49,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-03 01:58:49,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2022-11-03 01:58:49,106 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 01:58:49,107 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 01:58:49,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:58:49,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:58:49,486 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:58:49,489 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:58:49,587 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 01:58:55,172 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:58:55,180 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:58:55,181 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 01:58:55,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:58:55 BoogieIcfgContainer [2022-11-03 01:58:55,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:58:55,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:58:55,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:58:55,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:58:55,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:58:47" (1/3) ... [2022-11-03 01:58:55,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64476869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:58:55, skipping insertion in model container [2022-11-03 01:58:55,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:48" (2/3) ... [2022-11-03 01:58:55,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64476869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:58:55, skipping insertion in model container [2022-11-03 01:58:55,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:58:55" (3/3) ... [2022-11-03 01:58:55,193 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 01:58:55,211 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:58:55,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:58:55,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:58:55,283 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;@7249eb9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:58:55,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:58:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 171 states have (on average 1.3099415204678362) internal successors, (224), 183 states have internal predecessors, (224), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-03 01:58:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 01:58:55,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:55,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:55,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:55,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1798989029, now seen corresponding path program 1 times [2022-11-03 01:58:55,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:55,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033694953] [2022-11-03 01:58:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:55,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:55,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:55,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:55,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:58:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:55,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 01:58:55,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:55,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:55,737 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:55,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033694953] [2022-11-03 01:58:55,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033694953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:55,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:55,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:58:55,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2455651] [2022-11-03 01:58:55,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:55,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:58:55,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:58:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:58:55,797 INFO L87 Difference]: Start difference. First operand has 231 states, 171 states have (on average 1.3099415204678362) internal successors, (224), 183 states have internal predecessors, (224), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:58:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:55,862 INFO L93 Difference]: Finished difference Result 457 states and 617 transitions. [2022-11-03 01:58:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:58:55,864 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-11-03 01:58:55,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:55,896 INFO L225 Difference]: With dead ends: 457 [2022-11-03 01:58:55,896 INFO L226 Difference]: Without dead ends: 220 [2022-11-03 01:58:55,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:58:55,903 INFO L413 NwaCegarLoop]: 298 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, 298 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:55,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:58:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-03 01:58:55,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-11-03 01:58:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 166 states have (on average 1.2771084337349397) internal successors, (212), 172 states have internal predecessors, (212), 39 states have call successors, (39), 15 states have call predecessors, (39), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-03 01:58:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 285 transitions. [2022-11-03 01:58:55,959 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 285 transitions. Word has length 32 [2022-11-03 01:58:55,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:55,960 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 285 transitions. [2022-11-03 01:58:55,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:58:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 285 transitions. [2022-11-03 01:58:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 01:58:55,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:55,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:55,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:56,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:56,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:56,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:56,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1376287203, now seen corresponding path program 1 times [2022-11-03 01:58:56,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:56,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891827114] [2022-11-03 01:58:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:56,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:56,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:56,168 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:56,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:58:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:56,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:58:56,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:56,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:56,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:56,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891827114] [2022-11-03 01:58:56,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891827114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:56,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:56,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:58:56,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185196605] [2022-11-03 01:58:56,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:56,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:56,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:56,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:56,515 INFO L87 Difference]: Start difference. First operand 220 states and 285 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:58:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:56,670 INFO L93 Difference]: Finished difference Result 624 states and 811 transitions. [2022-11-03 01:58:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:56,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-11-03 01:58:56,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:56,677 INFO L225 Difference]: With dead ends: 624 [2022-11-03 01:58:56,677 INFO L226 Difference]: Without dead ends: 409 [2022-11-03 01:58:56,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:56,684 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 250 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:56,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 589 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-11-03 01:58:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 409. [2022-11-03 01:58:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 309 states have (on average 1.2686084142394822) internal successors, (392), 317 states have internal predecessors, (392), 71 states have call successors, (71), 29 states have call predecessors, (71), 28 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-03 01:58:56,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 529 transitions. [2022-11-03 01:58:56,754 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 529 transitions. Word has length 32 [2022-11-03 01:58:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:56,755 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 529 transitions. [2022-11-03 01:58:56,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:58:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 529 transitions. [2022-11-03 01:58:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 01:58:56,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:56,766 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:56,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:56,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:56,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash 451634024, now seen corresponding path program 1 times [2022-11-03 01:58:56,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:56,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650186529] [2022-11-03 01:58:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:56,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:56,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:56,988 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:56,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:58:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:57,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:58:57,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:58:57,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:57,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:57,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650186529] [2022-11-03 01:58:57,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650186529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:57,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:57,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:57,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526178784] [2022-11-03 01:58:57,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:57,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:57,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:57,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:57,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:57,431 INFO L87 Difference]: Start difference. First operand 409 states and 529 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:58:57,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:57,798 INFO L93 Difference]: Finished difference Result 956 states and 1266 transitions. [2022-11-03 01:58:57,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:58:57,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2022-11-03 01:58:57,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:57,808 INFO L225 Difference]: With dead ends: 956 [2022-11-03 01:58:57,808 INFO L226 Difference]: Without dead ends: 562 [2022-11-03 01:58:57,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:58:57,813 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 620 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:57,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 1111 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:57,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-11-03 01:58:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 412. [2022-11-03 01:58:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 312 states have (on average 1.2628205128205128) internal successors, (394), 320 states have internal predecessors, (394), 71 states have call successors, (71), 29 states have call predecessors, (71), 28 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-03 01:58:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 531 transitions. [2022-11-03 01:58:57,907 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 531 transitions. Word has length 55 [2022-11-03 01:58:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:57,908 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 531 transitions. [2022-11-03 01:58:57,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:58:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 531 transitions. [2022-11-03 01:58:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 01:58:57,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:57,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:57,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:58,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:58,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:58,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:58,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1188950696, now seen corresponding path program 1 times [2022-11-03 01:58:58,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:58,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438654037] [2022-11-03 01:58:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:58,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:58,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:58,130 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:58,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:58:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:58,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:58:58,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:58:58,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:58,920 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:58,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438654037] [2022-11-03 01:58:58,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438654037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:58,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:58,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:58:58,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106146871] [2022-11-03 01:58:58,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:58,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:58,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:58,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:58,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:58,923 INFO L87 Difference]: Start difference. First operand 412 states and 531 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:58:59,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:59,090 INFO L93 Difference]: Finished difference Result 1205 states and 1564 transitions. [2022-11-03 01:58:59,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:59,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2022-11-03 01:58:59,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:59,096 INFO L225 Difference]: With dead ends: 1205 [2022-11-03 01:58:59,096 INFO L226 Difference]: Without dead ends: 808 [2022-11-03 01:58:59,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:59,098 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 243 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:59,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 586 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:59,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-11-03 01:58:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 798. [2022-11-03 01:58:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 609 states have (on average 1.2594417077175697) internal successors, (767), 621 states have internal predecessors, (767), 134 states have call successors, (134), 55 states have call predecessors, (134), 54 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2022-11-03 01:58:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1032 transitions. [2022-11-03 01:58:59,188 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1032 transitions. Word has length 55 [2022-11-03 01:58:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:59,189 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1032 transitions. [2022-11-03 01:58:59,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:58:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1032 transitions. [2022-11-03 01:58:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 01:58:59,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:59,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:59,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:59,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:59,407 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:59,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:59,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1797229676, now seen corresponding path program 1 times [2022-11-03 01:58:59,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:59,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242842690] [2022-11-03 01:58:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:59,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:59,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:59,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:59,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:58:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:59,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:58:59,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:59:00,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:00,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:00,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242842690] [2022-11-03 01:59:00,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242842690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:00,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:00,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:59:00,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355941029] [2022-11-03 01:59:00,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:00,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:59:00,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:00,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:59:00,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:00,205 INFO L87 Difference]: Start difference. First operand 798 states and 1032 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:59:00,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:00,302 INFO L93 Difference]: Finished difference Result 800 states and 1033 transitions. [2022-11-03 01:59:00,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:59:00,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2022-11-03 01:59:00,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:00,307 INFO L225 Difference]: With dead ends: 800 [2022-11-03 01:59:00,307 INFO L226 Difference]: Without dead ends: 797 [2022-11-03 01:59:00,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:00,308 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 243 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:00,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 282 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:59:00,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-03 01:59:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 797. [2022-11-03 01:59:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 609 states have (on average 1.257799671592775) internal successors, (766), 620 states have internal predecessors, (766), 133 states have call successors, (133), 55 states have call predecessors, (133), 54 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2022-11-03 01:59:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1030 transitions. [2022-11-03 01:59:00,432 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1030 transitions. Word has length 56 [2022-11-03 01:59:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:00,433 INFO L495 AbstractCegarLoop]: Abstraction has 797 states and 1030 transitions. [2022-11-03 01:59:00,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:59:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1030 transitions. [2022-11-03 01:59:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 01:59:00,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:00,434 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:00,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:00,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:00,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:00,649 INFO L85 PathProgramCache]: Analyzing trace with hash 120464171, now seen corresponding path program 1 times [2022-11-03 01:59:00,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:00,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460673065] [2022-11-03 01:59:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:00,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:00,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:00,654 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:00,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:59:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:01,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:59:01,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:59:01,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:01,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:01,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460673065] [2022-11-03 01:59:01,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460673065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:01,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:01,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:59:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923572614] [2022-11-03 01:59:01,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:01,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:59:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:59:01,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:01,192 INFO L87 Difference]: Start difference. First operand 797 states and 1030 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:59:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:01,307 INFO L93 Difference]: Finished difference Result 799 states and 1031 transitions. [2022-11-03 01:59:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:59:01,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2022-11-03 01:59:01,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:01,311 INFO L225 Difference]: With dead ends: 799 [2022-11-03 01:59:01,312 INFO L226 Difference]: Without dead ends: 796 [2022-11-03 01:59:01,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:01,313 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:01,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 280 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:59:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-11-03 01:59:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2022-11-03 01:59:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 609 states have (on average 1.2561576354679802) internal successors, (765), 619 states have internal predecessors, (765), 132 states have call successors, (132), 55 states have call predecessors, (132), 54 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2022-11-03 01:59:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1028 transitions. [2022-11-03 01:59:01,450 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1028 transitions. Word has length 57 [2022-11-03 01:59:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:01,452 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1028 transitions. [2022-11-03 01:59:01,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:59:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1028 transitions. [2022-11-03 01:59:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 01:59:01,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:01,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:01,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:01,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:01,671 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash -560563849, now seen corresponding path program 1 times [2022-11-03 01:59:01,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:01,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055657028] [2022-11-03 01:59:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:01,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:01,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:01,674 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:01,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:59:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:02,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:59:02,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:59:02,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:02,189 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:02,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055657028] [2022-11-03 01:59:02,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055657028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:02,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:02,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:59:02,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236412951] [2022-11-03 01:59:02,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:02,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:59:02,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:02,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:59:02,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:02,191 INFO L87 Difference]: Start difference. First operand 796 states and 1028 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:59:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:02,320 INFO L93 Difference]: Finished difference Result 798 states and 1029 transitions. [2022-11-03 01:59:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:59:02,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2022-11-03 01:59:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:02,325 INFO L225 Difference]: With dead ends: 798 [2022-11-03 01:59:02,325 INFO L226 Difference]: Without dead ends: 795 [2022-11-03 01:59:02,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:02,327 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 237 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:02,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 278 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:59:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-11-03 01:59:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 795. [2022-11-03 01:59:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 609 states have (on average 1.2545155993431856) internal successors, (764), 618 states have internal predecessors, (764), 131 states have call successors, (131), 55 states have call predecessors, (131), 54 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2022-11-03 01:59:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1026 transitions. [2022-11-03 01:59:02,444 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1026 transitions. Word has length 58 [2022-11-03 01:59:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:02,445 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 1026 transitions. [2022-11-03 01:59:02,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:59:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1026 transitions. [2022-11-03 01:59:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 01:59:02,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:02,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:02,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:02,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:02,662 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:02,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:02,663 INFO L85 PathProgramCache]: Analyzing trace with hash -197591122, now seen corresponding path program 1 times [2022-11-03 01:59:02,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:02,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451078837] [2022-11-03 01:59:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:02,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:02,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:02,665 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:02,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:59:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:02,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:59:02,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:59:03,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:03,199 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:03,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451078837] [2022-11-03 01:59:03,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451078837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:03,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:03,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:59:03,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305494714] [2022-11-03 01:59:03,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:03,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:59:03,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:03,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:59:03,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:03,200 INFO L87 Difference]: Start difference. First operand 795 states and 1026 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:59:03,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:03,311 INFO L93 Difference]: Finished difference Result 797 states and 1027 transitions. [2022-11-03 01:59:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:59:03,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2022-11-03 01:59:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:03,316 INFO L225 Difference]: With dead ends: 797 [2022-11-03 01:59:03,317 INFO L226 Difference]: Without dead ends: 785 [2022-11-03 01:59:03,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:03,318 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 234 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:03,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:59:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-11-03 01:59:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 785. [2022-11-03 01:59:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 600 states have (on average 1.2533333333333334) internal successors, (752), 608 states have internal predecessors, (752), 130 states have call successors, (130), 55 states have call predecessors, (130), 54 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2022-11-03 01:59:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1013 transitions. [2022-11-03 01:59:03,484 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1013 transitions. Word has length 59 [2022-11-03 01:59:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:03,484 INFO L495 AbstractCegarLoop]: Abstraction has 785 states and 1013 transitions. [2022-11-03 01:59:03,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:59:03,485 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1013 transitions. [2022-11-03 01:59:03,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-03 01:59:03,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:03,488 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:03,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:03,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:03,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:03,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash 415459010, now seen corresponding path program 1 times [2022-11-03 01:59:03,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:03,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981142697] [2022-11-03 01:59:03,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:03,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:03,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:03,708 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:03,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:59:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:04,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:59:04,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-03 01:59:04,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:04,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:04,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981142697] [2022-11-03 01:59:04,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981142697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:04,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:04,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:59:04,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753953131] [2022-11-03 01:59:04,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:04,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:59:04,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:04,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:59:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:04,340 INFO L87 Difference]: Start difference. First operand 785 states and 1013 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:59:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:04,543 INFO L93 Difference]: Finished difference Result 1619 states and 2097 transitions. [2022-11-03 01:59:04,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:59:04,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 159 [2022-11-03 01:59:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:04,548 INFO L225 Difference]: With dead ends: 1619 [2022-11-03 01:59:04,549 INFO L226 Difference]: Without dead ends: 849 [2022-11-03 01:59:04,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:04,553 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 41 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:04,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 533 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:59:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-03 01:59:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 839. [2022-11-03 01:59:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 653 states have (on average 1.2649310872894335) internal successors, (826), 661 states have internal predecessors, (826), 130 states have call successors, (130), 56 states have call predecessors, (130), 55 states have return successors, (131), 129 states have call predecessors, (131), 129 states have call successors, (131) [2022-11-03 01:59:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1087 transitions. [2022-11-03 01:59:04,683 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1087 transitions. Word has length 159 [2022-11-03 01:59:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:04,684 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1087 transitions. [2022-11-03 01:59:04,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:59:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1087 transitions. [2022-11-03 01:59:04,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-03 01:59:04,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:04,692 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:04,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:04,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:04,925 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:04,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1466528889, now seen corresponding path program 1 times [2022-11-03 01:59:04,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:04,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081965048] [2022-11-03 01:59:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:04,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:04,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:04,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:04,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:59:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:05,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-03 01:59:05,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:05,583 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:05,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081965048] [2022-11-03 01:59:05,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081965048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:05,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:05,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:05,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287891911] [2022-11-03 01:59:05,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:05,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:05,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:05,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:05,585 INFO L87 Difference]: Start difference. First operand 839 states and 1087 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:59:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:05,779 INFO L93 Difference]: Finished difference Result 1675 states and 2183 transitions. [2022-11-03 01:59:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:59:05,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 168 [2022-11-03 01:59:05,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:05,785 INFO L225 Difference]: With dead ends: 1675 [2022-11-03 01:59:05,785 INFO L226 Difference]: Without dead ends: 847 [2022-11-03 01:59:05,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:05,788 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 0 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:05,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1078 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:59:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-11-03 01:59:05,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2022-11-03 01:59:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 657 states have (on average 1.2633181126331812) internal successors, (830), 669 states have internal predecessors, (830), 130 states have call successors, (130), 56 states have call predecessors, (130), 59 states have return successors, (143), 129 states have call predecessors, (143), 129 states have call successors, (143) [2022-11-03 01:59:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1103 transitions. [2022-11-03 01:59:05,951 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1103 transitions. Word has length 168 [2022-11-03 01:59:05,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:05,952 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1103 transitions. [2022-11-03 01:59:05,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:59:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1103 transitions. [2022-11-03 01:59:05,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 01:59:05,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:05,956 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:05,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:06,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:06,173 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:06,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1167905577, now seen corresponding path program 1 times [2022-11-03 01:59:06,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:06,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926118232] [2022-11-03 01:59:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:06,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:06,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:06,176 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:06,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:59:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:06,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:59:06,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 01:59:06,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:06,790 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:06,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926118232] [2022-11-03 01:59:06,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926118232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:06,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:06,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:06,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338923073] [2022-11-03 01:59:06,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:06,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:06,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:06,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:06,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:06,793 INFO L87 Difference]: Start difference. First operand 847 states and 1103 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:59:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:07,096 INFO L93 Difference]: Finished difference Result 2249 states and 3010 transitions. [2022-11-03 01:59:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:59:07,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 174 [2022-11-03 01:59:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:07,104 INFO L225 Difference]: With dead ends: 2249 [2022-11-03 01:59:07,105 INFO L226 Difference]: Without dead ends: 1421 [2022-11-03 01:59:07,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:59:07,108 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 322 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:07,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1343 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:59:07,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2022-11-03 01:59:07,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 859. [2022-11-03 01:59:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 669 states have (on average 1.258594917787743) internal successors, (842), 681 states have internal predecessors, (842), 130 states have call successors, (130), 56 states have call predecessors, (130), 59 states have return successors, (143), 129 states have call predecessors, (143), 129 states have call successors, (143) [2022-11-03 01:59:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1115 transitions. [2022-11-03 01:59:07,252 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1115 transitions. Word has length 174 [2022-11-03 01:59:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:07,253 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1115 transitions. [2022-11-03 01:59:07,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:59:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1115 transitions. [2022-11-03 01:59:07,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-03 01:59:07,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:07,257 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:07,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:07,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:07,471 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:07,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1428729328, now seen corresponding path program 1 times [2022-11-03 01:59:07,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:07,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49827044] [2022-11-03 01:59:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:07,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:07,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:07,473 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:07,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:59:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:08,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:59:08,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 01:59:08,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:08,358 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:08,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49827044] [2022-11-03 01:59:08,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49827044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:08,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:08,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 01:59:08,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370421981] [2022-11-03 01:59:08,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:08,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:59:08,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:59:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:59:08,360 INFO L87 Difference]: Start difference. First operand 859 states and 1115 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 8 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:59:10,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:59:10,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:10,930 INFO L93 Difference]: Finished difference Result 2243 states and 2993 transitions. [2022-11-03 01:59:10,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:59:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 8 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 176 [2022-11-03 01:59:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:10,937 INFO L225 Difference]: With dead ends: 2243 [2022-11-03 01:59:10,937 INFO L226 Difference]: Without dead ends: 1403 [2022-11-03 01:59:10,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:59:10,940 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 203 mSDsluCounter, 2933 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 3317 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:10,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 3317 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 01:59:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-11-03 01:59:11,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 891. [2022-11-03 01:59:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 697 states have (on average 1.248206599713056) internal successors, (870), 705 states have internal predecessors, (870), 130 states have call successors, (130), 56 states have call predecessors, (130), 63 states have return successors, (151), 137 states have call predecessors, (151), 129 states have call successors, (151) [2022-11-03 01:59:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1151 transitions. [2022-11-03 01:59:11,091 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1151 transitions. Word has length 176 [2022-11-03 01:59:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:11,092 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1151 transitions. [2022-11-03 01:59:11,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 8 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:59:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1151 transitions. [2022-11-03 01:59:11,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 01:59:11,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:11,097 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:11,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:11,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:11,313 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash 47100754, now seen corresponding path program 2 times [2022-11-03 01:59:11,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:11,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23242411] [2022-11-03 01:59:11,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:59:11,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:11,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:11,315 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:11,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:59:11,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-03 01:59:11,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:59:11,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:59:11,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-03 01:59:11,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:11,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:11,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23242411] [2022-11-03 01:59:11,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23242411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:11,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:11,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:59:11,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598927160] [2022-11-03 01:59:11,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:11,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:59:11,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:11,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:59:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:59:11,713 INFO L87 Difference]: Start difference. First operand 891 states and 1151 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:59:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:12,187 INFO L93 Difference]: Finished difference Result 2699 states and 3495 transitions. [2022-11-03 01:59:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:12,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 182 [2022-11-03 01:59:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:12,195 INFO L225 Difference]: With dead ends: 2699 [2022-11-03 01:59:12,196 INFO L226 Difference]: Without dead ends: 1827 [2022-11-03 01:59:12,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:59:12,199 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 372 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:12,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1738 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:59:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2022-11-03 01:59:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 927. [2022-11-03 01:59:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 725 states have (on average 1.2386206896551724) internal successors, (898), 733 states have internal predecessors, (898), 138 states have call successors, (138), 56 states have call predecessors, (138), 63 states have return successors, (159), 145 states have call predecessors, (159), 137 states have call successors, (159) [2022-11-03 01:59:12,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1195 transitions. [2022-11-03 01:59:12,388 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1195 transitions. Word has length 182 [2022-11-03 01:59:12,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:12,389 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1195 transitions. [2022-11-03 01:59:12,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:59:12,390 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1195 transitions. [2022-11-03 01:59:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 01:59:12,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:12,393 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:12,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:12,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:12,623 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:12,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:12,624 INFO L85 PathProgramCache]: Analyzing trace with hash -964016496, now seen corresponding path program 1 times [2022-11-03 01:59:12,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:12,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339741986] [2022-11-03 01:59:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:12,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:12,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:12,625 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:12,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:59:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:13,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:59:13,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 01:59:13,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 01:59:14,331 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:14,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339741986] [2022-11-03 01:59:14,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339741986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:14,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1509356192] [2022-11-03 01:59:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:14,332 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:59:14,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:59:14,336 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:59:14,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 01:59:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:14,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:59:14,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 01:59:14,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 01:59:15,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1509356192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:15,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479068961] [2022-11-03 01:59:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:15,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:15,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:15,402 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:15,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:59:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:15,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:59:15,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 01:59:15,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 01:59:16,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479068961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:16,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:59:16,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 01:59:16,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406937691] [2022-11-03 01:59:16,385 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:16,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:59:16,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:16,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:59:16,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:59:16,387 INFO L87 Difference]: Start difference. First operand 927 states and 1195 transitions. Second operand has 16 states, 16 states have (on average 8.1875) internal successors, (131), 12 states have internal predecessors, (131), 4 states have call successors, (23), 2 states have call predecessors, (23), 6 states have return successors, (25), 8 states have call predecessors, (25), 4 states have call successors, (25) [2022-11-03 01:59:18,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:59:21,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:59:23,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:59:24,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:59:24,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:24,300 INFO L93 Difference]: Finished difference Result 2061 states and 2688 transitions. [2022-11-03 01:59:24,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:59:24,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.1875) internal successors, (131), 12 states have internal predecessors, (131), 4 states have call successors, (23), 2 states have call predecessors, (23), 6 states have return successors, (25), 8 states have call predecessors, (25), 4 states have call successors, (25) Word has length 182 [2022-11-03 01:59:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:24,306 INFO L225 Difference]: With dead ends: 2061 [2022-11-03 01:59:24,306 INFO L226 Difference]: Without dead ends: 1153 [2022-11-03 01:59:24,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1088 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:59:24,309 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 63 mSDsluCounter, 3118 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 3447 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:24,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 3447 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 3 Unknown, 0 Unchecked, 7.6s Time] [2022-11-03 01:59:24,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-11-03 01:59:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 935. [2022-11-03 01:59:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 729 states have (on average 1.2373113854595337) internal successors, (902), 737 states have internal predecessors, (902), 142 states have call successors, (142), 56 states have call predecessors, (142), 63 states have return successors, (167), 149 states have call predecessors, (167), 141 states have call successors, (167) [2022-11-03 01:59:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1211 transitions. [2022-11-03 01:59:24,485 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1211 transitions. Word has length 182 [2022-11-03 01:59:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:24,486 INFO L495 AbstractCegarLoop]: Abstraction has 935 states and 1211 transitions. [2022-11-03 01:59:24,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.1875) internal successors, (131), 12 states have internal predecessors, (131), 4 states have call successors, (23), 2 states have call predecessors, (23), 6 states have return successors, (25), 8 states have call predecessors, (25), 4 states have call successors, (25) [2022-11-03 01:59:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1211 transitions. [2022-11-03 01:59:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 01:59:24,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:24,490 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:24,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:24,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-03 01:59:24,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:25,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:25,095 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:25,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:25,095 INFO L85 PathProgramCache]: Analyzing trace with hash -186049426, now seen corresponding path program 2 times [2022-11-03 01:59:25,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:25,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063587881] [2022-11-03 01:59:25,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:59:25,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:25,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:25,097 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:25,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:59:25,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-03 01:59:25,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:59:25,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:59:25,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-03 01:59:25,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:25,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:25,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063587881] [2022-11-03 01:59:25,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063587881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:25,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:25,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:25,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282415308] [2022-11-03 01:59:25,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:25,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:25,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:25,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:25,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:25,677 INFO L87 Difference]: Start difference. First operand 935 states and 1211 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:59:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:27,156 INFO L93 Difference]: Finished difference Result 2039 states and 2678 transitions. [2022-11-03 01:59:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:59:27,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 188 [2022-11-03 01:59:27,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:27,162 INFO L225 Difference]: With dead ends: 2039 [2022-11-03 01:59:27,162 INFO L226 Difference]: Without dead ends: 1123 [2022-11-03 01:59:27,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:59:27,166 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 697 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:27,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 2096 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 01:59:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-11-03 01:59:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 929. [2022-11-03 01:59:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 725 states have (on average 1.2358620689655173) internal successors, (896), 733 states have internal predecessors, (896), 140 states have call successors, (140), 56 states have call predecessors, (140), 63 states have return successors, (165), 147 states have call predecessors, (165), 139 states have call successors, (165) [2022-11-03 01:59:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1201 transitions. [2022-11-03 01:59:27,340 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1201 transitions. Word has length 188 [2022-11-03 01:59:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:27,340 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1201 transitions. [2022-11-03 01:59:27,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:59:27,340 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1201 transitions. [2022-11-03 01:59:27,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-03 01:59:27,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:27,344 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:27,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:27,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:27,570 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:27,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:27,570 INFO L85 PathProgramCache]: Analyzing trace with hash -793259544, now seen corresponding path program 1 times [2022-11-03 01:59:27,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:27,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628410444] [2022-11-03 01:59:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:27,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:27,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:27,573 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:27,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:59:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:28,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:59:28,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 01:59:28,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:59:28,803 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:28,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628410444] [2022-11-03 01:59:28,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628410444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:28,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:28,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:59:28,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207633294] [2022-11-03 01:59:28,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:28,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:59:28,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:28,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:59:28,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:59:28,805 INFO L87 Difference]: Start difference. First operand 929 states and 1201 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:59:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:29,230 INFO L93 Difference]: Finished difference Result 2229 states and 2948 transitions. [2022-11-03 01:59:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:59:29,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 207 [2022-11-03 01:59:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:29,237 INFO L225 Difference]: With dead ends: 2229 [2022-11-03 01:59:29,237 INFO L226 Difference]: Without dead ends: 1319 [2022-11-03 01:59:29,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:59:29,239 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 92 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:29,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 1821 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:59:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-11-03 01:59:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 941. [2022-11-03 01:59:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 737 states have (on average 1.2320217096336499) internal successors, (908), 741 states have internal predecessors, (908), 140 states have call successors, (140), 56 states have call predecessors, (140), 63 states have return successors, (165), 151 states have call predecessors, (165), 139 states have call successors, (165) [2022-11-03 01:59:29,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1213 transitions. [2022-11-03 01:59:29,479 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1213 transitions. Word has length 207 [2022-11-03 01:59:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:29,480 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1213 transitions. [2022-11-03 01:59:29,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:59:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1213 transitions. [2022-11-03 01:59:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-03 01:59:29,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:29,484 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:29,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:29,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:29,687 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash -792709686, now seen corresponding path program 2 times [2022-11-03 01:59:29,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:29,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948221546] [2022-11-03 01:59:29,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:59:29,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:29,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:29,690 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:29,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 01:59:31,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:59:31,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:59:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:59:31,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-03 01:59:32,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-03 01:59:32,727 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:32,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948221546] [2022-11-03 01:59:32,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948221546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:32,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1812686941] [2022-11-03 01:59:32,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:59:32,728 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:59:32,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:59:32,733 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:59:32,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3304dee-17c8-4a8d-be8d-8d3e1c2e9b51/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process